Feros Commanding Officer To: Vie: ; Chief of Naval Operations 7 (1) Commander Task Group 7,3 (2) Commander Joint Task Forse SEVER Subj: U.S.Sp BATROKO (CVE-115)) radiologiosh contemination of 1. cdout 0600-K on 1 Maret 1954 this ship received a heavy out of contaminated coral partislee following the detonation of an atasle device miles 133°T from the shot site. The BLIROEO was in the process of launching five (5) helicopters at the time the fall-out wae reecived and the washdows equipment was layod cut in the catwalks2 One helicopter ws in the air but was imediately recalled and lanied, The first warning of fall-out was the report of approximately one (1) roentgen per hour ax the flight deck, The order to set Material Condition .JLE was given at the first indication of fall-out and all ventilation, including ventilation -to the room spaces was shut dow: and ; 4 two (2) hours. This prevented contamination of real consequence of any spaces bclow the hangar deck, the engineering spaces rising to anly eight (8) milli roentgens per hour, gamma only. The waek-dow equipnent we coral sand deposited on the flight deck, catwalks, island structure, fore= castle and fantail. ration of the wish-dow: equipment was continued for approximately two (2) hours and then secured. Monitoring of the flight deck at this tine gave readings as high as five (5) per hour in many of the crouse deck gutters per hour was recorded in the flight deck drain on the starboard cide aft. Fire hoses were then broken cut and us tie remainder of the day. The fire hoses proved to be mich supericr washing away the conparativaly large particles of coral sand : § 5 f i a ; , received and it was possible to reduce tho flight deck count to approxi- mately twoehundred (200) milli roent 2. & second fall-out was received starting at about 1600-4. cut was composed of wory fine particles and increased the scunt on the flight deck and bridge to between two-hundred (200) and four-hundred (400) milli roentgens per hour, gamma only, The fire hoses were again used on the flight deck, forecastle and fantailand bridge structure until about 1éL54{ when the Task Unit 7.1 radiological personnel recommended sending INCLOSURE 2 K-55-IV(be}) ~~