xT occurred and that application of accepted radiological safety measures unnecessarily upped the requirements for manpower, lessened the readiness of crews and aircraft for tests and that the entire decontamination program was more than actually required to insure safety. Officials of the Los Alamos Scientific Laboratory took exceptions to Colonel William B.Kieffer's proposed changes to their equally cautious safety procedures, and resulting correspondence recorded a thorough disagreement and conflict between the nuclear scientists and operational people. In early March, 1957, Harold Plank wrote: "For workers who are occupationally exposed on a year-round basis » it is expected that the total non-medical exposure to gamma radiation will: be . limited to five roentgens per year with a general requirement thatthe exposure up to the age of 30 years be limited to fifty roentgens. and. that no more than fifty roentgens be received. in, each subsequent decade, It is understood that these restrictions are motivated, by, concern for. the genetic effects of radiation throughout the population at large. rather than by considerations of effects on the health of the exposed individual ,* He then laid down the limitations for the then planned tests, PILGRIM, TRUMPET, and HARDTACK, _ We would like to propose that the sampling pilots for PILGRIM_he restricted to 3.9 (plus or minus 10 per cent) roentgens but that, whenever possible, the actual exposures be limited to 2. roentgens. A prudent alternative which would minimize the pilots required for PILGRIM, would be to observe an actual limit of 3.9 roentgens on PILGRIM, bring these persons to a yearly total of five roentgens during TRUMPET, and meet the balance of the TRUMPET requirements with new pilots, Each of these new pilots would be allowed five roentgens, The number of new pilots needed might be 231 AFWL/HO AFWy,. SWEH-2 -003) 150° tT . ae