The fact that there is no level of radiation which can be proven to cause no harm means that the international commission for radiological protection icrp recommends that no practice involving radiation be undertaken unless it is likely to bring a net benefit and that for any such practice , exposure should be kept as low as reasonably achievable alara principle , economic and social considerations being taken into account 由于任何辐射量都不能确保绝对安全，国际放射防护委员会在考虑经济及社会因素后，建议尽量避免涉及辐射的治疗或行为，除非所得的益处较辐射引致的坏影响大，并且在进行的过程中，应把辐照量维持在可合理使用最低剂量alara原则。
The international commission for radiological protection icrp estimates that an additional death rate of 12 . 5 persons per million for every msv of exposure . this means that if a million people were given 2 msv of radiation , the expected additional death rate from cancer would be 25 additional persons or 230 , 025 instead of 230 , 000 persons out of a million dying from naturally occurring cancer 据国际放射防护委员会估计，每一百万人每接触到一毫西韦特辐照量所引致的死亡率增幅为12 . 5 % ，换言之，如一百万人接触到两毫西韦特的辐射，因死亡的人数估计会增加二十五人，亦即每一百万人会有二十三万零二十五人自然死于癌症。
The international commission on radiological protection icrp considers that if the annual radiation doses to the lens of the eyes of radiation workers are restricted to 150 msv equivalent to 150 mgy for x - ray , cataract is unlikely to occur during his her life assuming a working period of 50 years 国际辐射防护委员会icrp认为，辐射工作者的眼晶体所受剂量只要限制在每年150毫希以下对于x射线，等于150毫戈以下，因辐射诱发的白内障在他她一生中假设工作五十年都不会出现。
However , such a model only takes into account some certain factors , and do not touch uncertain factors such as social factor and public psychology etc . , which are but of importance in the nuclear emergency decision - making system . any decision on counter - measures to protect the public should be made based upon the basic pr 而这些因素在核应急决策中相当重要，任何保护公众的对策都必须建立在icrp推荐的基本原则上，这些原则的应用需要在费用与辐射方面的比较，考虑很多主观因素和不确定因素。
To ensure that no individual is exposed to radiation risks that are judged to be unacceptable . in the unlikely event of a nuclear accident resulting in an increase of environmental radiation level , both icrp publication no . 60 and no . 63 recommended implementation of interventions i . e . human activities to reduce the overall exposure by altering the existing causes of exposure . the basic principles for intervention are 对于因核意外而令自然环境辐射水平增加，国际放射防护委员会在其一九九零年的建议书第60号刊物及一九九一年的建议书第63号刊物内，均建议需进行干预即通过某些活动影响已存在的照射原因，从而降低总照射量，保障受到影响的人的健康，其防护原则为：
The international commission on radiological protection ( icrp ) considers that if the annual radiation doses to the lens of the eyes of radiation workers are restricted to 150 msv ( equivalent to 150 mgy for x - ray ) , cataract is unlikely to occur during hisher life assuming a working period of 50 years 国际辐射防护委员会( icrp )认为，辐射工作者的眼晶体所受剂量只要限制在每年150毫希以下(对于x射线，等于150毫戈以下) ，因辐射诱发的白内障在他她一生中(假设工作五十年)都不会出现。
