Littérature scientifique sur le sujet « Plutonium – health aspects »

ATOMIC DOCTORS: Conscience and Complicity at the Dawn of the Nuclear Age by James L. Nolan Jr. Cambridge, MA: The Belknap Press of Harvard University Press, 2020. 294 pages, plus index. Hardcover; $29.95. ISBN: 9780674248632. *This book ends with a tragic photograph. The reader will see a young boy carrying a sleeping infant on his back. However, the infant is not asleep but instead is dead as his brother waits his turn to have his brother's body thrown into a giant pyre at Nagasaki in the days following the atomic bomb blast. This picture is symbolic of the tragedy of war and provides a provocative statement regarding the involvement of US physicians in the development of the atomic weapons program toward the end of World War II. The author, James L. Nolan Jr., PhD (Professor of Sociology, Williams College), provides an excellent historical vignette of this period through a written biography of his grandfather, James F. Nolan, MD. *Dr. Nolan, as well as Louis Hempelmann, MD and Stafford Warren, MD, were intricately involved with the Trinity testing in New Mexico as well as with the development of the atomic bomb as part of the Manhattan Project. Dr. Nolan met and collaborated with such famous people associated with the Manhattan Project, including J. Robert Oppenheimer, Edward Teller, and General Leslie Groves. The entire group of physicians oversaw determining radiation risks during atomic bomb development and testing. This placed them in a difficult situation which "linked the arts of healing and war in ways that had little precedent" (p. 166) especially regarding the Hippocratic Oath.1 *Dr. Nolan was involved with setting up the hospital at Los Alamos as well as providing medical care for the Los Alamos staff and families. However, the job of these clinicians also had other aspects. Radiation exposure to workers was observed and recorded at Los Alamos leading to some of the initial descriptions of radiation poisoning. Additionally, the physicians were involved in determining radiation hazards associated with Los Alamos and in the setting of Trinity with most of their findings either being ignored or hidden from the public, sometimes with the complicity of these individuals. It is fascinating to consider that Dr. Nolan was one of the military personnel chosen to accompany Little Boy (the bomb that exploded over Hiroshima) to the Pacific Front at Tinian Island on the famous and later tragic USS Indianapolis. I cannot imagine, in our present time, that a physician would be charged with transporting and reporting the safety of a technologically advanced weapons system. *The book contains many fascinating stories, including how military physicians as well as other personnel were told to assert there was no significant radiation after the bombing in Japan (despite obvious radiation injury being noted in thousands of individuals), how the military allowed reporters at the Trinity test site after the bomb test with no protection except for "protective" booties, how US military physicians were told to not treat Japanese civilians after the bombing in order to circumvent moral responsibility of the bombing (this was ignored), how the inhabitants of the Bikini Atoll and Enewetak Atoll were forced to abandon their ancestral homes so that further atomic bomb testing could occur (with subsequent deleterious effects in their sociologic and health outcomes), and how patients in the United States (many who were already terminally ill) were secretly injected with plutonium to determine the effects of radiation injury. *Besides being a biography and history of a physician and his colleagues, this book also goes in some philosophical directions, including considering what is the goal of technology. Oppenheimer himself stated that "It's amazing ... how the technology tools trap one" (p. 33). The "trap" leads to a myriad of issues. Dr. Nolan believed radiation should be considered under the paradigm of an "instrumentalist view of technology" in which new technology could be used for the advancement or decline of our species. In his case, he began experimenting with radiation to treat gynecologic cancer in his patients. The book then explores "technological determinism," both optimistic and pessimistic, which is still an issue permeating our culture today. The author states that humans appear to always choose technologic advances even before fully knowing downstream economic, political, or cultural effects. Such examples cited by the author include the internet, social media, and genetic engineering. *A Christian will find this book unsettling when one considers what one prioritizes in his (her) faith. For example, one of the physicists who worked at Los Alamos was a Quaker. The Trinity test was named after the Christian Trinity (based on a John Donne sonnet). These facts are sobering when the author provides reports of "downwinders" who suffered catastrophic disease after the Trinity test as well as going into detail about the thousands of Japanese who suffered radiation poisoning after the nuclear bombing. In addition, the bombing of Nagasaki was close to the Christian part of the city resulting in the killing of most of the Christians living there. Indeed, the pursuit of science is a fascinating human endeavor, but the point of science is to objectively determine facts. Science does not necessarily provide subjectivity by itself which allows it to be influenced by meaning, moral values, and responsibility.2 In the moral arena, people with religious beliefs, including Christians, are required to influence the idea of technologic determinism in a positive direction. I highly recommend this book not only to learn about an interesting part of world history but also to appreciate the tragedy of the human condition in the setting of war. *Notes *1Michael North, translator, "Greek Medicine," History of Medicine Division, National Library of Medicine, National Institutes of Health, last updated February 7, 2012, https://www.nlm.nih.gov/hmd/greek/greek_oath.html. *2Mehdi Golshani, "Science Needs a Comprehensive Worldview," Theology and Science 18, no. 3 (2020): 438-47. *Reviewed by John F. Pohl, MD, Professor of Pediatrics, Department of Pediatrics, University of Utah, Salt Lake City, UT 84113.

