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Six-group representation of the energy spectra of delayed neutrons from fission

Journal Article · · Nucl. Sci. Eng.; (United States)
OSTI ID:5189286
Group parameters (abundances and half-lives) and group spectra have been derived from the nuclear data and fission yields of the individual precursors for six delayed-neutron groups and for the fissionable nuclides /sup 232/Th, /sup 233/U, /sup 235/U, /sup 236/U, /sup 238/U, /sup 237/Np, /sup 239/Pu, /sup 240/Pu, /sup 241/Pu, /sup 242/Pu, and /sup 252/Cf. The results can be combined into a calculation of the resulting delayed-neutron energy spectrum at any cooling time and for any mixture of the abovementioned nuclides. The validity of the method is checked in various ways such as comparing total neutron yields and group yields with the corresponding experimental quantities and comparing neutron spectra for half-life groups 2, 3, and 4 with integral experimental measurements. The outcome of these tests puts confidence in using the spectra obtained for applications within nuclear technology.
Research Organization:
The Studsvik Science Research Laboratory, Nykoping
OSTI ID:
5189286
Journal Information:
Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 80:2; ISSN NSENA
Country of Publication:
United States
Language:
English

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