{
  "id": "goiania-accident",
  "title": "Goiânia accident",
  "lang": "en",
  "source_lang": "en",
  "summary": "A 1987 radiological accident in Brazil caused by the dispersal of caesium-137 from an abandoned medical source.",
  "category": "nature",
  "subcategory": "climate-environment",
  "type": "event",
  "aliases": [
    "Goiânia radiological accident",
    "Goiania accident",
    "Caesium-137 accident",
    "Cesium-137 accident",
    "Acidente radiológico de Goiânia",
    "Acidente com o césio-137"
  ],
  "generated_at": "2026-10-15",
  "model": "pro/gpt-6.1-sol",
  "url": "https://aiwiki.page/en/goiania-accident/",
  "translations": {
    "zh-Hans": {
      "url": "https://aiwiki.page/zh/goiania-accident/",
      "json": "https://aiwiki.page/zh/goiania-accident.json"
    }
  },
  "sections": [
    {
      "heading": "",
      "text": "The Goiânia accident was a radiological contamination accident that began on 13 September 1987 in Goiânia, the capital of Goiás state in Brazil. A caesium-137 source taken from an abandoned radiotherapy clinic was dismantled and its radioactive contents dispersed through scrap yards and households. Unlike a nuclear reactor accident, it involved the loss of control over a medical radiation source. Screening identified 249 contaminated people, and four people died from acute radiation injuries. (www-pub.iaea.org)\n\nThe accident demonstrated how an unsecured medical source could become an urban public health emergency through scrap trading and ordinary social contact. The response combined mass screening, specialist medical care, environmental surveys, demolition and decontamination, and radioactive-waste management. Its consequences also included psychological distress, disruption to livelihoods, long-term health monitoring, and legal proceedings concerning victims’ rights. Goiânia subsequently became an important international case study in the control of orphan radioactive sources and preparedness for radiological emergencies. (iaea.org)"
    },
    {
      "heading": "The abandoned clinic and loss of source control",
      "text": "The Instituto Goiano de Radioterapia (IGR) was a private radiotherapy clinic on Avenida Paranaíba in central Goiânia, Brazil. Its caesium-137 treatment equipment entered service in 1971. At about the end of 1985, the institute ceased operating at that address and transferred its clinical activities to other premises. A cobalt-60 teletherapy unit was moved, but the caesium-137 unit remained behind. The International Atomic Energy Agency’s (IAEA) 1988 investigation recorded that ownership of the old clinic’s contents was disputed during this transition. (mpf.mp.br)\n\nThe equipment had originally operated within a licensing framework rather than outside regulatory oversight. On 17 June 1971, Brazil’s National Nuclear Energy Commission (Comissão Nacional de Energia Nuclear, CNEN) approved importation of the caesium source; installation, inspection and operation followed. Under the operating licence, a physicist and a physician—the latter one of the clinic’s partners—were jointly responsible for compliance. Significant changes in the equipment’s status or in the facilities had to be reported to CNEN. The 1988 investigation stated that CNEN had not received the appropriate notifications concerning the changes associated with the clinic’s departure. (www-pub.iaea.org)\n\nThe physical condition of the former premises then removed the protection previously provided by an operating medical establishment. Most of the clinic and some neighbouring properties were demolished, while the treatment rooms survived in a derelict state. Brazil’s Federal Public Prosecutor’s Office likewise describes the room containing the apparatus as having remained without security after the surrounding demolition. The resulting site was neither a functioning clinic with controlled access nor a cleared property from which the radioactive equipment had been removed: the machine remained inside accessible remnants of the building. (www-pub.iaea.org)\n\nThe IAEA’s 2018 retrospective explicitly connects these events: the relocation was not notified as the licence required, the former premises were partly demolished, and the source consequently remained insecure. On 13 September 1987, two people looking for saleable scrap entered the site and removed the source-containing assembly. Their access marks the transition from an inadequately secured medical source to material circulating outside institutional custody; the subsequent dismantling and dispersal occurred after its removal from the clinic. (www-pub.iaea.org)\n\nThe notification failure and the documented condition of the building are distinct from judicial findings about individual liability. The 1988 IAEA report expressly stated that the circumstances of abandonment had not been completely clarified and were then subject to legal proceedings. Its account therefore establishes the licensing obligations and observed loss of security without constituting a court’s allocation of criminal or civil responsibility. (www-pub.iaea.org)"
    },
    {
      "heading": "The radioactive source and its hazards",
      "text": "The source was installed in a Cesapan F-3000 teletherapy machine, designed to deliver radiation from outside the patient’s body. Its radioactive contents were caesium chloride compacted into a coherent mass and doubly sealed in stainless-steel capsules within a standardized source capsule. This containment was distinct from the machine’s radiation shielding: the capsule retained the salt, while the shielded treatment head and its lead-and-stainless-steel source wheel restricted irradiation. During treatment, an electrically operated shutter aligned the source with the beam aperture; a spring returned it to the shielded position after exposure or a power failure. In September 1987, the source’s activity was approximately 50.9 terabecquerels (TBq), equivalent to 1,375 curies. (www-pub.iaea.org)\n\nCaesium-137 has a physical half-life of approximately 30 years: radioactive decay alone takes about three decades to halve the number of remaining caesium-137 nuclei, and hence their activity. It undergoes beta