Aging assessment of auxiliary feedwater pumps

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5836823

Greenstreet, W L

ORNL is conducting aging assessments of auxiliary feedwater pumps to provide recommendations for monitoring and assessing the severity of time-dependent degradation as well as to recommend maintenance and replacement practices. Cornerstones of these activities are the identification of failure modes and causes and ranking of causes. Failure modes and causes of interest are those due to aging and service wear. Design details, functional requirements, and operating experience data were used to identify failure modes and causes and to rank the latter. Based on this input, potentially useful inspection, surveillance, and condition monitoring methods that are currently available for use or in the developmental stage were examined and recommendations made. The methods selected are listed and discussed in terms of use and information to be obtained. Relationships between inspection, surveillance, and monitoring and maintenance practices entered prominently into maintenance recommendations. These recommendations, therefore, embrace predictive as well as corrective and preventative maintenance practices. The recommendations are described, inspection details are discussed, and periodic inspection and maintenance interval guidelines are given. Surveillance testing at low-flow conditions is also discussed. It is shown that this type of testing can lead to accelerated aging.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5836823
• Report Number(s): CONF-8710111-3; ON: DE88001739
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
AGING
AUXILIARY SYSTEMS
AUXILIARY WATER SYSTEMS
FAILURE MODE ANALYSIS
FAILURES
FEEDWATER
HYDROGEN COMPOUNDS
INSPECTION
MAINTENANCE
MONITORING
OXYGEN COMPOUNDS
PUMPS
PWR TYPE REACTORS
REACTORS
SURVEILLANCE
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TESTING
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS