( PDF format )
The Implications of The Massive Contamination of Japan With Radioactive Cesium
Senior Scientist, Physicians for Social Responsibility
Director, University of Missouri, Clinical Laboratory Science Program
Helen Caldicott Foundation Fukushima Symposium
New York Academy of Medicine, 11 March 2013
( PDF format )
The greatest amounts of highly radioactive gases were released shortly after the meltdowns and 80% of this gas released by the reactors is believed to have traveled away from Japan over the Pacific. However the remaining 20% was dispersed over the Japanese mainland.
US Dept of Energy: Plume Model predictions for Fukushima fallout
On March 11th, the US National Nuclear Security Administration offered the use of its NA-42 Aerial Measuring System to the Japanese and US governments. The National Atmospheric Release Advisory Center of the Lawrence Livermore Lab stood up to provide atmospheric modeling projections. The next two slides were produced by Lawrence Livermore and presumably given to the Japanese government.
March 13-15: Radioactive plume images Lawrence Livermore National Laboratory
On March 14th, the easterly winds which had been blowing the highly-radioactive gases and aerosols coming from Fukushima out to sea, shifted and pushed the radioactive plume back over the Japanese mainland. You can see the progression. The red indicates the radioactive plume.
Radioactive plume over Tokyo
Note that the images indicate that the plume first went south over Tokyo and then reversed and went north as the wind changed. All the areas where the radioactive gases passed over were contaminated. However the heaviest contamination occurred where rainfall was occurring and the radiation rained out. This accounts for the patchy deposition of the radioactive fallout.
Maps: Prof. Yukio Hayakawa of Gunma Univ AND Japanese Science Ministry Sept 2011
Eight months after the disaster, the Japanese Science Ministry released this map, which shows that 11,580 square miles, which is 30,000 square kilometers, which represents 13% of the Japanese mainland, had been contaminated with long-lived radioactive cesium. Note that the official map does not note any Cesium-137 contamination in the Tokyo metropolitan area, unlike an unofficial survey done at about the same time by Professor Yukio Hayakawa of Gunma University. Given the fact that the Japanese government and TEPCO denied for two months that any meltdowns had occurred at Fukushima, one must look at all official data with a healthy degree of skepticism.
4500 square miles (or earlier today we heard 7700 square miles)—which is an area larger than the size of Connecticut—was found to have radiation levels that exceeded Japan’s previously allowable exposure rate of 1 millisievert per year.
Rather than evacuate this area, Japan chose to raise its acceptable radiation-exposure rate by 20 times, from 1 millisievert to 20 millisieverts per year.
However, approximately 300 square miles adjacent to the destroyed Fukushima reactors were so contaminated that they were declared uninhabitable. 159,000 Japanese were evicted from this radioactive “exclusion zone.” They lost their homes, property, and businesses, and most have received only a small compensation to cover the costs of their living as evacuees.
Note here that the criteria used for evacuation is the millisievert. It is not a measured quantity of radiation per unit area that I have described such as the Curie or Becquerel. Rather the Sievert is a calculated quantity. It’s calculated to represent the biological effects of ionizing radiation. In other words, the millisievert is a derived number, based on the mathematical models which are used to convert the absorbed dose to “effective dose.”
So what is the increased health risk to Japanese based upon their exposure to 20 millisieverts per year? Let us examine figures constructed on the basis of data published by the National Academy of Sciences, courtesy of Ian Goddard.
[Source: National Academy of Sciences, Biological Effects of Ionizing Radiation BEIR VII Phase 2 Report: Health Risks from Exposure to Low Levels of Ionizing Radiation, National Academies Press, 2006, (pg. 311), adjusted 100 millisieverts to 20 millisieverts by Ian Goddard according to BEIR instructions. See chart on page 29 of “Radioactive Emissions and Health Hazards Surrounding Browns Ferry Nuclear Plant,” by Joseph Mangano, MPH, Director Radiation and Public Health Project, and BEST/MATRR Gretel Johnston, June 4, 2013.]
The vertical Y-axis is calibrated to the number of cancer cases per 100,000 age-peers, and the horizontal X-axis depicts the age of the population, beginning at zero years and moving towards old age. Now examine the allegedly safe dose of 20 millisieverts per year.
As a result of this exposure, there will be about 1000 additional cases of cancer in female infants and 500 cases of cancer in infant boys per 100,000 in their age groups. There will be an additional 100 cases of cancer in 30 year old males per 100,000 in this age peer group.
Notice that children, especially girls, are at the most risk from radiation-induced cancer. In fact a female infant has 7 times greater risk and a 5 year old girl has 5 times greater risk of getting a radiation-induced cancer than does a 30 year old man.
I want to note here that there is a great deal of controversy in regards to the accuracy of the methods used to arrive at the millisievert measurement, especially in regard to an accurate determination of the biological effects of an external versus internal exposure to ionizing radiation.
That is, the effects of an exposure to a source of ionizing radiation that is external to the body, versus an exposure that comes from the ingestion of radionuclides that provide a chronic, long-term internal exposure to living cells, which are adjacent to the radioactive atoms or particles.
In the lands surrounding Chernobyl and Fukushima, the primary route of internal exposure is through the ingestion of foodstuffs contaminated with Cesium-137, which tends to bioaccumulate in plants and animals. What this means is that Cesium-137 cannot be excreted faster than it is being ingested. Thus it accumulates and increases in its concentration in the plant or animal that is routinely ingesting it.
Cesium-137 also tends to biomagnify as it moves up the food chain. This means it becomes progressively more concentrated in predator species. We have seen this before with other industrial toxins, such as DDT, which can magnify its concentration millions of times from the bottom to the top of a food chain.
Consequently, all of the foodstuffs in a contaminated region tend to contain Cesium-137. Those naturally rich in potassium, such as mushrooms and berries, tend to have very high concentrations. Dairy products and meats also tend to have higher concentrations.
The International Commission on Radiological Protection, the ICRP, which sets radiation safety standards recognizes that Cesium-137 bioaccumulates in humans. This ICRP figure compares a single ingestion of 1000 Becquerels of Cesium-137, a one-time exposure, with the daily ingestion of 10 Becquerels. On the single exposure notice that half the Cesium-137 is gone from the body in 110 days. That’s considered the biological half-life.
Note also that with the routine daily ingestion of 10 Becquerels of Cesium-137 the total radioactivity within the body continues to rise, until after about 500 days there are more than 1400 Becquerels of radioactivity measured in the body. Becquerels can be counted in living persons because the decay of Cesium-137 leads to the emission of gamma radiation which passes through the body and can be measured by a Whole Body Counter. They have a chair that kids, or anyone, can sit and they can calculate the amount of Becquerels per kilogram of body weight.
In a 70 kilogram adult (based on this), a total body activity of 1400 Becquerels would correspond to 20 Becquerels per kilogram of body weight. In a 20 kilogram child it would be 70 Becquerels per kilogram of body weight. The ICRP document does not specify the average age or weight of those examined in the study. However, the safety standards that have been set by the nuclear industry do not consider this level of chronic exposure to so-called “low-dose” radiation to be a significant danger to human health.
The ICRP states in this document that a whole body activity of 1400 Becquerels is equivalent to an exposure of one-tenth a millisievert per year. In other words, the radiation models used by radiation biologists that convert this level of internal absorbed dose to “effective dose,” do not predict serious health risks from such exposures. In fact they state that it is safe to have 10 times this exposure level.
[Source: ICRP, 2009. Application of the Commission’s Recommendations to the Protection of People Living in Long-term Contaminated Areas After a Nuclear Accident or a Radiation Emergency. ICRP Publication 111. Ann. ICRP 39 (3).]
There is however strong evidence that the ingestion of these levels of so-called “low-dose” radiation are, in fact, particularly injurious to children. Research done by Dr. Yuri Bandazhevsky, and his colleagues and students, in Belarus during the period 1991 through 1999, correlated whole body radiation levels of 10 to 30 Becquerels per kilogram of whole body weight with abnormal heart rhythms and levels of 50 Becquerels per kilogram of body weight with irreversible damage to the tissues of the heart and other vital organs.
One of the key discoveries made by Bandazhevsky was that Cesium-137 bioconcentrates in the endocrine and heart tissues, as well as the pancreas, kidneys and intestines. This goes completely against one of the primary assumptions used by the ICRP to calculate “effective dose” as measured by milliseiverts: that Cesium-137 is uniformly distributed in human tissues.
Let me restate that. The current ICRP methodology is to assume that the absorbed dose is uniformly distributed in human tissues. This is, in fact, not the case.
