latter program seemed too advanced at this time to permit: tye changes, Mr. Libby said he intended to discuss the present *~* stage of fallout studies planned for Operation HARDTACK during his forthcoming meeting with Mr, Alvin Graves at LASL. He said he had also been conferring with Dr. Dunham regarding organizational changes which were needed in the SUNSHINE Progr: and about the selection of a qualified director for the prograr The Commissioners then discussed the amount of fallout expected from Operation HARDTACK. Mr. Libby said he had estimated that, based upon the presently scheduled twenty-five shots, offsite fallout would total 9,6 megatons as compared to approximately 6 megatons resulting from Operation REDWING. Mr. Libby requested the staff to prepare an independent estimate o: total offsite fallout for Operation HARDTACK to verify his figures. Mr, Strauss said he had understood that the expected fallout for Operation HARDTACK would not exceed that contribute ‘ by Operation REDWING, He suggested as one of the goals of. . te 8 : te oe HARDTACK that the amount cf fission product contamination‘{Wie resuiting from the test series be limited so that the peak of vorld wide stratospheric radioactivity established by any previous U. S, test cerles would not be exceeded. Furthermore. he pointed out that he hed received instructions from the President to reduce the number of shots to less than twenty-fii and suggested, therefore, that the weapons laboratory director: meet with the Commission during September to discuss which shots might be eliminated. (See Minutes of Meeting 1300.) He also proposed that the DOD be consulted concerning a revisic of their present requirement for five weapons effects test sho’ liv, Libby suggested that,.in order to reduce fallout, \e consideration be given to using smaller or cleaner weapons in

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