Fast Neutron Passive Collar Optimization Report
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
The UNCL has been used for over thirty years for the verification of the 235U content of LWR nuclear fuel.The most recent version of the detector, the UNCL-II, consists of four HDPE blocks, three containing 3He proportional counters and a fourth containing a slot for an AmLi source. [1] The 3He proportional counters have a nominal active length of 33 cm, a diameter of 2.54 cm and a gas pressure of 4 atm. The UNCL-II has cavity dimensions 41.4 x 23.4 x 23.4 cm.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1440503
- Report Number(s):
- LA-UR-18-24767; TRN: US1901618
- Country of Publication:
- United States
- Language:
- English
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