The effective beta sensitivity to the incident neutron energy dependence of the absolute delayed neutron yields

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Nuclear Science and Engineering; (United States)

OSTI ID:6317619

D'Angelo, A ^[1]; Filip, A ^[2]

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1. ENEA, Casaccia (Italy)
2. Centre d'Etudes Nucleaires de Cadarache, Saint Paul lez Durance (France). Commissariat a l'Energie Atomique

The uncertainty of the [sup 235]U, [sup 239]Pu, and [sup 238]U absolute delayed neutron yields v[sub d] is one of the principal sources of uncertainty in predicting the fission reactor reactivity scale [beta][sub eff]. The current uncertainties in the dependence of v[sub d] on incident neutron energy is investigated for significance in the evaluation of [beta][sub eff]. The uncertainty effects on the GODIVA, JEZEBEL, Zero Power Reactor, SNEAK, and Masurca benchmark facility calculations are analyzed using ENDF/B and JEF basic data. Different assumptions about the energy dependence result in variations of up to 5% in the reactor spectrum averaged values of v[sub d], and these would result in variations of up to [approximately] 2% in the value of [beta][sub eff] for a typical liquid-metal fast breeder reactor.

• OSTI ID: 6317619
• Journal Information: Nuclear Science and Engineering; (United States), Journal Name: Nuclear Science and Engineering; (United States) Vol. 114:4; ISSN NSENAO; ISSN 0029-5639
• Country of Publication: United States
• Language: English

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