Evaluation of a continuous /sup 14/C, /sup 129/I, and /sup 85/Kr monitor under dissolver off-gas conditions

Technical Report · Sat Oct 01 04:00:00 EDT 1983

DOI:https://doi.org/10.2172/5920975· OSTI ID:5920975

Fernandez, S. J.; McManus, G. J.; Burr, J. R.

A previously developed /sup 129/I, /sup 14/C, and /sup 85/Kr stack monitor was evaluated for use on dissolver off-gas streams. The effect of higher concentrations of H/sub 2/, Hg (a dissolution catalyst), and Cd (a common neutron poison) was measured in a series of laboratory tests. No significant effect on the sensitivity of the monitor was observed due to the presence of higher H/sub 2/ concentrations; but the variability did increase, probably due to condensation. Both Cd and Hg significantly reduced the sensitivity and increased the noise level of the monitor. Therefore, the /sup 129/I monitor, although suitable for stack monitoring, was considered unsuitable for dissolver off-gas streams containing high concentrations of Hg and Cd.

• Research Organization: Exxon Nuclear Idaho Co., Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-79ID01675
• OSTI ID: 5920975
• Report Number(s): ENICO-1135; ON: DE83017048
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON 14
CARBON ISOTOPES
DISSOLVERS
EVALUATION
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HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE 129
IODINE ISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KRYPTON 85
KRYPTON ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MONITORING
MONITORS
NUCLEI
ODD-EVEN NUCLEI
OFF-GAS SYSTEMS
RADIATION MONITORING
RADIATION MONITORS
RADIOISOTOPES
YEARS LIVING RADIOISOTOPES