3.14.2 Orientation and Training of Task Unit 7 Personnel An indoctrination course was conducted by key personnel of the Task Group and TU 7 in the Forward Area from 17 to 22 October 1952 in order to present a comprehensivepicture of OMI Pow oo the operation to members of this unit. The material discussed during these seminars included the following subjects: Concept of Operation Ivy. Radiological-safety operations and responsibilities. Radiological instrumentation. Photodosimetry, dosimetry, and records. Weather relations. Scientific programs. Weapons effects. . Mike and King descriptive material. Since TU 7 was responsible for the radiological safety of the Task Force during Operation Ivy and since there existed the possibility that the regularly assigned monitors might receive their prescribed dosage limit before the completion of the operation, the availability of the services of a pool of reserve monitors was evidently necessary. The personne! for this pool were made available from JTF 132 and its various Task Groups. Those reserve monitors who did not possess credit for the Armed Forces six-weeks course on radiological safety attended a series of conferences and practical exercises conducted from 7 to 11 October 1952. The course consisted of the following subject matter: introduction to atomic weapons, instrumentation, calibration procedures, monitoring procedures, protective clothing and practical decontamination, and monitoring responsibilities and special instructions applicable to Oper= | ation Ivy. 3.14.3 Organization and Activities of Task Unit 7 TU 7 was organized into the following groups: 1. Control Group (including special missions such as Ujelang evacuation, Kwajalein liai- son and control, and Horizon radiological safety). 2. Laboratory Group (Radiochemical Laboratory, Electronics, Photodosimetry, and Dosimetry Sections). 3. Decontamination Group. 4. Information Center. 5. Administration and Supply Group. 6. Special Projects Group. The activities of these groups and their various sections are discussed below. 3.14.3.1 Control Group Upon organization of this group and designation of the various duties of its personnel, im- mediate contact was made with the interested agencies of the various projects to determine the necessary radiological-safety support required for the various recovery activities. Complete plans were drawn up for the post-Mike re-entry and the post-Mike and post-King recovery programs. Several drills were held to test the adequacy of communications, time elements, transportation facilities, etc. The group operated from the USS Rendovain the post-Mike period until re-entry was accomplished. After re-entry and during the post-King operational phase, they operated from the Radiological Safety Center on Parry Island. Before any survey, recovery, or work-party trip was initiated, checks were constantly maintained to assure ade- quate radiological safety. Personnel operating in contaminated areas were advised of their accumulated gamma dosage and were further advised as to operating times which would permit them to accomplish their mission and still not exceed the permissible dosage limit. Other protective measures included the issuance of protective clothing, various dosimeters, etc. Communication facilities consisted of SCR 508 radio nets, SCR 300 radio nets, AM/TRC radio nets, 40