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Title: Waste minimization measures associated with the analysis of {sup 137}Cs in coconut milk collected from the Marshall Islands

The Marshall Islands Environmental Characterization and Dose Assessment Program has recently implemented waste minimization measures to reduce low level radioactive (LLW) and low level mixed (LLWMIXED) waste streams at the Lawrence Livermore National Laboratory (LLNL). Several thousand environmental samples are collected annually from former US nuclear test sites in the Marshall Islands, and returned to LLNL for processing and radiometric analysis. In the past, we analyzed coconut milk directly by gamma-spectrometry after adding formaldehyde (as preservative) and sealing the fluid in metal cans. This procedure was not only tedious and time consuming but generated storage and waste disposal problems. We have now reduced the number of coconut milk samples required for analysis from 1500 per year to approximately 250, and developed a new analytical procedure which essentially eliminates the associated mixed radioactive waste stream. Coconut milk samples are mixed with a few grams of ammonium-molydophosphate (AMP) which quantitatively scavenges the target radionuclide cesium 137 in an ion-exchange process. The AMP is then separated from the mixture and sealed in a plastic container. The bulk sample material can be disposed of as a non- radioactive non-hazardous waste, and the relatively small amount of AMP conveniently counted by gamma-spectrometry, packaged and storedmore » for future use.« less
Authors:
; ; ;
Publication Date:
OSTI Identifier:
651791
Report Number(s):
UCRL-JC-130890; CONF-980654-
ON: DE98057714; BR: YN0100000
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 14. DOE pollution prevention conference, Seattle, WA (United States), 2-4 Jun 1998; Other Information: PBD: 1 May 1998
Research Org:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; 54 ENVIRONMENTAL SCIENCES; CESIUM 137; COCONUTS; MARSHALL ISLANDS; SAMPLING; WASTE MANAGEMENT; RADIOMETERS; AMP