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Title: Instrument calibration and measurement plan for the poorly measured/unmeasured category of highly enriched uranium at Lawrence Livermore National Laboratory

In partial response to a Department of Energy (DOE) request to evaluate the state of measurements of special nuclear material, Lawrence Livermore National Laboratory (LLNL) evaluated and classified all highly enriched uranium (HEU) metal and oxide items in its inventory. Because of a lack of traceable HEU standards, no items were deemed to fit the category of well measured. A subsequent DOE-HQ sponsored survey by New Brunswick Laboratory resulted in their preparation of a set of certified reference material (CRM) standards for HEU oxide (U{sub 3}O{sub 8}) that are projected for delivery during September of 1999. However, CRM standards for HEU metal are neither in preparation nor are they expected to be prepared within the foreseeable future. Consequently, HEU metal working standards must be developed if the poorly measured/unmeasured portion of the LLNL inventory is to be reclassified. This paper describes the approach that LLNL will take to (1) develop a set of HEU metal working standards; (2) develop HEU metal and oxide calibration curves for the passive-active neutron (PAN) shuffler that are functions of mass, enrichment, size, and shape; and (3) reclassify the poorly measured/unmeasured inventory through direct measurement or reprocessing of previously archived data.
Authors:
;
Publication Date:
OSTI Identifier:
14740
Report Number(s):
UCRL-JC-133171; DP0102033
DP0102033; TRN: US0106231
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 40th Annual Meeting of the Institute of Nuclear Materials Management, Phoenix, AZ (US), 07/25/1999--07/29/1999; Other Information: PBD: 1 Jul 1999
Research Org:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org:
USDOE Office of Defense Programs (DP) (US)
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CALIBRATION; HIGHLY ENRICHED URANIUM; LAWRENCE LIVERMORE NATIONAL LABORATORY; NUCLEAR MATERIALS MANAGEMENT; CALIBRATION STANDARDS; URANIUM OXIDES U3O8; URANIUM; SAMPLE PREPARATION