Jackson D, Lambers B, Gray J
Westlakes Scientific Consulting Limited, Cumbria, UK.
J Radiol Prot. 2000 Jun;20(2):139-67. doi: 10.1088/0952-4746/20/2/302.
Liquid wastes containing low levels of radioactivity have been discharged to the Irish Sea from the nuclear fuel reprocessing site at Sellafield since operations began in the early 1950s, and monitoring of radioactivity in foodstuffs has been undertaken over many years. Based on the best available monitoring data, supplemented by modelled values where necessary, doses to local critical groups have been reassessed using the most recent dosimetry. Contemporary habits data have been used where available, again supplemented by assumed habits where necessary. During the 1950s and 1960s the highest doses were received by individuals consuming Cumbrian Porphyra as laverbread, and peak doses around 0.8 to 1.0 mSv year(-1) have been estimated. During the 1970s and 1980s the critical exposure group switched to consumers of local fish and shellfish, with peak doses possibly reaching 2.5 to 3.0 mSv year(-1). Latterly, doses to all marine-related groups have declined to less than 150 to 200 microSv year(-1). At all times, doses have been within the appropriate limits set for members of the public.
自20世纪50年代初开始运营以来，含有低放射性的液体废物一直从塞拉菲尔德的核燃料后处理厂排放到爱尔兰海，并且多年来一直在对食品中的放射性进行监测。基于现有的最佳监测数据，并在必要时辅以模型值，已使用最新的剂量测定法对当地关键人群的剂量进行了重新评估。在可获得当代习惯数据的情况下使用了这些数据，必要时同样辅以假定的习惯数据。在20世纪50年代和60年代，食用坎布里亚紫菜作为海苔面包的个人受到的剂量最高，估计峰值剂量约为0.8至1.0毫希沃特/年。在20世纪70年代和80年代，关键暴露人群转向当地鱼类和贝类消费者，峰值剂量可能达到2.5至3.0毫希沃特/年。最近，所有与海洋相关人群的剂量已降至低于150至200微希沃特/年。在任何时候，剂量都在为公众成员设定的适当限值之内。