decay, predominantly producing the short-lived metastable daughter barium-137m, whose transition to stable barium-137 produces the associated gamma radiation. The distinction matters because the penetrating gamma photons can deliver energy to internal organs even when the radioactive material remains outside the body. The source therefore remained hazardous despite having been unused for years; cessation of clinical operation did not stop its nuclear decay. (nepis.epa.gov)\n\nActivity describes the rate of nuclear transformations, not the dose received by a person. One becquerel represents one transformation per second, so 50.9 TBq corresponds to approximately \\(5.09 \\times 10^{13}\\) transformations per second. By contrast, absorbed dose measures radiation energy deposited per unit mass: one gray (Gy) equals one joule per kilogram. Dose rate expresses how quickly that energy is deposited, for example in grays per hour. Consequently, a source activity cannot be read directly as a person’s dose; the exposure geometry and duration must also be established. (nucleus.iaea.org) The IAEA’s accident report listed a dose rate of approximately \\(4.56\\ \\mathrm{Gy\\,h^{-1}}\\) at one metre for the source without its protective shielding. (www-pub.iaea.org)\n\nBreaching the capsule introduced a different hazard from external irradiation alone. The highly soluble, readily dispersible caesium chloride could contaminate surroundings rather than remain confined to one sealed object. The accident consequently involved both external irradiation and internal contamination. (iaea.org) Powder could be inhaled or swallowed, while dissolved caesium could be transferred with water. Once absorbed, radioactive caesium is distributed through soft tissues, particularly muscle, allowing irradiation to continue from within the body. Its physical half-life is therefore distinct from its biological retention: radioactive decay and bodily elimination are separate processes. (epa.gov)\n\nWitnesses also reported a blue glow in the dark, which attracted visitors and encouraged the sharing of small fragments as curiosities. The IAEA’s contemporary account records this observation and its role in bringing people into contact with the source material. (iaea.org) The original investigation did not conclusively establish the light-producing mechanism; the reported glow should therefore be distinguished from a demonstrated physical explanation. (www-pub.iaea.org)"
    },
    {
      "heading": "Removal, dismantling, and dispersal, 13–28 September 1987",
      "text": "On 13 September 1987, two scrap collectors, identified in the International Atomic Energy Agency’s chronology as R.A. and W.P., removed the source-containing assembly from the abandoned clinic’s radiotherapy machine. Seeking saleable metal, they transported it in a wheelbarrow to R.A.’s home, approximately half a kilometre away. Further dismantling in his backyard breached the capsule and released radioactive caesium chloride. This changed the accident from exposure to a contained source into dispersal of radioactive material through handling and movement between properties. (www-pub.iaea.org)\n\nBoth men vomited on the evening of 13 September, initially blaming something they had eaten. On 14 September, W.P. developed diarrhoea, dizziness and swelling of one hand; a doctor consulted on 15 September attributed his symptoms to a food-related allergic reaction. R.A. meanwhile continued working on the assembly. The early gastrointestinal symptoms therefore did not prompt recognition of radiation exposure, and handling of the equipment continued. (www-pub.iaea.org)\n\nOn 18 September, the remnants were sold to a scrap yard adjoining its manager’s home, designated “Junkyard I” in the investigation. That night the manager, D.F., noticed a blue glow from the capsule and brought it indoors. Neighbours, relatives and acquaintances subsequently visited to see it. On 21 September, a friend removed rice-grain-sized fragments, shared some with his brother and took others home; D.F. also distributed fragments within his family. The material crumbled readily, and some recipients applied the powder to their skin. Visits and gifts thus carried contamination beyond the original dismantling site. (www-pub.iaea.org)\n\nOn 24 September, D.F.’s brother took fragments to his own home beside “Junkyard II”. They were placed on a table during a meal, where his six-year-old daughter handled them while eating with her hands, providing a route for ingestion. On 25 September, D.F. sold the lead and remaining assembly to “Junkyard III”. These were distinct transfers between particular homes and scrap businesses, not uniform contamination across Goiânia. (www-pub.iaea.org)\n\nAs illness appeared among additional contacts, its cause remained unrecognized. Some patients were thought to have a tropical disease rather than radiation injury. (orau.gov) By 28 September, D.F.’s wife suspected that the glowing material was responsible. She recovered the remnants from the receiving scrap yard and took them by bus, in a bag, to the city’s public health department, Vigilância Sanitária. This brought the material to officials, although its radioactivity was not instrumentally identified until 29 September. (www-pub.iaea.org)"
    },
    {
      "heading": "Recognition and emergency mobilization",
