Temperature dependence of the multiplication factor in LWR lattices. Final report
Description
The temperature dependence of the neutron multiplication in typical BWR and PWR unit cells is determined as a function of fuel depletion when the fuel temperature is changed from 8000K to 12000K. The cross section changes with temperature of the principal isotopes of Uranium and Plutonium, and of some fission products, are taken into account simultaneously in the lattice analysis by means of very detailed resonance profile tabulations in the resolved resonance region of each nuclide. In addition the small temperature dependence of non 1/v absorption cross sections is included in the thermal multigroup library, as well as the UO2 group to group scattering kernel as a function of temperature in the thermal energy region. The report includes details relating to the temperature dependent cross section libraries, broad cross sections and fluxes, together with the calculational methods which make use of discrete ordinate integral transport calculations at epithermal energies and multigroup methods in the other energy ranges
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS., PC A04/MF A01.
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Additional details
Publishing Information
- Imprint Pagination
- 69 p.
- Report number
- EPRI-NP--1694
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 12608302
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Descriptors DEI
- BURNUP; BWR TYPE REACTORS; CROSS SECTIONS; MULTIPLICATION FACTORS; PWR TYPE REACTORS; REACTOR CORES; REACTOR LATTICES; TEMPERATURE DEPENDENCE
- Descriptors DEC
- REACTOR COMPONENTS; REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS