05000275/FIN-2018003-02

Finding

Title

4 kV Vital Switchgear Room Ventilation Degraded or Non-Conforming Condition and Associated Compensatory Measure Not Corrected in a Timely Manner

Description

The inspectors identified a Green, non-cited violation of 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, because PG&E personnel failed to promptly correct a degraded or non-conforming condition associated with an open operability condition. Specifically, PG&E personnel did not promptly correct a degraded condition associated with an open operability determination and corresponding compensatory measure related to Unit 1 and Unit 2, 4 kV vital switchgear ventilation for a period of over 4 years. This time period included two refueling outages for Unit 1 and three refueling outages for Unit 2.

02
Site:	Diablo Canyon
Report	IR 05000275/2018003 Section 4OA2
Date counted	Sep 30, 2018 (2018Q3)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71152
Inspectors (proximate)	C Newport J Reynoso R Alexander L Carson N Greene P Hernandez E Simpson L Brookhart C Osterholtz M Haire
Violation of:	10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion XVI
CCA	H.1, Resources
INPO aspect	LA.1
'
v • d • e

Finding - Diablo Canyon - IR 05000275/2018003

1(2)2(0)3(2)4(0)5(0)6(0)7(0)8(6)10(1)301(0)401(0)403(0)404(3)

IR 05000275/2018003: 1 2

Finding List (Diablo Canyon) @ 2018Q3

CCA Matrix: 2018Q3

	Q	CCA	Title
05000323/FIN-2018001-02	2018Q1		Failure to Follow Operating Experience Procedures Results in Inadequate Screen of Operating Experience Report
05000323/FIN-2018001-01	2018Q1		Improper Troubleshooting Results in Reactor Trip Signal and Loss of Source Range Nuclear Instrument Power
05000275/FIN-2018008-02	2018Q2		Failure to Identify Diesel Generator Air Inlet Boot Seal Critical Characteristics
05000275/FIN-2018008-03	2018Q2	H.14	Failure to Promptly Identify and Correct Emergency Diesel Generator 1-1 Cardox System Inoperability
05000275/FIN-2018008-01	2018Q2		Emergency Diesel Generator Mission Time for Operability Evaluations
05000275/FIN-2018010-01	2018Q2		Failure to install conduit to environmentally qualified solenoid valves in a manner to prevent moisture intrusion and accumulation within the solenoid enclosure
05000275/FIN-2018008-05	2018Q2		Minor Violation
05000275/FIN-2018008-06	2018Q2		Minor Violation
05000275/FIN-2018003-01	2018Q3	P.2	Multiple Examples of Scaffolding in Place Greater Than 90 Days Without Required Evaluation
05000275/FIN-2018003-02	2018Q3	H.1	4 kV Vital Switchgear Room Ventilation Degraded or Non-Conforming Condition and Associated Compensatory Measure Not Corrected in a Timely Manner
05000275/FIN-2018404-01	2018Q3	H.13	Security

Self-Identified List (Diablo Canyon)

	Q	Title
05000275/FIN-2018008-04	2018Q2	Licensee-Identified Violation
05000275/FIN-2018404-02	2018Q3	Licensee-Identified Violation
05000275/FIN-2018404-03	2018Q3	Licensee-Identified Violation

[Diablo Canyon Findings full list]

05000275/FIN-2018003-02

Navigation menu

Search