Action Sheet 55 Measurement Campaign Summary

Technical Report · Wed Oct 09 00:00:00 EDT 2019

DOI:https://doi.org/10.2172/1570594· OSTI ID:1570594

Favalli, Andrea  ^[1]; De Baere, P. ^[2]; Swinhoe, Martyn Thomas  ^[1]; Root, Margaret A.  ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2. European Commission, Brussels (Belgium)

Neutron collars have long been used by international inspectorates to determine the ²³⁵U loading of fresh light water reactor (LWR) fuel in nuclear fuel fabrication facilities. Burnable poisons are strong thermal neutron absorbers that are frequently used to increase the lifetime of LWR fuel in a reactor. These poisons have made the traditionally thermal neutron collar measurements challenging because they force inspectors to rely on operator declarations of the burnable poison content of the fuel in order to correct for the decreased count rate caused by the added thermal neutron absorption of the poison. Work has been conducted internationally to try to eradicate the reliance on operator declarations. The Euratom Fast Collar for BWR Fuel (EFCB) is one promising technique to manage this issue.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
• DOE Contract Number: 89233218CNA000001
• OSTI ID: 1570594
• Report Number(s): LA-UR-19-30238
• Country of Publication: United States
• Language: English

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