Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Use GIVING24 at checkout to save 20% on eCourses and books (some exclusions apply)!

51315-5433-A Bayesian Network Based Approach to Corrosion Risk Assessment of Radioactive Waste Tanks

Picture for A Bayesian Network Based Approach to Corrosion Risk Assessment of Radioactive Waste Tanks
Available for download

The Hanford site contains approximately 55 million gallons of radioactive and chemically hazardous wastes arising from weapons production. This paper will present a Bayesian framework to model the probability of tank failures at Hanford and illustrate its use for tanks that are already known to have failed and leaked waste.

Product Number: 51315-5433-SG
ISBN: 5433 2015 CP
Author: Narasi Sridhar
Publication Date: 2015
Industries: Military , Corrosion Monitoring and Control
$0.00
$20.00
$20.00

The radioactive waste tanks arising from the U.S. nuclear weapons program have undergone a complex history of design construction and operations over the last seven decades. The Hanford site contains approximately 55 million gallons of radioactive and chemically hazardous wastes arising from weapons production beginning with World War II and continuing through the Cold War. The wastes are stored in 177 underground storage tanks of which 149 are single-shell tanks (SSTs) and the remaining tanks are double-shell tanks (DSTs). The U.S. Department of Energy Office of River Protection is responsible for retrieving the tank wastes treating them in order to encapsulate them in glass logs and then permanently close the tanks and associated facilities. Current plans call for transferring the wastes from the SSTs into the DSTs over the next 25 years or so retrieving wastes from the DSTs and vitrifying them and closing all tanks by approximately 2048. Such a time line places a great emphasis on maintaining the integrity of both types of tanks. The single shell tanks that were originally built have suffered from corrosion and stress corrosion cracking while the double shell tanks that were constructed later are showing signs of corrosion and possible SCC of their primary containment. Predicting the future behavior of these tanks requires a thorough understanding of the mechanisms of various failure modes and an accurate characterization of the internal environment and the metallurgical state of the tanks. However despite a continuous monitoring process there are many uncertainties about the internal environments of the tanks. There are also uncertainties in the metallurgical and stress state of the tanks due to the age of these tanks. Finally there are uncertainties in our understanding of the factors leading to corrosion and SCC failures. Therefore a probabilistic assessment of tank failure is appropriate and because of the complex interplay of many factors a Bayesian network approach will be valuable. This paper will present a Bayesian framework to model the probability of tank failures at Hanford and illustrate its use for tanks that are already known to have failed and leaked waste. The consequences of leaks (the other part of the risk calculus) are not addressed in this paper.

Key words: Radioactive waste, tank, probability, pitting, stress corrosion cracking,  conference papers, 2015 conference papers, downloadable

The radioactive waste tanks arising from the U.S. nuclear weapons program have undergone a complex history of design construction and operations over the last seven decades. The Hanford site contains approximately 55 million gallons of radioactive and chemically hazardous wastes arising from weapons production beginning with World War II and continuing through the Cold War. The wastes are stored in 177 underground storage tanks of which 149 are single-shell tanks (SSTs) and the remaining tanks are double-shell tanks (DSTs). The U.S. Department of Energy Office of River Protection is responsible for retrieving the tank wastes treating them in order to encapsulate them in glass logs and then permanently close the tanks and associated facilities. Current plans call for transferring the wastes from the SSTs into the DSTs over the next 25 years or so retrieving wastes from the DSTs and vitrifying them and closing all tanks by approximately 2048. Such a time line places a great emphasis on maintaining the integrity of both types of tanks. The single shell tanks that were originally built have suffered from corrosion and stress corrosion cracking while the double shell tanks that were constructed later are showing signs of corrosion and possible SCC of their primary containment. Predicting the future behavior of these tanks requires a thorough understanding of the mechanisms of various failure modes and an accurate characterization of the internal environment and the metallurgical state of the tanks. However despite a continuous monitoring process there are many uncertainties about the internal environments of the tanks. There are also uncertainties in the metallurgical and stress state of the tanks due to the age of these tanks. Finally there are uncertainties in our understanding of the factors leading to corrosion and SCC failures. Therefore a probabilistic assessment of tank failure is appropriate and because of the complex interplay of many factors a Bayesian network approach will be valuable. This paper will present a Bayesian framework to model the probability of tank failures at Hanford and illustrate its use for tanks that are already known to have failed and leaked waste. The consequences of leaks (the other part of the risk calculus) are not addressed in this paper.

Key words: Radioactive waste, tank, probability, pitting, stress corrosion cracking,  conference papers, 2015 conference papers, downloadable

Product tags
Also Purchased
Picture for 02193 Corrosion Performance of AI 2519...
Available for download

02193 Corrosion Performance of AI 2519 in Marine Environments

Product Number: 51300-02193-SG
ISBN: 02193 2002 CP
Author: Richard A. Hays, Edward B. Bieberich, and Andrew D. Sheetz
Publication Date: 2002
$20.00

Structural, ballistic, and mobility requirements have led to the selection of aluminum alloy 2519 as the primary structural material for the Advanced Amphibious Assault Vehicle (AAAV).  Two-year seawater alternate immersion exposures of welded AI 2519 panels with and without protective coatings were conducted to simulate the expected AAAV service environment.
Picture for 11334 Green Shelters Dehumidification for Corrosion Attenuation & Improved Maintenance Flexibility
Available for download

11334 Green Shelters Dehumidification for Corrosion Attenuation & Improved Maintenance Flexibility

Product Number: 51300-11334-SG
ISBN: 11334 2011 CP
Author: Doug Banning
Publication Date: 2011
$20.00

Corrosion prevention and control for equipment is a costly and decreasingly effective activity for the Air Force, especially under scenarios to austere locations.  One concept for remedy is a modular shelter, powered with mobile generators using integrated energy sources to reduce operational costs. 
Picture for Corrosion of Ni-based Alloys and Stainless Steels in Mixed Acids and Salts—Experimental and Modeling
Available for download

51315-5430-Corrosion of Ni-based Alloys and Stainless Steels in Mixed Acids and Salts—Experimental and Modeling Results

Product Number: 51315-5430-SG
ISBN: 5430 2015 CP
Author: Narasi Sridhar
Publication Date: 2015
$0.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support