Fukushima Information

In 2011, the Japanese experienced the worst earthquake in their history, followed by a devastating tsunami. These natural disasters have had a serious impact on several Japanese nuclear reactors, principally those at the Fukushima Daiichi site. The Health Physics Society (HPS) is concerned about radiation exposures associated with these reactor problems and desires to keep our members and the concerned public advised on current events associated with the Japanese nuclear plants.



HPS convened a panel of leading scientific experts on radiation safety at the National Press Club in Washington, DC, a year after the accident for the benefit of invited media personnel. The name of the program was "Risks and Effects of Radiation: Putting Fukushima in Context." Read more here.



In 2013, two years after the accident, HPS Web Operations published Radiation and Risk: Expert Perspectives on this website, a compilation of papers on topics including natural radiation, medical applications of radiation, effects of natural and man-made radiation on the environment, safety controls of nuclear energy production, risk communication, and the regulatory implications of radiation safety. Other resources are given below.

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Fukushima Information

DOD Operation Tomodachi Registry

Fukushima Nuclear Accident Independent Investigation Commission Report

"Fukushima Daiichi: ANS Committee Report"

Fukushima Release of Radiation and Potential Health Effects

Presentation on the Fukushima Accident

IRSN of France Report on External Doses and Outcome of Population Evacuation Measures

Fukushima Documents Released by the Japanese Ministry of Economy, Trade, and Industry (METI)

IAEA Report: The Fukushima Daiichi Accident

Reflections on the Fukushima Daiichi Nuclear Accident: Toward Social-Scientific Literacy and Engineering Resilience



General Information

HPS Information for Radiation Questions

Recommended Sources of Useful Information

Background Information on Nuclear Power

US Department of Energy Radiation Monitoring Data

Fukushima Information

DOD Operation Tomodachi Registry

The Department of Defense (DOD) began establishing the Operation Tomodachi Registry following the devastating 11 March 2011 earthquake and tsunami in Japan. These unfortunate events caused severe damage to the Fukushima Daiichi Nuclear Power Station, which resulted in the release of radiation into the environment. This registry includes the names of nearly 75,000 DOD-affiliated individuals who were on or near the mainland of Japan during the period from 12 March 2011 to 11 May 2011, along with radiation-exposure estimates for each of these individuals.

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Fukushima Nuclear Accident Independent Investigation Commission Report

The Fukushima Nuclear Accident Independent Investigation Commission has issued its report. The commission was appointed by the Japanese Diet. An English-language version of the executive summary of the report can be found on the Web Archiving Project website.

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Fukushima Daiichi: ANS Committee Report

"Fukushima Daiichi: ANS Committee Report" has been published by the American Nuclear Society (ANS) Special Committee on Fukushima. As stated in the report: "The Committee was charged to provide a clear and concise explanation of the accident events, health physics, and accident cleanup, as well as safety-related issues that emerged. The Committee also evaluated actions that ANS should consider to better communicate with the public during a nuclear event."

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Fukushima Release of Radiation and Potential Health Effects

The emotional trauma of the devastating events in Japan is overwhelming. While the members of the HPS can only offer our condolences for those who have lost loved ones and our support for those still looking for loved ones, we can help put minds at ease regarding the radiation from the Japanese reactors that has been detected in the United States.



Radioactivity has been detected in nearly every state, whether it be in rain water, in the air, or in milk. We understand that the fear that arises from hearing about radioactivity being found nearby can cause increased stress and, sometimes, an overwhelming sense of loss of control. This is why it is important for you to know that the amount of radioactivity being detected in the United States is of no concern; we can drink the milk, eat food out of our gardens, and drink water from our faucets.



As for foods that may be imported from Japan, there are three safety nets in place so you can feel safe eating what you buy at the grocery store. The first safety net is the ban on importing food from within Japan's evacuation zone (within about 20 kilometers of the nuclear reactors), the second safety net is Japan's monitoring of other foods prior to leaving Japan, and the third safety net is the US Department of Agriculture, which monitors and inspects our imported food.



It is important to stay informed about the radiation levels that are being detected so you can make the best decisions for your family. With this in mind, we will continue to update our website with new information regarding the Fukushima reactors.



We will also continue to follow results from the radionuclide-sampling stations throughout the country used by the Environmental Protection Agency (EPA) (you can look at them at RadNet Overview on the EPA website) and the monitoring network by the 104 operating nuclear power facilities (monitoring air, water, milk, and foods) to be able to provide you with up-to-date information.



Other helpful links:

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Presentation on the Fukushima Accident

Areva's "The Fukushima Daiichi Incident" is available.

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IRSN of France Report on External Doses and Outcome of Population Evacuation Measures

The Institut de Radioprotections et de Sûreté Nucléaire (IRSN) has published "Assessment on the 66th Day of Projected External Doses for Populations Living in the North-West Fallout Zone of the Fukushima Nuclear Accident: Outcome of Population Evacuation Measures." According to the IRSN, "The purpose of this report is to provide insight on all radiological assessments performed to our knowledge to date and the impact of population evacuation measures to be taken to minimize the medium and long-term risks of developing leukaemia or other radiation-induced cancers."

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Fukushima Documents Released by the Japanese Ministry of Economy, Trade, and Industry (METI)

Nuclear Emergency Response Headquarters

Reference: TEPCO Release Documents

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IAEA Report: The Fukushima Daiichi Accident

The International Atomic Energy Agency (IAEA) publicly released The Fukushima Daiichi Accident by the Director General along with five technical volumes on this topic by international experts.

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Reflections on the Fukushima Daiichi Nuclear Accident: Toward Social-Scientific Literacy and Engineering Resilience

Reflections on the Fukushima Daiichi Nuclear Accident: Toward Social-Scientific Literacy and Engineering Resilience has been published electronically by Springer Link. This book was developed through a collaboration between the University of California Berkeley (UCB) and the University of Tokyo, between social scientists and engineers. Most of the work included in the book was performed after the Fukushima Daiichi Accident in March 2011 and the summer school held at UCB in August 2011.



The content of the book is available at no cost in PDF format at on the Springer Link website.

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General Information

HPS Information for Radiation Questions

As the world continues to focus on events at the Fukushima Daiichi nuclear plant site, many people are inquiring about the releases of radioactivity and the potential health effects from radiation that plant workers and the surrounding populations may be experiencing. We have seen reported radiation levels in the vicinity of the plant that are quite significant. The HPS has identified the following list of authoritative resources on this website that you can consult for answers to such questions:

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Recommended Sources of Useful Information

The HPS recommends the following sources of useful information. Although we cannot verify the accuracy of all the information that you may find, we believe these sources are generally reliable and trustworthy. As events unfold and the potential radiation exposures become better known, we hope to be able to share additional information with you regarding radiation safety.

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Background Information on Nuclear Power

For background and an overview of nuclear power, see our seven-part series "The Resurgence of Nuclear Power: Impact on the Health Physics Profession," reprinted from Health Physics News.

Dick Toohey's "Nuclear Power and Public Health Measures in Nuclear Plant Emergencies" also provides useful information.

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US Department of Energy Radiation Monitoring Data

The US Department of Energy has released data recorded from its Aerial Monitoring System as well as ground detectors deployed in Japan. That data has been collected, analyzed, and posted on the Department of Energy's website.

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