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Perspective on the Use of LNT for Radiation Protection and Risk Assessment By The U.S. Environmental Protection Agency

机译:美国环境保护署关于使用LNT进行辐射防护和风险评估的观点

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摘要

The U.S. Environmental Protection Agency (EPA) bases its risk assessments, regulatory limits, and nonregulatory guidelines for population exposures to low level ionizing radiation on the linear no-threshold (LNT) hypothesis, which assumes that the risk of cancer due to a low dose exposure is proportional to dose, with no threshold. The use of LNT for radiation protection purposes has been repeatedly endorsed by authoritative scientific advisory bodies, including the National Academy of Sciences’ BEIR Committees, whose recommendations form a primary basis of EPA’s risk assessment methodology. Although recent radiobiological findings indicate novel damage and repair processes at low doses, LNT is supported by data from both epidemiology and radiobiology. Given the current state of the science, the consensus positions of key scientific and governmental bodies, as well as the conservatism and calculational convenience of the LNT assumption, it is unlikely that EPA will modify this approach in the near future.
机译:美国环境保护局(EPA)基于线性无阈值(LNT)假设,针对人群暴露于低水平电离辐射的风险评估,监管限制和非监管准则,该假设假设低剂量导致的癌症风险暴露与剂量成正比,没有阈值。 LNT用于辐射防护已得到权威科学咨询机构的认可,其中包括美国国家科学院的BEIR委员会,其建议是EPA风险评估方法的主要基础。尽管最近的放射生物学发现表明低剂量的新型损伤和修复过程,但流行病学和放射生物学的数据都支持LNT。考虑到当前的科学状况,主要科学和政府机构的共识立场以及LNT假设的保守性和计算便利性,EPA在不久的将来不太可能修改此方法。

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