High Purity Germanium Gamma-PHA Assay of Uranium Storage Pigs for 321-M Facility

Dewberry, R.A.

Savannah River Site (S.C.)

关键词: Calibration;    Material Unaccounted For;    Gamma Detection;    Storage Facilities;    Radiation Monitoring;   

DOI  :  10.2172/786670
RP-ID  :  WSRC-TR-2001-00031
RP-ID  :  AC09-96SR18500
RP-ID  :  786670

美国|英语

来源: UNT Digital Library

【 摘 要 】

The Analytical Development Section of SRTC was requested by the Facilities Disposition Division (FDD) to determine the holdup of enriched uranium in the 321-M facility as part of an overall deactivation project of the facility. The 321-M facility was used to fabricate enriched uranium fuel assemblies, lithium-aluminum target tubes, neptunium assemblies, and miscellaneous components for the production reactors. The facility also includes the 324-M storage building and the passageway connecting it to 321-M. The results of the holdup assays are essential for determining compliance with the Solid Waste's Waste Acceptance Criteria, Material Control and Accountability, and to meet criticality safety controls. This report describes and documents the use of a portable HPGe detector and EG and G Dart system that contains a high voltage power supply, signal processing electronics, a personal computer with Gamma-Vision software, and space to store and manipulate multiple 4096-channel g-ray spectra to assay for 235U content in 268 uranium shipping and storage pigs. This report includes a description of three efficiency calibration configurations and also the results of the assay. A description of the quality control checks is included as well.