05000296/FIN-2017004-02

Finding

Title

Failure to Perform an IDO without delay for 3A EDG after Observing Indications of a Degraded Condition

Description

The inspectors identified a NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures and Drawings, for failure to perform an immediate operability determination (IDO) for 3A Emergency Diesel Generator (EDG) upon discovering a degraded condition. Specifically, on December 19, 2017, the licensee failed to perform an IDO after identifying and confirming less than minimum cooling flow, thus leaving the EDG in an indeterminate state of operability.The performance deficiency is more than minor because it was associated with the equipment performance attribute and affected the associated cornerstone objective to ensure availability, reliability and capability of systems that respond to initiating events to prevent undesirable consequences. As a corrective action, the licensee performed operations to restore flow within the acceptable range and performed an IDO. The violation was entered into the licensee's CAP as CR 1370601. The inspectors determined that the finding had a cross-cutting aspect in the human performance area of H.13, Consistent Process, because the performance deficiency was caused by not following a consistent, systematic approach to making a decision concerning operability of the affected DG.

02
Site:	Browns Ferry
Report	IR 05000296/2017004 Section 1R15
Date counted	Dec 31, 2017 (2017Q4)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.15
Inspectors (proximate)	D Dumbacher M Kirk A Ruh N Hobbs R Patterson M Riley M Schwieg D Lanyi A Masters
Violation of:	10 CFR 50 Appendix B Criterion V
CCA	H.13, Consistent Process
INPO aspect	DM.1
'
v • d • e

Finding - Browns Ferry - IR 05000296/2017004

1(5)2(5)3(2)4(3)7(0)301(0)403(0)404(0)405(1)406(1)407(0)408(1)502(0)8(0)

IR 05000296/2017004: 3 1 2

Finding List (Browns Ferry) @ 2017Q4

CCA Matrix: 2017Q4

	Q	CCA	Title
05000260/FIN-2017001-01	2017Q1		Failure to Take Corrective Actions to Preclude a Repeat Failure of a Containment Isolation Valve
05000259/FIN-2017001-02	2017Q1	H.4	Unauthorized Entry into a High Radiation Area
05000259/FIN-2017001-03	2017Q1	H.12	Failure to Perform Airborne Radioactivity Surveys
05000259/FIN-2017001-04	2017Q1		Failure to Control the Issuance of Instructions and Drawings for Transformer Replacements
05000259/FIN-2017406-01	2017Q1	H.12	Security
05000259/FIN-2017002-02	2017Q2		Non -conservative Assumptions in Emergency Drain Capacity Design Review
05000259/FIN-2017002-01	2017Q2	H.12	Inadequate Fire Risk Evaluation for Postulated Fires Affecting EECW Strainers
05000259/FIN-2017002-03	2017Q2	H.6	Failure to Assure EECW Design Basis Capability
05000260/FIN-2017002-04	2017Q2	H.11	Failure to Implement Corrective Actions to Prevent the Recurrence of a Reactor Scram Due to IRM spiking
05000259/FIN-2017408-01	2017Q2		Security
05000259/FIN-2017003-01	2017Q3	P.6	Degraded EDG Flood Door Seals
05000259/FIN-2017003-02	2017Q3	H.12	Failure to Maintain Intake Building Flood Barrier
05000296/FIN-2017004-02	2017Q4	H.13	Failure to Perform an IDO without delay for 3A EDG after Observing Indications of a Degraded Condition
05000260/FIN-2017004-01	2017Q4	P.2	Inadequate Determination of Operability for the HPCI System

Self-Identified List (Browns Ferry)

	Q	Title
05000259/FIN-2017405-01	2017Q1	Licensee-Identified Violation
05000259/FIN-2017001-05	2017Q1	Licensee-Identified Violation
05000259/FIN-2017002-05	2017Q2	Licensee-Identified Violation
05000259/FIN-2017004-03	2017Q4	Licensee-Identified Violation

[Browns Ferry Findings full list]

05000296/FIN-2017004-02

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