This publication offers a year-by-year overview of the major events related to the release of radioactive materials from Hanford, the public's awareness of these emissions and related studies. The timeline was developed in response to questions concerning what happened, and when events took place over the course of Hanford's more than 50 years of history. Following the timeline are lists of abbreviations for agency and project names, and of selected resources for additional reading.
1943
January:
The U.S. government's wartime program to develop the atomic bomb, known as the Manhattan Project (U.S. Army Corps of Engineers), selected the Hanford site in southeast Washington state as the location for its plutonium production operations.
February:
A federal court condemned more than 600 square miles of land under the War Powers Act. The area included the towns of Richland, Hanford and White Bluffs. More than 1,500 residents were ordered to leave within 30 days.
1944
September:
Hanford began making plutonium for atomic bombs when B reactor started operating. Radioactive contamination, the by-product of plutonium production, began to be released into the river.
December:
Major releases of radioactive materials to the air and soil began.
1945
July:
The first atomic bomb was tested at Alamogordo, New Mexico, using plutonium produced at hanford.
August:
Bombs were dropped on Hiroshima and Nagasaki, killing over 70,000 people in Nagasaki alone. The Nagasaki bomb contained plutonium produced at Hanford.
By December:
Hanford's plutonium plants released about 560,000 curies of iodine-131 during 1945.
1946
General Electric replaced E. I. du Pont as the general contractor responsible for managing the Hanford site.
The U.S. Congress passed the Atomic Energy Act which made Hanford a civilian operation allowing the Atomic Energy Commission (AEC) and, later, the United States Department of Energy (USDOE), to operate weapons material production plants without independent oversight.
1947-1956
Ten-year expansion of the Hanford site began, including construction of five new plutonium production reactors, two chemical reprocessing plants and 81 underground waste storage tanks.
1948
Filters were placed for the first time on the stacks of the separations plants (where plutonium and uranium were separated from irradiated fuel through a chemical process). The filters helped reduce the amount of radioactive materials released from Hanford.
October:
The dike of a waste pond broke and spilled an estimated 28 pounds of uranium into the Columbia River.
1949
August:
The Soviet Union detonated its first atomic bomb.
December:
The Green Run occurred on December 2-3 at Hanford. It was a planned, top secret release of approximately 8,000 curies of iodine-131. It was the largest single release from Hanford.
1951-1968
In January 1951, the United States started domestic atomic bomb testing at the Nevada Test Site, using plutonium and other materials produced at Hanford. From January 1951 through October 1958, a total of 119 tests were conducted, most of them above-ground. A few above-ground, surface or near-surface tests were also conducted between 1962 and 1968. Fallout from the atmospheric tests released approximately 150 million curies of iodine-131, with peaks in 1953, 1955 and 1957.
1951
To July:
Special iodine filters on Hanford's processing plants began to fail. Before they were replaced in July, about 23,000 curies of iodine-131 were secretly released over Eastern Washington during the height of the agricultural growing season. In the 1990s, the Hanford Environmental Dose Reconstruction (HEDR) Project estimated that 34,360 curies were released in 1951. Scientists serving as experts in downwinder litigation have calculated that the releases may have been as high as 92,100 curies in 1951.
1953
July-September:
Nearly 250 curies of ruthenium-103 and ruthenium-106 were released at Hanford because of processing problems.
1954
The U.S. Congress passed the Atomic Energy Act of 1954, a revision of the 1946 Atomic Energy Act. This bill allowed weapons material production plants to continue operating without independent oversight.
January:
Releases of over 300 curies of radioactive ruthenium-106 from Hanford's Redox (reduction-oxidation) plant occurred. Some of the ruthenium particles were detected in Spokane, Wash.
1955
The last two of Hanford's original eight reactors started operation. One of the K reactors experienced a partial fuel meltdown at startup.
March:
Approximately 200 curies of iodine-131 were released over two days.
1956
The PUREX (plutonium uranium extraction) separations plant began operation at Hanford.
Late 1950s to mid-1960s:
All of the original eight plutonium production reactors operated at their highest power levels during this time. As a result, contamination of the Columbia River was at its highest. Hanford's releases contaminated fish in the Columbia as well as Pacific oysters in coastal areas of Washington and Oregon.
1962
April:
A "criticality accident" (a self-sustaining nuclear reaction) at the Plutonium Finishing Plant released an estimated 1,200 curies of radioactive gases over three days. Three workers received high exposures inside the plant.
