~hUniform acute dosage of 100r will produce in cccasional individuals nangea end vomiting, but not to an extent that will render Arned Forces personnel at any time ineffective as fighting wiita. Troops receiving an acute racinticn dose of 1OOr and above ought to be given, as soon as feesible (within a weak, if possible), a period for rest and individual @Valustion. Unilerm acute dossze approximately 150r or greater can be expected rapidly (in a few hours) to render armed forcespersonnel as a group ineffective as trooss through as ubstuntial ineduence of nausea, vomiting, weakness and prostr:tion. Uortality produced Ly amacute dose of 1o0rwill be very low and eventual recovery of physical fitness usually may be expected. Field officers sneuld thorafcre assume that if substantial numbers of their nen receive acute madi.tion doses substantially above 100r, there is grave risk that their communis will repidly become ineffective as fighting Question 2. “hat desave will render an air crew inefficient, that ia, wnable to complete a mission, curing a flight of cne to three hours, four to twelve hours, twelve to fo.ty-aight hours? answer of the Comaittee: In all three cases if radiation dosare to flight crew embers is hald below 75r, radiation exposure will be unimportant dn determining the guecess or failure of a mi-sicon provided the crew nembers had net previously received an appreciable amount of radiation. In all three cases reciation doses substantially above 75r, combined with human stresses associated with military aviation missions in wartime, are considered to very seriously reduce the odds for successful completion of meission. Question 3. How often may an aircraft crew accept an exposure of 25r per mission and still be a reasonnble risk for subsequent missions? fnewer ofthe Committee - It is probable that at least eight nissions ea be corried cut al weekly or longer intervals, sith exposure of @5r per m asion, befors the chance of wigsicn failure becores Large cue either to Sllness during the mission or significant general deterLoration in health and apliity. “ore m ssions may be feasible, but personnel should becare~ fully checked anc evaluated before each mission end particularily before a decision to perm t greater exposure then 200r totel inthese divided doses ig made. The poasibility should not be ignored that cumnictive radi«tion doses to the entire body above 200r may ~ substantially reduce the life expectancy of the irradicted individual, question hk. A submarine crew are receiving 2S5r per mission. missions should they be allowed to make? How many 16—56565-1 OFFICE > GPO