05000275/FIN-2008004-04

Finding

Title

Description

On August 17, 2008, the inspectors responded to a declaration of a Notice of Unusual Event by PG&E following a fire in the Unit 2 main transformer. The inspectors reviewed operator actions taken in accordance with licensee procedures and reviewed unit and system indications to verify that actions and system responses were as expected. The inspectors were unable to complete a review of this event because the root cause investigation team had not completed its investigation. Therefore, an unresolved item will be opened and is planned to be closed in the fourth quarter of 2008. The inspectors will assess the details of review and adequacy of the root cause and any proposed corrective actions as part of the closeout of the unresolved item

04
Site:	Diablo Canyon
Report	IR 05000275/2008004 Section 4OA3
Date counted	Sep 30, 2008 (2008Q3)
Type:	URI:
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71153
Inspectors (proximate)	L Ricketson G Guerra M Brown M Peck P Elkmann V Gaddy M Runyan R Kellar A Fairbanksm Brownm Peck P Elkmann L Ellershaw S Graves J Adams
CCA	H.8, Procedure Adherence
INPO aspect	WP.4
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v • d • e

Finding - Diablo Canyon - IR 05000275/2008004

1(0)2(3)3(4)4(4)5(4)7(0)8(2)9(1)301(0)401(0)402(0)501(0)6(0)31(0)

IR 05000275/2008004: 1 2 3 4

Finding List (Diablo Canyon) @ 2008Q3

CCA Matrix: 2008Q3

	Q	CCA	Title
05000275/FIN-2007005-02	2007Q4	P.2	Inadequate 50.59 Evaluation for Unit 1 Containment Sump Modification
05000275/FIN-2008002-01	2008Q1	P.1 P.1(a)	Failure to Maintain the Integrity of an Auxiliary Building Fire Door
05000275/FIN-2008002-03	2008Q1	P.3	Failure to Follow Procedures, Per Technical Specification 5.4.1
05000275/FIN-2008002-02	2008Q1	H.8	Failure to Demonstrate That the Unit 2 Containment Atmosphere Particulate Radioactivity Monitor Performance Was Being Effectively Controlled Per 10 CFR 50.65(A)(2)
05000275/FIN-2008003-01	2008Q2	P.2	Failure to Scope Spings Into Maintenance Rule
05000275/FIN-2008003-03	2008Q2	P.5 P.2(a)	Inadequate Emergency Diesel Generator Snubber Valve Receipt Inspection
05000275/FIN-2008003-02	2008Q2	H.14	Failure to Follow Operability Procedure
05000275/FIN-2008004-03	2008Q3	P.2	Inadequate Operability Evaluation of Reactor Coolant Leakage Detection System
05000275/FIN-2008004-04	2008Q3	H.8	Unit 2 Main Transformer Fire
05000275/FIN-2008004-01	2008Q3	H.11 H.12	Inadequate Procedure Resulting in Inoperable Auxiliary Building Ventilation System
05000275/FIN-2008004-02	2008Q3	H.13	Failure to Perform a Safety Assessment for Following Discovery of Explosive Gas in the Auxiliary and Containment Buildings

Self-Identified List (Diablo Canyon)

	Q	Title
05000275/FIN-2008003-04	2008Q2	Licensee-Identified Violation

[Diablo Canyon Findings full list]

05000275/FIN-2008004-04

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