LER-1979-001, Forwards LER 79-001/99X-1 |
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| 2131979001R00 - NRC Website |
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CONDIECTICUT YANKEE ATOMIC POWER C O r.1 P A N Y 1,
7 HADDAM NECK PLANT RR = 1. E.OX 127E, CAST H AMPTON. CONN. 06424
's NA1
~.2.J._1 July 31, 1979 CYli 79-188 U. S. Nuclear Regulatory Commission Region 1 Office of Inspection and Enforcement 631 Park Avenue King of Prussia, Pennsylvania 19406 Attn:
Mr. Boyce Grier, Director Reference: Facility Operating License No. DPR-61 Docket No. 50-213 Reportable Occurrence LER 79-01/lT - Follow-up
Dear Mr. Grier:
This correspondence forwarco the follov-up report required to be submitted to Reportable Occurrence LER 79-01/lT, dated February 28, 1979 to Mr.
B.11. Grier f rom R. H. Graves.
An additional three copics of the report are enclosed.
Very truly yours, f
dw Richard H. Graves Station Superintendent RHG:JPD/j hb Attachment cc:
Dir., Office of Inspection and Enforce..
'!ashington, D. C.
(30)
Dir., Office of Management Info. & Program control, Wash., D. C.
(3) q 497 GM 79 08060301/
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| 05000213/LER-1979-001-99, /99X-1 on 790214:Updates RO 79-01/IT on 790228 Re Batch 8 Fuel Failures.Most Defective Assemblies Removed from Core.Cause of Fuel Failure Still Unknown. Discusses Status of Current & Planned Investigations | /99X-1 on 790214:Updates RO 79-01/IT on 790228 Re Batch 8 Fuel Failures.Most Defective Assemblies Removed from Core.Cause of Fuel Failure Still Unknown. Discusses Status of Current & Planned Investigations | | | 05000213/LER-1979-001-01, /01T-0 on 790214:examinations of Nine Batch 8 Fuel Assemblies Indicated Four Assemblies W/Cracks in Cladding of Peripheral Rods.Caused by Probable Brittle Fracture of Cladding | /01T-0 on 790214:examinations of Nine Batch 8 Fuel Assemblies Indicated Four Assemblies W/Cracks in Cladding of Peripheral Rods.Caused by Probable Brittle Fracture of Cladding | | | 05000213/LER-1979-001, Forwards LER 79-001/99X-1 | Forwards LER 79-001/99X-1 | | | 05000213/LER-1979-002-03, /03L on 790128:alarm Unit Failed to Indicate That Trip Light on Reactor Coolant loss-of-flow Trip Was Not Lit. Caused by Broken Lead from Setpoint Potentiometer.Soldered Joint Repaired & Unit Calibrated | /03L on 790128:alarm Unit Failed to Indicate That Trip Light on Reactor Coolant loss-of-flow Trip Was Not Lit. Caused by Broken Lead from Setpoint Potentiometer.Soldered Joint Repaired & Unit Calibrated | | | 05000213/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | | | 05000213/LER-1979-003-03, /03L-0 on 790215:diesel Fire Pump Failed to Start. Caused by Overload of Starter Motor Coil,Which Burned Open. Pump Reassembled & Starter Motor Rewound | /03L-0 on 790215:diesel Fire Pump Failed to Start. Caused by Overload of Starter Motor Coil,Which Burned Open. Pump Reassembled & Starter Motor Rewound | | | 05000213/LER-1979-003, Forwards LER 79-003/03L-0 | Forwards LER 79-003/03L-0 | | | 05000213/LER-1979-007-01, /01T-0 on 790707:one Category I Pipe Support on Svc Water Piping WS-121-5 Found Not to Be Seismic Type WS-RES-1 Specified on Drawing.Caused by Human Error.Existing Pipe Changed Immediately | /01T-0 on 790707:one Category I Pipe Support on Svc Water Piping WS-121-5 Found Not to Be Seismic Type WS-RES-1 Specified on Drawing.Caused by Human Error.Existing Pipe Changed Immediately | | | 05000213/LER-1979-007, Forwards LER 79-007/01T-0 | Forwards LER 79-007/01T-0 | | | 05000213/LER-1979-008, Forwards LER 79-008/01T-0 | Forwards LER 79-008/01T-0 | | | 05000213/LER-1979-008-01, /01T-0 on 790803:seismic-type Pipe Support AC-ER-31 Found Missing on Residual Heat Removal Piping Sys RWL-152-7.Caused by Oversight During Const.Support Installed | /01T-0 on 790803:seismic-type Pipe Support AC-ER-31 Found Missing on Residual Heat Removal Piping Sys RWL-152-7.Caused by Oversight During Const.Support Installed | | | 05000213/LER-1979-009-01, /01T-0:on 790831,discovered Potential Problem W/Turbocharger Thrust Bearing Lubrication.Caused by Lack of Maint on Oil Sys Pump.Manufacturer Developing Mod to Lubrication Sys | /01T-0:on 790831,discovered Potential Problem W/Turbocharger Thrust Bearing Lubrication.Caused by Lack of Maint on Oil Sys Pump.Manufacturer Developing Mod to Lubrication Sys | | | 05000213/LER-1979-009, Forwards LER 79-009/01T-0 | Forwards LER 79-009/01T-0 | | | 05000213/LER-1979-010-03, /03L-0:on 790813,pressurizer Power Operated Relief Valve 570 & Isolation Valve MOV-569 Opened.Caused by Failure of Light Source in Sigma Bistable of Pressure Controller. Light Source Replaced in Bistable | /03L-0:on 790813,pressurizer Power Operated Relief Valve 570 & Isolation Valve MOV-569 Opened.Caused by Failure of Light Source in Sigma Bistable of Pressure Controller. Light Source Replaced in Bistable | | | 05000213/LER-1979-010, Forwards LER 79-010/03L-0 | Forwards LER 79-010/03L-0 | | | 05000213/LER-1979-011-01, /01T-0:on 791004,18 seismic-type Restraints Found Missing from Three Svc Water Return Lines from Containment Air Recirculation Fan Coolers.Caused by Obscure Design Notation.Modified Restraints Installed | /01T-0:on 791004,18 seismic-type Restraints Found Missing from Three Svc Water Return Lines from Containment Air Recirculation Fan Coolers.Caused by Obscure Design Notation.Modified Restraints Installed | | | 05000213/LER-1979-011, Forwards LER 79-011/01T-0 | Forwards LER 79-011/01T-0 | |
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