放射性核素的毒性重新分组

RECLASSIFICATION OF TOXICITY FOR RADIONUCLIDES

本文参照国内外已报道的分组界限值和国内以往的分组经验，对国际原子能机构（ＩＡＥＡ）安全丛书第１１５号中列出的９４种元素的８５１种放射性核素进行了毒性分组，建立放射性核素数据库ＮＤＢＡＳＥ并编制了计算机程序ＣＴＯＸＩ。根据国际放射防护委员会（ＩＣＲＰ）第６０号和第６６号出版物，对每一种核素，按它的吸收速率类别，共分组１４３５个核素次，其中极毒组占４．５％，高毒组占５．４％，中毒组占３８．０％，低毒组占５２．１％。

Based on the reported classifications, 851 radionuclides of 94 elements listed in IAEA Safety Series No. 115 were reclassified for toxicity. The database NDBASE was established and the computer code CTOXI developed. According to ICRP Publications 60 and 66, each radionuclide was divided into F, M, S classes based on its inhalation speed in the lung, and gas and vapours form. In all 1 435 radionuclide cases considered, there was 4.5% in the extreme toxicity group, 5.4% in the high one, 38.0% in the moderate one, and 52.1% in the low one. (