Analysis of Np-237 ENDF for the theortical interpretation of critical assembly experiments.

Conference · Thu Jan 01 00:00:00 EST 2004

OSTI ID:977930

Mihaila, B ^[1]; Chadwick, M B ^[2]; MacFarlane, R E ^[3]; Kawano, T ^[4]

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1. Bogdan
2. Mark B.
3. Robert E.
4. Toshihiko

We report on the present status of our effort toward an improved Np-237 evaluated nuclear data file (ENDF). The aim here is to bridge the gap between calculated and observed k-eff values, as measured at the Np-U critical assembly at LANL, TA-18. As such, we perform a critical analysis of the existing body of experimental data and recommended evaluations. We are targeting in principal the fission nu-bar and cross section in Np-237, as well as the inelastic scattering which is particularly important since Np-237 is a threshold fissioner. This analysis will be employed in a future sensitivity study of the calculated k-eff with respect to variations of the afore mentioned nuclear data.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• OSTI ID: 977930
• Report Number(s): LA-UR-04-7959; TRN: US1003645
• Resource Relation: Conference: Submitted to: DNP Fall '04 Meeting, October 2004, Chicago, IL
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NEPTUNIUM 237
CROSS SECTIONS
FISSION
INELASTIC SCATTERING
NUCLEAR DATA COLLECTIONS
ZERO POWER REACTORS