MIT LMFBR blanket physics project progress report No. 7, July 1, 1975--September 30, 1976 Page: 74 of 187
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-59-
temperature and c7q interpolation of the self-shielding factor,
f (T,an). One expression used as a fitting function (K*0
for the self-shielding factor, as a function of Cq, at a fixed
temperature T, is:
fcg^a0^ = A tanhBOlnao + C) + D (5.22)
where A, B, C, and D are constantSf determined by four values
of f at given Oq values. As for temperature interpolation
at a fixed a Lagrange-three-point interpolation scheme
predicts, very accurately, the shielding factors for any
current temperature, T.
Figures 5.1 and 5-2 (from Ref. (K4)) show the self- .
shielding factor for group 14 (86.5-111 Kev) of U-2.38 as a
i
function of aQ and T, respectively. As seen, the results
predicted by the aforementioned interpolation schemes (shown
by the splid line) are in excellent agreement with the actual
self-shielding represented by the dark circles. This con-
cludes the discussion of homogeneous self-shielding., hopefully
adequate to lay the groundwork for. the ...introduction of
heterogeneous self-shielding factors. For more complete
expositions on the subject of homogeneous self-shielding the
following references are recommended: B2, Gl., Kl, K4, K6,
S6, S7.
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Driscoll, M.J. (ed.). MIT LMFBR blanket physics project progress report No. 7, July 1, 1975--September 30, 1976, report, September 30, 1976; Cambridge, Massachusetts. (https://digital.library.unt.edu/ark:/67531/metadc1065330/m1/74/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.