Col, Huston reviewed the report and recommendations of the NPG Nevada Proving Grounds Committee. The recommendations included: (1) restriction of the number of nuclear shots in any 12-month period to: a planning maximumof 10 to 15; (2) each shot to be “justaried individually as to technical necessity and. | probable off-site hazard; (3) shot sizes to be less than 1 KT for surface or pubsurtace, 25 KT for 300-foot tower; 50 KT for 500-foot tower, 80 KT for airdrop (fireball not to touch the ground). brs Claus quoted from a letter Promthe Biology and Medicine Advisory Committee to Mr. Murray which recommended a planned maximum of 10 shots in any 12-month period. Mr, Murray expressed the strong belief that the NPG should continue to be used, He felt it important that no indication of hesitation be given; any such indication wouldendanger the continued use of the site, The Committee considered the recommendations about the NPG to be sound with the exception of the 10-shot limitation. There seemed no rational basis for selecting this as the maximum number, Dr. von Neumann felt it would be best not to prescribe a limiting number, but rather to consider each proposed shot per se, At 4:10 p.m, the visitors left except for Dr. Froman, Mr. Murray, Dr. Claus and Dr, Dunham. wereo Castle Tests

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