05000336/FIN-2008003-02: Difference between revisions

Finding

Title

Inadequate Maintenance Instructions Causes Reactor Coolant System Unidentified Leakage in Excess of Technical Specification Limits

Description

The inspectors identified a Green NCV of 10CFR50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for Dominions failure to provide adequate maintenance instructions for replacing the gaskets on the B low pressure safety injection (LPSI) pump suction line. Specifically, the work order did not contain torque requirements; as a result, the flanged joint was over-torqued and caused the flexitallic gasket to fail. Debris from the gasket prevented the B LPSI pump suction isolation valve from closing, and caused a reactor coolant system leak in excess of Technical Specification limits. Dominion declared an Unusual Event. Dominion replaced the gasket and repaired the valve. The performance deficiency was Dominions failure to provide adequate maintenance instructions for assembling the flanged connection, including appropriate torque values. This finding is more than minor because it is associated with the Human Performance attribute of the Initiating Event Cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown, as well as power operations. The inspectors conducted a Phase 1 screening in accordance with IMC 0609, Appendix G, Shutdown Operations Significance Determination Process; a quantitative assessment (Phase 2) was required because the finding increased the likelihood of a loss of RCS inventory. The Phase 2 analysis resulted in the finding being screened as having very low safety significance (Green) because the change in core damage frequency was in the range of low 1E-7. The finding has a cross cutting aspect in the area of Human Performance, Resources, because Dominion did not ensure complete, accurate, and up-to-date work packages for the replacement of the gaskets in the B LPSI pump suction line. H.2(c) (Section 4OA3.1)

02
Site:	Millstone
Report	IR 05000336/2008003 Section 4OA3
Date counted	Jun 30, 2008 (2008Q2)
Type:	NCV: Green
cornerstone	Initiating Events
Identified by:	NRC identified
Inspection Procedure:	IP 71153
Inspectors (proximate)	T Moslak J Lilliendahl J Benjamin J Krafty D Orr S Shaffer B Norris J Commiskey H Gray E Burket
CCA	H.7, Documentation
INPO aspect	WP.3
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v • d • e

Finding - Millstone - IR 05000336/2008003

4(2)9(0)201(0)1(0)2(3)3(3)5(0)6(3)7(0)8(2)402(0)403(0)502(0)10(0)

IR 05000336/2008003: 1 2 3

Finding List (Millstone) @ 2008Q2

CCA Matrix: 2008Q2

	Q	CCA	Title
05000336/FIN-2007007-01	2007Q4		Control Room Fire Evacuation Procedure
05000336/FIN-2008006-01	2008Q1	P.2	Failure to take adequate corrective actions for a condition affecting control room operability and temperature limits post-trip. (Section 4OA2.a.3.a)
05000336/FIN-2008006-02	2008Q1	P.3	Failure to take adequate corrective actions for a Unit 2 charging system common mode failure vulnerability. (Section 4OA2.a.3.b)
05000336/FIN-2008006-03	2008Q1		Failure to take adequate corrective actions for a condition adverse to quality involving a nonconservative IST procedure. (Section 4OA2.a.3.c)
05000336/FIN-2008002-01	2008Q1	P.2	Failure to Evaluate a Unit 2 Charging System Non-conforming Condition against the Current Licensing Bases (Section 1R15)
05000336/FIN-2008002-03	2008Q1	H.14	Failure to Identify a Service Water Bypass Flow Path following a Failed IST (Section 1R22)
05000336/FIN-2008002-02	2008Q1	P.1 P.1(a)	Failure to Identify Unacceptable Unit 2 Charging Pump Surveillance Test Data (Section 1R22)
05000336/FIN-2008003-02	2008Q2	H.7	Inadequate Maintenance Instructions Causes Reactor Coolant System Unidentified Leakage in Excess of Technical Specification Limits
05000336/FIN-2008003-01	2008Q2	P.2	Fire Protection Deficiency Resulting in Potential Loss of All Charging Pumps

Self-Identified List (Millstone)

	Q	Title
05000336/FIN-2008003-03	2008Q2	Licensee-Identified Violation

[Millstone Findings full list]

@@ Line 1: / Line 1: @@
 {{finding
-| title = Inadequate Maintenance Instructions Causes Reactor Coolant System Unidentified Leakage In Excess Of Technical Specification Limits
+| title = Inadequate Maintenance Instructions Causes Reactor Coolant System Unidentified Leakage in Excess of Technical Specification Limits
 | docket = 05000336, 05000423
 | inspection report = IR 05000336/2008003

05000336/FIN-2008003-02: Difference between revisions

Latest revision as of 22:05, 29 May 2018

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05000336/FIN-2008003-02: Difference between revisions

Latest revision as of 22:05, 29 May 2018

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