Radiological Safety Regulations CUTF SEVEN Noe 1-53 Water Air Beta or Gamma Emitter Long-lived Alpha Enitters 5x 10° % 3 uc/ec (at H-3 days) 1077uc/ee 10° uc/ce 5x 10°~ uc/ee NOTE; In air for any 24 hour period after a shot, 10-4 uc/ee of which particles less than 5 microns shall not exceed 10-6 uc/cc) 13.2 All radiological safety operations for Operation CASTLE will be con- sidered as routine and will comply with permissible radiological exposures for routine work, except "special operations" which must be specifically designated by CUTF SEVEN. In tactical situations the military commander must make the decision regarding allowable exposures. As military personnel are normally subject to only randun exposure, health hazards are at a minimum. Current Department of Defense information on exposure to gamma radiation in tactical situations is indicated below: ao Uniform acute (immediate) exposure of 50 roentgens to a group of Armed Forces personnel will not appreciably affect their efficiency as a fighting unite be Uniform acute exposure of 100 roentgens will produce in occasional individuals nausea and vomiting, but not to an extent that will render Armed Forces personnel ineffective as fighting units. Personnel receiving an acute radiation exposure of 100 or more roentgens should be given a period of rest and individual evaluation as soon as possible. co Uniform acute exposure of approximately 150 roentgens or greater can be expected to render Armed Forces personnel ineffective. as troops ing, weakness and prostration. Mortality produced by an acute exposure of 150 roentgens will be very low and eventual recovery of physi- cal fitness may be expectedo do Field commanders should, therefore, assume that if substantial numbers of their men receive acute radiation exposures substantially above 100 roentgens there is a. grave risk that their commands will rapidly become ineffective as fighting units. e€o Internal radiation hazards caused by entry of radioactive substances through the mouth, through the lungs or through cuts or wounds do not exist after an air burst. Internal hazards following a contaminating surface explosion may be avoided if ordinary precautions are taken. Only under unusual circumstances will there be internal hazard from residual contamination. This eliminates the necessity for masking and consequent reduction of tactical efficiency. 14. This appendix has been designed for reduced security classification in order to facilitate wide dissemination. OFFICIAL: Ab beats AM S. zoe Colonel, UeSe Ai orce Assistant Chief of Staff, J-3 P. Wa CLARKSON Major General, UeSe Army Commander ; I~I-5 roe within a few hours through a substantial incidence of nausea, vomit~