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Title: Predicting Peak Hydrogen Concentrations from Spontaneous Gas Releases in Hanford Waste Tanks

Abstract

Buoyant displacement gas release events (BDGRE) are spontaneous gas releases that occur in a few of the Hanford radioactive waste storage tanks when gas accumulation makes the sediment layer buoyant with respect to the liquid. BDGREs are assumed to be likely if the ratio of the predicted sediment gas fraction and neutral buoyancy gas fraction, or buoyancy ratio, exceeds unity. Based on the observation that the buoyancy ratio is also an empirical indicator of BDGRE size, a new methodology is derived that formally correlates the buoyancy ratio and the peak headspace hydrogen concentration resulting from BDGREs. The available data on the six historic BDGRE tanks, AN-103, AN-104, AN-105, AW-101, SY-103, and SY-101, are studied in detail to describe both the waste state and the corresponding distribution of BDGREs. The range of applicability of the buoyancy ratio-based models is assessed based on the modeling assumptions and availability of tank data. Recommendations are given for extending the range of the models applicability.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab., Richland, WA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15016741
Report Number(s):
PNNL-15238
830403000; TRN: US0503165
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 15 Jul 2005
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; AVAILABILITY; DISTRIBUTION; HYDROGEN; RADIOACTIVE WASTE STORAGE; RECOMMENDATIONS; SEDIMENTS; SIMULATION; TANKS; WASTES

Citation Formats

Stewart, Charles W, Hartley, Stacey A, Meyer, Perry A, and Wells, Beric E. Predicting Peak Hydrogen Concentrations from Spontaneous Gas Releases in Hanford Waste Tanks. United States: N. p., 2005. Web. doi:10.2172/15016741.
Stewart, Charles W, Hartley, Stacey A, Meyer, Perry A, & Wells, Beric E. Predicting Peak Hydrogen Concentrations from Spontaneous Gas Releases in Hanford Waste Tanks. United States. doi:10.2172/15016741.
Stewart, Charles W, Hartley, Stacey A, Meyer, Perry A, and Wells, Beric E. Fri . "Predicting Peak Hydrogen Concentrations from Spontaneous Gas Releases in Hanford Waste Tanks". United States. doi:10.2172/15016741. https://www.osti.gov/servlets/purl/15016741.
@article{osti_15016741,
title = {Predicting Peak Hydrogen Concentrations from Spontaneous Gas Releases in Hanford Waste Tanks},
author = {Stewart, Charles W and Hartley, Stacey A and Meyer, Perry A and Wells, Beric E},
abstractNote = {Buoyant displacement gas release events (BDGRE) are spontaneous gas releases that occur in a few of the Hanford radioactive waste storage tanks when gas accumulation makes the sediment layer buoyant with respect to the liquid. BDGREs are assumed to be likely if the ratio of the predicted sediment gas fraction and neutral buoyancy gas fraction, or buoyancy ratio, exceeds unity. Based on the observation that the buoyancy ratio is also an empirical indicator of BDGRE size, a new methodology is derived that formally correlates the buoyancy ratio and the peak headspace hydrogen concentration resulting from BDGREs. The available data on the six historic BDGRE tanks, AN-103, AN-104, AN-105, AW-101, SY-103, and SY-101, are studied in detail to describe both the waste state and the corresponding distribution of BDGREs. The range of applicability of the buoyancy ratio-based models is assessed based on the modeling assumptions and availability of tank data. Recommendations are given for extending the range of the models applicability.},
doi = {10.2172/15016741},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {7}
}

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