      "text": "On 28 September 1987, Maria Gabriela Ferreira, the wife of the scrap-yard owner who had acquired the source remnants, suspected that the glowing material was responsible for illness among relatives and acquaintances. She and a scrap-yard employee recovered the remnants and took them by bus, in a bag, to Goiânia’s Vigilância Sanitária, the local public health authority. The package was initially placed on a doctor’s desk, then moved to a chair in the courtyard. Meanwhile, hospital doctors investigating patients with similar symptoms had begun to suspect radiation injury and sought a physicist’s examination of the material. (goias.gov.br)\n\nOn the morning of 29 September, a visiting medical physicist borrowed a scintillation instrument from NUCLEBRAS’s local uranium-prospecting office. It registered beyond its measurement range before he reached the health-authority premises; a replacement confirmed that the response was not an instrument fault. Measurements established the presence of intense radioactivity, prompting evacuation of the premises and investigation of the scrap yard. At approximately 15:00, Brazil’s National Nuclear Energy Commission (CNEN) was notified by telephone. Police, firefighters, ambulance services and hospitals were alerted, and by 20:00 the Olympic Stadium had been designated as a reception and contamination-screening centre. (www-pub.iaea.org)\n\nCNEN’s advance team reached Goiânia at approximately 00:30 on 30 September, accompanied by two technicians from São Paulo carrying monitoring equipment; medical and radiation-protection reinforcements followed that morning. Local authorities transferred operational management to CNEN while continuing to supply facilities and personnel. State military police and fire brigades supported the response, with the Brazilian army joining later. Evacuations and access restrictions concerned identified contaminated premises and their surroundings, rather than the city as a whole. An initial evacuation criterion of \\(2.5\\,\\mu\\text{Sv}/\\text{h}\\) was used to identify areas requiring protective action. (www-pub.iaea.org)\n\nThe immediate priorities were medical assessment, isolation of the source and contaminated areas, environmental measurements, and reinforcement of personnel and equipment. On 30 September, the source remnants in the health-authority courtyard were shielded in place with concrete, substantially reducing surrounding dose rates and allowing much of the cordoned area to reopen. Emergency arrangements had previously been designed principally for nuclear-power accidents or smaller radiological incidents, so elements of existing plans had to be combined for the urban contamination emergency. Health services received people evacuated from affected locations, while police and firefighters maintained restricted access as monitoring identified further sites. (www-pub.iaea.org)\n\nBrazil also requested international assistance through the International Atomic Energy Agency (IAEA) under the Convention on Assistance in the Case of a Nuclear Accident or Radiological Emergency. The IAEA arranged support from United States medical specialists and its technical-cooperation experts, supplied dosimeters, and coordinated monitoring equipment from France, the Federal Republic of Germany, Hungary, Israel, the Netherlands and the United Kingdom. These contributions supplemented, rather than replaced, the Brazilian response: monitoring instruments supported the identification of contamination, while dosimeters supported exposure assessment. Separately, Argentina, France, the Federal Republic of Germany, the Soviet Union, the United Kingdom and the United States provided experts and equipment directly to Brazil through bilateral assistance. (iaea.org)"
    },
    {
      "heading": "Population screening and reconstruction of exposure",
      "text": "From 30 September to 22 December 1987, Brazil’s National Nuclear Energy Commission (CNEN) operated a monitoring centre at Goiânia’s Olympic Stadium. Approximately 112,000 people underwent screening, but 249 were identified as having external or internal radioactive contamination. The attendance total therefore describes the scale of the public-health operation, not the number demonstrably contaminated or seriously irradiated. The stadium provided a place to identify contaminated people and separate those requiring further assessment from the much larger population seeking examination. (www-pub.iaea.org)\n\nAssessment distinguished three overlapping conditions. External irradiation meant exposure to radiation from material outside the body, without necessarily acquiring radioactive material. External contamination meant radioactive caesium on skin or clothing; internal contamination meant uptake into the body. Surface monitoring could identify external contamination, whereas internal uptake required biological samples or body measurements. These tests did not, by themselves, establish the radiation dose already absorbed. A person could have experienced more than one exposure pathway. (www-pub.iaea.org)\n\nReconstructing external exposure combined environmental dose-rate surveys with interviews about patients’ movements, contacts and time spent near the material. Retrospective estimates were difficult because people and radioactive fragments had moved between locations, exposure durations were often unknown, and source-to-body distances and shielding varied. A dose rate measured after discovery could not simply be treated as the rate prevailing throughout the preceding days. CNEN therefore used physical reconstruction alongside biological evidence rather than relying on a single environmental reading. (www-pub.iaea.org)\n\nCytogenetic dosimetry supplied evidence of absorbed dose independently of patients’ recollections. Investigators examined cultured blood lymphocytes for abnormal chromosomes, particularly dicentrics and centric rings, and compared their frequencies with laboratory calibration curves. A. T. Ramalho and colleagues reported analyses of 110 exposed or potentially exposed people; later publications described an expanded series of 129. The initial investigation produced estimates extending to about 7 grays. The distribution of aberrations among cells also helped identify some non-uniform exposures, in which different body regions had received different doses. These were biological estimates, not direct readings from personal dosimeters worn during the accident. (pubmed.ncbi.nlm.nih.gov)\n\nInternal assessment initially relied on urine and faecal analyses; a whole-body counter installed in Goiânia in November 1987 added measurements of caesium retained in the body. The field system used a sodium iodide detector to measure gamma emissions, with procedures adapted to different body sizes and widely varying contamination levels. Repeated counting and excreta measurements followed the decline in body burden and supported evaluation of caesium removal during treatment. Age-specific models translated measured activity and excretion into estimates of intake and subsequent internal dose, keeping the amount of radioactive material distinct from the energy deposited in tissue. (pubmed.ncbi.nlm.nih.gov)"
