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The sievert is a unit in the International System of Units (SI) intended to represent the stochastic health risk of ionizing radiation, which is defined as the probability of causing radiation-induced cancer and genetic damage. The sievert is important in dosimetry and radiation protection. It is named after Rolf Maximilian Sievert, a Swedish medical physicist renowned for work on radiation dose measurement and research into the biological effects of radiation.
A nuclear and radiation accident is defined by the International Atomic Energy Agency (IAEA) as "an event that has led to significant consequences to people, the environment or the facility." Examples include lethal effects to individuals, large radioactivity release to the environment, or a reactor core melt. The prime example of a "major nuclear accident" is one in which a reactor core is damaged and significant amounts of radioactive isotopes are released, such as in the Chernobyl disaster in 1986 and Fukushima nuclear disaster in 2011.
Health physics, also referred to as the science of radiation protection, is the profession devoted to protecting people and their environment from potential radiation hazards, while making it possible to enjoy the beneficial uses of radiation. Health physicists normally require a four-year bachelor’s degree and qualifying experience that demonstrates a professional knowledge of the theory and application of radiation protection principles and closely related sciences. Health physicists principally work at facilities where radionuclides or other sources of ionizing radiation are used or produced; these include research, industry, education, medical facilities, nuclear power, military, environmental protection, enforcement of government regulations, and decontamination and decommissioning—the combination of education and experience for health physicists depends on the specific field in which the health physicist is engaged.
The linear no-threshold model (LNT) is a dose-response model used in radiation protection to estimate stochastic health effects such as radiation-induced cancer, genetic mutations and teratogenic effects on the human body due to exposure to ionizing radiation. The model assumes a linear relationship between dose and health effects, even for very low doses where biological effects are more difficult to observe. The LNT model implies that all exposure to ionizing radiation is harmful, regardless of how low the dose is, and that the effect is cumulative over lifetime.
The mineral asbestos is subject to a wide range of laws and regulations that relate to its production and use, including mining, manufacturing, use and disposal. Injuries attributed to asbestos have resulted in both workers' compensation claims and injury litigation. Health problems attributed to asbestos include asbestosis, mesothelioma, lung cancer, and diffuse pleural thickening.
The United States Radiation Exposure Compensation Act (RECA) is a federal statute implemented in 1990, set to expire in July 2024, providing for the monetary compensation of people, including atomic veterans, who contracted cancer and a number of other specified diseases as a direct result of their exposure to atmospheric nuclear testing undertaken by the United States during the Cold War as residents, or their exposure to radon gas and other radioactive isotopes while undertaking uranium mining, milling or the transportation of ore.
The 1986 Chernobyl disaster triggered the release of radioactive contamination into the atmosphere in the form of both particulate and gaseous radioisotopes. As of 2024, it was the world's largest known release of radioactivity into the environment.
Chernobyl liquidators were the civil and military personnel who were called upon to deal with the consequences of the 1986 Chernobyl nuclear disaster in the Soviet Union on the site of the event. The liquidators are widely credited with limiting both the immediate and long-term damage from the disaster.
The Ionising Radiations Regulations (IRR) are statutory instruments which form the main legal requirements for the use and control of ionising radiation in the United Kingdom. There have been several versions of the regulations, the current legislation was introduced in 2017 (IRR17), repealing the 1999 regulations and implementing the 2013/59/Euratom European Union directive.
The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) was set up by resolution of the United Nations General Assembly in 1955. Twenty-one states are designated to provide scientists to serve as members of the committee which holds formal meetings (sessions) annually and submits a report to the General Assembly. The organisation has no power to set radiation standards nor to make recommendations in regard to nuclear testing. It was established solely to "define precisely the present exposure of the population of the world to ionizing radiation". A small secretariat, located in Vienna and functionally linked to the United Nations Environment Programme (UNEP), organizes the annual sessions and manages the preparation of documents for the committee's scrutiny.
Fairchild v Glenhaven Funeral Services Ltd [2002] UKHL 22 is a leading case on causation in English tort law. It concerned malignant mesothelioma, a deadly disease caused by breathing asbestos fibres. The House of Lords approved the test of "materially increasing risk" of harm, as a deviation in some circumstances from the ordinary "balance of probabilities" test under the "but for" standard.
Barker v Corus (UK) plc [2006] UKHL 20 is a notable House of Lords decision in the area of industrial liability in English tort law, which deals with the area of causation. In this case, the House of Lords reconsidered its ruling in the earlier landmark case Fairchild v Glenhaven Funeral Services Ltd concerning the liability of multiple tortfeasors.
