ENIWMTOK and for the reof critical weapon components and scientific instruments to A total of 9 s, turn of radioactive cloud samplos requiring varly Laboratory anilysi nts and scientific westbound flights were dispatched to deliver the weapon compone instruments. shot samples. A total of 22 castbound flights were utilized in the return of postSpecial security and salvage measures were taken on all flights carry- r ing weapon components. ‘Sample materials were given expeditioushandling by transfc to waiting aircraft at HICKAM Air Force Base and by direct flight from HICKAM Air Force Base to KIRTLAND Air Force Basc, 22, RADIOLOGICAL SAFSTY Responsibility for ensuring radiological safety followed command lines. Each element of the task force, operating in the vicinity of radiation, had its own trained personnel. Radiation dosages of personnel, in general, were maintained well ‘selow pre-established levels, The permissible radiological exposure was established at O,7 roentgen per calendar week. This tolorance, slightly morc Liberal than the current 0.3 roentgen per week limit used for continuously exposed radiation Llabora— tory personnel, was adopted. Under unusual circumstances, an additional accumulated exposure up to three roentgen in specific cases, where required for a Limited number of individuals, could be authoriazed by the Commander. RADTAC (Radiation Detection, Indication and Computation) equipment performed adequately when used for the purpese for which it was designed. standard airborne RADIAC. cquipment is non- Specialized existent, however, a need exists for continued development work in this field, Fall out predictions, with particular reference to health hagards of significance to the task force as well as to personnel in areas outside the immediate ENTWETOK Danger Area, were made the focus of particularly carcful study. Upper wind analysis and trends of upper air resultant wind patterns, together with fali~out data on particulete matter, were of especial imporbance in operational decisions, Additions and improvements in. fall-out predictability were evalved on successive shots from Lessons learned on preceding shots, Slight fall-out, of no significance as a health havard, occurred on inhabited arcas of the ENTWETOK ATOLL after "DOG" and "ITEM" shots. The prompt fall-out which occurred after "DOG" shot was unexpected, ainco large particle fall-out had not been observed on Operation SANDSTONE. Obher shots had their maximui fall-out over uninhabited islands of the atoll and over the open ocean. Experience on Operation GREENHOUSE has shown clearly that present highly sensitive instruments tend to greatly alarm even well trained laboratory technicians and Service trained honitors who work with Laboratory dosage standards and instruments. 13— . et rae —e psec poh ' “we Kenn’ oa bw A nee Roa syeynteye GL Te s, Uuenot bGr -- Tess Vue f It is beiléved