o available on the exposure of employees of the Reexy rlats facility and to relate this to the hot particle problem. J. R. Mann and R. A. Kirchner Giscuss the «esposures that resulted from a plutonium fire at Rocky Flats on 15 October 1965.°? Some 400 employces were working in the roem at the time the fire occurred. These employees were subsequently placed in a whole body counter to determine their lung burdens of Pu-239. However, Mann and Kirchner reported only on those 25 employees who were exposed above the MPLB of 0.016 uCi. Table V presents the information on the exposure of these 25 employees. by Mann Utilizing the other information presented and Kirchner, we have also estimated the fraction of tne lung burden activity in Table V (uCi) associated with hot particles and the number of hot particles that this represents. 63/ Mann, J.R. and R.A. Kirchner, Opn. cit, TOSS Paapae “3 : ree a “nee Ne EN ay rateee zt : an Ne _ : a a wage: fee é a ,Me:ot: 2 RRS a. a Roy owe .- i ' We Neon ot fA “ye o : hf cera HPs Stes a ' aE s .