linear no-threshold model (LNT)
선형 무역치 모델
A dose-response model assuming a linear, proportional relationship between ionizing radiation dose and stochastic health effects such as cancer, with no threshold below which risk is zero. Every exposure, however small, carries a probability of harm that accumulates over a lifetime; adopted by the ICRP, UNSCEAR, and most national regulators as the conservative basis for radiation protection standards. Criticized for being statistically undetectable at low doses and inconsistent with DNA repair mechanisms, it sits at the center of the Chernobyl death-toll dispute.
Sources
- Wikipedia (EN) comprehensive article on LNT model history, definition, regulatory adoption, and controversy
- Wikipedia (RU) Russian article describing линейная беспороговая концепция (ЛБК) as the conservative ICRP-adopted model
- pmc.ncbi.nlm.nih.gov Wojcik & Zölzer (2024) in Radiation and Environmental Biophysics: LNT as a scientific hypothesis rooted in the precautionary principle, with overview of UNSCEAR and ICRP positions
- unscear.org UNSCEAR 2000 Annex G: biological effects at low radiation doses, noting the linear no-threshold assumption adopted by national and international bodies
- kjnmt.org Korean Journal of Nuclear Medicine Technology (2024): 선형무역치모델의 이해, defining LNT as '방사선피폭으로 인한 암발생은 역치가 존재하지 않고 선형성을 보인다'