An atomic veteran is a veteran who was exposed to ionizing radiation while present in the site of a nuclear explosion during active duty. The U.S. Department of Veterans Affairs defines an atomic veteran "who, as part of his or her military service: Participated in an above-ground nuclear test, 1945–1962; or was part of the U.S. military occupation forces in/around Hiroshima/Nagasaki before 1946; or was held as a POW in or near Hiroshima or Nagasaki ."
The Energy Employees Occupational Illness Compensation Program Act (EEOICPA) was passed by Congress in 2000 and is designed to compensate individuals who worked in nuclear weapons production and as a result of occupational exposures contracted certain illnesses. EEOICPA was signed into law by President Bill Clinton on October 30, 2000.
Radiation dose reconstruction refers to the process of estimating radiation doses that were received by individuals or populations in the past as a result of particular exposure situations of concern. The basic principle of radiation dose reconstruction is to characterize the radiation environment to which individuals have been exposed using available information. In cases where radiation exposures can not be fully characterized based on available data, default values based on reasonable scientific assumptions can be used as substitutes. The extent to which the default values are used depends on the purpose of the reconstruction(s) being undertaken.
The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) is a regulatory agency under the Commonwealth of Australia that aims to protect Australian citizens from both ionising and non-ionising radiation. ARPANSA works under the guidance of the Australian Radiation Protection and Nuclear Safety Act of 1998 as the national regulatory body of radiation in Australia, with independent departments within each state and territory that regulate radiation within each of their jurisdictions.
Exposure to ionizing radiation is known to increase the future incidence of cancer, particularly leukemia. The mechanism by which this occurs is well understood, but quantitative models predicting the level of risk remain controversial. The most widely accepted model posits that the incidence of cancers due to ionizing radiation increases linearly with effective radiation dose at a rate of 5.5% per sievert; if correct, natural background radiation is the most hazardous source of radiation to general public health, followed by medical imaging as a close second. Additionally, the vast majority of non-invasive cancers are non-melanoma skin cancers caused by ultraviolet radiation. Non-ionizing radio frequency radiation from mobile phones, electric power transmission, and other similar sources have been investigated as a possible carcinogen by the WHO's International Agency for Research on Cancer, but to date, no evidence of this has been observed.
The Fukushima Daiichi nuclear accident genshiryoku hatsudensho jiko) was a series of equipment failures, nuclear meltdowns, and releases of radioactive materials at the Fukushima I Nuclear Power Plant, following the Tōhoku earthquake and tsunami on 11 March 2011. It was the largest nuclear disaster since the Chernobyl disaster of 1986, and the radiation released exceeded official safety guidelines. Despite this, there were no deaths caused by acute radiation syndrome. Given the uncertain health effects of low-dose radiation, cancer deaths cannot be ruled out. However, studies by the World Health Organization and Tokyo University have shown that no discernible increase in the rate of cancer deaths is expected. Predicted future cancer deaths due to accumulated radiation exposures in the population living near Fukushima have ranged in the academic literature from none to hundreds.
Nuclear labor issues exist within the international nuclear power industry and the nuclear weapons production sector worldwide, impacting upon the lives and health of laborers, itinerant workers and their families.
References
- ↑ The Redfern Inquiry into human tissue analysis in UK nuclear facilities. The Stationery Office. 2010-11-16. ISBN 9780102966183.
- 1 2 "CSRLD: The Compensation Scheme for Radiation Linked Diseases - Scheme history". www.csrld.org.uk. Archived from the original on 2016-09-17. Retrieved 2016-09-26.
- ↑ "CSRLD: 2015 Compensation Scheme Annual Statement". www.csrld.org.uk. Government of the United Kingdom. 2015-12-01. Archived from the original on 2016-09-27. Retrieved 2016-09-26.
- 1 2 "Annual Statement". www.csrld.org.uk. Retrieved 2023-01-17.
- ↑ "CSRLD: The Compensation Scheme for Radiation Linked Diseases - Scheme employers". www.csrld.org.uk. Archived from the original on 2016-06-06. Retrieved 2016-09-26.
- ↑ Health Risks from Exposure to Low Levels of Ionizing Radiation. National Academies Press. 2006. doi:10.17226/11340. ISBN 978-0-309-09156-5.
- ↑ "UNSCEAR 2006 Report Volume I".
- ↑ "CSRLD: The Compensation Scheme for Radiation Linked Diseases - Q & A". www.csrld.org.uk. Archived from the original on 2016-06-06. Retrieved 2016-09-26.
- ↑ "CSRLD: The Compensation Scheme for Radiation Linked Diseases - Case Processing". www.csrld.org.uk. Archived from the original on 2016-06-06. Retrieved 2016-09-26.