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Forwards LERs 78-013/01T-1,78-015/01T-1,79-019/03L-0 & 79-020/01T-0.

Accession Number: ML19263D333

Date Released: Friday, October 4, 2019

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• ML19263D332 - Forwards LERs 78-013/01T-1,78-015/01T-1,79-019/03L-0 & 79-020/01T-0. (2 page(s), 3/22/1979)
• ML19263D338 - LER 78-013/01T-1 on 781107:emergency diesel generator vendor,Colt Industries,notified util of speed switch design problem that could potentially fail.Switch replaced w/another part from different vendor. (4 page(s), 3/22/1979)
• ML19263D343 - LER 78-015/01T-1 on 781107:following discovery of improper speed switch in "A" emergency diesel generator,instrument technician installed replacement switch w/o approved job order.Caused by personnel error. (4 page(s), 3/22/1979)
• ML19263D346 - LER 79-019/03L-0 on 781031:w/both reactor coolant loops & associated steam generators in operation,one or more main steam line safety valves were inoperable.Caused by safety valve gagging.W/chronological log describing incidents. (2 page(s), 3/22/1979)
• ML19263D352 - LER 79-020/01T-0 on 781107:during controlled steam lift, discovered warn ring lockpin had broken on four occasions. Caused by lockpin fragility.Lockpins replaced w/ones of stronger design. (5 page(s), 3/22/1979)