‘ ~ 46 ~ be considered as acceptable limits, or whether design basis are “of Ft; accidents that are currently evaluated under these criteria exceedincly low probability of occurrence," we recommenc that 19 CFR 100.11(a) (1) be modified as follows in order to establish a hot particle stancard that is equivalent to the risk associated with 25 rem whole body irradiation: {1) An exclusion area of such size that an incividual located az any point cn its boundary for two hours immediately following onset of the postulated fission croduct or othar radionuclide reigase woulc not receive a total radiation dose tm excess of 25 rem* or a total raciazi ss of 300 rem’ to the sayrois irom iocine exocsure, or receive a lunc Darzticla burien in excess of 19 aot sarticles.3 ~2 33 Act particle is a particle tnat contains Suliicient ectivity to deliver at leas: 1000 ren/yr to the surrounding lung tissue. Tor isotovces nNaving nali-lives creater than cne vear, this would correstons to varticles containing at least 0.07 pCi si alisha activity. &lsc racommend that similar criteria be established limiting nor variicle releasas now coverei under 10 CFP th we or nuclear facilities not 1994. 2s devositec on land suriaces can ba nis cna air Sy anv number of means, including Followins on rl2 traffic, nauman or imical movements, ee em ne + on were vate oe aro, wera. Co etemarrpee rt pe . sae” cee anat