05000458/FIN-2010005-01

Finding

Title

Failure to Develop a Preventive Maintenance Schedule to Specify Inspection or Replacement of the O-Ring in the High Pressure Core Spray Lower Motor Bearing Drain Plug

Description

The inspectors reviewed a self-revealing noncited violation of Technical Specification 5.4.1 for the licensees failure to determine the appropriate preventive maintenance strategy and task frequency for the o-ring in the high pressure core spray lower motor bearing drain plug. As immediate correction action, the licensee replaced the o-ring. At the conclusion of the inspection, the licensee was in the process of determining the appropriate replacement frequency. The licensee entered this issue into their corrective action system as Condition Report CR-RBS-2010-05766. This finding was more than minor because, if left uncorrected, it had the potential to lead to a more significant safety concern, in that if the licensee did not develop a preventive maintenance schedule for periodically replacing the subject o-ring, degradation of that o-ring due to aging could allow a leak that would drain oil from the lower motor bearing and thus render the high pressure core spray pump inoperable. As described in Inspection Manual 0609 Appendix A, a Phase 2 analysis using the presolved worksheet determined that this finding had very low (Green) risk significance. This finding has a crosscutting aspect in the operating experience component of the problem identification & resolution area because the licensee did not systematically collect, evaluate, and communicate to affected internal stakeholders in a timely manner relevant internal and external operating experience.

01
Site:	River Bend
Report	IR 05000458/2010005 Section 1R19
Date counted	Dec 31, 2010 (2010Q4)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	Self-revealing
Inspection Procedure:	IP 71111.19
Inspectors (proximate)	B Correll N Greene P Prescott L Carson D Jones A Barrett T Burns R Hagar G Larkin V Gaddy R Latta
CCA	P.5, Operating Experience
INPO aspect	CL.1
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v • d • e

Finding - River Bend - IR 05000458/2010005

1(0)2(3)3(4)4(7)5(7)6(4)201(1)301(0)302(0)402(0)403(0)404(0)405(0)501(0)31(0)

IR 05000458/2010005: 1 2 3 4 5 6 7

Finding List (River Bend) @ 2010Q4

CCA Matrix: 2010Q4

	Q	CCA	Title
05000458/FIN-2010002-03	2010Q1	H.2(a) H.6	Failure to Adequately Verify a Suitable Replacement Part Essential for Emergency Diesel Generator Operation
05000458/FIN-2010002-02	2010Q1		Failure to Verify Control Building Chiller Operability During Low Service Water Temperatures
05000458/FIN-2010002-01	2010Q1	H.5	Failure to Evaluate a Revised Equipment Tag Out
05000458/FIN-2010006-01	2010Q2	H.4 H.5	Failure to Ensure at Least One Train of Equipment Necessary to Achieve Hot Shutdown Conditions is Free of Fire Damage
05000458/FIN-2010201-01	2010Q2	H.7	Security
05000458/FIN-2010003-03	2010Q2	H.11 H.12	Failure to Follow Radiation Work Permit Instructions
05000458/FIN-2010003-02	2010Q2		Inadequate Procedure Results in Loss of Offsite Power to a 4160 Vac Safety Bus
05000458/FIN-2010003-01	2010Q2		Inadequate Risk Assessment for High Pressure Core Spray Pump Room Unit Cooler Maintenance
05000458/FIN-2010006-04	2010Q2		Failure to Implement and Maintain in Effect all Provisions of the Approved Fire Protection Program
05000458/FIN-2010006-02	2010Q2	H.7	Failure to Ensure Alternative Shutdown Procedure could be Implemented as Written
05000458/FIN-2010006-03	2010Q2		Failure to Implement and Maintain in Effect all Provisions of the Approved Fire Protection Program
05000458/FIN-2010004-04	2010Q3	H.14	Failure to Maintain Licensed Operator Examination Integrity
05000458/FIN-2010004-05	2010Q3		Inadequate High Pressure Core Spray Pump Room Cooler Bearing Maintenance
05000458/FIN-2010004-06	2010Q3		Inadequate Maintenance Results in Unplanned Opening of Main Turbine Bypass Valve
05000458/FIN-2010004-03	2010Q3		Use of a decommissioning funding mechanism that did not meet the requirements of 10 CFR 50.75(e)(1)(v)
05000458/FIN-2010004-02	2010Q3		Failure to provide complete and accurate information by failing to disclose its reliance on a contract in the March 2009 funds status report (10 CFR 50.75(f)(1) and 10 CFR 50.9)
05000458/FIN-2010004-01	2010Q3		Failure to provide adequate decommissioning funding assurance from Dec. 31, 2008 through the present (10 CFR 50.75(b))
05000458/FIN-2010005-02	2010Q4	H.7	Two Examples of Completing Maintenance that Affected the Performance of Safety-Related Equipment but Was Not Properly Preplanned
05000458/FIN-2010005-05	2010Q4	H.12	Failure to Plug a Main Condenser Tube in Accordance with an Approved Work Order
05000458/FIN-2010005-03	2010Q4	H.13	Failure to Perform Required Quality Control Inspections
05000458/FIN-2010005-04	2010Q4		Failure to Implement the Experience and Qualification Requirements of the Quality Assurance Program
05000458/FIN-2010005-01	2010Q4	P.5	Failure to Develop a Preventive Maintenance Schedule to Specify Inspection or Replacement of the O-Ring in the High Pressure Core Spray Lower Motor Bearing Drain Plug

Self-Identified List (River Bend)

	Q	Title
05000458/FIN-2010003-04	2010Q2	Licensee-Identified Violation
05000458/FIN-2010004-07	2010Q3	Licensee-Identified Violation
05000458/FIN-2010005-06	2010Q4	Licensee-Identified Violation
05000458/FIN-2010005-07	2010Q4	Licensee-Identified Violation

[River Bend Findings full list]

05000458/FIN-2010005-01

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