Development of Advanced In-Situ Techniques for Chemistry Monitoring and Corrosion Mitigation in SCWO Environments
- Pennsylvania State University
This project is developing sensing technologies and corrosion monitoring techniques for use in super critical water oxidation (SCWO) systems to reduce the volume of mixed low-level nuclear waste by oxidizing organic components in a closed cycle system where CO2 and other gaseous oxides are produced, leaving the radioactive elements concentrated in ash. The technique uses water at supercritical temperatures under highly oxidized conditions by maintaining a high fugacity of molecular oxygen in the system, which causes high corrosion rates of even the most corrosive resistant reactor materials. This project significantly addresses the high corrosion shortcoming through development of (a) advanced electrodes and sensors for in situ potentiometric monitoring of pH in high subcritical and supercritical aqueous solutions, (b) an approach for evaluating the association constants for 1-1 aqueous electrolytes using a flow-through electrochemical thermocell; (c) an electrochemical noise sensor for the in situ measurement of corrosion rate in subcritical and supercritical aqueous systems; (d) a model for estimating the effect of pressure on reaction rates, including corrosion reactions, in high subcritical and supercritical aqueous systems. The project achieved all objectives, except for installing some of the sensors into a fully operating SCWO system.
- Research Organization:
- Pennsylvania State Univ., University Park, PA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- FG07-96ER62303
- OSTI ID:
- 781020
- Report Number(s):
- DOE/ER/62303; Project Number 55171; Project Number 55171
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of advanced in situ techniques for chemistry monitoring and corrosion mitigation in SCWO environments. 1997 annual progress report
Corrosion testing and prediction in SCWO environments
Development of advanced in-situ techniques for chemistry monitoring and corrosion mitigation in SCWO environments. 1998 annual progress report
Technical Report
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Wed Oct 01 00:00:00 EDT 1997
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OSTI ID:13442
Corrosion testing and prediction in SCWO environments
Conference
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Sat Dec 30 23:00:00 EST 1995
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OSTI ID:435660
Development of advanced in-situ techniques for chemistry monitoring and corrosion mitigation in SCWO environments. 1998 annual progress report
Technical Report
·
Mon Jun 01 00:00:00 EDT 1998
·
OSTI ID:13443
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
47 OTHER INSTRUMENTATION
CHEMICAL REACTION KINETICS
CORROSION MONITORING
CORROSION PROTECTION
CORROSION RATES
ELECTROCHEMICAL NOISE SENSOR
LOW-LEVEL RADIOACTIVE WASTES
MATHEMATICAL MODELS
MONITORING
ON-LINE MEASUREMENT SYSTEMS
ORGANIC COMPOUNDS
OXIDATION
POTENTIOMETRIC MONITORING
RADIOACTIVE WASTE PROCESSING
SENSING
SUPER CRITICAL WATER OXIDATION (SCWO)
SUPERCRITICAL GAS EXTRACTION
VOLUME REDUCTION
47 OTHER INSTRUMENTATION
CHEMICAL REACTION KINETICS
CORROSION MONITORING
CORROSION PROTECTION
CORROSION RATES
ELECTROCHEMICAL NOISE SENSOR
LOW-LEVEL RADIOACTIVE WASTES
MATHEMATICAL MODELS
MONITORING
ON-LINE MEASUREMENT SYSTEMS
ORGANIC COMPOUNDS
OXIDATION
POTENTIOMETRIC MONITORING
RADIOACTIVE WASTE PROCESSING
SENSING
SUPER CRITICAL WATER OXIDATION (SCWO)
SUPERCRITICAL GAS EXTRACTION
VOLUME REDUCTION