This table, taken from Bandazhevsky’s “Chronic Cs-137 incorporation in children’s organs,” compares the radioactivity measured in 13 organs of 6 infants. Very high specific activity, that is, levels of radioactivity, often 10 times higher than in other organs and tissues were found in the pancreas, thyroid, adrenal glands, heart, and intestinal walls.
Bandazhevsky summarized his nine years of research in his study entitled, “Radioactive Cesium and the Heart” . With the help of friends I have just finished editing a new Russian-to-English translation of this work .
It was never previously translated in large part because shortly after Dr. Bandazhevsky presented it to the Parliament and the President of Belarus, he was summarily arrested and imprisoned. Government agents entered the Medical Institute which he directed and destroyed his archived slides and samples. After he was released from prison he was held under house arrest. It was during this time that he actually wrote the study. He did so in an attempt to preserve his research knowing that he was about to be imprisoned again for a very long time.
Just as Soviet physicians were forbidden to diagnose a radiation-related illness following Chernobyl, the Belarusian government acted to suppress the work of Bandazhevsky who had been protesting government efforts to resettle people back into land badly contaminated with Cesium-137.
In “Radioactive Cesium and the Heart,” Bandazhevsky also did a correlation between the amount of Cesium-137 in live children and their heart function. He worked with the BELRAD Institute, which conducted more than 100,000 Whole Body Counts on Belarusian children, measuring the amounts of internally ingested Cesium-137 in each child.
There were so many contaminated children in Belarus that it was difficult to find any with zero Becquerels per kilogram. However only those with less than 10 Becquerels per kilogram of body weight had normal Electro Cardiograms [ECGs]. 35% of the children with 11 to 37 Becquerels per kilogram had normal ECGs. 20% of children with 37 to 74 Becquerels per kilogram had normal ECGs. And only 11% of those with 74 to 100 Becquerels per kilogram had normal ECGs.
This slide, which shows the averaged results from hundreds of autopsies done during 1997, is also taken from “Radioactive Cesium and the Heart.” Notice the very high concentration of Cesium-137 in the thyroid gland.
While we generally worry about radioactive iodine concentrating in the thyroid, Bandazhevsky’s work shows us that Cesium-137 is likely to play a major role in thyroid cancer too.
If Cesium-137 enters the body, it is distributed fairly uniformly throughout the body’s soft tissues, resulting in exposure of those tissues.
I want to point out again that the currently accepted medical and legal understanding of Cesium-137 is that it is “distributed fairly uniformly” in human tissues. I copied the web page from the US EPA website, from which this quote is taken. Clearly, the autopsied human tissue samples analyzed by Bandazhevsky show that this is not the case. This new understanding needs to be incorporated into the way we understand how internally ingested radionuclides act upon the human body.
1967-2000, Life expectancy at birth, male (years) in Belarus
Two million people in Belarus live on lands severely contaminated by Cesium-137. Most of the children that live there are not considered to be healthy although they were before the nuclear power plant at Chernobyl exploded in 1986. Fourteen years after the explosion, 45 to 47 percent of high school graduates had physical disorders, including gastro-intestinal anomalies, weakened hearts, and cataracts. And 40% were diagnosed with chronic “blood disorders” and malfunctioning thyroids.
I am afraid that there are many Japanese people now living on lands equally contaminated with radioactive cesium. If Japanese children are allowed to routinely ingest foodstuffs contaminated with Cesium-137, they will likely develop the same health problems that we see now in the children and teenagers of Belarus and Ukraine.
Thus it is very important that we recognize the danger posed to children by the routine ingestion of contaminated food with Cesium-137 where ever they might live. It is also important to prevent further nuclear disasters which release these fiendishly toxic poisons into the global ecosystems. Given the immense amounts of long-lived radionuclides which exist at every nuclear power plant this is an urgent task.
I hope I have made it clear that long-lived radionuclides produced by nuclear power plants are neither “safe” nor “clean.” I would suggest that it is very bad idea to manufacture these nuclear poisons to try to make electricity, that it is past time we stopped manufacturing them and try to manage those which we have already created which must be isolated from the ecosystems for at least 100,000 years.
