-- RETYPED COPY -- HEADQUARTERS, Joint Task [Force SEVEN Washington, 25 D.C. 10 November 1953 Appendix I to Annex N Radiological Safety, CJTF SEVEN Operation Plan No. 3-53 RADIOLOGICAL SAFETY REGULATIONS l. General a. Radiological Defense (RadDefense) operations or Radiologd ical Safety (RadSafe) operations, short term RadOps, are general terms, They are used to denote the means by which a unit can control and c damage and radiological effects of an atomic explosion or active material spread by other means, thereby preventing health hazards to personnel. They are interpreted to incl Such aS training, organization, distribution of radiologic nel, development of techniques and procedures, use of dete ment, protection or removal of exposed personnel and decon of personnel, structures and equipment. fine the a radiod avoiding e measures personing equipmination b. Following each detonation there will be areas of surfac radiologiThese cal contamination and areas of air radiological contaminati n. areas are designated as Radiological Exclusion Areas (RADE . Prior to shot times, the forecast air and surface RADEX will be isseminated by CUJTF SEVEN in the target area. These RADEXES will repr ent a forecast from H Hour until dissemination of a later surface an air RADEX at about H plus 4 hours. The later RADEXES will be based on the Master radiological “situation map" maintained in the RadS e Office of CJTF SEVEN. Since the air RADEX after shot times will based on monitored tracking by aircraft over significant large ocea areas, information promulgated from the forecast air RADEX may have o be extended beyond the originally anticipated 4 hour period. c. The surface RADEX will be determined by actual survey wi h Radiation Detection, Indication and Computation (RADIAC) equipme t after shot time. The most rapid method of accomplishing surface urvey in the early stages will be by helicopter flight in and aroun the surface of contaminated areas. From the radiation intensities measured at a known altitude, it is possible to obtain an estimate o the radiation dosage rates which would be encountered on the surfac of the ground or water. Actual water samples from the lagoon will also be utilized. Ground survey will follow these guides to deter ne definitely the contaminated regions and objects. Formal ground survey of the shot atoll, as feasible, will be accomplished on H plus 24 hours. The Maximum Permissible Exposures (MPEs) and Maximum Permis ible Limits (MPLs) as stated herein are applicable to a field experimen 451 al test of