CRLR - 603 - SURVEY OF RW AGENT AVAILABILITY FROM INDUSTRIAL POWER REACTORS, 1960-1980 (C). luther M. Hardin, 3 April 1956. SECRET-RESTRICTED DATA, Special Report A survey of the availability of the Zr79-Nb?? fraction of the waste fission products from reactors used for the production of 1. Waste fission products resulting from the industrial reactor program can serve as a source of RW agent material. 2. The amount of Zr??-Nb?? resulting from nuclear reactors by OP eepeW commercial power in the period 1960 to 1980 is reported. Production of fission products at present AEC installations is not considered. Conclusions drawn from this work are as follows; 1965 will be several times that of the estimated present capability of AEC production facilities, and by 1980, greater than in 1965 by an additional factor of 20. 3. It is predicted that there could exist an RW stockpile large enough to contaminate fifteen 20-sq mi targets in 1965 and three hundred thirty-five 20-sq mi targets in 1980 to a level of 5 megacuries/. sq mi; and an RW production rate large enough to contaminate three additional er targets per month in 1965 and 70 additional targets per month in 1980. 4k. ly The estimated quantity of Zr99-Nb?? to be produced by 1965 is sufficiently large to warrant the early resumption of a research and development program geared to the development of a prototype agent-munition delivery system in 1965. ty CRLR - 607 - APPLICATION OF RECIPROCITY TO GAMMA-RAY SHIELDING STUDIES (¥). Ralph R. Fullwood and Donald R. Roberts, 28 March 1956. UNCLASSIFIED, Special Report (u) The attemation of gamma radiation by common structures is studied on the basis of reciprocating source and detector. The solution for an infinite plane field of radiation outside the structures is obtained by using the observation point as an influence function. The mathematics necessary to apply the reciprocity theory are developed. The attenuation of three buildings is obtained umder conventional and reciprocal techniques. Suggestions for the improvement of the agreement between the two techniques are made and the advantages of the reciprocal technique are discussed, merit. ATOM REST It is concluded that the reciprocal method appears to have TA 954 Pe _ ‘ ‘ :