Steam generator operating experience: Update for 1984-1986
This report summarizes operational events and degradation mechanisms affecting pressurized water reactor steam generator integrity, provides updated inspection results reported in 1984, 1985, and 1986, and highlights both prevalent problem areas and advances in improved equipment test practices, preventive measures, repair techniques, and replacement procedures. It describes equipment design features of the three major suppliers and discusses 68 plants in detail. Steam generator degradation mechanisms include intergranular stress corrosion cracking, primary water stress corrosion cracking, pitting, intergranular attack, and vibration wear that effects tube integrity and causes leakage. Plugging, sleeving heat treatment, peening, chemical cleaning, and steam generator replacements are described and regulatory instruments and inspection guidelines for nondestructive evaluations and girth weld cracking are discusses. The report concludes that although degradation mechanisms are generally understood, the elimination of unscheduled plant shutdowns and costly repairs resulting from leaking tubes has not been achieved. Highlights of steam generator research and unresolved safety issues are discussed. 21 refs., 8 tabs.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (USA). Div. of Engineering and System Technology; Science Applications International Corp., McLean, VA (USA)
- OSTI ID:
- 7014047
- Report Number(s):
- NUREG/CR-5150; SAIC-87/3014; ON: TI88012785
- Country of Publication:
- United States
- Language:
- English
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Steam generator operating experience, update for 1989--1990
Steam generator operating experience, update for 1989--1990
Related Subjects
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
BOILERS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CORROSION
CORROSION FATIGUE
CRACK PROPAGATION
CRACKS
DATA
DESIGN
ENERGY TRANSFER
FATIGUE
HEAT TRANSFER
INFORMATION
INTERGRANULAR CORROSION
JOINTS
MAINTENANCE
MATERIALS TESTING
MECHANICAL PROPERTIES
NONDESTRUCTIVE TESTING
NUMERICAL DATA
PWR TYPE REACTORS
REACTOR SAFETY
REACTORS
REGULATIONS
SAFETY
STEAM GENERATORS
STRESS CORROSION
SYNTHESIS
TESTING
TUBES
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
WEAR
WELDED JOINTS