PART TwOr RADIOLOGICAL SFETY PROBLEMS 1. Originally, Operation CASTLE involved four events in the very high yield range. as plans progressed, the schedule was increased to seven events, and thon reduced during the operation to six, «sg a consequence, the iadsafe Plan for the operation required detailed re-evaluation to determine the practicality of various assumptions and planning factors. Primarily, since each extra event (insofar as personnel ratiation dcsages were concerned) was additive, the permissible exposure per event for shot participants decrcased as the number of events increased, Prior to Operntion CASTLE, the maxioum number of events at the Pacifie Proving Ground (PPG) was four on Operation GREENHOUSE. The maxisum number of high ylel< events was two on Opcratica IVY, of wiich one was an air burst at 1,500 feet. It appeared that C..STLE planning would have to be budlt around the samc personnel <osage allowance as usod on these cperations regarilcss of tho number and yields of the events for C..STLE. There was an obvious need for ways and ocans to cut dcwn on personnel exposures per sh_t or to raise the permissible <cse for sone individucis, & In regard to efforts to cut down on personnel exposures, 4 number of factors were involved. Not all personnel would participste in each event; however, it appeared to be a logicel assumption that the average number of events for participation would increase. It was also assumec¢ thet the total mmber of people involved in the operation would increase jue tc attecpt to spread the permissible dosage over 3 sufficicnt number of participants ta affect an over-all average dcse within acceptable limits, It was also ciear thet some form of indoctrination was necessary in order to effect completicn of work in contaminated areas with the maximum efficiency in order ths: the 17