    },
    {
      "heading": "Acute injuries and medical management",
      "text": "The acute illnesses included nausea, vomiting, diarrhoea, dizziness and fatigue, together with suppression of bone marrow function and localized radiation injuries. These were overlapping but distinct consequences: severe exposure of a hand or another small area did not necessarily indicate an equally severe whole-body dose. Superficial beta irradiation produced reddening, swelling, blistering and skin loss, while penetrating gamma radiation injured deeper tissues. The IAEA documented 28 people with radiation burns across the affected population, not merely among those admitted to hospital. (www-pub.iaea.org)\n\nMedical triage at Goiânia’s Olympic Stadium identified 20 people requiring hospital treatment. Fourteen were subsequently admitted to the Marcílio Dias Naval Hospital in Rio de Janeiro; six remained at Goiânia General Hospital. This hospitalized group was only part of the population receiving care: the Goiás health department records 79 people treated as outpatients for external contamination and another 30 internally contaminated people accommodated in hostels under semi-isolation. The figure of 14 transferred for specialist treatment therefore should not be read as the total number treated. Cytogenetic dose estimates helped distinguish patients needing intensive medical care from those less severely exposed. (iaea.org)\n\nTreatment addressed both radiation injury and the continuing presence of radioactive material. Removing contaminated clothing and washing the skin reduced external contamination, although internally deposited caesium could recontaminate the skin through sweating. For patients with marrow depression, clinicians used repeated blood counts, protective isolation, antimicrobial treatment and transfusions of red cells and platelets. Care was adjusted to the clinical course rather than determined by dose estimates alone. Local injuries required separate assessment: one patient underwent amputation on 15 October 1987, and five others later required surgical debridement or a skin graft. (www-pub.iaea.org)\n\nPrussian blue was administered to promote the removal, or decorporation, of internal caesium, including in patients at both principal hospitals. This addressed a different problem from washing contamination off the skin. The compound binds caesium in the gastrointestinal tract, including caesium secreted into the intestine through bile, reducing its reabsorption and increasing elimination in faeces. It thereby shortens the time radioactive caesium remains in the body rather than changing its physical radioactive decay. Urine and faecal measurements and whole-body counting were used to follow internal contamination and assess the treatment’s effect. (iaea.org)\n\nFour patients died during the acute phase in October 1987: Maria Gabriela Ferreira and six-year-old Leide das Neves Ferreira on 23 October, Israel Batista dos Santos on 27 October, and Admilson Alves de Souza on 28 October. These are the four acute fatalities documented in the accident investigation, distinct from subsequent mortality among people enrolled in long-term follow-up. (radis.ensp.fiocruz.br) Post-mortem examinations identified haemorrhagic and septic complications associated with acute radiation syndrome. Cytogenetic estimates of the four patients’ whole-body doses ranged from approximately 4.5 Gy to more than 6 Gy; two other patients with similarly high estimated doses survived. (iaea.org)"
    },
    {
      "heading": "Environmental surveys and urban decontamination",
      "text": "Environmental investigations combined interviews with radiation measurements to trace the movement of radioactive material rather than treating Goiânia as uniformly contaminated. Hospital patients and residents of affected houses were questioned about their movements and visitors. Initial surveys on foot identified seven principal contamination sites, including scrap yards. Helicopter surveys on 7–8 October 1987 covered approximately 67 square kilometres of urban area, checking whether major contaminated locations had escaped detection. Vehicle-mounted detectors subsequently examined streets and areas around known hotspots, while handheld instruments provided more localized measurements. These complementary surveys distinguished concentrated deposits from surrounding areas with much lower readings. (iaea.org)\n\nContamination affected buildings, household belongings, soil, paved surfaces and vehicles; approximately 50 vehicles were found contaminated. Rain complicated the distribution of caesium: instead of simply washing it away, it helped deposit radioactive material on roofs, which became important sources of irradiation inside houses. A laboratory established in Goiânia analysed soil, sediment, river water, drinking water, groundwater, air and foodstuffs. Drinking-water contamination was reported as very low, and detectable groundwater contamination was confined to a few wells near the principal sites. These localized findings did not establish contamination of the city’s water supply as a whole. (www-pub.iaea.org)\n\nMajor clearance began in mid-November 1987. Seven residences were demolished because their contamination made decontamination impracticable. Heavy machinery removed rubble and contaminated soil from gardens and yards; the cleared ground was subsequently covered with concrete or clean soil. In less contaminated locations, surface deposits could be removed without demolishing buildings. Of 159 houses monitored in the programme described by the IAEA, 42 required decontamination. Indoor vacuum cleaning, outdoor washing with high-pressure water jets and chemical cleaning were selected according to the affected material and the degree of contamination. (www-pub.iaea.org)\n\nDetailed ground surveys used a one-metre grid for dose-rate measurements and soil sampling. Much of the contamination in less affected ground remained within the upper 1.5 centimetres, allowing