Integrated safety assessment of an oxygen reduction project at Connecticut Yankee Atomic Power's Haddam Neck plant
Connecticut Yankee Atomic Power Company (CYAPCo) has implemented an Integrated Safety Assessment Program (ISAP) for the integrated evaluation and prioritization of plant-specific licensing issues, regulatory policy issues, and plant improvement projects. As part of the ISAP process, probabilistic risk assessment (PRA) is utilized to evaluate the net safety impact of plant modification projects. On a few occasions, implementation of this approach has resulted in the identification of projects with negative safety impacts that could not be quantified via the normal design review and 10CFR50.59 safety evaluation process. An example is a plant modification that was proposed to reduce the oxygen in the Haddam Neck plant's demineralized water storage tank (DWST). The project involved the design and installation of a nitrogen blanketing system on the DWST. The purpose of the project was to reduce the oxygen content on the secondary side, consistent with recommendations from the Electric Power Research Institute Steam Generator Owners Group. Oxygen is one of the contributors to the corrosion process in systems in contact with the feedwater and can cause damage to associated components if not controlled.
- Research Organization:
- Northeast Utilities Service Co., Hartford, CT (US)
- OSTI ID:
- 6342306
- Report Number(s):
- CONF-870837-; TRN: 89-011288
- Journal Information:
- Trans. Am. Nucl. Soc.; (United States), Vol. 54:1; Conference: 13. American Nuclear Society international meeting on nuclear power plant operation, Chicago, IL, USA, 30 Aug 1987
- Country of Publication:
- United States
- Language:
- English
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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
CONNECTICUT YANKEE REACTOR
LICENSING
RISK ASSESSMENT
NUCLEAR POWER PLANTS
REACTOR SAFETY EXPERIMENTS
PRESSURE VESSELS
CORROSION
DESIGN
EPRI
INSTALLATION
MODIFICATIONS
NITROGEN
OXYGEN
PROBABILISTIC ESTIMATION
RESEARCH PROGRAMS
CHEMICAL REACTIONS
CONTAINERS
ELEMENTS
ENRICHED URANIUM REACTORS
NONMETALS
NUCLEAR FACILITIES
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PWR TYPE REACTORS
REACTORS
THERMAL POWER PLANTS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
210700 - Nuclear Power Plants- Regulation & Licensing