05000277/FIN-2018003-02

Finding

Title

Inadequate Corrective Actions Result in the Failure of the E-3 EDG

Description

The inspectors identified a self-revealing preliminary White finding associated with an apparent violation of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, because Exelon did not perform adequate corrective actions on the E-3 EDG scavenging air check valve assembly. Specifically, Exelon did not perform an adequate repair of an interference fit pin joint during maintenance activities in April 2017 and did not correct an oil leak on the check valve dashpot assembly identified in September 2017, which resulted in the E-3 EDG failure on June 13, 2018.

02
Site:	Peach Bottom
Report	IR 05000277/2018003 Section 4OA3
Date counted	Sep 30, 2018 (2018Q3)
Type:	AV: White
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71153
Inspectors (proximate)	J Heinly B Smith J Bridge F Arner D Beacon C Bickett J Cassata M Orr J Schoppy D Pelton
Violation of:	10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion XVI
CCA	H.11, Challenge the Unknown
INPO aspect	QA.2
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v • d • e

Finding - Peach Bottom - IR 05000277/2018003

1(0)1(1)2(1)3(3)4(0)5(0)6(0)10(3)11(0)12(0)13(0)410(1)501(0)

IR 05000277/2018003: 1 2 3

Finding List (Peach Bottom) @ 2018Q3

CCA Matrix: 2018Q3

	Q	CCA	Title
05000278/FIN-2018001-01	2018Q1		Untimely Corrective Actions to Address Primary Containment Isolation Valve Condition Adverse to Quality
05000277/FIN-2018002-01	2018Q2	P.1	Failure to Identify and Promptly Correct a Condition Adverse to Quality Concerning Battery Charger 2B-003-1
05000277/FIN-2018010-01	2018Q2	P.2	Failure to Identify Time-Critical Action
05000277/FIN-2018010-02	2018Q2		Failure to Develop and Maintain Mitigating Strategy
05000277/FIN-2018003-01	2018Q3	P.2	HPCI System Exhaust Pressure Switches Exceeded Documented Qualified Life
05000277/FIN-2018003-02	2018Q3	H.11	Inadequate Corrective Actions Result in the Failure of the E-3 EDG
05000277/FIN-2018003-03	2018Q3		Reactor Core Isolation Cooling System Pressure Switch Failure Results in Condition Prohibited by TS - EA-18-108
05000277/FIN-2018410-01	2018Q3	H.8	Security

Self-Identified List (Peach Bottom)

	Q	Title
05000277/FIN-2018010-03	2018Q2	Licensee-Identified Violation

[Peach Bottom Findings full list]

05000277/FIN-2018003-02

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