Steam generator tube staking at the San Onofre nuclear generating station

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Radiation Protection Management; (United States)

OSTI ID:5282485

Schofield, R S; Harberts, C N ^[1]

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1. Southern California Edison Co., San Onofre Nuclear Generating Station, San Clemente, CA (US)

San Onofre Nuclear Generating Station (SONGS) is a three-unit pressurized water reactor site. This paper reports that SONGS 1 is a 450 MWe Westinghouse unit, while SONGS 2 and 3 are 1150 MWe Combustion Engineering units. SONGS 2 in 1983, and SONGS 3 in 1984. Steam generator primary-to-secondary leakage occurred in SONGS 2 in June of 1984, and in SONGS 3 in July and October of 1984. These leaks resulted in forced outages for leak testing, eddy current testing, and tube plugging. SONGS 2 shut down for its first refueling outage in October 1984, and as a precaution, 100% of its in-service steam generator tubes were eddy current tested. Many ECT indications were found in tubes around the inner periphery of the tube bundle stay cylinder on both generators. These indications were located in the U-bend regions of the tubes at the intersection of the tubes and the diagonal support spacer straps or batwings. Based on testing and analysis, 39 tubes in each steam generator were required to be plugged and staked to ensure that they would remain intact through the second fuel cycle.

• OSTI ID: 5282485
• Journal Information: Radiation Protection Management; (United States), Journal Name: Radiation Protection Management; (United States) Vol. 3:2; ISSN 0740-0640; ISSN RPMAE
• 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
BOILERS
EDDY CURRENT TESTING
ELECTROMAGNETIC TESTING
ENRICHED URANIUM REACTORS
LEAK TESTING
MATERIALS TESTING
NONDESTRUCTIVE TESTING
OUTAGES
POWER REACTORS
PWR TYPE REACTORS
REACTOR SHUTDOWN
REACTORS
SAN ONOFRE-1 REACTOR
SAN ONOFRE-2 REACTOR
SAN ONOFRE-3 REACTOR
SHUTDOWN
STEAM GENERATORS
TESTING
THERMAL REACTORS
TUBES
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS