Hybrid S{sub N} numerical method free from spatial truncation error for slab lattice calculations
In typical lattice cells where a highly absorbing, small fuel element is embedded in the moderator (a large weakly absorbing medium), high-order transport methods become unnecessary. In this paper we describe a hybrid discrete ordinates (S{sub N}) nodal method for slab lattice calculations. This hybrid S{sub N} method combines the convenience of a low-order S{sub N} method in the moderator with a high-order S{sub N} method in the fuel. The idea is based on the fact that in weakly absorbing media whose physical size is several neutron mean free paths in extent, even the S{sub 2} method (P{sub 1} approximation), leads to an accurate result. We use special fuel-moderator interface conditions and the spectral Green`s function (SGF) numerical nodal method completely free from spatial truncation error, to calculate the neutron flux distribution and the disadvantage factor.
- OSTI ID:
- 89137
- Report Number(s):
- CONF-941102-; ISSN 0003-018X; TRN: 95:004215-0209
- Journal Information:
- Transactions of the American Nuclear Society, Vol. 71; Conference: Winter meeting of the American Nuclear Society (ANS), Washington, DC (United States), 13-18 Nov 1994; Other Information: PBD: 1994
- Country of Publication:
- United States
- Language:
- English
Similar Records
A hybrid discontinuous finite element-spectral nodal method for slab-geometry transport problems without spatial truncation error
A numerical method for multigroup slab-geometry discrete ordinates problems with no spatial truncation error