1963
President Kennedy attended the ground breaking for Hanford's ninth reactor (N-reactor) which was designed to produce plutonium and also electricity (from its excess steam).
September:
Short-cooled (green) nuclear fuel was accidentally processed. About 70 curies of iodine-131 were released.
1964
Isochem replaced General Electric as contractor for Hanford operations. General Electric remained responsible for the reactors, however. Also, Battelle took over responsibilities for environmental monitoring.
December:
President Johnson ordered the gradual shutdown of Hanford operations by closing three of Hanford's nine reactors. This prompted local officials to begin economic diversification efforts.
1968
Atlantic-Richfield (ARCO) replaced Isochem for Hanford operations and United Nuclear replaced General Electric for reactor operations.
1971
The AEC closed the last of Hanford's original eight reactors.
1972
The AEC closed the PUREX plant, the last of Hanford's four separations plants.
1973
May:
The Seattle Post-Intelligencer reported that 100 billion gallons of low-level liquid waste were discharged into the ground during 30 years of Hanford operations.
June:
Hanford officials announced that they detected a 115,000 gallon leak from nuclear waste tank 106-T.
1975
January:
The Seattle Post-Intelligencer published a story about an AEC report of at least 60 "unplanned" releases at Hanford, including the 1954 ruthenium-106 release. The story was based on a report frpm the federal Energy Research and Development Administration (publication number ERDA-1538), the first environmental impact statement on Hanford.
1977
Rockwell Hanford replaces ARCO as Hanford contractor.
1978
Stephen Stalos resigned as manager of Hanford's nuclear waste surveillance program charging that the USDOE covered up tank leaks and that the contractor, Rockwell Hanford, used lax safety practices.
1979
The Three Mile Island nuclear power plant had a partial core meltdown and developed a potentially explosive hydrogen bubble. Approximately 15 to 24 curies of radioactive iodine-131 were released to the air.
1982
Hanford became a possible location for a high-level nuclear waste repository authorized by the Nuclear Waste Policy Act of 1982.
1983
Fall:
The USDOE reopened the PUREX (plutonium uranium extraction) plant in the fall.
1984
January:
USDOE temporarily shut down the PUREX plant, stating initially that the plant was closed because of thorium emissions that exceeded standards. Later it was announced that plutonium emissions prompted the closure.
Spokane Unitarian minister, Bill Houff, delivered his "Silent Holocaust" sermon which led to the formation of Hanford Education Action League (HEAL) four months later. HEAL was a citizen-led, public interest, Hanford-watchdog organization. HEAL was active until 1999.
1985
The USDOE selected Hanford as one of three final candidates for a nuclear waste repository.
July
The Spokane Spokesman-Review published (on July 28) the first article about Hanford downwinders.
October:
At a public forum held to discuss citizen concerns about the potential health hazards from the radioactive releases, Michael Lawrence, Hanford's USDOE manager, announced that the USDOE would release summary information about Hanford's past emissions.
HEAL and the Spokane Physicians for Social Responsibility (PSR) sponsored a symposium, "Human Health and Hanford" on October 25-26. A few days later, the USDOE announced that the Department would release documents containing raw data about Hanford's radioactive emissions, in addition to the summary information.
December:
The Washington State Nuclear Waste Board passed a resolution calling for an independent health study of Hanford downwinders.
1986
January:
On January 30, HEAL and other groups filed a Freedom of Information Act request for documents to assure and evaluate the USDOE's release of documents already underway.
February:
On February 27, USDOE released 19,000 pages of Hanford Historical Documents which included reports of the radioactive releases. One report from 1974 estimated that Hanford released 441,700 curies of radioactive iodine-131 from 1944 through 1947.
March:
The governors of Washington and Oregon established the Hanford Historical Documents Review Committee. The Committee was asked to review the Hanford Historical Documents and make recommendations about their environmental significance.
April:
An accident at the Chernobyl nuclear power plant in the then-Soviet Union on April 26 released between 40 million and 50 million curies of iodine-131 into the atmosphere.
August:
The Federal Centers for Disease Control and Prevention (CDC) convened the Hanford Health Effects Review Panel to assess the need for studies of long-term health effects in populations exposed to the releases of radioactive materials from Hanford.
September:
The Hanford Health Effects Review Panel made 34 recommendations, which included the need for a dose reconstruction study and an epidemiological study of thyroid disease among people exposed to Hanford's releases.
