How does radiation damage work?ANS Nuclear CafeJune 15, 2011, 6:00AM|Ted RockwellA typical description of what happens when you're "exposed to radiation" sounds scary-a gamma ray slams into a cell! Sounds like something you wouldn't want to have happen very often.But we are, in fact, exposed to natural radiation all the time, and about 1 percent of our body's 100 million million cells are damaged by natural radiation and repaired every day. Any virginal, undamaged cells in our bodies don't stay that way very long.Radiation is the least of a cell's problems, however. The process of metabolism-breathing in oxygen to digest our food-causes each cell to be damaged and repaired a million times a day.Damage by a gamma ray is somewhat different than metabolic damage, but the nature of that difference is understood. Even after accounting for that difference, there is about a million times more damage from the metabolic process than from natural radiation.A lethal amount of radiation does its job, not so much by directly damaging the cells, but by inhibiting the body's defenses-its damage prevention, repair, and removal processes. But an important implication of this radiobiological phenomenon is that when an organism receives a small gamma dose-e.g., 1 mSv-its damage-control processes are stimulated, not only to repair or remove most of the radiation-damaged cells, but also to repair/remove the much greater number of cells that were altered by metabolism and other causes (including cancer metastases). This is the source of hormesis, the process whereby small amounts of a stressor-whether it is radiation, sunshine, exercise, heat, vaccination, or poison-actually cause beneficial effects.There is a lot more that could be said about radiation damage. You are invited to contribute your thoughts and concerns on the subject.For additional information on radiation and uses of radiation, see: ANS Radiation Interactive Dose Chart Health Physics Society: RadiationAnswers.org A Day with the Atom ... Living with Zest! by Alan Waltar____________________________________________________ RockwellTed Rockwell wrote his first published article on nuclear technology, "Frontier Life Among the Atom Splitters," for the December 1, 1945, Saturday Evening Post. He was Adm. Rickover's technical director during the first 15 years of the naval propulsion program, while Rickover served as director of President Eisenhower's Atoms for Peace program. Rockwell then co-founded the international engineering firm, MPR Associates, and the public interest organization, Radiation, Science and Health. He was the first recipient of ANS's Lifetime Achievement Award, subsequently called The Rockwell Award. He is a member of the National Academy of Engineering and the author and/or editor of several books, papers, and patents, including the "Reactor Shielding Design Manual" in 1956, which is still used as a standard textbook. Rockwell is a guest contributor to the ANS Nuclear Cafe.Tags:american nuclear societyradiationShare:LinkedInTwitterFacebook
Farming in FukushimaScreenshot of the video from Vice. Vice News has published a video on YouTube that follows two farmers from the Fukushima Prefecture, Noboru Saito and Koji Furuyama. Saito, who grows many different crops on his farm, says that the rice grown in the area is consistently rated as the best. Furuyama specializes in peaches and explains his strategy to deal with the stigma of selling fruit from Fukushima: grow the best peaches in the world.Go to Article
The Toxic Pigs of Fukushima kicks off an online documentary seriesA film titled The Toxic Pigs of Fukushima gets top billing as part of The Short List with Suroosh Alvi, an online documentary series curated by the founder of the media company Vice. The film, which first aired on Vice TV on January 31, follows local hunters who have been enlisted to dispose of radiated wild boars that now roam abandoned streets and buildings in Fukushima Prefecture, Japan, in the aftermath of the 2011 earthquake and tsunami that caused the nuclear accident there.Go to Article
LA Times asks, “How safe is the water off SONGS?”A California surfer. Photo: Brocken Inaglory/WikicommonsThe Los Angeles Times published an article on December 1 about a recent collaboration between the Surfrider Foundation and the Woods Hole Oceanographic Institution to determine how safe the water is off the coast of the San Onofre Nuclear Generating Station (SONGS).Go to Article
Nuclear power: Are we too anxious about the risks of radiation?RowlattFollowing U.K. Prime Minister Boris Johnson’s recent restatement of the United Kingdom’s commitment to nuclear power, BBC News chief environment correspondent, Justin Rowlatt, wrote an article aimed at separating fact from fiction regarding the safety and benefits of nuclear energy.Among his points, Rowlatt defended the use of nuclear power to combat climate change, examined the data behind deaths from radiation exposure directly caused by the Chernobyl and Fukushima accidents, and explained that exposure to low levels of radiation is not a major health risk.Go to Article
