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Title: Observation and Measurement of Se-79 in SRS High-Level Tank Fission Product Waste

The authors report the first observation of confirmed Se-79 activity in Savannah River Site high level fission product waste. Se-79 was measured after a seven step chemical treatment to remove interfering activity from Cs-137, Sr-90, and plutonium at levels 105 times higher than the observed Se-79 content and to remove Tc-99 at levels 300 times higher than observed Se-79. Se-79 was measured by liquid scintillation beta-decay counting after specific tests to eliminate uncertainties from possible contributions from Tc-99, Pm-147, Sm-151, Zr-93, or Pu-241, whose beta-decay spectra could appear similar to that of Se-79, and whose content would be expected at levels near or greater than Se-79.
Authors:
Publication Date:
OSTI Identifier:
761147
Report Number(s):
WSRC-MS-99-00341
TRN: US0004385
DOE Contract Number:
AC09-96SR18500
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, No location, No date; Other Information: PBD: 21 Aug 2000
Research Org:
Savannah River Site (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; SELENIUM 79; FISSION PRODUCTS; SAVANNAH RIVER PLANT; LIQUID SCINTILLATION DETECTORS; TANKS; HIGH-LEVEL RADIOACTIVE WASTES; CONCENTRATION RATIO