Fault tree application to the study of systems interactions at Indian Point 3
This report describes an application of fault tree methods to search for systems interactions at Indian Point 3. This project was carried out in support of the resolution of Unresolved Safety Issue A-17 on Systems Interaction. Here, the methods are introduced, the findings are presented, and comments on the methods are offered. Findings are presented in the following manner. Systems interactions which may qualitatively violate regulatory requirements (regardless of their probability) are discussed; additionally, a probabilistically ranked list of system interactions is provided. This study resulted in the discovery of a previously undetected active single failure causing loss of low pressure injection. After verifying this finding, the licensee took immediate corrective actions, including a design modification to the switching logic for one of the safety buses, as well as procedural changes.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5904411
- Report Number(s):
- NUREG/CR-4207; BNL-NUREG-51872; ON: TI86009171
- Resource Relation:
- Other Information: Includes 33 sheets of 48x reduction microfiche
- Country of Publication:
- United States
- Language:
- English
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INDIAN POINT-3 REACTOR
REACTOR OPERATION
SYSTEMS ANALYSIS
AUXILIARY WATER SYSTEMS
DESIGN
ELECTRONIC CIRCUITS
FAULT TREE ANALYSIS
FEEDWATER
HEAT TRANSFER
HUMAN FACTORS
HYDRAULICS
LOSS OF COOLANT
PRESSURIZERS
REACTOR COOLING SYSTEMS
ACCIDENTS
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HYDROGEN COMPOUNDS
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OXYGEN COMPOUNDS
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REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTORS
SYSTEM FAILURE ANALYSIS
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WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled