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Title: Technical basis for the use of a correlated neutron source in the uranium neutron coincidence collar

Active neutron coincidence systems are commonly used by international inspectorates to verify a material balance across the various stages of the nuclear fuel cycle. The Uranium Neutron Coincidence Collar (UNCL) is one such instrument; it is used to measure the linear density of 235U (g 235U/cm of active length in assembly) in fresh light water reactor fuel in nuclear fuel fabrication facilities. The UNCL and other active neutron interrogation detectors have historically relied on americium lithium ( 241AmLi) sources to induce fission within the sample in question. Californium-252 is under consideration as a possible alternative to the traditional 241AmLi source. Finally, this work relied upon a combination of experiments and Monte Carlo simulations to demonstrate the technical basis for the replacement of 241AmLi sources with 252Cf sources by evaluating the statistical uncertainty in the measurements incurred by each source and assessing the penetrability of neutrons from each source for the UNCL.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Report Number(s):
LA-UR-16-26893
Journal ID: ISSN 0029-5450; TRN: US1700977
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Nuclear Technology
Additional Journal Information:
Journal Volume: 197; Journal Issue: 2; Journal ID: ISSN 0029-5450
Publisher:
American Nuclear Society (ANS)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; safeguards; neutron interrogation source; active interrogation
OSTI Identifier:
1342866

Root, Margaret A., Menlove, Howard Olsen, Lanza, Richard C., Rael, Carlos D., Miller, Karen Ann, and Marlow, Johnna Boulds. Technical basis for the use of a correlated neutron source in the uranium neutron coincidence collar. United States: N. p., Web. doi:10.13182/NT16-50.
Root, Margaret A., Menlove, Howard Olsen, Lanza, Richard C., Rael, Carlos D., Miller, Karen Ann, & Marlow, Johnna Boulds. Technical basis for the use of a correlated neutron source in the uranium neutron coincidence collar. United States. doi:10.13182/NT16-50.
Root, Margaret A., Menlove, Howard Olsen, Lanza, Richard C., Rael, Carlos D., Miller, Karen Ann, and Marlow, Johnna Boulds. 2017. "Technical basis for the use of a correlated neutron source in the uranium neutron coincidence collar". United States. doi:10.13182/NT16-50. https://www.osti.gov/servlets/purl/1342866.
@article{osti_1342866,
title = {Technical basis for the use of a correlated neutron source in the uranium neutron coincidence collar},
author = {Root, Margaret A. and Menlove, Howard Olsen and Lanza, Richard C. and Rael, Carlos D. and Miller, Karen Ann and Marlow, Johnna Boulds},
abstractNote = {Active neutron coincidence systems are commonly used by international inspectorates to verify a material balance across the various stages of the nuclear fuel cycle. The Uranium Neutron Coincidence Collar (UNCL) is one such instrument; it is used to measure the linear density of 235U (g 235U/cm of active length in assembly) in fresh light water reactor fuel in nuclear fuel fabrication facilities. The UNCL and other active neutron interrogation detectors have historically relied on americium lithium (241AmLi) sources to induce fission within the sample in question. Californium-252 is under consideration as a possible alternative to the traditional 241AmLi source. Finally, this work relied upon a combination of experiments and Monte Carlo simulations to demonstrate the technical basis for the replacement of 241AmLi sources with 252Cf sources by evaluating the statistical uncertainty in the measurements incurred by each source and assessing the penetrability of neutrons from each source for the UNCL.},
doi = {10.13182/NT16-50},
journal = {Nuclear Technology},
number = 2,
volume = 197,
place = {United States},
year = {2017},
month = {1}
}