skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Moisture corrections in neutron coincidence counting of PuO/sub 2/

Abstract

Passive neutron coincidence counting is capable of 1% assay accuracy for pure, well-characterized PuO/sub 2/ samples that contain plutonium masses from a few tens of grams to several kilograms. Moisture in the sample can significantly bias the assay high by changing the (..cap alpha..,n) neutron production, the sample multiplication, and the detection efficiency. Monte Carlo calculations and an analytical model of coincidence counting have been used to quantify the individual and cumulative effects of moisture biases for two PuO/sub 2/ sample sizes and a range of moisture levels from 0 to 9 wt %. Results of the calculations suggest a simple correction procedure for moisture bias that is effective from 0 to 3 wt % H/sub 2/O. The procedure requires that the moisture level in the sample be known before the coincidence measurement.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (USA)
OSTI Identifier:
5751662
Report Number(s):
LA-UR-87-4012; CONF-871110-16
ON: DE88004318; TRN: 88-004756
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 3. international conference on facility operations safeguards interface, San Diego, CA, USA, 29 Nov 1987; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; PLUTONIUM DIOXIDE; QUANTITATIVE CHEMICAL ANALYSIS; CALCULATION METHODS; DATA COVARIANCES; MOISTURE; MONTE CARLO METHOD; NEUTRON DETECTION; ACTINIDE COMPOUNDS; CHALCOGENIDES; CHEMICAL ANALYSIS; DETECTION; OXIDES; OXYGEN COMPOUNDS; PLUTONIUM COMPOUNDS; PLUTONIUM OXIDES; RADIATION DETECTION; TRANSURANIUM COMPOUNDS; 055001* - Nuclear Fuels- Safeguards, Inspection, & Accountability- Technical Aspects; 400101 - Activation, Nuclear Reaction, Radiometric & Radiochemical Procedures

Citation Formats

Stewart, J E, and Menlove, H O. Moisture corrections in neutron coincidence counting of PuO/sub 2/. United States: N. p., 1987. Web.
Stewart, J E, & Menlove, H O. Moisture corrections in neutron coincidence counting of PuO/sub 2/. United States.
Stewart, J E, and Menlove, H O. Thu . "Moisture corrections in neutron coincidence counting of PuO/sub 2/". United States. https://www.osti.gov/servlets/purl/5751662.
@article{osti_5751662,
title = {Moisture corrections in neutron coincidence counting of PuO/sub 2/},
author = {Stewart, J E and Menlove, H O},
abstractNote = {Passive neutron coincidence counting is capable of 1% assay accuracy for pure, well-characterized PuO/sub 2/ samples that contain plutonium masses from a few tens of grams to several kilograms. Moisture in the sample can significantly bias the assay high by changing the (..cap alpha..,n) neutron production, the sample multiplication, and the detection efficiency. Monte Carlo calculations and an analytical model of coincidence counting have been used to quantify the individual and cumulative effects of moisture biases for two PuO/sub 2/ sample sizes and a range of moisture levels from 0 to 9 wt %. Results of the calculations suggest a simple correction procedure for moisture bias that is effective from 0 to 3 wt % H/sub 2/O. The procedure requires that the moisture level in the sample be known before the coincidence measurement.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: