HEADQUARTERS, Joint Task Force SEVEN Washington 25, De Ce 20 June 1953, 1600 R A ndix to Annex JI Radiological Safety, CJTF SEVEN Operation Order No. 1-53 RADIOLOGICAL SAFETY REGULATIONS lo The Maximum Permissible Exposure (MPE) for personnel involved in this operation is 369 roentgens, gamma only, unless reduced because of previous or anticipated future exposure. All exposure to external gamma radiation will be regarded as total body irradiation. Special MPE of 20 roentgens, gamma only, is authorized for crew members of air sampling aircrafte The maximum permissible exposures as stated above are applicable to a field experimental test of nuclear devices in peacetime, wherein numbers of personnel engaged in these tests have been previously exposed or will be continuously exposed to potential radiation hazards. It may become necessary from a study of personnel records to reduce the MPE for certain individuals who have participated recently in other atomic testse Under a military tacti- cal situation or emergency the maximum permissible exposures above do not applye 20 All atoll land and lagoon areas in or near which a detonation takes place will be considered contaminated until cleared for operations by the task force commander. Entry to and exit from contaminated areas will be via RadSafe check points only. Contaminated land areas of intensities greater than 100 mr/hr will be delineated as such; Personnel entering these areas must be accompanied by a monitor and will be subject to clearances by the RadSafe Officer, TG 7ole RadSafe clothing and equipment will be issued to the person- nel. he roy Be Contaminated land areas of instensities less than 100 mr/hr and greater than 10 mr/hr will be controlled areas; Personnel entering these areas will be subject to clearance by the RadSafe Officer of TG Jel. Monitors will not be required for entry into these controlled areaso 5e Contaminated land areas of intensities less than 10 mr/hr will be considered unrestricted from a RadSafe viewpoint. Areas coming within this limitation will be designated specifically by CJTF SEVEN prior to unrestricted entry. RadSafe monitors assigned to individuals or groups working in con- taminated areas or with contaminated equipment during recovery operations will act in an advisory capacity to keep the recovery party leader informed of radiation intensities at all times. The recovery party leader is expected to accept this advice and act accordingly. It is the responsibility of both the leader and the members of the recovery party to adhere to the limits established in these regulationse Te Film badges, dosimeters and protective clothing (coveralls, booties, caps, gloves, dust respirators, etc.) as deemed necessary will be issued te personnel entering contaminated areas by appropriate task I-I-1 ee bo