Measurement of the Effective Delayed-Neutron Fraction for the WINCO Slab-Tank Assembly

Conference · Sun Jun 10 04:00:00 EDT 1990 · Transactions of the American Nuclear Society

OSTI ID:6169849

Spriggs, G. D. ^[1]; Hansen, G. E. ^[1]

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1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

A recent experiment was performed at the Los Alamos Critical Experiments Facility (LACEF) in which several subcritical measurement techniques were compared using the Westinghouse Idaho Nuclear Company (WINCO) slab tank experiment as a test bed. It was noted that a significant discrepancy occurred between the results obtained by the source-jerk technique and a standard noise-analysis technique (the Rossi-alpha technique). These results are shown along with a synopsis of the experimental setup. Using a Monte Carlo code (MCNP), it was further noted that the source-jerk results agreed very well with the MCNP calculations. Thus, it was concluded that the discrepancy was due to a breakdown in the Rossi-alpha model.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• OSTI ID: 6169849
• Report Number(s): CONF-900608--
• Conference Information: Journal Name: Transactions of the American Nuclear Society Journal Volume: 61
• Country of Publication: United States
• Language: English

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