The Hanford Historical Documents Review Committee, responsible for the follow-up of the Hanford Health Effects Review Panel recommendations, began to design a dose reconstruction study. The USDOE began to design its own study in response to a lawsuit brought by members of the Colville Indian Tribe, and the possibility of other lawsuits. The Colville lawsuit claimed that specific health effects resulted from past Hanford operations.
1987
January:
N-Reactor operations were stopped for safety improvements.
The Hanford Historical Documents Review Committee and the USDOE agreed to conduct one dose reconstruction study instead of two separate studies. It was decided that the USDOE would fund the HEDR HEDR Project and other "feasible and reasonable" health studies. Later, USDOE cut funds to the Documents Review Committee and directed its long-time Hanford contractor, Battelle, to start work on HEDR.
Westinghouse Hanford replaced Rockwell and UNC as main Hanford Contractor.
December:
Hanford was removed from consideration as a site for the high-level nuclear waste repository.
1988
The USDOE issued an order to shut down the N-Reactor.
May:
The Technical Steering Panel (TSP), a panel of scientists which directed the HEDR Project, was appointed and held its first meeting.
Congress mandated funding for the Hanford Thyroid Disease Study (HTDS) through the CDC.
1989
The USDOE, the Environmental Protection Agency, and the Washington State Department of Ecology signed an agreement about the cleanup of Hanford.
July:
HEAL revealed that the PUREX (plutonium uranium extraction) plant had been closed eight months earlier without public notice. Except for a brief stabilization run in 1990, the PUREX plant never resumed operation.
September:
The HTDS began to develop a detailed study plan, or protocol.
1990
Faced with impending disclosure, a Hanford official announced the possibility of a hydrogen explosion in Tank 101-SY. HEAL revealed that Hanford scientists had known since 1979 that potentially explosive concentrations of hydrogen had been building up within 101-SY.
April:
A draft protocol for the HTDS was made available for public review and comment.
July:
The TSP announced preliminary results from the HEDR Project. These results indicated that more than 13,000 people could have received potentially harmful doses of iodine-131 from Hanford's releases of radioactive materials.
September:
The U.S. Congress appropriated $5 million for the states of Idaho, Oregon and Washington to provide information about the Hanford releases and the health effects of radiation to health care providers and citizens who were exposed to radiation from Hanford. This program became known as the Hanford Health Information Network (HHIN).
December:
The USDOE and the Department of Health and Human Services (DHHS) signed a Memorandum of Understanding that established new procedures for the management of federal research on the health effects of radiation and other toxic materials that workers and the public are exposed to as a result of USDOE nuclear operations.
1991
July:
The HTDS protocol was formally approved by the CDC. Data collection began in the fall by the Fred Hutchinson Cancer Research Center, CDC contractor for the thyroid study.
Government investigations and press accounts corroborated the safety concerns and harassment charges of Westinghouse Hanford Company workers who blew the whistle on dangerous situations at Hanford.
1992
May:
The HTDS protocol received approval by the federal Office of Management and Budget. This completed the approval process for the study.
June:
The CDC established a contract with Battelle, officially transferring the HEDR Project from the USDOE to the DHHS.
October:
The HEDR Project announced a revised estimate that 685,000 curies of radioactive iodine-131 were released from Hanford between 1944 and 1947. This represented a 70 percent increase from the original estimate. The new estimate was based on information contained in USDOE documents declassified during the last two years.
1993
April:
The HHIN toll-free information lines opened to the public.
1994
April:
The TSP of the HEDR Project released a second set of dose estimates for representative individuals. In comparison to the 1990 dose estimates, these were lower for people living close to Hanford and higher for people living further downwind. Doses were also calculated for a larger geographic area.
September:
HHIN hosted a major conference on the health effects of radiation. Scientists, health care providers, downwinders and interested citizens met in Spokane, Wash., for this two-day conference which featured 30 sessions and 55 speakers.
The Agency for Toxic Substances and Disease Registry (ATSDR) and the CDC established the Hanford Health Effects Subcommittee (HHES) to advise the two federal agencies on health-related research and public health activities around Hanford.
HHIN was re-authorized by Congress to continue its work through October 1997.
November:
A committee of the National Research Council completed review of the HTDS pilot phase at the request of the CDC and recommended that the study be completed.
1995
The Fred Hutchinson Cancer Research Center completed the pilot phase of the HTDS. Since the pilot phase established that the study was feasible, the full study phase began.
