05000325/FIN-2018002-01

Finding

Title

Automatic Reactor Trip due to Perceived Loss of Stator Cooling Water

Description

A self-revealing Green finding (FIN) was identified for the failure to properly implement a modification to the turbine control system (TCS). The modification ultimately resulted in an automatic reactor trip on April 7, 2018, due to a turbine trip caused by a perceived loss of stator cooling water. The TCS system improperly generated a loss of stator cooling turbine trip when the TCS measured higher than expected stator cooling water flow rates

01
Site:	Brunswick
Report	IR 05000325/2018002 Section 4OA3
Date counted	Jun 30, 2018 (2018Q2)
Type:	Finding: Green
cornerstone	Initiating Events
Identified by:	Self-revealing
Inspection Procedure:	IP 71153
Inspectors (proximate)	S Rose G Smith J Steward W Loo J Panfel
CCA	H.3, Change Management
INPO aspect	LA.5
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v • d • e

Finding - Brunswick - IR 05000325/2018002

1(1)2(2)3(0)4(0)5(0)6(0)10(0)11(3)201(0)301(0)410(0)411(1)

IR 05000325/2018002: 2 1

Finding List (Brunswick) @ 2018Q2

CCA Matrix: 2018Q2

	Q	CCA	Title
05000324/FIN-2017004-01	2017Q4	H.8	Loss of Emergency 4160V Bus Due to Failure to Implement Procedure
05000324/FIN-2018001-01	2018Q1		Inadequate Instruction to Perform Inspections on Emergency Ventilation Dampers
05000324/FIN-2018011-01	2018Q2		Failure to Justify Qualified Life Extension of ASCO Solenoid Operated Valves
05000324/FIN-2018011-02	2018Q2		Failure to Evaluate Effects of MOV Space Heaters on Qualified Life
05000325/FIN-2018002-01	2018Q2	H.3	Automatic Reactor Trip due to Perceived Loss of Stator Cooling Water
05000324/FIN-2018002-02	2018Q2		Enforcement Action 18-080: Implementation of EGM 11-003, Revision 3, Enforcement Guidance Memorandum on Dispositioning Boiling Water Reactor Licensee Noncompliance with Technical Specification Containment Requirements during Operations with a Potential for Draining the Reactor Vessel (OPDRV)

Self-Identified List (Brunswick)

	Q	Title
05000324/FIN-2017003-01	2017Q3	Licensee-Identified Violation
05000324/FIN-2017004-02	2017Q4	Licensee-Identified Violation
05000324/FIN-2018011-03	2018Q2	Potential Unjustified Activation Energy for Rosemont Transmitters

[Brunswick Findings full list]

05000325/FIN-2018002-01

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