- 49 - ; _- -~an accident wherein surfaces are contaminated with hot particles, it is necessary to have a standard to apply to - : Gecontamination measures. The number of particles that can be resuspended from surfaces has been the subject of a number of experiments. These experiments have usually resulted in the determination of a resuspension factor (RF). The RF is defined by: -1l) = concentration in air (uCi/m3) RF (n™") concentration on surface (uCi/m-) . R. L. Kathren has reviewed the data obtained on RF values, 83 He indicates that, “reported [RF] values for plutonium and its compounds range over 11 orders of magnitude.“ This 11 erders corresponds to values between ic71l to 10-11 mol, Kathren indicates that, "an RF of 1074 m7i, although conservative is appropriate. 84 Langham indicates that a ~——_—. member of the Danish scientific team used an RF=107? ml during the Thule deliberation. 85 We weuld recommend that 83/ Kathren, R.L., "Towards interim accertable suriace contamination levels for environmental Pu02," BNWL-SA-1510, Battelle Northwest Laboratory, Richland, Washington, April 1968, pr. 3-4. 84/ Ibid, p. 4. 85/ Langham, Wright H., Op. cit., p. 5. The Thule ule Delinecra- ‘tions refer to the @eliberations following the accidental crash of a B-52 bomber carrying nuclear wearons ncar Thuis Air Force Base in Greenland. The hich emplosives in the weapons detonated and dispersed the plutsniun.