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Forwards LERs 78-100/01X-1,79-006/03X-1,79-013/03L-0, 79-018/03L-0 & 79-019/03L-0.

Accession Number: ML19289D784

Date Released: Wednesday, October 30, 2019

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• ML19289D783 - Forwards LERs 78-100/01X-1,79-006/03X-1,79-013/03L-0, 79-018/03L-0 & 79-019/03L-0. (1 page(s), 3/12/1979)
• ML19289D787 - LER 78-100/01X-1 on 781108:field mod to reactor vessel lower head insulation was not seismically analyzed per FSAR. Caused by personnel error.Structural analysis performed & new mod is under development. (2 page(s), 3/9/1979)
• ML19289D789 - LER 79-006/03X-1 on 790111:damaged wiper seal found on hydraulic suppressor I-FW-HSS-233 & suppressor found inoperable on bypass line.Caused by improperly set poppet valves.Suppressor replaced w/operable spare. (2 page(s), 3/9/1979)
• ML19289D790 - LER 79-013/03L-0 on 790214:during normal operation,fire door S71-7 between auxiliary bldg & health physics found non- functional.Caused by bent phaser on left door.Phaser taped out of way & new phaser installed. (2 page(s), 3/9/1979)
• ML19289D791 - LER 79-018/03L-0 on 790214:during Mode 1 operation at 98% power,main steam trip valve 1-TV-MS-111B leaked excessively & was isolated for repair.Caused by deteriorated internal gasket.Valve isolated & gasket replaced. (2 page(s), 3/9/1979)
• ML19289D792 - LER 79-019/03L-0 on 790216:during surveillance,emergency diesel generator 1H did not reach 900 revolutions per minute in required 10-s.Probable cause was low ambient air temp. Conditions of first start were not reproducible. (2 page(s), 3/9/1979)