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Machine-read from the scan, so expect some errors. Lines that couldn’t be read are left out.
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PIMHIEG FOR CASTU 1. BmEIS PROPOSED FOR TEST operation Castle, the next ovemeas test, vas discumed in general terms at a DIRX meeting on 1 Ibcember, lt which Bradbury stated that: (a) the qwation, O~i@~y planned for this fall, till be delayed ion of designn by April-1~3, co@etion of construction by the end of 1953, and delivery at the test site by 1 Bkch 1*. Sin~ “ this constitutes a rather large program for the Uboratory, the feeling is that there can be fev changes from this general outlines that is, it till take all the t~ available to get these bmbs designed and fabricated, so it seems unlikely that more gadgets vill be added for test. In addition, *rkeley will test the folloving two models:
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TM?ee we need consider only from the point of view that they will be in the m qperationg and their geographical location} we vill not
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Wehniques and equipmnt locatlcn3a for * propoeedmaauremnta m discuaeed In mre detill balw. have ~el.da in the mgaton region, * vorry pr~tly arises of in one Presumab~, OBJ can tab the necessary pmcautims to protect personnel, but there is also the possibility of having to stop tlM operation before cqphti~ becauae the Islanda are so confamlnated that no one can work on them. During Ivy there ns not ~ really seriouo fell+ut hazard: the radioactivity did not get dmtn b Parry @ all, but only to around ‘Run$t; it was possible to work on Runit the day after the shot, and a week la*r on ~. Ewever, Ogle feels we vere extremely fortunate and Xght not be so again. . In addition, there are the con8ideratlons of consemtion 0? real estati, suitable locations for instmntatlon, Waapon assembly and
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Zhere is a sea wnmt near the Atoll. As for shooting hsl~ the lagoon, Waves Wl not think 2 =gatons vould do mything to the coral in the lagoon. The danger area wouud ~vetok Atoll within vhich shlpo Oanaot go is 100 adles out one way, ~ tiles out the other- This would be an advantage te staying close to the reef. It would elSO be @ta etc. ), tkn float It across t&e lagoon end anchor it on * far reef. Ogle queetione(lthat there VOUM be any appreciable difference “ in tlM fall-out frm e gadget tired on l raft ih tb water enil one fired as e s~ece shot on hnd, except that e fev of the induced activities tight be dlffereat. Es thought it a good idea to use rafts but doubted that the width of the lngoon vas enough to guarantee no fall-out haaard and thought they Mght have to be out in tb ooean m ~ to 100 tiles. ?eitILZM(Xeves did not th.@ that falkout would be serious from a shot la the lagooa, feeling that the situation uwld be Rore like en air drop. Felt pointed out there are two things to contend vlth: first, there is a pattern around the boab vhlch 18 eseentiaUy roun&4hls is to call, it. The real fall-out is ra~r unpredictable, but it folkvs the trade vlndu; Felt thought that titer one is M *6 away, it does not matter vhether he is 15, 20, or W miles lvayo Again, hb felt there vould be much less particulate matter thrown up in the alr frm l shot aver vater. Spence pointed out that lctually one is putting qul~ e lot of debris l.n the air, since three per cent of sea water is c~osed of solids. Ewever, he did not ~ in vhat structure this vould cosm down, or vhether it vould remain suspenbd In the air. t Ogle vas still vorried about fall-out, not ls l dmger to people but tram the point of viev of having to stq in the middle of ea operation lvetok Inland miles way), en advantage over basing them on Kvajaleti. Biktni t6 elmst due eaat from Ibivetok. & the spring the vlnds are all vesterly ex=pt at the surface, uhere them 16 a shear. Instmxmmting e raft shot should not be too difficult for field .- meas~nta only. In tiev of $@ present situation on Mike f3hot, and since these are also thermonuclear models, it So felt one vents to get ., both radiochemical end fireball yield. The fomer oan be done vith almost euy firing site. IPelt thought that fireball photography would be “~~ , ship using a g$mxtibilized platfo~ or from an i-d if the raft is ~
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t 8pence suggested an additional advantage to the barge: this vill probably not be t?M last megaton operation nor the last In vhich lir drops are not feasible, and ue will always need land. &other method for firing Everyme llked * idea of using rafts, both to save land and because of the flexibility the~ afford, particularly if tby can be qloyed in one could lver be c~~ly happy about future avoid such vind pattirns as led to tall-out; Space did notthink fall-t, but personally did mot ~ra~es thught one could in the - bad falld on Greenhouse After fwther discussiau, it vas agreed to plan tentatively qon the point of tiev of the weqmns. lITi@onuill look further into tb raft situation and get mre information on dimmsioxw, Cmstruction, and other details. lhere would, incidentally, be no problem in ~ n b After considerable discussion, the folMwing schedule reasonable as a basis for planning: pot sample amivals at XML.
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It appears that a photo tover on Parry could cover, from the point of ~iev of yield, all the lbove stits at Eniuatok. . So far, we are but It seems apprqmiate that some study be given to use of the photographic technique for other measurements which T Division ai@t ask for. &3nt6 are not absolutely necessmy, %nterest in them has not been C~kti4Sl~ discla~d, so It behooves us to investiga~ vays to get alpha by comparatively simple, rwmte mans. J-13 is looktng into the Teller alpha technlqw, possibilities of telemetering the signal, etc., and will continue
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regard to this datamlaatiok Felt stated that s Bowen cmm, looking direcw Vith no mirrors or pipes, could get it this weU. - mls technlqus depends upon tb possible location of 8 Zbe feasibility of thiS techulque hBs not yet been proved. Watt vas requested to give m thought * the abova msthods -- @ present his recomendatims.