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Title: A PRACTICAL GUIDE TO MEASUREMENT CONTROL EXPERIENCE ON NON-DESTRUCTIVE ASSAY EQUIPMENT AT THE LANL PLUTONIUM FACILITY

Abstract

No abstract prepared.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
785070
Report Number(s):
LA-UR-99-2963
TRN: US0111268
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Nov 1999
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; LANL; PLUTONIUM; NONDESTRUCTIVE ANALYSIS; QUALITY CONTROL; RECOMMENDATIONS

Citation Formats

M. SCHANFIEN, and L. BRUCKNER. A PRACTICAL GUIDE TO MEASUREMENT CONTROL EXPERIENCE ON NON-DESTRUCTIVE ASSAY EQUIPMENT AT THE LANL PLUTONIUM FACILITY. United States: N. p., 1999. Web.
M. SCHANFIEN, & L. BRUCKNER. A PRACTICAL GUIDE TO MEASUREMENT CONTROL EXPERIENCE ON NON-DESTRUCTIVE ASSAY EQUIPMENT AT THE LANL PLUTONIUM FACILITY. United States.
M. SCHANFIEN, and L. BRUCKNER. 1999. "A PRACTICAL GUIDE TO MEASUREMENT CONTROL EXPERIENCE ON NON-DESTRUCTIVE ASSAY EQUIPMENT AT THE LANL PLUTONIUM FACILITY". United States. doi:. https://www.osti.gov/servlets/purl/785070.
@article{osti_785070,
title = {A PRACTICAL GUIDE TO MEASUREMENT CONTROL EXPERIENCE ON NON-DESTRUCTIVE ASSAY EQUIPMENT AT THE LANL PLUTONIUM FACILITY},
author = {M. SCHANFIEN and L. BRUCKNER},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month =
}

Conference:
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  • Prior to disposal, nuclear waste must be accurately characterized to identify and quantify the radioactive content. The DOE Complex faces the daunting task of measuring nuclear material with both a wide range of masses and matrices. Similarly daunting can be the selection of a non-destructive assay (NDA) technique(s) to efficiently perform the quantitative assay over the entire waste population. In fulfilling its role of a DOE Defense Programs nuclear User Facility/Technology Development Center, the Los Alamos National Laboratory Plutonium Facility recently tested three commercially built and owned, mobile nondestructive assay (NDA) systems with special nuclear materials (SNM). Two independent commercialmore » companies financed the testing of their three mobile NDA systems at the site. Contained within a single trailer is Canberra Industries segmented gamma scanner/waste assay system (SGS/WAS) and neutron waste drum assay system (WDAS). The third system is a BNFL Instruments Inc. (formerly known as Pajarito Scientific Corporation) differential die-away imaging passive/active neutron (IPAN) counter. In an effort to increase the value of this comparison, additional NDA techniques at LANL were also used to measure these same drums. These are comprised of three tomographic gamma scanners (one mobile unit and two stationary) and one developmental differential die-away system. Although not certified standards, the authors hope that such a comparison will provide valuable data for those considering these different NDA techniques to measure their waste as well as the developers of the techniques.« less
  • A new neutron counter, the waste crate assay system (WCAS), has recently been installed in the Plutonium Facility at Los Alamos National Laboratory to assay non-compactible, plutonium-bearing waste packaged in oversized containers and crates. The instrument will be used for assaying both low-level waste (LLW) crates, which must be certified to contain less than 100 nCi/g, and transuranic (TRU) waste crates, which may contain up to a maximum of 325 g of plutonium minus two times of measurement uncertainty. The system consists of four slabs, each containing twenty 152 cm-long He-3 tubes. To reduce the effects of nearby materials andmore » changing background conditions on the measurements, the counter is configured to measure coincidence neutrons rather than totals, although the sensitivity is adversely affected in this mode. In the LLW measurement mode, the assay is performed with a variable count time based on the counting statistics. The LLW assay continues until sufficient information has been obtained to either certify or fail the crate with a 95% confidence level. The performance of the WCAS for measurements of both LLW and TRU waste has been evaluated. The capabilities and limitations of the instrument, including measurement times and precision for various plutonium loadings, will be presented in this report.« less
  • The Department of Energy requires improved technology for nuclear materials accounting as an essential part of new plutonium processing facilities. New facilities are being constructed at the Savannah River Plant by the Du Pont Company, Operating Contractor, to recover plutonium from scrap and waste material generated at SRP and other DOE contract processing facilities. This paper covers design concepts and planning required to incorporate state-of-the-art plutonium assay instruments developed at several national laboratories into an integrated, at-line nuclear material accounting facility operating in the production area.
  • The Department of Energy requires improved technology for nuclear materials accounting as an essential part of new plutonium processing facilities. New facilities are being constructed at the Savannah River Plant by the Du Pont Company, Operating Contractor, to recover plutonium from scrap and waste material generated at SRP and other DOE contract processing facilities. This paper covers design concepts and planning required to incorporate state-of-the-art plutonium assay instruments developed at several national laboratories into an integrated, at-line nuclear material accounting facility operating in the production area. 3 figures.