Regulatory analysis for the resolution of Generic Safety Issue 29: Bolting degradation or failure in nuclear power plants
Generic Safety Issue (GSI)-29 deals with staff concerns about public risk due to degradation or failure of safety-related bolting in nuclear power plants. The issue was initiated in November 1982. Value-impact studies of a mandatory program on safety-related bolting for operating plants were inconclusive: therefore, additional regulatory requirements for operating plants could not be justified in accordance with provisions of 10 CFR 50.109. In addition, based on operating experience with bolting in both nuclear and conventional power plants, the actions already taken through bulletins, generic letters, and information notices, and the industry-proposed actions, the staff concluded that a sufficient technical basis exists for the resolution of GSI-29. The staff further concluded that leakage of bolted pressure joints is possible but catastrophic failure of a reactor coolant pressure boundary joint that will lead to significant accident sequences is highly unlikely. For future plants, it was concluded that a new Standard Review Plant section should be developed to codify existing bolting requirements and industry-developed initiatives. 9 refs., 1 tab.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (United States). Div. of Safety Issue Resolution
- Sponsoring Organization:
- USNRC; Nuclear Regulatory Commission, Washington, DC (United States)
- OSTI ID:
- 5078169
- Report Number(s):
- NUREG-1445; ON: TI92000949
- Country of Publication:
- United States
- Language:
- English
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Degradation and failure of bolting in nuclear power plants: Volume 1
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BOLTED JOINTS
RELIABILITY
FASTENERS
NUCLEAR POWER PLANTS
CORROSION
COST
COST BENEFIT ANALYSIS
CRACKS
FAILURES
IN-SERVICE INSPECTION
LOSS OF COOLANT
MAINTENANCE
PUMPS
REGULATIONS
RISK ASSESSMENT
STEAM GENERATORS
SUPPORTS
ACCIDENTS
BOILERS
CHEMICAL REACTIONS
ECONOMIC ANALYSIS
ECONOMICS
INSPECTION
JOINTS
MECHANICAL STRUCTURES
NUCLEAR FACILITIES
POWER PLANTS
REACTOR ACCIDENTS
THERMAL POWER PLANTS
VAPOR GENERATORS
220900* - Nuclear Reactor Technology- Reactor Safety
210700 - Nuclear Power Plants- Regulation & Licensing
220200 - Nuclear Reactor Technology- Components & Accessories