Calculation of the Doppler Coefficient Plutonium-Oxide-Fueled Fast Reactors Page: 3
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The average resonance parameters for Pu-239 are determined
by a detailed statistical analysis of the experimental material, whereas
the resonance parameters for Pu-240 are found rather crudely by analogy
with other isotopes because of lack of experimental data.
Systematic calculations of the effective cross sections and their
temperature derivatives were carried out using an improvement of Method B
as described in APDA-139 for the three isotopes U -238, Pu-239, and
Pu-240. The results are presented in graphs. The resonance parameters
for U -238 are taken from APDA -139. The Doppler coefficient is calculated
for a large plutonium-oxide-fueled reactor.
The appendixes cover a special topic, namely an accurate calculation
of the quantity e(s) of Nicholson's Method A, and describe the "maximum
likelihood method" as far as it is used in this report.
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Fischer, E. A. Calculation of the Doppler Coefficient Plutonium-Oxide-Fueled Fast Reactors, report, November 1, 1963; Detroit, Michigan. (digital.library.unt.edu/ark:/67531/metadc38367/m1/2/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.