05000498/FIN-2007007-02: Difference between revisions

Finding

Title

Manual Loads Not Considered for Fuel Oil Storage Tank Sizing Calculation

Description

The team identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, having very low safety significance for the failure to include all potential loads in the standby diesel generator fuel oil sizing calculation. Specifically, the licensee did not account for increased standby diesel generator fuel oil usage resulting from the addition of manual electrical loads during the 7-day mission run time. The licensee entered this finding into their corrective action program as Condition Record 07-15592. The licensee subsequently demonstrated that the spent fuel pool cooling pumps would be the only additional manual loads actually used during the 7 days of operation in the bounding design basis scenario and that there were additional conservative assumptions in the sizing calculation to demonstrate sufficient margin. The finding was determined to be more than minor because it is associated with the Mitigating Systems cornerstone attribute of Design Control. It impacts the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events and prevent undesirable consequences. Using Inspection Manual Chapter 0609, Appendix A, Significance Determination of Reactor Inspection Findings for At-Power Situations, Phase 1 screening, the finding screened as having very low safety significance (Green) because it was a design or qualification deficiency confirmed not to result in loss of operability or functionality.

02
Site:	South Texas
Report	IR 05000498/2007007 Section 1R21
Date counted	Mar 31, 2008 (2008Q1)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.21
Inspectors (proximate)	H Anderson B Henderson S Rutenkroger W Sifre R Bywater J Chiloyan M Chambers G Apger S Makor
INPO aspect
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v • d • e

Finding - South Texas - IR 05000498/2007007

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

IR 05000498/2007007: 1 2 3 4 5 6 7 8

Finding List (South Texas) @ 2008Q1

CCA Matrix: 2008Q1

	Q	CCA	Title
05000498/FIN-2007007-07	2008Q1		Effect of Standby Diesel Generator Technical Specification Voltage Variation on Supplied Equipment
05000498/FIN-2007007-08	2008Q1		Combined Adverse Conditions Not Considered in Fuel Oil Storage Tank Sizing
05000498/FIN-2008006-01	2008Q1	H.14	Failure to Conspicuously Post a Radiation Area
05000498/FIN-2007007-01	2008Q1		Failure to Specify Setpoint Calibration Limits in Relay Setpoint Calculations
05000498/FIN-2007007-02	2008Q1		Manual Loads Not Considered for Fuel Oil Storage Tank Sizing Calculation
05000498/FIN-2007007-03	2008Q1		Failure to Use Correct Design Inputs in Determination of the Weak Link for the Auxiliary Feedwater System Outside Containment Isolation Motor Operated Valves
05000498/FIN-2007007-04	2008Q1		Surveillance Procedure Lacked Check for Timing of Chiller Loading on the Bus
05000498/FIN-2007007-05	2008Q1		Inadequate Test Program for 125V DC Molded Case Circuit Breakers
05000498/FIN-2007007-06	2008Q1		Failure to Incorporate Instrument Uncertainties Into Surveillance Requirements for Technical Specification Limiting Condition for Operation 3.5.2 (Specifically Surveillance Requirement 4.5.2.F)

Self-Identified List (South Texas)

[South Texas Findings full list]

@@ Line 1: / Line 1: @@
 {{finding
 | title = Manual Loads Not Considered for Fuel Oil Storage Tank Sizing Calculation
 | docket = 05000498, 05000499
 | inspection report = IR 05000498/2007007

05000498/FIN-2007007-02: Difference between revisions

Latest revision as of 23:04, 29 May 2018

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05000498/FIN-2007007-02: Difference between revisions

Latest revision as of 23:04, 29 May 2018

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