Harnessing the promise of radiation: The art of reasonablenessRadiation has benefited mankind in many ways, including its use as an energy source and an indispensable tool in medicine. Since the turn of the 20th century, society has sought ways to harness its potential, while at the same time recognizing that radiological exposures need to be carefully controlled. Out of these efforts, and the work of many dedicated professionals, the principles of justification, optimization, and limitation have emerged as guiding concepts.Justification means that the use of radiation, from any radiation source, must do more good than harm. The concept of optimization calls for the use of radiation at a level that is as low as reasonably achievable (ALARA). Dose constraints, or limitation, are meant to assist in reaching optimization and protection against harm by setting recommended numerical levels of radiation exposure from a particular source or sources. Together, these three principles form the bedrock of the international radiation protection system that drives decision-making and supports societal confidence that radiation is being used in a responsible manner.Go to Article
Low-dose radiation has found its analogueCraig PiercyOriginally published in the September 2020 issue of Nuclear News.This issue of Nuclear News is dedicated to highlighting advancements in health physics and radiation protection as well as the contributions of the men and women who serve in these fields. It comes at a time when COVID-19 is providing the entire world with an immersive primer on the science of epidemiology and the importance of risk-informed, performance-based behavior to contain an invisible—yet deadly—antagonist.Go to Article
Piercy discusses wide-ranging topics on Titans of Nuclear podcastANS Executive Director/CEO Craig Piercy was a recent guest on the Titans of Nuclear podcast, hosted by Bret Kugelmass. The podcasts feature interviews with experts throughout the nuclear community, covering advanced technology, economics, policy, industry, and more.The wide-ranging discussion with Piercy tackled diverse subjects—from his Washington, D.C., policymaking background, to ANS’s role in addressing challenging nuclear issues, to waste management and climate change.Go to Article
Elettra designated an IAEA collaborating centerA collaborating center agreement was signed by Elettra Sincrotrone Trieste and the International Atomic Energy Agency in May. The agreement focuses on advanced light sources and will support countries in research, development, and capacity building in the application of advanced and innovative radiation technologies.Go to Article
Fact-checking Amazon's new season of BoschThe latest season of Amazon’s detective series Bosch premiered recently on its streaming service, Prime. The season opens with the murder of a medical physicist and the theft of radioactive cesium, with plenty of drama following as the protagonist tries to solve the murder and end the “catastrophic threat to Los Angeles.” The show is a work of fiction, but let’s take a closer look at the depiction of radiation to sort out the scientific facts.The setup: The series stars Titus Welliver as Los Angeles Police Department detective Harry Bosch and Jamie Hector as his partner, Jerry Edgar. The first episode of the sixth and latest season begins late in the evening at a Los Angeles hospital. We are shown a nervous-looking medical physicist as he walks into a laboratory, the camera dramatically focusing on the radiation sign on the door. No one else is around as the medical physicist clears out the lab’s inventory of what we find out later is cesium. The physicist then walks the material out of the hospital without anyone giving him a second look.Go to Article
Experimental Breeder Reactor I: A retrospectiveIn the not-so-distant 20th century past, our planet was in an uncertain new-world order. The second of two major wars had dramatically reshaped the landscape of the world's nations. It was not by any means assured that the extraordinary nuclear process of fission, which itself had been discovered mere years before the second war's end, would be successfully utilized for anything but the tremendous and frightening powers realized in thermonuclear warheads. In the years following, a humble project materializing out of the National Reactor Testing Station in Idaho was to challenge that assertion and demonstrate that nuclear fission could indeed be a commercial, peaceful source of electrical power for civilizations around the globe.Go to Article