Ct B . - 38 - Manhattan r Project Norkers Another study of human respiratory exvosure to plutonium (D - hates to 25 younas men exsosed to plutonium during the Manhattan Project. 66 The latest examination of this grous’ found then to be free of lung cancer although the report. states, "The bronchial cells of several subjects showed moderate to marxec metaplastic changes, but the Signific of these chances is not clear." cancer. etecting incislent or actual lung fh a possible indicator for Such metaplastic chances In one case the revort indicates Surorisad «2 find ome lung ca mon-exvoses sudiects. fara conductes with . An averace During these results: MDA for a 2000-saz counting time is Boclt li if one usez tne 953 confidence level.?? For tn2 33% ccntidence leval ana 2 Similar counting time, 222 comcaraple value is about 3.5 rci. : : 1 a ‘ . he an DM ‘ ie 15/ Hamclanann, O.N., 2b 21,, “Mannaloan srojyecs Plutani favkears; A Tweatv-seven Y2ar Follow-Ups Study of Selectad