-- RETYPED COPY -HEADQUARTERS, Joint Task Fe rece SEVEN Washington 25, D.C. 20 June 1953, 1600 R Appendix to Annex I Radiological Safety, CJTF SEVEN Operation Order No. 1-53 RADIOLOGICAL SAFETY REGULATIONS 1. The Maximum Permissible Exposure (MPE) for personnel involved in this operation is 3.9 roentgens, gamma only, unless reduced becau vious or anticipated future exposure. All exposure to exter radiation will be regarded as total body irradiation. of pre- Speci 20 roengtens, gamma only, is authorized for crew members of pling aircraft. The maximum permissible exposures as stated applicable to a field experimental test of nuclear devices i time, wherein numbers of personnel engaged in these tests ha previously exposed or will be continuously exposed to potenti tion hazards. It may become necessary from a study of person ords to reduce the MPE for certain individuals who have parti recently in other atomic tests. Under a military tactical si or emergency the maximum permissible exposures above do not a All atoll land and lagoon areas in or near which a detonation place will be considered contaminated until cleared for opera the task force commander. Entry to and exit from contaminate will be via RadSafe checkpoints only. Contaminated land areas of intensities greater than 100 mr/hr delineated as such; Personnel entering these areas must be ac hy a monitor and will be subject to clearances by the RadSafe Officer, TG 7.1. RadSafe clothing and equipment will be issued to the personnel. Contaminated land areas of intensities less than 100 mr/hr ang greater than 10 mr/hr will be controlled areas; Personnel entering th se areas Moniwill be subject to clearance by the RadSafe Officer of TG 7.1) tors will not be required for entry into these controlled are Ss. Contaminated land areas of intensities of less than i0 mr/hr ¥y ill be within considered unrestricted from a RadSafe viewpoint. Areas comi this limitation will be designated specifically by CJTG SEVEN rior to con e unrestricted entry. RadSafe monitors assigned to individuals or groups working in nated areas or with contaminated equipment during recovery op will act in an advisory capacity to keep the recovery party 1 440 ontamiations der