A committee of the National Research Council completed review of selected HEDR Project documents at the request of the CDC. The committee had both favorable comments and criticisms about these reports.
The state health agencies of Idaho, Oregon and Washington and the CDC formed the Individual Dose Assessment (IDA) Project to use the calculations based on HEDR's computer system to calculate individual radiation dose estimates for people who lived or spent time in the HEDR study area. The Project began work on technical issues and to develop and test the necessary computer systems and explanatory materials. (It was determined later that individual dose estimares could be provided for iodine-131 releases to the atmosphere.)
October:
The federal Advisory Committee on Human Radiation Experiments released its final report. While focusing primarily on human radiation experiments, the committee also examined intentional releases of radiation into the environment, including the Green Run at Hanford.
December:
The TSP completed its role in the HEDR Project.
1996
January: A HEDR Task Completion Working Group, including representatives of Idaho, Oregon and Washington, was formed to work with CDC to continue public participation and assure completion of the remaining HEDR activities.
July:
The Hanford Health Information Archives opened its doors to the public. Located at Gonzaga University's Foley Center Library in Spokane, Wash., the Archives is a public collection of health information and personal records donated by people who lived or spent time in the area exposed to Hanford's releases of radioactive materials between 1944 and 1972. The Archives also launched an
Internet site to make its Catalog of Collections and Health Information Database readily available to the public.
Fluor Daniel and five other companies replace Westinghouse as Hanford contractors.
Fall:
Two projects funded by the USDOE to evaluate the health status of former Hanford workers began. The two are among six pilot projects developing plans for medical screening programs for former workers at USDOE nuclear sites.
November:
HHIN launched an expanded Internet site to make all HHIN publications available online.
1997
HHIN produced its first Spanish-language publication and added a toll-free line staffed by a bicultural, bilingual health educator.
The USDOE launched an Internet site offering federal government historical documents about human radiation experiments and research. These were documents located for review by the Advisory Committee on Human Radiation Experiments, which had published its final report in October 1995.
March:
The ATSDR determined that a medical monitoring program is needed for people who were exposed as children to Hanford's past radioactive releases. The agency determined that past iodine-131 exposure from Hanford met the agency's criteria for medical monitoring. The ATSDR recommended that the Hanford Medical Monitoring Program be a comprehensive program of education and informed decision-making centered on medical screening for thyroid and parathyroid diseases. Funding for the program would need to come from the USDOE.
The ATSDR also began tracing individuals who may be eligible to participate in an Iodine-131 Subregistry. The Iodine-131 Subregistry is to include people who were born in Adams, Benton or Franklin county between 1940 and 1951, or who were under age 6 between 1945 and 1951 and lived more than 30 days within those three counties in those years. The subregistry, part of the ATSDR's National Exposure Registry, will follow these individuals over time to collect information on many different health conditions. ATSDR cannot take further steps until funding is received for the subregistry from USDOE.
June:
SENES Oak Ridge, under a contract with ATSDR, prepared an estimation of health risks from Hanford's releases into the Columbia River. The researchers reviewed the HEDR Project's work and adjusted HEDR's representative doses for the maximally exposed person, whose diet included fresh fish and waterfowl. SENES concluded that the risk to such persons for several kinds of cancer would have been comparable to the risk for thyroid cancer considered as a qualification for ATSDR's Hanford Medical Monitoring Program.
After reviewing HEDR's work on Columbia River exposures for use in the Hanford IDA Project, CDC concluded that additional technical work needed to be done before dose estimates could be provided for people exposed to Hanford's radioactive releases to the river.
August:
On August 1, the National Cancer Institute (NCI) announced results from its nationwide study of iodine-131 fallout from nuclear bomb tests at the Nevada Test Site in the 1950s and 1960s. The study concluded that fallout spread across the country, resulting in a radiation dose from iodine-131 to residents in the 48 contiguous states. The doses were estimated to be highest for people who were young children during the 1950s, who drank milk, and who lived to the north or east of the Nevada Test Site, especially in parts of Montana and Idaho. As a review of the NCI study, the National Academy of Sciences (NAS) and Institute of Medicine (IOM) undertook an assessment of the public health and medical implications.
CDC held a technical workshop on issues related to calculating doses for iodine-131 released to the air. The public was invited to attend.
