Critical dimensions of systems containing /sup 235/U, /sup 239/Pu, and /sup 233/U: 1986 Revision Page: 75 of 205
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PLI'TONIUN SOLI'TION5, U1NLIlITED z-"'I'll
Thec critical illtirlite slabls replortel bvrum lliull'w ill 16-. 9-1 apply to so1116ions of Pu c":n-
i airing 23.2I and 2- 0 " p d, as well is .1.7i "IPu. Because III high ""[i dat a exist
for spheres, reflect t 'd slab thickiesses were covered to e uivallit sphere radii by means
of t he ext ral t ion dist ances. b for slabs and b, for spheres, that are list ed in Table 17.
Critical radii of spheres, r,. were obt aiied fromi ,~ calcuiat ions that reproduced corre-
sponding crit ical slah thicknesses, I i. Th listed values of b, t he sat isfy the relating
r r b, t" - 2(1.M; b, ),
whlrl hr 1.06 b, Ar consistency with Fig, I. \alies of Q Micasi"!d in finite slabs
but attnrilited to infinite slab. art siii vii parenthetically in 'Table 17 to suggest that the
calculat ed vahi-s aire reasonable.
II addit ion t ot he Hlanford dat a, Table 17 includes crit ical dat a from taclay'" for a solut ion
of plut onium cont ailing I9 2"Pu. The syst em select ed represents t he high H /Pu ext remne
of a range of mueasuremiet s. Not included is a Hanford critical experiment with solution
of plutouium cont airing 43- 2""Pu with partial water reflector."
C(mtputed values that are tied to the points of Table 17, give the curves of critical mass vs
perce-i ""Pu that appear in Fig. 35. These curves apply to water-reflected metal-water
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Paxton, H.C. & Pruvost, N.L. Critical dimensions of systems containing /sup 235/U, /sup 239/Pu, and /sup 233/U: 1986 Revision, report, July 1, 1987; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1109879/m1/75/: accessed March 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.