05000346/FIN-2008008-01: Difference between revisions

Finding

Title

Failure to Perform a 10 CFR 50.59 Evaluation for Service Water System Modification

Description

The inspectors identified a Severity Level IV NCV, having very low safety significance, of 10 CFR 50.59, Changes, Tests, and Experiments, for the licensees failure to provide a documented basis for determining that changes to the service water system did not require prior NRC approval. Specifically, the licensee removed flow restricting piping orifices, which created an adverse change to the service water system, because the service water pumps could have insufficient net positive suction head during accident conditions. The licensee revised the service water system operating procedure to ensure that this change did not result in operation of the service water pumps with inadequate net positive suction head and entered this issue into the corrective action program. Because the issue affected the NRCs ability to perform its regulatory function, this issue was evaluated using the traditional enforcement process. The finding was determined to be more than minor because the inspectors could not reasonably determine that the change would not have ultimately required NRC prior approval. The finding was determined to be of very low safety significance because the licensee had not aligned the service water system in a configuration that could have damaged the pumps

01
Site:	Davis Besse
Report	IR 05000346/2008008 Section 1R17
Date counted	Sep 30, 2008 (2008Q3)
Type:	TEV: Severity level IV
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.17
Inspectors (proximate)	M Holmberg C Brown J Bozga D Hills
INPO aspect
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v • d • e

Finding - Davis Besse - IR 05000346/2008008

2(0)1(0)2(5)3(2)4(2)5(2)7(0)8(1)201(1)301(0)402(0)403(0)404(0)501(0)

IR 05000346/2008008: 1

Finding List (Davis Besse) @ 2008Q3

CCA Matrix: 2008Q3

	Q	CCA	Title
05000346/FIN-2007007-05	2007Q4		Concern Regarding SAFETY-RELATED Battery Electrical Isolation
05000346/FIN-2008002-02	2008Q1	H.7	Air Void in Decay Heat/Low Pressure Injection System Due to Inadequate Venting After Maintenance
05000346/FIN-2008002-01	2008Q1	H.2	Failure to Follow Welding Procedures
05000346/FIN-2008002-03	2008Q1	H.4 H.5	Unexpected Reactivity Excursion Due to Unidentified Valve Position During Post Repair Air Pressure Testing
05000346/FIN-2008201-01	2008Q2		Security
05000346/FIN-2008003-01	2008Q2	P.3	CREVS Train 2 Inoperable Due to Loss of Refrigerant Charge
05000346/FIN-2008003-02	2008Q2	H.8	Inadequate Management Oversight During Orange Risk Activity
05000346/FIN-2008008-01	2008Q3		Failure to Perform a 10 CFR 50.59 Evaluation for Service Water System Modification
05000346/FIN-2008004-01	2008Q3		Inoperability of Component Cooling Water Train 1 Ventilation
05000346/FIN-2008004-02	2008Q3	H.2	Failure to Schedule and Perform Procedurally Required POST-MAINTENANCE Test

Self-Identified List (Davis Besse)

	Q	Title
05000346/FIN-2008002-04	2008Q1	Licensee-Identified Violation
05000346/FIN-2008002-05	2008Q1	Licensee-Identified Violation

[Davis Besse Findings full list]

@@ Line 1: / Line 1: @@
 {{finding
 | title = Failure to Perform a 10 CFR 50.59 Evaluation for Service Water System Modification
 | docket = 05000346
 | inspection report = IR 05000346/2008008

05000346/FIN-2008008-01: Difference between revisions

Latest revision as of 23:06, 29 May 2018

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05000346/FIN-2008008-01: Difference between revisions

Latest revision as of 23:06, 29 May 2018

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