Flux-adjoint weighted few-group cross sections used for reactor transient analysis

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Nuclear Science and Engineering; (USA)

OSTI ID:7050076

Kim, M H ^[1]; Henry, A F ^[2]

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1. Kyunghee Univ., Dept. of Nuclear Engineering, Yongin-Kun, Kyungki-Do 449-900 (KR)
2. Massachusetts Inst. of Tech., Cambridge, MA (USA). Dept. of Nuclear Engineering

Equations for a few-group model applicable to transient analysis are derived from a variational principle made stationary by the continuous-energy P{sub 1} equations. Flux-adjoint (bilinearly) weighted few-group parameters result. These can be reduced to the regular flux-spectrum weighted parameters by taking the adjoint spectrum to be constant in energy. Numerical comparisons with multigroup results show that both regular and bilinearly weighted two-group models provide acceptably accurate predictions of transient behavior when realistic pressurized water reactor cases are examined. Although there are still some theoretical questions to be examined there appears at present to be no reason to employ bilinearly weighted parameters for either static or transient analysis.

• OSTI ID: 7050076
• Journal Information: Nuclear Science and Engineering; (USA), Journal Name: Nuclear Science and Engineering; (USA) Vol. 103:3; ISSN 0029-5639; ISSN NSENA
• Country of Publication: United States
• Language: English

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