Improved instrument setpoints for extended surveillance intervals

Conference · Mon Jan 01 04:00:00 EST 1990 · Transactions of the American Nuclear Society; (United States)

OSTI ID:6843694

Bockhorst, R M; Quinn, E L; Brodbeck, W J

San Onofre Nuclear Generating Station (SONGS) units 2 and 3 have both entered a nominal 24-month fuel cycle. The technical specifications for the following systems previously included requirements for the performance of preventive maintenance (PM) at 18-month intervals: (1) reactor protection system (RPS); (2) engineered safety features actuation system (ESFAS); (3) remote shutdown system (RSD); and (4) accident monitoring system (AMS). To avoid the need for an otherwise unnecessary unit shutdown, an evaluation was initiated by Southern California Edison (SCE) to determine if the surveillance intervals for technical specification PM could be extended to support the 24-month fuel cycle. The evaluation has been completed for the first three systems listed above (the AMS evaluation is still in progress). This evaluation showed that the extension of the maintenance interval to 24 months (nominal) could be safely accomplished. The two key areas of drift and setpoint analysis are covered in detail in this paper.

• OSTI ID: 6843694
• Report Number(s): CONF-901101--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 62
• 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
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
BOILERS
CALIBRATION
CONTROL
COOLING SYSTEMS
ELECTRONIC EQUIPMENT
EMERGENCY PLANS
ENGINEERED SAFETY SYSTEMS
ENRICHED URANIUM REACTORS
EQUIPMENT
FUEL MANAGEMENT
MAINTENANCE
MECHANICAL VIBRATIONS
NATIONAL ORGANIZATIONS
PERFORMANCE
POWER REACTORS
POWER SUPPLIES
PRESSURIZERS
PRIMARY COOLANT CIRCUITS
PWR TYPE REACTORS
QUALITY ASSURANCE
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR INSTRUMENTATION
REACTOR MAINTENANCE
REACTOR MONITORING SYSTEMS
REACTOR PROTECTION SYSTEMS
REACTORS
REMOTE CONTROL
SAN ONOFRE-2 REACTOR
SAN ONOFRE-3 REACTOR
SPECIFICATIONS
STEAM GENERATORS
THERMAL REACTORS
US NRC
US ORGANIZATIONS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS