@ Radic i el Safety CUTF .VEN No. 3-53 w rolations | » se @ film badges. (6) Crew members of aircraft in the air at zero hour will teke special precautions to avoid (for at least 10 seconds) the direct and reflected light resulting from the burst, it the discretion of the airplane com- mander this Soybe done with protective high density goggles, by turning away from the burst with eyes closed, Sf by covering the cyes with the forearm, by turning cockpit lights up to highest intensity or by any combination of the above. e, In air and water the following continuous levels of radioactivity are considered safe fron the viewpoint of personnel drinking and breathing (uc = microcurie): Beta-Garma Bnitter Water mos ‘ir (24-hour average) Particles less than 5 Particles greater " 5 x 1073 uc/ce (calcu~ Lated to H ~ 3 days) €ron diameter 10~6 uc/ce micron diameter 1074 uc/ce 16, In tactical situations the military commender must make the decision regarding alloweble exposures, As military personnel are normally sub- ject to only randum exposure, health hazards sre at a minimum, Current Department of Defense informetion on exposure to gamma radiation in tac- tical situations is indicated below: 2, . Uniform acute (immediate) exposure of 50 roentgens to a group of armed Forces personnel will not appreciably affect their efficiency as a fighting unit. b, Uniform acute exposure of 100 roentgens will produce in occasional individuals nausea and voriting, but not to en extent that will render ‘raed Forces personnel ineffective as fighting units, Personnel receiving an acute radiation exposure of 100 or more roentgcns should be given a period of rest and indivicual evaluation cs soon as possible, c, Uniform acute exposure of approximatcly 150 rocntgens or greater can