05000373/FIN-2018001-01

Finding

Title

Post-Maintenance Testing Failed to Demonstrate Testable Check Valve Function

Description

A self-revealed Green finding of very low safety significance and an associated Non-Cited Violation (NCV) of 10 CFR 50, Appendix B, Criterion XI, Test Control, was documented by the inspectors for the licensees failure to perform post-maintenance testing that would demonstrate that structures, systems and components (SSCs) would perform satisfactorily in service. Specifically, following maintenance on the Unit 2 B residual heat removal (RHR) shutdown cooling (SDC) return testable check valve, 2E12F050B, and the Unit 1 A RHR SDC return testable check valve, 1E12F050A, the post maintenance test performed failed to identify that they would not open fully when in service, resulting in the valves being unable to pass full flow during SDC mode of RHR operation.

01
Site:	LaSalle
Report	IR 05000373/2018001 Section 1R15
Date counted	Mar 31, 2018 (2018Q1)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	Self-revealing
Inspection Procedure:	IP 71111.15
Inspectors (proximate)	R Ruiz J Havertape W Schaup C Zoia B Dickson
Violation of:	10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion XI
INPO aspect	WP.1
'
v • d • e

Finding - LaSalle - IR 05000373/2018001

1(3)2(4)3(8)4(0)5(0)6(0)10(1)11(0)201(1)301(0)410(0)411(0)412(1)413(0)503(0)

IR 05000373/2018001: 1 2 3

Finding List (LaSalle) @ 2018Q1

CCA Matrix: 2018Q1

	Q	CCA	Title
05000373/FIN-2017008-01	2017Q3	H.6	Failure to Correctly Evaluate/Justify Post-Accident Operability Qualification for the Reliance Motor 1(2)VY03C RHR Pumps RoomCooling Fan
05000373/FIN-2017008-02	2017Q3		Failure to have Adequate Justification for Extending the life of Lubricant used in EQ Motor Bearings
05000373/FIN-2017003-01	2017Q3	P.2	Inadequate Maintenance Rule Monitoring of the Low Pressure Core Spray System
05000373/FIN-2017004-01	2017Q4		Complete versus Truncated Shifts on Proficiency Watches
05000374/FIN-2017010-01	2017Q4	H.8	Failure To Ensure Fire Door Was Engaged And Pinned
05000373/FIN-2017004-02	2017Q4	H.5	Failure to Establish Brazing Repair Procedures with Appropriate Acceptance Criteria
05000373/FIN-2017004-03	2017Q4		Primary Containment Structure, Suppression Pool Columns, Downcomer Vent and Downcomer Vent Bracing Did Not Meet Seismic Category I Requirements
05000373/FIN-2017004-04	2017Q4		Failure of Offsite Power Backfeed Procedure to be Appropriate to the Circumstances Caused Unit 1 Scram
05000373/FIN-2018001-01	2018Q1		Post-Maintenance Testing Failed to Demonstrate Testable Check Valve Function
05000373/FIN-2018001-02	2018Q1		Failure to Update Throttle Valve Position in Accordance with Station Procedures
05000373/FIN-2018001-03	2018Q1		Enforcement Action (EA) 18035: Licensee Implementation of Enforcement Guidance Memorandum 15002, Enforcement Discretion for Tornado-Generated Missile Protection Noncompliance

Self-Identified List (LaSalle)

[LaSalle Findings full list]

05000373/FIN-2018001-01

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