LER-1999-004, Forwards LER 99-004-01.Commitments Made by Util Are Encl |
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I' Nebraska Public Power District Nebraska's Energy Leader l
NLS990070 June 28,1999 l
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U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001 1
Gentlemen:
Subject:
Licensee Event Report No. 1999-004-01 Cooper Nuclear Station, NRC Docket 50-298, DPR-46 Revision 1 to the subject Licensee Event Report is forwarded as an enclosure to this letter.
Sincerely, N
M. F. Peckham Plant Manager
/rlb Enclosure cc: Regional Administrator USNRC - Region IV Senior Project Manager l
USNRC - NRR Project Directorate IV-1
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Senior Resident Inspector USNRC NPG Distribution INPO Records Center
,/ p' %'"
W. Turnbull
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MidAmerica Energy 9907070370 990628 PDR ADOCK 05000298 8
PDR U G [.~r O 31-Cooper Nuclear Station Po. Box 98/ Brownville, NE 683210098 1
Telephone: (Ml2) 825-3811/ Fax: (402) 825-5211 l
tw@ //www nppd com i
l' ATTACHMENT 3 LIST OF NRC COMMITMENTS l
Correspondence No:
NLS990070 The following table identifies those actions committed to by the District in this document.
Any other actions discussed in the submittal represent intended or i
l planned actions by the District.
They are described to the NRC for the NRC's information and are not regulatory commitments.
Please notify the NL&S Manager at Cooper Nuclear Station of any questions regarding this document or any associated regulatory commitments.
COMMITTED DATE
COMMITMENT
OR OUTAGE CNS will continue to monitor industry efforts for a proven solution to the corrosion bonding phenomenon which N/A results in SRVs lifting outside their Technical Specification Surveillance lift setpoint tolerance.
CNS will assign an individual to investigate the possibility of revising the existing CNS Technical N/A Specification SRV surveillance testing requirements to incorporate an SRV upper bound setpoint salue in the setpoint tolerance criteria.
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l PROCEDURE NUMBER O.42 l
REVISION NUMBER 6 l
PAGE 9 OF 13 l
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| 05000298/LER-1999-001, :on 990222,failure to Recognize Set Point Shift Caused Common Mode Failure of HPCI Pressure Switches. Pressure Switches Were Recalibrated & Returned to Svc & Operability Evaluation Performed |
- on 990222,failure to Recognize Set Point Shift Caused Common Mode Failure of HPCI Pressure Switches. Pressure Switches Were Recalibrated & Returned to Svc & Operability Evaluation Performed
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function
10 CFR 50.73(a)(2)(vii), Common Cause Inoperability
10 CFR 50.73(a)(2)(x) | | 05000298/LER-1999-002, :on 990406,determined That Four of Eight of RPS Scram Relays Were Not Being Response Time Tested as Required by TS 3.3.1.1.15.Caused by Inadequate Translation of Testing Requirements.Surveillance Procedure Revised.With |
- on 990406,determined That Four of Eight of RPS Scram Relays Were Not Being Response Time Tested as Required by TS 3.3.1.1.15.Caused by Inadequate Translation of Testing Requirements.Surveillance Procedure Revised.With
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function
10 CFR 50.73(a)(2)(vii), Common Cause Inoperability
10 CFR 50.73(a)(2)(iv), System Actuation
10 CFR 50.73(a)(2)(x)
10 CFR 50.73(a)(2)(iii)
10 CFR 50.73(a)(2)(viii)
10 CFR 50.73(a)(2) | | 05000298/LER-1999-004-01, Forwards LER 99-004-01.Commitments Made by Util Are Encl | Forwards LER 99-004-01.Commitments Made by Util Are Encl | | | 05000298/LER-1999-004, :on 990426,SRVs Were Found Outside TS Safety Function Lift Setpoint.Caused by Sufficient Corrosion Bonding.Srv Pilot Valve Assemblies Removed for Testing Were Replaced |
- on 990426,SRVs Were Found Outside TS Safety Function Lift Setpoint.Caused by Sufficient Corrosion Bonding.Srv Pilot Valve Assemblies Removed for Testing Were Replaced
| 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications | | 05000298/LER-1999-005, :on 990601,condition Prohibited by TSs Was Noted.Caused by Failure to Adequately Perform Logic Sys Functional Testing.Entered TS SR 3.0.3 & Temporarily Revised Affected Surveillance Procedures |
- on 990601,condition Prohibited by TSs Was Noted.Caused by Failure to Adequately Perform Logic Sys Functional Testing.Entered TS SR 3.0.3 & Temporarily Revised Affected Surveillance Procedures
| 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability
10 CFR 50.73(a)(2) | | 05000298/LER-1999-006, :on 990727,inadvertent half-group VII Isolation Was Noted.Caused by Deenergization of Relay.Reset PCIS-REL-K65 Relay & half-group VII Isolation |
- on 990727,inadvertent half-group VII Isolation Was Noted.Caused by Deenergization of Relay.Reset PCIS-REL-K65 Relay & half-group VII Isolation
| 10 CFR 50.73(a)(2)(iv), System Actuation
10 CFR 50.73(a)(2) | | 05000298/LER-1999-007, :on 990917,inoperable Sump Z Resulted in TS Required Shutdown.Caused by Inadequate Conduit Seal & Deficient Operating Procedure.Necessary Repairs Were Made & Deficient Procedure Was Revised.With |
- on 990917,inoperable Sump Z Resulted in TS Required Shutdown.Caused by Inadequate Conduit Seal & Deficient Operating Procedure.Necessary Repairs Were Made & Deficient Procedure Was Revised.With
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function
10 CFR 50.73(a)(2)(iv), System Actuation
10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown
10 CFR 50.73(a)(2)(viii) |
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