Biographical Sketch of Steven Starr (from PSR):
Steven Starr, MT (ASCP), graduated from the School of Health Professions at the University of Missouri, Columbia in 1985. He subsequently worked as a Medical Technologist over a period of 27 years at a number of hospitals in Columbia, Missouri, including Columbia Regional Hospital, Boone Hospital Center, and Ellis Fischel Cancer Center, as well as at Saint Mary’s Health Center, in Jefferson City, Missouri. Mr. Starr is currently the Director of the Clinical Laboratory Science Program at the University of Missouri.
Steven is an Associate member of the Nuclear Age Peace Foundation and has been published by the Bulletin of the Atomic Scientists. His writings appear on the websites of PSR, the Nuclear Age Peace Foundation, the Moscow Institute of Physics and Technology Center for Arms Control, Energy and Environmental Studies, Scientists for Global Responsibility, and the International Network of Scientists Against Proliferation. Since 2007, he has worked with the governments of Switzerland, Chile, and New Zealand, in support of their efforts at the United Nations to eliminate thousands of high-alert, launch-ready nuclear weapons.
Mr. Starr is also an expert on the environmental consequences of nuclear war, and in 2011, he made an address to the U.N. General Assembly describing the dangers that nuclear weapons and nuclear war poses to all nations and peoples. He has made presentations to Ministry Officials, Parliamentarians, Universities, citizens and students from around the world, and specializes in making technical scientific information understandable to all audiences.
Bibliography of Recently Published Works:
- The Effects of a 300 kiloton Nuclear Warhead Detonated Above Washington, D.C., Nuclear Age Peace Foundation, November, 2005
- PDF: Change Launch on Warning Policy, Phillips A, Starr S, Moscow Institute of Physics and Technology Center for Arms Control Strategic Arms Reductions (STAR), April, 2006
- An Explanation of Nuclear Weapons Terminology, Nuclear Age Peace Foundation, December, 2007
- Catastrophic Climatic Consequences of Nuclear Conflict, Bulletin of the International Engineers and Scientists Against Nuclear Proliferation, Volume 28, April, 2008. Updated version published by the International Commission on Nuclear Non-Proliferation and Disarmament, December, 2009 at http://icnnd.org/Documents/Starr_Nuclear_Winter_Oct_09.pdf
- Cold War has Thawed Only Slightly, Columbia Daily Tribune, June 22, 2008
- PDF: High-Alert Nuclear Weapons: the Forgotten Danger, Scientists for Global Responsibility Newsletter, No. 36, Autumn 2008
- Nuclear Suicide, Australia Broadcasting Company (ABC) Unleashed website, July 31, 2009 (reproduced in this sciencealert.com link)
- PDF: Deadly Climate Change from Nuclear War: A Threat to Human Existence, Strategic Arms Reduction website of the Moscow Institute of Physics and Technology, December 27, 2009 (Russian text)
- PDF: The Lessons of Fukushima and Chernobyl Briefing Book, Starr S, Patterson J, Helfand I, Kanter A, Rachow J, Physicians for Social Responsibility, April 17, 2011
- PDF: U.S. and Russian Launch-Ready Nuclear Weapons: A Threat to All Nations and Peoples, Nuclear Age Peace Foundation, June 24, 2011
- Will US Lack of Imagination Lead to Nuclear Nightmare? Truthout, January 17, 2012
- NATO and U.S. Missile Defense in Europe are a Serious Political Concern, Nuclear Age Peace Foundation, July 20, 2012
- The Missile Crisis That Never Went Away, Starr S, Krieger D, Ellsberg D, Truthdig, October 16, 2012
- “Costs and Consequences of the Fukushima Daiichi Disaster,” PSR – Environmental Health Policy Institute, October 31, 2012
- Steven Starr maintains a web site on the long-term environmental consequences of nuclear war: Nuclear Darkness, Global Climate Change & Nuclear Famine
Editor‘s note: this transcript was created from the broadcast quality audio recording program featuring Steven Starr produced by Maria Gilardin in her Fukushima Symposium Mini Series on TUC Radio. Starting with the PDF file in the March 11 Documents tab of < http://www.totalwebcasting.com/view/?id=hcf#>, the text below was fashioned using Maria’s Introduction and Mr. Starr’s actual presentation. (All highlighted text in the original PDF – e.g., underlining, italics, bold – is represented below as underlined text.) The slides were generated from copy generously provided by Mr. Starr. I am grateful for the assistance of Steven Starr and Maria Gilardin in assembling this presentation.