Ongoing experimental work has been underway at selected nuclear sites in the Russian State Atomic Energy Corporation (ROSATOM) during the past two years to determine the effectiveness, reliability, application and acceptability of high technology polymers for liquid radioactive waste solidification. The long term project is funded by the U.S. Department of Energy’s Initiatives for Proliferation Prevention (IPP) program. IPP was established in 1994 as a non-proliferation program of DOE / National Nuclear Security Administration and receives its funding each year through Congressional appropriation. The objectives of IPP are: • To engage former Soviet nuclear weapons scientists, engineers and technicians, currently or formerly involved with weapons of mass destruction, in peaceful and sustainable commercial activities. • To identify non-military, commercial applications for former Soviet institute technologies through cooperative projects among former Soviet weapons scientists, U.S. national laboratories and U.S. industry. • To create new technology sources and to provide business opportunities for U.S. companies, while offering commercial opportunities and meaningful employment for former weapons scientists. Argonne National Laboratory provides management oversight for this project. More than 60 former weapons scientists are engaged in this project. With the project moving toward its conclusion in 2012, the emphasis is now on expanding the experimental work to include the sub-sites of Seversk (SCC), Zheleznogorsk (MCC) located in Siberia and Gatchyna (KRI) and applying the polymer technology to actual problematic waste streams as well as to evaluate the prospects for new applications, beyond their current use in the nuclear waste treatment field. Work to date includes over the solidification of over 80 waste streams for the purpose of evaluating all aspects of the polymer’s effectiveness with LLW and ILW complex waste. Waste stream compositions include oil, aqueous, acidic and basic solutions with heavy metals, oil sludge, spent extractants, decontamination solutions, salt sludge, TBP and other complex waste streams. Extensive irradiation evaluation (up to 270 million rad), stability and leach studies, evaporation and absorption capacity tests and gas generation experimentation on tri-butyl phosphate (TBP) waste have been examined. The extensive evaluation of the polymer technology by the lead group, V.G. Khlopin Radium Institute, has resulted in significant discussion about its possible use within the ROSATOM network. At present the focus of work is with its application to legacy LLW and ILW waste streams that exist in a variety of sectors that include power plants, research institutes, weapons sites, submarine decommissioning and many others. As is the case in most countries, new waste treatment technologies first must be verified by the waste generator, and secondly, approved for use by the government regulators responsible for final storage. The polymer technology is the first foreign sorbent product to enter Russia for radioactive waste treatment so it must receive ROSATOM certification by undergoing irradiation, fire / safety and health / safety testing. Experimental work to date has validated the effectiveness of the polymer technology and today the project team is evaluating criteria for final acceptance of the waste form by ROSATOM. The paper will illustrate results of the various experiments that include irradiation of actual solidified samples, gas generation of irradiated samples, chemical stability (cesium leach rate) and thermal stability, oil and aqueous waste stream solidification examples, and volume reduction test data that will determine cost benefits to the waste generator. Throughout the course of this work, it is apparent that the polymer technology is selective in nature; however, it can have broad applicability to problematic waste streams. One such application is the separation and selective recovery of trans-plutonium elements and rare earth elements from standard solutions. Another application is the use of polymers at sites where radioactive liquids are accidently emitted from operations, thus causing the risk of environmental contamination.

Nuclear energy systems are necessary to assure sufficient energy resources without harming the environment. Fast reactor (FR) systems are especially important taking into account the limited uranium resources and the nuclear sustainability. As the FR system is still under development, FR deployment start-time and rate are unclear. On the other hand, it is desirable to reduce light water reactor (LWR) spent fuel due to the difficulties of storage and disposal (retrievable) site determination. Reprocessing is one of the effective methods to reduce LWR spent fuel but the recovery and long-term storage of plutonium, even with uranium, is undesirable for the aspect of proliferation resistance. The authors propose the new system named Flexible Fuel Cycle Initiative (FFCI), which recovers only uranium (∼90%) from LWR spent fuel and stores the residual material (∼5% U, ∼1% Pu, ∼4% other nuclides) for the future FR deployment. Residual material named recycle material (RM) is suitable for FR fresh fuel preparation due to its high Pu concentration and similar Pu/U ratio to FR core fuel, and for proliferation resistance due to its high concentrations of fission products (FP) and minor actinides (MA). The volume of RM is about 1/10 of that of LWR spent fuel. However RM needs sufficient heat removal, radiation shielding and criticality safety. After the FR development is finished and several years before the commercial FR deployment start-time, Pu and U will be recovered from the RM that might be stored liquid or solid state. Many well known methods can be applied for U recovery such as solvent extraction, crystallization, precipitation, electro refining, and fluoride volatilization. As recovered U has slightly higher U-235 concentration than natural U, its re-enrichment and recycling in LWRs seems to be effective for ultimate utilization of nuclear resources. In this case fluoride volatility U recovery method is most preferable because the product is UF6 that is the supply material for enrichment. Quantitative evaluations have been carried out for several fuel cycle systems including FFCI with parameters such as spent fuel amounts, facility capacity and Pu balance, which revealed the feasibility and flexibility of FFCI for LWR spent fuel reduction, high facility capacity factors and sufficient (no excess) Pu supply to FR.