Members of the Hanford Health Information Archives Advisory Board established a separate nonprofit organization, the Radiation Health Effects Archives (RHEA). The purposes of RHEA are to secure funding to continue the Archives after the close of HHIN, and to expand the Archives to include personal and health histories from people exposed to radiation around the nation and the world.
Fall:
HHIN (which was scheduled to sunset on October 31) learned that the USDOE had approved its request for extension to operate for the 1997-98 fiscal year. However, HHIN's budget was reduced by more than 40 percent from the prior year. As a result, HHIN scaled back its programs and reduced its staff during the next year.
The HEDR Task Completion Working Group received final reports on two of the remaining tasks to complete the HEDR Project's work. One task was a survey of milk producers in seven counties near Hanford about the cow feeding regimes and distribution of milk to stores and homes. The other task was a scoping study regarding migrant farm workers who worked seasonally in the Hanford region during 1944 through 1951. This was an initial investigation into the demographics, seasonality and lifestyle patterns of these workers.
December:
After reviewing experts' comments from the August technical workshop on iodine-131 dose-related issues, CDC sent a request to the NAS to review and address several specific issues about validation of the HEDR dose model for the iodine-131 air pathway.
The University of Washington sponsored the first annual Health of the Hanford Site Conference, to provide current information on ecological, community and occupational health related to Hanford. Attending were researchers, scientists, health care providers and members of the public. HHIN was a co-sponsor.
1998
January:
The USDOE announced its intention to transfer $5 million to the ATSDR during fiscal year 1998 to initiate the Hanford Medical Monitoring Program, which ATSDR had recommended in 1997. However, this transfer did not occur.
The first phase was completed of two USDOE-funded projects to evaluate former Hanford workers' health status, and Phase II was begun. Phase II involves medical screening for former Hanford workers who had significant workplace exposure to such hazards as noise, beryllium (a toxic metal) and asbestos.
Summer:
The National Institute for Occupational Safety and Health (NIOSH) released the results of an epidemiologic study of multiple myeloma among USDOE workers at four sties, including Hanford. The study found that there was an increased risk of multiple myeloma for workers who received radiation doses at older ages.
September:
The IOM and NAS issued a report assessing the NCI's study of iodine-131 exposures to the U.S. population from nuclear bomb test fallout from the Nevada Test Site in the 1950s and 1960s. The report concluded that some Americans who were exposed are at higher risk for developing thyroid cancer. The report recommended that the government should not sponsor a systematic screening program for thyroid cancer, noting that the risks of such screening may outweigh the benefits. Instead, the IOM/NAS recommended an informational program on the Nevada tests and the risks of thyroid cancer following exposure to radiation.
Following release of the IOM/NAS report, the Advisory Committee on Energy-Related Epidemiologic Research (a federal citizens' advisory committee) passed a resolution recommending that the government further evaluate offering thyroid cancer screening for people exposed to Nevada Test Site fallout. In addition, the committee recommended that the government take a proactive approach by providing screening for hypothyroidism and other noncancerous thyroid and parathyroid diseases. The committee also recommended completing dose reconstruction for Nevada Test Site fallout (to include dose estimates for other radionuclides, such as strontium-90) and creating an information service for the public and health care providers.
On September 30, the HTDS researchers at Fred Hutchinson Cancer Research Center submitted their draft final report to the CDC. The CDC conducted internal scientific review and requested review from the NAS. The NAS declined to review the draft report until after it was made public.
Fall:
NIOSH released the results of a study of certain rare cancers in the children of USDOE workers at three sites, including Hanford. The study found no link between the childhood cancers and the fathers' on-the-job exposure to external ionizing radiation.
Congress re-authorized HHIN for up to three more years (1999-2001) but did not earmark any funds for HHIN. The USDOE's Richland office approved part of the funding HHIN had requested for 1999. HHIN determined that this grant would support its programs through July 1999.
October:
On October 29, the Hanford IDA Project began the process of offering iodine-131 thyroid dose estimates to individuals who lived or spent time in a 75,000 square-mile area around Hanford (the HEDR study area) between December 26, 1944 (the start of plutonium production) and December 31, 1957. The Project sent a brochure and a residence history form to everyone on the HHIN and HEDR mailing lists and held two news conferences to publicize the availability of the service.
1999
January:
A committee of the NAS completed review of specific issues related to the HEDR air pathway models for iodine-131. The CDC had requested this review as a result of issues raised at its technical workshop held in August 1997. The NAS committee concluded that the HEDR model was "structurally sound," although "validation studies are not as reliable as desired." CDC concluded that the computer model was sound and should be used by the HTDS and the Hanford IDA Project to estimate individual iodine-131 thyroid doses.