removal of the surface layer and replacement with clean topsoil. Industrial vacuum cleaners fitted with high-efficiency particulate filters collected contaminated indoor dust. Roof washing proved insufficiently effective in some cases, requiring replacement of the roofing rather than repeated cleaning. Measurements after removal determined whether further work was necessary. (iaea.org)\n\nWorker protection depended on individual dosimetry and controlled exposure times. Film badges recorded accumulated occupational exposure, while quartz-fibre pocket dosimeters supported daily dose control. Operational limits were set at 1.5 millisieverts per day, 5 per week, 15 per month and 30 per quarter. Work at the most contaminated residence required particularly short periods at hotspots and careful planning; heavy rain complicated the mechanical transfer of contaminated mud into containers. Dosimeter checks, protective clothing and restricted working periods accompanied the clearance operations. These were limits and arrangements adopted for the historical response, not measurements of the doses received by nearby residents. (iaea.org)"
    },
    {
      "heading": "Radioactive waste and the Abadia de Goiás repository",
      "text": "The cleanup produced radioactive waste consisting principally of excavated soil, demolition rubble, contaminated household belongings, and materials used in decontamination. Goiás health authorities report a total volume of approximately 3,500 cubic metres. This is distinct from the approximately 6,000 tonnes reported by Brazil’s National Nuclear Energy Commission (CNEN): cubic metres measure volume, whereas tonnes measure mass. These totals describe the bulk contaminated material requiring management, not the quantity of caesium-137 itself. The waste was transferred to Abadia de Goiás, roughly 20–25 kilometres from Goiânia, where temporary storage was subsequently replaced by permanent disposal facilities. (goias.gov.br)\n\nPackaging depended on the material’s physical form and measured radiation levels. Most lower-level waste went into steel drums or metal boxes with sealed lids; smaller drums could be enclosed within larger packages. More strongly radioactive material received additional reinforced-concrete shielding, while liquid waste was solidified in cement. Records identified each consignment’s origin, physical characteristics, and external dose rate. Transport to temporary storage began in October 1987. Packages were initially placed on outdoor concrete platforms rather than buried immediately. The site had been selected amid political disagreement over where the waste should remain, and the original arrangement envisaged storage for up to two years while a permanent repository was considered. Residents of Abadia protested against receiving it, expressing fears about health, economic losses, discrimination, and the proximity of radioactive material to their community. (www-pub.iaea.org)\n\nThe permanent complex was constructed at the temporary-storage site during 1991–1996 and inaugurated on 5 June 1997. Its two large concrete disposal structures enclosed the packaged waste within engineered barriers. Successive covering layers provided directed drainage to reduce contact between rainwater and the repository, and external resin- and bitumen-based insulation added protection against water penetration. The covered structures consequently resembled low elevations in the landscape rather than exposed stacks of drums. CNEN describes the containment design as intended to retain the waste for 300 years or more. This period accommodates the substantial reduction in caesium-137 activity through radioactive decay; it does not mean that all radioactivity disappears at a precise 300-year boundary. (memoria.cnen.gov.br)\n\nPermanent disposal did not end institutional responsibility. The Centro Regional de Ciências Nucleares do Centro-Oeste (CRCN-CO), located within Parque Estadual Telma Ortegal, undertakes repository control and environmental surveillance. CNEN’s September 2026 description of the monitoring programme specifies quarterly collection of surrounding soil, vegetation, sediment, surface water, and groundwater. Laboratory gamma spectrometry measures caesium-137 activity concentrations in these samples, while thermoluminescent dosimeters record environmental radiation. Annual reports are supplied to environmental-control and oversight bodies. These measurements assess the repository’s surroundings and the continued effectiveness of containment, separately from the physical isolation provided by its concrete structures and protective covering. (gov.br)\n\nA separate programme follows the remediated accident locations within Goiânia. Begun in 1988, it checks the condition of those sites, measures gamma dose rates, and analyses soil and vegetation for caesium-137. In the programme described in 2026, visual inspections were conducted every two months and dose-rate measurements every six months. Although CRCN-CO carries out both programmes, their objects differ: repository monitoring concerns the engineered facility holding removed waste, whereas urban monitoring concerns former contamination sites and their surroundings after remediation. (gov.br)"
    },
    {
      "heading": "Social disruption, stigma, and public memory",
