DOUBLE P-1 SPHERICAL HARMONICS APPROXIMATION IN SLAB GEOMETRY
Reactor physics calculations on heterogeneous reactors where fuel elements are of the plate type often make necessary a study of the local thermal flux variation. The purpose of such a study is to obtain proper flux-weighted thermal constants for a homogeneous core or a cell of a core. In the past such studies have been done by the P/sub 3/ standard spherical harmonics approximation to the transport equation. A greatly improved technique is applied to slab geometry where the angular flux is expanded in halfrange Legendre polynomials rather than the full range polynomials. This method simplifies calculation techniques considerably in that much fewer terms are needed in the expansion to obtain adequate accuracy as compared to the standard spherical harmonics method. Modifications are made in the original P/sub 3/ program to use the halfrange method and other extensions are made to make the program more useful and general. (auth)
- Research Organization:
- Phillips Petroleum Co. Atomic Energy Div., Idaho Falls, Idaho
- DOE Contract Number:
- AT(10-1)-205
- NSA Number:
- NSA-14-011259
- OSTI ID:
- 4151966
- Report Number(s):
- IDO-16572
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
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