Cr» Halter De Claus Le Joe Deal BEST COPY AVAILABLE TIPORMATION POR TABRITL Qver the weekend I made some elementary calculations as to the effects of an underground weapon on our Zuropean friens, Since time is short, I have not had time to recheck any af these calcu etionas, but I'm passing thes on to you fer whatever they may be worth, We know the following: (1} Jangle *Sugar* produced a “hot-spot" of roughly SO square miles, with radiation levels ranging from 7 r to ls r. (2) This was a low yield waapom, (3) ‘Trinity produced a sinilar hot-spot", (4) Cosages in the Trinity "hot-spot" were sufficient to produce burns on cattle. (5) LA-S26 gives neasured dosaces of 4.5 r at 3.3 hours after siot, 17 wiles frow saro, and estiuated desages to the cows of 138 r For purposes of scaling, let's assume that the size of the *thot~spot" following the detonation of a 20 fT weapon at the surface will zo as the cube root of the KT, ‘Thus for a 20 XT weapon we have an arug of 2.7 x 50 = 135 square miles. Let's assume that the radia- tion level will increase directly with the ET, givine us dosages FIED CONFIRMED TO BE UNCLASSI ICATION DOE/OFFICE OF DECET SE DATE: M._L. KOLBAY, A.D.C Wty ranging from 140 r to 290 r, To carry the arcumsnt one step further, if ome looks at the popula tian density of some of the western “urepean countries, one can eagily see that a relatively suall susber of weapons could abject & relatively large mucker of paople to radiation desagas exceeding taoge recomended for "%, nanely 30 r/day, Asan examplo, if one takes Sreat Britain, whose population density is roughly 500 people per eqeare allt, and one assumas 5 bombs are exploded on the surface, sone 3.4 x persons would be subjected to rediation dosares considered significant from the standpoint of RF, BYAUTHORITY OF DOE/OC (Table of Surepean populations) EISTRIBUTION: oy IA 2k utieemieemae _ ny oo & L,3 evs ar af. tEWED addressee Dr. Supher weanorrice|eH. OO bo SURNAME|peac(fe Ee ae ra “lo -~- Sst | . DATE wr wnucet pid ROO DL CLE Bea Files a = Exh $/22s2 MEANT 8 MANAGEMENT. / an HE 7 pcb B 6A ~dalioved pie DATE >| CLASSIFICATION CANCELLED _ / ” . 16—68110-1 aro ee i | ro .~ |