      "text": "Fear of radiation generated demand for screening far beyond the population found to be contaminated. In the weeks after the source was identified, more than 112,000 people—approximately 11% of Goiânia’s population—sought evaluation, whereas 249 were identified as contaminated. A Centers for Disease Control and Prevention training account reports that 74% of those monitored had spontaneously sought examination because of fear of radiation, and that many displayed extreme anxiety. These figures distinguish the scale of public alarm from the number with demonstrable contamination; attendance at screening was not itself evidence of radiation exposure or injury. (orau.gov)\n\nStigma extended beyond patients to people identified simply as residents of Goiânia. Historian Cristina Helou Gomide recalled encountering discomfort when she disclosed her home city during a visit to São Paulo two months after the accident. A particularly visible expression of rejection occurred at the burial of six-year-old Leide das Neves Ferreira. The Goiás health department’s photographic history records that more than 2,000 people, fearing contamination of the cemetery, attempted to obstruct the burial with stones and bricks. Her mother, Lourdes das Neves Ferreira, attended while Leide’s father remained hospitalized in Rio de Janeiro; the account describes Sônia Santillo’s intervention to enable the mother to approach the coffin. (files.cercomp.ufg.br)\n\nDisruption to trade persisted even after restrictions were lifted. In a 2022 retrospective published by the Goiás Legislative Assembly, merchant Jair Onofre do Prado described the closure of the Mercado Popular da 74 near Rua 57. Its shops were allowed to reopen after the market’s interior was found uncontaminated, but customers continued to stay away, and businesses subsequently closed. Prado also recalled evacuating his nearby apartment and later selling it for approximately one-quarter of its market value. This percentage was his retrospective account of an individual property transaction, not a measured citywide decline in property prices or a comprehensive estimate of economic losses. (portal.al.go.leg.br)\n\nDisplacement and the loss of possessions were consequences distinct from radiation injury. Already-decontaminated residents who could not return home were accommodated at the Albergue Bom Samaritano while their houses awaited recovery. Contaminated homes, vehicles and personal belongings entered the waste stream, removing both useful property and material connections with family life. Psychologists Suzana Helou and Sebastião Benício da Costa Neto described disrupted relationships, loss of personal objects and fear of rejection among hospitalized or sheltered residents. Their account records the establishment of psychological and social-assistance centres on Rua 57 for people living or working near contamination sites, making mental health and social support part of the emergency response rather than merely an adjunct to treatment of physical injuries. (files.cercomp.ufg.br)\n\nLeide’s image and name became recurring elements of public remembrance. The Goiás health department’s 2024 bilingual photographic history reproduces her portrait alongside a poem written by her father, Ivo, dated 22 July 1988, preserving a family expression of mourning within an official account. Institutional collections also retain photographs of the emergency and its aftermath: the Federal Public Prosecutor’s Office provides access to period images belonging to the regional nuclear-science centre. Its thirtieth-anniversary programme included the event “Césio 137: 30 anos do acidente em Goiânia—Memórias e Reflexões” on 12 September 2017, a painting exhibition, and an exhibition of scientific and cultural work held from 12 September to 12 October 2017. (goias.gov.br)"
    },
    {
      "heading": "Long-term health follow-up and victims’ rights",
      "text": "The Fundação Leide das Neves Ferreira (FUNLEIDE) was established by Goiás state decree on 11 February 1988, following legislative authorization in December 1987. Its responsibilities included medical and social assistance to people directly and indirectly affected, epidemiological studies, and research into radiation exposure. Follow-up groups were defined according to radiation injuries and the extent of internal and external contamination, rather than residence in Goiânia alone. In 1999, FUNLEIDE’s responsibilities passed to the Superintendência Leide das Neves Ferreira (SULEIDE); a further reorganization in 2011 transferred them to the Centro Estadual de Assistência aos Radioacidentados Leide das Neves (CARA). (goias.gov.br)\n\nCARA developed into a multidisciplinary outpatient service providing medical, nursing, dental, psychological and social-work care. Goiás’s 2024–2027 health plan described monitoring through appointments, active outreach and patient-initiated visits, with attendance at least annually and records entered into the Sistema de Monitoramento dos Radioacidentados (SISRAD). Its registered population includes people admitted through administrative or judicial decisions, so it is not equivalent to the 249 people identified with contamination during the original emergency. A 2025 healthcare agreement also covered recognized victims and descendants through the third generation. These are categories of healthcare eligibility, not counts of people whose radiation injury has been demonstrated. (goias.gov.br)\n\nLong-term health surveillance must distinguish an illness diagnosed after exposure from an illness attributable to it. A 2019 study by Maria Paula Curado and colleagues followed 102 people in exposure groups I and II and identified seven cancers in six patients during 1988–2017. Compared with Goiânia’s population, the incidence-rate ratios were 1.5 for men and 0.6 for women, with wide 95% confidence intervals of 0.4–5.9 and 0.1–3.8 respectively; neither difference was statistically significant. These estimates do not establish the absence of an effect. Interpretation requires attention to individual dose estimates and confounding factors, including age, smoking and alcohol consumption; the authors identified their inability to associate individual cancers with risk factors as a limitation. Monitoring descendants, or extending healthcare rights to them, likewise does not itself demonstrate inherited injury. (periodicos.unichristus.edu.br)\n\nCivil litigation established obligations distinct from clinical findings. Federal and state prosecutors filed a public civil action on 1 September 1995 seeking compensation and continuing assistance. On 17 March 2000, the federal court ordered the National Nuclear Energy Commission (CNEN) to pay R$1 million to the Fund for the Defence of Diffuse Rights and guarantee medical, hospital, dental and psychological assistance to recognized direct and indirect victims through the third generation. The judgment also required cancer notification and support for continuing epidemiological monitoring. On 30 August 2002, the Federal Regional