CDC announced that an error had been found in the HEDR dose code and that it would ensure that the error was corrected. The states sponsoring the Hanford IDA Project decided to delay calculating any individual dose estimates until the error was corrected. CDC decided to review other identified potential errors before determining whether further corrections would be done.
On January 28, CDC and researchers for the HTDS announced the findings from the study's Draft Final Report. The study evaluated whether or not the occurrence of thyroid disease was related to different levels of estimated radiation dose among persons who were exposed as children to iodine-131 released from Hanford into the air during the 1940s and 1950s. The study results in the Draft Final Report did not find a link between the estimated thyroid dose from iodine-131 and the amount of thyroid disease in the study population. The study did find thyroid diseases among the HTDS participants. However, those who had higher estimated radiation doses appeared to be no more likely to have thyroid diseases than those who had lower doses. CDC explained that these results do not prove that such a link does not exist.
CDC sent the HTDS Draft Final Report to the NAS for scientific peer review. The NAS report on its review came out in December 1999.
In light of the IOM/NAS report on Nevada Test Site exposures, the HTDS draft results, and discussions with community and tribal representatives, ATSDR modified its proposed Hanford Medical Monitoring Program. The changes would emphasize the program's educational messages and provide information to allow each person to make an informed decision about having a thyroid evaluation performed. No starting date was set for the program, since ATSDR had not yet received funding for it.
March:
HEAL closed its doors, citing waning public interest in Hanford, and a resulting difficulty in raising funds and attracting foundation support. The group donated a set of its newsletters, publications and reports to the Hanford Health Information Archives.
April:
The Hanford IDA Project was re-funded by the CDC to continue offering individual thyroid dose estimates through the end of March 2000. More than 9,000 individuals had completed the first form to request their dose estimate. Also by April, CDC had corrected one of the dose code errors that might affect individual dose estimates, and provided the corrected computer code to the Hanford IDA Project for use in calculating individual dose estimates.
May:
CDC held public meetings in Spokane and Seattle, Wash., to provide information about the HTDS Draft Final Report, correct miscommunications that occurred during initial January 1999 release of the report, respond to questions and take public comment.
June:
The NAS committee reviewing the HTDS Draft Final Report held a public meeting in Spokane, Wash., to take comments from the public.
July:
U.S. Secretary of Energy Bill Richardson announced a proposal to compensate former USDOE workers for diseases caused by their on-the-job exposures. The initial proposal covered beryllium exposures only, but the Clinton Administration formed an interagency group to study whether on-the-job exposures to asbestos and to radiation should be included also. President Clinton asked the group to report its recommendations by April 2000.
August:
ATSDR made public a draft final report of its Hanford Infant Mortality, Fetal Death and Preterm Birth Study. The draft study findings suggest that infants born to mothers living in geographical areas with the highest estimated exposure in 1945 may have had a higher risk for preterm birth, although it was unable to offer a medical explanation for this finding. The study also indicated that living during the latter part of pregnancy in areas with the highest estimated iodine-131 exposure was associated with preterm birth and may also be associated with a small increase in infant mortality. After scientific review, the final report is expected to be completed in the spring of 2000.
HHIN's funding was transferred from USDOE-Richland to ATSDR. Funding was extended through December 1999, with the possibility of an additional two years and with funding decisions to be made annually.
Summer:
ATSDR decided to take a phased approach to the Hanford Medical Monitoring Program. Phase I activities were to include outreach, education and risk communication messages for health care providers and the Hanford-exposed population. The focus will be on iodine-131 exposure and the risks of thyroid screening. Phase I was also to include an assessment of the needs for education and services for the exposed population. As of this date, ATSDR still had not received funding to implement the medical screening portion of the program.
September:
The Hanford IDA Project began sending out individual thyroid dose estimates to people exposed to Hanford's releases between 1944 and 1957. With more than 10,000 people who had started the dose estimate process by returning their residence history forms, and with the end of the Project's funding on March 31, 2000, the Hanford IDA Project established a waiting list for anyone returning a residence history form after late September.
