05000293/FIN-2018002-03

Finding

Title

480V Bus B6 Auto Transfer Function Degraded Due to Time Delay Relay Failure

Description

The inspectors identified a Severity Level IV NCV of TS 3.5.A.2 because a component of the low pressure coolant injection system was inoperable between May 12, 2015, and May 3, 2017, during which time, on occasions, core spray systems were also not operable. Specifically, a relay, used to transfer the power feed for the low pressure coolant injection valves to the backup source in the event of a degraded voltage condition, failed during testing. As a result, under certain conditions, the transfer would not have automatically occurred. This condition existed through the operating cycle, during which time the core spray pumps were also inoperable when removed from service for scheduled maintenance.

03
Site:	Pilgrim
Report	IR 05000293/2018002 Section 4OA3
Date counted	Jun 30, 2018 (2018Q2)
Type:	TEV: Severity level IV
cornerstone	No Cornerstone
Identified by:	NRC identified
Inspection Procedure:	IP 71153
Inspectors (proximate)	E Carfang B Pinson P Boguszewski J Ambrosini S Wilson D Kern M Rossi M Mclaughlin A Dimitriadis
Violation of:	Technical Specification
INPO aspect
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v • d • e

Finding - Pilgrim - IR 05000293/2018002

1(0)2(6)3(1)4(0)5(0)6(0)10(0)11(0)12(0)13(0)15(0)410(1)411(0)501(0)

IR 05000293/2018002: 1 2 3 4 5 6

Finding List (Pilgrim) @ 2018Q2

CCA Matrix: 2018Q2

	Q	CCA	Title
05000293/FIN-2017405-01	2017Q3	P.3	Security
05000293/FIN-2017405-02	2017Q3	P.2	Security
05000293/FIN-2017007-01	2017Q3		Failure to Incorporate the Correct Design Limit for the Condensate Storage Tank Water Temperature
05000293/FIN-2017007-02	2017Q3	H.12	Inadequate Design Verification of Emergency Diesel Generator Under- Frequency Alarm Setpoint
05000293/FIN-2017403-01	2017Q3	P.2	Security
05000293/FIN-2017403-02	2017Q3		Security
05000293/FIN-2018002-01	2018Q2	P.3	Failure to Properly Implement the Fatigue Management Program Work Hour Controls for Covered Workers
05000293/FIN-2018002-02	2018Q2	H.9	Loss of Secondary Containment Integrity due to Simultaneously Opened Airlock Doors
05000293/FIN-2018002-03	2018Q2		480V Bus B6 Auto Transfer Function Degraded Due to Time Delay Relay Failure
05000293/FIN-2018410-01	2018Q2	P.3	Security

Self-Identified List (Pilgrim)

	Q	Title
05000293/FIN-2017403-03	2017Q3	Licensee-Identified Violation
05000293/FIN-2017403-04	2017Q3	Licensee-Identified Violation
05000293/FIN-2018002-04	2018Q2	Licensee-Identified Violation
05000293/FIN-2018002-05	2018Q2	Licensee-Identified Violation
05000293/FIN-2018002-06	2018Q2	Minor Violation

[Pilgrim Findings full list]

05000293/FIN-2018002-03

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