Court of the First Region gave immediate enforceability to the portion concerning CNEN while the appeal proceedings continued. The payment to the collective-rights fund was separate from individual pensions. (mpf.mp.br)\n\nFederal Law No. 9,425 of 24 December 1996 created a lifetime special pension, personal to the beneficiary and not transferable to surviving spouses or heirs. Its original schedule specified 300 fiscal reference units (UFIR) for permanent partial or total occupational incapacity, 200 UFIR for exposure of at least 100 rad, and 150 UFIR for several other qualifying categories. Eligibility required examination by an official medical board; the law also provided a conditional category for descendants born with abnormalities attributable to documented parental exposure. Pension administration remained contested: an interim ruling on 15 March 2004 required that payments not fall below the minimum wage. In a separate action filed on 19 March 2010, prosecutors challenged assessment delays and shortages of specialist physicians, requesting adequate staffing and psychiatric expertise. Those requests were claims for relief, not evidence that every applicant qualified for benefits. (planalto.gov.br)"
    },
    {
      "heading": "International significance for radioactive-source safety",
      "text": "The abandoned teletherapy unit became an orphan source: a radioactive source outside regulatory control because it had been abandoned, lost, stolen or transferred without authorization. The designation concerns control, not whether its owner can be identified. The International Atomic Energy Agency (IAEA) subsequently used Goiânia as a case study in guidance on recovering orphan sources, identifying the teletherapy source as Category 1, the highest hazard category in its source-categorization system. The case demonstrated that equipment formerly used within licensed radiotherapy could become a public hazard after clinical use ceased. (nucleus.iaea.org)\n\nThe IAEA’s 1988 review emphasized that regulatory oversight did not replace the responsibility of the person or organization controlling a source. Relocation or closure required continued accountability, verification of the source’s whereabouts and effective physical security—not merely leaving an unused machine inside its former treatment room. Its recommendations included clear, enforceable requirements and communication between users and authorities. Later guidance used Goiânia to illustrate a specific inspection gap: responsibility for inspecting medical facilities had passed from Brazil’s federal health ministry to state health secretariats in January 1976, with uneven implementation. It recorded that routine source reporting by licensees was introduced after the accident. Source inventories and inspections thus served complementary functions: records established what should be present, while verification could reveal abandonment or unauthorized movement. (iaea.org)\n\nRecognition of radiation warnings was another distinct lesson. The 1988 review called for hazard markings recognizable beyond the specialist community and education enabling health professionals and other workers to recognize radiation injuries. It also stressed that source chemistry mattered to accident consequences: breaching the Goiânia capsule released soluble, readily dispersible caesium chloride rather than leaving the hazard confined to irradiation from an intact capsule. Emergency planning therefore had to encompass source accidents in ordinary urban settings, not only emergencies at nuclear installations. These recommendations were presented as general safety lessons, not as substitutes for determining responsibility in the particular accident. (iaea.org)\n\nFor metal recycling, Goiânia showed that serious exposure and contamination could occur during collection and informal dismantling, before scrap reached a furnace. International guidance consequently addresses both recognition of suspicious devices and instrumental detection. The IAEA’s 2012 safety guide SSG-17 covers routine monitoring, portal monitors, alarm investigation, personnel training, responses to intact or ruptured sources, and subsequent management of recovered material. Detection has limits: shielding by a scrap load can conceal a source, so a negative measurement does not establish that every object is non-radioactive. The guidance also addresses financing recovery and remediation, linking detection to arrangements for restoring control rather than simply identifying unwanted material. (www-pub.iaea.org)\n\nThe closest earlier parallel was Ciudad Juárez in 1983, where a disused cobalt-60 teletherapy unit entered the scrap trade. Its source was ruptured, pellets escaped, and radioactive material reached a foundry; contaminated products were discovered after a shipment triggered radiation alarms at Los Alamos in the United States. Both accidents followed loss of institutional control and recovery for scrap value. Their dispersal pathways differed: Juárez spread cobalt through metal processing, whereas Goiânia’s caesium chloride spread chiefly through handling and movement between premises, producing substantial internal as well as external contamination. Neither event involved a reactor-core failure; the initiating hazard was an already radioactive medical source removed from its protective and administrative controls. (nucleus.iaea.org)"
    }
  ],
  "links": [
    "brazil",
    "radiation-therapy",
    "public-health",
    "half-life",
    "beta-decay",
    "gamma-ray",
    "radioactivity",
    "cytogenetics",
    "chromosome",
    "calibration",
    "bone-marrow",
    "complete-blood-count",
    "groundwater",
    "trade",
    "mental-health",
    "epidemiology",
    "public-health-surveillance",
    "confounding",
    "recycling"
  ],
  "sources": [
    {
      "title": "The Radiological Accident in Goiânia",
      "url": "https://www-pub.iaea.org/MTCD/Publications/PDF/Pub815_web.pdf"
    },
    {
      "title": "Arrangements for the Termination of a Nuclear or Radiological Emergency",
      "url": "https://www-pub.iaea.org/MTCD/Publications/PDF/PUB1796_web.pdf"
    },
    {
