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Title: Investigation of Flammable Gas Releases from High Level Waste Tanks during Periodic Mixing

Abstract

The Savannah River Site processes high-level radioactive waste through precipitation by the addition of sodium tetraphenylborate in a large (approximately 1.3 million gallon) High Level Waste Tank. Radiolysis of water produces a significant amount of hydrogen gas in this slurry. During quiescent periods the tetraphenylborate slurry retains large amounts of hydrogen as dissolved gas and small bubbles. When mixing pumps start, large amounts of hydrogen release due to agitation of the slurry. Flammability concerns necessitate an understanding of the hydrogen retention mechanism in the slurry and a model of how the hydrogen releases from the slurry during pump operation. Hydrogen concentration data collected from the slurry tank confirmed this behavior in the full-scale system. These measurements also provide mass transfer results for the hydrogen release during operation. The authors compared these data to an existing literature model for mass transfer in small, agitated reactors and developed factors to scale this existing model to the 1.3 million gallon tanks in use at the Savannah River Site. The information provides guidance for facility operations.

Authors:
Publication Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
4854
Report Number(s):
WSRC-MS-98-00791
ON: DE00004854
DOE Contract Number:  
AC09-96SR18500
Resource Type:
Conference
Resource Relation:
Conference: American Institute of Chemical Engineers, Miami Beach, FL (USA), 15-20 Nov 1998
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; High-Level Radioactive Wastes; Radioactive Waste Processing; Tanks; Hydrogen; Gases; Flammability

Citation Formats

Swingle, R F. Investigation of Flammable Gas Releases from High Level Waste Tanks during Periodic Mixing. United States: N. p., 1999. Web.
Swingle, R F. Investigation of Flammable Gas Releases from High Level Waste Tanks during Periodic Mixing. United States.
Swingle, R F. 1999. "Investigation of Flammable Gas Releases from High Level Waste Tanks during Periodic Mixing". United States. https://www.osti.gov/servlets/purl/4854.
@article{osti_4854,
title = {Investigation of Flammable Gas Releases from High Level Waste Tanks during Periodic Mixing},
author = {Swingle, R F},
abstractNote = {The Savannah River Site processes high-level radioactive waste through precipitation by the addition of sodium tetraphenylborate in a large (approximately 1.3 million gallon) High Level Waste Tank. Radiolysis of water produces a significant amount of hydrogen gas in this slurry. During quiescent periods the tetraphenylborate slurry retains large amounts of hydrogen as dissolved gas and small bubbles. When mixing pumps start, large amounts of hydrogen release due to agitation of the slurry. Flammability concerns necessitate an understanding of the hydrogen retention mechanism in the slurry and a model of how the hydrogen releases from the slurry during pump operation. Hydrogen concentration data collected from the slurry tank confirmed this behavior in the full-scale system. These measurements also provide mass transfer results for the hydrogen release during operation. The authors compared these data to an existing literature model for mass transfer in small, agitated reactors and developed factors to scale this existing model to the 1.3 million gallon tanks in use at the Savannah River Site. The information provides guidance for facility operations.},
doi = {},
url = {https://www.osti.gov/biblio/4854}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 07 00:00:00 EST 1999},
month = {Thu Jan 07 00:00:00 EST 1999}
}

Conference:
Other availability
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