ПЦНУ; практически целесообразный низкий уровень(Risks are as low as is reasonably practicable when: there is a gross disproportion between the cost (in money, time or trouble) of additional risk reduction measures, and the reduction in risk they would achieve; the cost of reducing the risks further are grossly high compared with the benefit gained)
разумно достижимый низкий уровень(Американский вариант британского ALARA, британцы признают эквивалентность: "what is "Reasonably Practicable" has a legal definition but what is "Reasonably Achievable" does not. In practice, ONR (UK) considers the ALARA and ALARP concepts to be equivalent" Wakeful dormouse)
