05000336/FIN-2018010-03

Finding

Title

Failure to Correct Part 21 Power Supply Defects

Description

The team identified a finding of very low safety significance (Green) and associated NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings. Specifically, Dominion did not accomplish repairs to safety-related power supplies in accordance with instructions and procedures. The team identified that actions taken by Dominion to address Part 21 Report #48863, Foxboro Power Supply Potential Failures due to Defective Tie Wraps and Holder, were performed without procedure or engineering evaluations and the work activities performed were not documented. Specifically, instrumentation and control technicians altered the safety-related power supplies without approved design documents, plant procedures, or work orders, and records of the completed activities were not available

03
Site:	Millstone
Report	IR 05000336/2018010 Section 1R21
Date counted	Jun 30, 2018 (2018Q2)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.21M
Inspectors (proximate)	K Mangan M Patel J Brand J Rady C Lally C Baron J Nicely M Gray
Violation of:	10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion V
CCA	P.5, Operating Experience
INPO aspect	CL.1
'
v • d • e

Finding - Millstone - IR 05000336/2018010

1(0)1(0)2(0)3(1)4(0)5(0)6(0)10(5)11(1)301(0)403(1)410(1)501(0)

IR 05000336/2018010: 1 3 4 2 5

Finding List (Millstone) @ 2018Q2

CCA Matrix: 2018Q2

	Q	CCA	Title
05000336/FIN-2017007-01	2017Q3		Failure to Replace Auxiliary Feedwater Solenoid Valves within the Required Frequency
05000336/FIN-2017003-01	2017Q3	H.12	Inadequate Procedure Results in Inadvertent Lowering of Spent Fuel Pool Level
05000423/FIN-2017004-01	2017Q4	H.5	Failure to Maintain RCS Pressure during Solid Plant Cooldown
05000336/FIN-2018010-03	2018Q2	P.5	Failure to Correct Part 21 Power Supply Defects
05000336/FIN-2018010-01	2018Q2	P.2	Over-Duty Breakers on Safety-Related Buses on Unit 2
05000423/FIN-2018010-02	2018Q2	P.1	Over-Duty Breakers on Safety-Related Bus 34C on Unit 3
05000336/FIN-2018010-04	2018Q2	P.3	Flood Seals Not Installed in Unit 2 A EDG and Auxiliary Building Penetrations
05000423/FIN-2018010-05	2018Q2		Inadequate Test Control of ECCS Valve Interlocks
05000336/FIN-2018410-01	2018Q2	H.1	Security

Self-Identified List (Millstone)

[Millstone Findings full list]

05000336/FIN-2018010-03

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