      "title": "Césio-137 — Ministério Público Federal",
      "url": "https://www.mpf.mp.br/atuacao/grandes-casos/casos-historicos/cesio-137"
    },
    {
      "title": "The radiological accident in Goiânia",
      "url": "https://www.iaea.org/sites/default/files/publications/magazines/bulletin/bull30-4/30402781017.pdf"
    },
    {
      "title": "EPA Facts About Cesium-137",
      "url": "https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P101C3VH.TXT"
    },
    {
      "title": "Radionuclide Basics: Cesium-137",
      "url": "https://www.epa.gov/radiation/radionuclide-basics-cesium-137"
    },
    {
      "title": "Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards",
      "url": "https://nucleus.iaea.org/sites/nss-oui/Published%20Collections/m_3761d926-c16f-4477-a63b-741a9db1c16c/m_3761d926-c16f-4477-a63b-741a9db1c16c__50_0.Html"
    },
    {
      "title": "Psychological First Aid in Radiation Disasters",
      "url": "https://www.orau.gov/rsb/pfaird/02-overview-03-example.html"
    },
    {
      "title": "Césio 137 — 37 anos",
      "url": "https://goias.gov.br/saude/wp-content/uploads/sites/34/files/CARA/livro-cesio-37-anos.pdf"
    },
    {
      "title": "The fate of chromosomal aberrations in 137Cs-exposed individuals in the Goiânia radiation accident",
      "url": "https://pubmed.ncbi.nlm.nih.gov/1983985/"
    },
    {
      "title": "Conventional radiation-biological dosimetry using frequencies of unstable chromosome aberrations",
      "url": "https://pubmed.ncbi.nlm.nih.gov/9729305/"
    },
    {
      "title": "Medical aspects of 137Cs decorporation: the Goiânia radiological accident",
      "url": "https://pubmed.ncbi.nlm.nih.gov/1983984/"
    },
    {
      "title": "IAEA-TECDOC-1131",
      "url": "https://www-pub.iaea.org/MTCD/Publications/PDF/te_1131_prn.pdf"
    },
    {
      "title": "História do Césio 137 em Goiânia – Saúde",
      "url": "https://goias.gov.br/saude/historia-do-cesio-137-em-goiania/"
    },
    {
      "title": "Radiogardase prescribing information",
      "url": "https://www.accessdata.fda.gov/drugsatfda_docs/label/2014/021626s010lbl.pdf"
    },
    {
      "title": "Como aconteceu o acidente do césio-137 em Goiânia – Radis Comunicação e Saúde",
      "url": "https://radis.ensp.fiocruz.br/reportagem/cesio-137/como-aconteceu-o-acidente-do-cesio-137-em-goiania/"
    },
    {
      "title": "Radiological Accidents – Goiânia Accident: Lessons Learnt from Occupational Radiation Protection in Past Accidents",
      "url": "https://www.iaea.org/sites/default/files/21/12/9-d_radiological_accidents_goiania_accident.pdf"
    },
    {
      "title": "Perguntas Frequentes — Comissão Nacional de Energia Nuclear",
      "url": "https://www.gov.br/cnen/pt-br/acesso-a-informacao/copy_of_perguntas-frequentes"
    },
    {
      "title": "Césio 137 — 25 anos",
      "url": "https://goias.gov.br/saude/wp-content/uploads/sites/34/2016/12/revista-cesio-25-anos-60e.pdf"
    },
    {
      "title": "Biblioteca Digital Memória da CNEN — CRCN-CO",
      "url": "https://memoria.cnen.gov.br/memoria/CronologiaUnidade.asp?Unidade=CRCN-CO"
    },
    {
      "title": "Monitoramento contínuo da CNEN comprova ausência de risco radiológico para a população em Goiânia",
      "url": "https://www.gov.br/ien/pt-br/assuntos/noticias/monitoramento-continuo-da-cnen-comprova-ausencia-de-risco-radiologico-para-a-populacao-em-goiania"
    },
    {
      "title": "Psychological First Aid in Radiation Disasters: Overview—Example",
      "url": "https://orau.gov/rsb/pfaird/02-overview-03-example.html"
    },
    {
      "title": "Césio-137: consequências psicossociais do acidente de Goiânia",
      "url": "https://files.cercomp.ufg.br/weby/up/1249/o/cesio_137_2ed.pdf"
    },
    {
      "title": "Especial césio-137 – IV",
      "url": "https://portal.al.go.leg.br/noticias/127530/especial-cesio-137-iv"
    },
    {
      "title": "Galeria de fotos — Ministério Público Federal",
      "url": "https://www.mpf.mp.br/atuacao/grandes-casos/casos-historicos/cesio-137/galeria-de-fotos"
    },
    {
      "title": "CARA – Centro Estadual de Assistência aos Radioacidentados Leide das Neves",
      "url": "https://goias.gov.br/saude/cara/"
    },
    {
      "title": "Planejamento Estratégico 2024–2027",
      "url": "https://goias.gov.br/saude/wp-content/uploads/sites/34/files/acesso_a_informacao/prestacao-de-contas/plano-estrategico-2024-2027.pdf"
    },
    {
      "title": "Convênio Nº 09/2025 – IPASGO Saúde",
      "url": "https://goias.gov.br/saude/wp-content/uploads/sites/34/acesso_a_informacao/convenios/concedidos/2025/Conv%C3%AAnio%20N%C2%BA%2009-2025%20-%20202300010049513%20-%20IPASGO%20SA%C3%9ADE.pdf"
    },
    {
      "title": "Cancer incidence in the cohort exposed to Cesium-137 accident in Goiânia (Brazil) in 1987",
      "url": "https://periodicos.unichristus.edu.br/jhbs/article/view/2429/0"
    },
    {
      "title": "Cancer incidence in the cohort exposed to Cesium-137 accident in Goiânia (Brazil) in 1987 — full text",
      "url": "https://periodicos.unichristus.edu.br/jhbs/article/download/2429/866/9849"
    },
    {
      "title": "Ações civis públicas",
      "url": "https://www.mpf.mp.br/atuacao/grandes-casos/casos-historicos/cesio-137/acoes-civis-publicas"
    },
    {
      "title": "Linha do tempo",
      "url": "https://www.mpf.mp.br/atuacao/grandes-casos/casos-historicos/cesio-137/linha-do-tempo"
    },
    {
      "title": "Lei nº 9.425, de 24 de dezembro de 1996",
      "url": "https://www.planalto.gov.br/ccivil_03/leis/l9425.htm"
    },
    {
      "title": "National Strategy for Regaining Control over Orphan Sources and Improving Control over Vulnerable Sources",
      "url": "https://nucleus.iaea.org/sites/nss-oui/Published%20Collections/m_cf69469a-99ce-4443-b225-f8abf10cdff3/m_cf69469a-99ce-4443-b225-f8abf10cdff3__13_0.Html"
    },
    {
      "title": "Control of Orphan Sources and Other Radioactive Material in the Metal Recycling and Production Industries",
      "url": "https://nucleus.iaea.org/sites/nss-oui/Published%20Collections/m_8a146349-13c5-48c4-b4db-fb29716642dd/m_8a146349-13c5-48c4-b4db-fb29716642dd__10_0.Html"
    }
  ],
  "license": "https://creativecommons.org/licenses/by/4.0/"
}