December:
The NAS completed its scientific peer review of the HTDS Draft Final Report and held a public briefing in Spokane, Wash. The review panel wrote that the HTDS investigators "probably overstated the strength of their findings that there was no radiation effect." The panel found that the study methods were of high quality. However, the panel said that additional analyses are needed to explain what the study data mean about the full range of possible risk to the thyroid. The panel commended CDC for public involvement during the nine years of the study but found shortcomings in the way the report was released. The panel recommended several steps for improving the communication of the final report to the public. A revised HTDS report is expected by December 2000.
HHIN was notified that it would receive severely limited federal funding for 2000 and began preparing to close down.
2000
January:
The New York Times reported that the federal government interagency task force looking at workplace exposures to USDOE workers has concluded that exposure to radioactive materials and chemicals at USDOE facilities led to higher-than-normal rates of cancer among workers. The interagency task force's report was expected to be released on March 31.
February:
Facing a March 31 ending date, the Hanford IDA Project requested additional federal funding through December 2000 in order to provide individual thyroid dose estimates to everyone who sent in a residence history form by January 31, 2000. The Project said it could not accept new requests.
On February 3, USDOE Assistant Secretary Dr. David Michaels held a public meeting in Richland, Wash., to hear from current and former USDOE workers about work-related illnesses and their experience with the state workers compensation program. More than 500 people attended. In addition, USDOE offered a confidential toll-free line where workers could share their information.
March:
ATSDR began the Hanford Community Health Project, an outreach and education program related to iodine-131 releases. Assisting ATSDR, the National Opinion Research Center began work to review health care utilization and information needs related to thyroid disease.
May:
May 15 is the last day for HHIN's telephone lines and services. The Hanford Health Information Archives will remain open at least through June 30.
Abbreviations for Agency and Project Names
AEC: Atomic Energy Commission
ARCO: Atlantic Richfield Company
ATSDR: Agency for Toxic Substances and Disease Registry
CDC: Centers for Disease Control and Prevention
DHHS: U.S. Department of Health and Human Services
HEAL: Hanford Education Action League
HEDR: Hanford Environmental Dose Reconstruction Project
HHES: Hanford Health Effects Subcommittee
HHIN: Hanford Health Information Network
HTDS: Hanford Thyroid Disease Study
IDA: Hanford Individual Dose Assessment Project
IOM: Institute of Medicine
NAS: National Academy of Sciences
NCI: National Cancer Institute
NIOSH: National Institute for Occupational Safety and Health
PSR: Physicians for Social Responsibility
PUREX: Hanford's plutonium-uranium extraction plant
Redox: Hanford's reduction-oxidation plant
RHEA: Radiation Health Effects Archives
TSP: Technical Steering Panel for the Hanford Environmental Dose Reconstruction Project
UNC: United Nuclear Corporation
USDOE: U.S. Department of Energy
Selected Sources for Additional Reading
D'Antonio, Michael. Atomic Harvest: Hanford and the Lethal Toll of the Nuclear Arsenal. New York: Crown Publishers, 1993.
Filby, Roy and Joseph Stohr. "Environmental and Health Studies of Potential Impacts from Early Hanford Operations." Hanford Historical Documents Review Committee, 1987.
Gerber, Michele Stenehjem. On the Home Front: The Cold War Legacy of the Hanford Nuclear Site. Lincoln, Neb.: University of Nebraska Press, 1992.
Heeb, C.M. Radionuclide Releases to the Atmosphere from Hanford Operations, 1944-1972. PNWD-2222 HEDR, May 1994.
Kaplan, Louise. "A Slow Motion Emergency: Radiation Health Effects and Hanford" (Doctoral dissertation). Brandeis University, March 1992.
Loeb, Paul. Nuclear Culture: Living & Working in the World's Largest Atomic Complex. Philadelphia: New Society Publ., 1986.
Rhodes, Richard. Dark Sun: The Making of the Hydrogen Bomb. New York: Simon & Schuster, 1995.
Rhodes, Richard. The Making of the Atomic Bomb. New York: Simon & Schuster, 1986.
Stohr, Joseph. "Chronology of Events." Washington Department of Ecology memorandum, 1988.
Technical Steering Panel of the Hanford Environmental Dose Reconstruction Project. Representative Hanford Radiation Dose Estimates. Washington Department of Ecology, Nuclear Waste Program, April 21, 1994.
Thomas, Jim. "Hanford Historical Timeline." HEAL Perspective. Summer/Fall 1992, pp. 14-15.
Thomas, Jim. "Radiation from Hanford: A Chronology." HEAL Perspective. Fall 1990, page 7.
