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Wnaa film and ohemlcaldoslmeters,placed In blast shields, mm taeedto meaaure the gamma radiationat various land and lt Recovem Total Becovev Value X in BEST AVAILABLE COPY
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For the Yumchi-A.OmOexlComplex the average lxgmnentwas 1.1. The variationin tha Yuroehi-Aomen exponentw be due to the fractionationof the contamination. 7he results Or the waterstationsrule out the possibilityof cloud or lnltial RISULTS ~ WATER STATIONS Ration Ttme Dose
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A dmage andradiation mxrvuy was condwted at H+ b hom on [m day. Thissumey cowred tieislandsof the atoU sndwasconclusiveenough to limit reentxyto ~ andAimkliJion the fimt day. Thissurveyindicated atollaid lagoonboth to the was encomtiredat Bikinias Readingsof 1 r/hr wra obtainedat 100feetaltitudoin tievicinityof zaro
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mte at Recovory ~c~” bt ~U 1s tho rate existinglt tho time the detectirswere l re8ultof the htonation of at nus
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To obtain gamma rates w time for various distances Ectorsaot one foot above ground. The doteator outputs var.
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Wrtlci-tion in mwasarrangedon the basis of L>@Vsi~l Instillationfor _ s plmed and cffocted on ?SSlazulswe8t of Aomoene When tho shot locationwas a~gedt BcIwUm uas reduood to the amountbdlaatod, The projoet ~tlm Is to profldedata on neutron fluxes from boosted or _Mlw d~ces for oomparlsonwith neutron fluxes from
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y with lncOXPleteltoll restits. Results of this initial rveywere eonclulve enough to c~cel all activitiesfor 1+1~ First complete smey vas cofiutod on B +2 days. iresdt of wind conditionsduring B and B + 1 day areas had kitlngthe ~+k hour readtigs can only b considomd ap--1.2 ~timate. These extrapolatedvalues are based on a t ~~g this period, thus tidlcattigvalues %n excess of .+bgom areas contimg susp9i2ded8@dhnt. For the ftist . hys this area vas cotiined to the vestim q-tier of the ~:~rnof tha lagoon In l period of three dwscr.
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A partial Rad-=fe suwey was conductedon Laywith Incompleteatoll resultsa Restits of this smey mforesem fallout of mliactive material less than 5 Acrons In size did occur on the night of R+l. This tall- ~utcovered the atoll and raised radlatim levels by apaut this radiationlevel WOUM Mve oorrespofiedto 3.$ rfi m7* the lagoon with levels oompa~ble to that of‘e Wgoon
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i TWO hundred ft altlttie. t Radiationshine from water in soutimst passage..
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A partialRad-Safe survey was conductedo day with incompleteatoll results, Results of this survey did Indicatethat Bokobyaadaa,lUamu,Enirikku,Bltii, and the Yurochl - Aomoen chain were materiallycontaml.nated. Reentry and recovery were accompllshgdto a large degree on sultedfrom this shot. Lagoon contaminationwas restrictedto a V shape pattern - Itithapex at Enlnman and tips covering the Bokobyaadaa- Aomoent* i Wa. A reading of 100 mr/hr was obtainedover the Enlnman b lion while Bikini anchorage shoved traces of con-m&ation+3.: crater was materiallydifferentfrom that of ‘lnthat radiationlevels within crater were ‘s~~en from the lip of crater, and surrounding
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TO measwe the gamma radiationexposme at various ~!’svereplacedat a hetght of 3 feet awe ground for the 8tetlonsl The beach stationswere set so that the detectors 1 foot abovemaximum high tide level. Both detect~g systems Resultsare as shown In Table 201-1- ~ resultsfOr stations 37, 38, and 39 give a metingm * expressionexponent. The resldwl from tie prOtiOus L-*~ ~=s residualdue to slight assumed miriationsin signific=t part of the give an average decay exexponent of .8s. This AS BEST AVAILABLE COPY -
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IOL ~ ground dmtig passage of the shock vave. This resulted ted using a straightAOT Decreastigthe m-contributlonwould increasethe X value at this station. The beach stations,19 and 20, had a higher decay ox-” Station16 3s a bluff stationwhich sees the beach on del Thus, it lies some-t betwem the land and beach Attention is called to the repofi in which station16 was andysed with the land ~ andproducedthe highest deoay exponentsof any 0? me
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A damage and radiation sumey was conducted onl I iay. This survey covered the eastern and northern Islands of the atoll and was conclusiveenough to limit reentryto RA~, Mklni and Airukii$lon the first day. The survey on D+l day indicatedthat recontaminationwas limited to the Yurochi - Aomoen chain and the Bikini - EnP sequence Of islands. RO at Bikini Atoll aS Lagoon water was materiallymntaminsted with radioactive lediment. Readings of ~.2 r/hr were obtainedat an altitude of JO feet over zero point. This contaminationmoved to the west “andsouthwestso that small boat operations could be conducted hgoon flushing through the southwest passage ~~materiallyincreasedradiationlevels in the vicinity of Ourukaent ,
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TO smasum the g- radiationexposurelt vtious looatlmsfolloulng data was ado asm.adng s UXI ?9, showevickiw of radiation in mldltdonto the residual radiation .. from 78 being basedon the .
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uluaivoenoughto U.mit men- to the southern axd lestim ieh!xh of the uas ~rl.en-d ti Parg on theomning of
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