$F SEGRET -~15- near the source). Dr, Bugher said there exist no unequivocal data on this question, that it is very hard to study experimentally since human subjects cannot be used. He said that at the moment the data do not support the idea that particles are more dangerous than an / evenly distributed source, Dr. Wigner pressed for data on mice but none were available. | In answer to Dr. Rabi, Dr. Kramish said that there are considerable fluctuations in fall-out density in the U.S., by a factor of about 100. Dr. Whitman pointed out that arable land might have a greater than average fall-out, since it tends to receive more rain and also tends to be near to targets. It was suggested that there may be a possibility of prophylactic control of the Sr-90 hazard by feeding people more strontium (natural and in some cases, more calcium. At 4:20 p.m. Dr. Smyth and Mr. Murray joined the meeting. Dr. Kramish emphasized the importance of obtaining accurate infornation on the parameters which enter the Sunshine calculations. It appears Recom- possible to obtain very valuable data on many of the integral features of of Sunshine the problem by instituting a world-wide sampling program for Sr-90, since mendations Project, Sampling Program the amount which has already been released (about 10 kilogrems) is probably sufficient to be detectable in samples of inert and biological materials throughout the world. In addition, data are required on the natural strontium content of scils, waters and biological materials. The Sunshine Project believed it wes very important to carry out such a Ri & b wy F a pa ri RA “4 pee beg maey PY Rr Fa sampling program, and that 2 pilot plant phase should be initiated as soor.

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