05000285/FIN-2015008-02

Finding

Title

Unresolved Item associated with the weld repair of SI-339 vent pipe leakage

Description

On January 23, 2015, during a surveillance test of HPSI Pump 2B, a water leak was discovered at the seal weld between the pump casing and the halfinch ASME Class 2 pipe connected to discharge vent Valve SI-339. The leak rate was approximately 2 drips per minute. The licensee declared the pump inoperable and proceeded to repair the weld. The licensee performed visual and dye penetrant testing to identify a pinhole flaw in the seal weld. The testing did not reveal any flaws on the pump casing or the vent pipe. The pressure boundary for the safety injection system at this location is the threaded pipe connection to the pump casing. The seal weld is applied for leak tightness of the system. The licensee removed half of the seal weld around the pipe and did not observe any additional flaws on the pipe or casing. The licensee did not remove the pipe or perform additional testing on the pipe threads to evaluate if degradation of the threads led to the leakage or if the structural integrity of threaded connection remained intact. The seal weld was repaired and the HPSI pump was restored to operable status following postmaintenance testing. The NRC will review the actions taken by the licensee to determine if the structural integrity of the threaded pipe connection should have been further evaluated through additional testing or analyses. Until completion of this review, this issue will be tracked as unresolved item.

02
Site:	Fort Calhoun
Report	IR 05000285/2015008 Section 1R15
Date counted	Mar 31, 2015 (2015Q1)
Type:	URI:
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.15
Inspectors (proximate)	J Dixon M Schneider P Elkmann R Kellarb Tharakanc Alldredge D Reinert E Ruesch J Braisted L Brandt M Hay M Hayes
INPO aspect
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v • d • e

Finding - Fort Calhoun - IR 05000285/2015008

1(5)2(9)3(2)4(3)5(0)6(0)7(13)8(4)9(2)10(1)11(3)12(3)301(0)401(0)402(0)403(0)404(0)405(0)501(0)

IR 05000285/2015008: 1 2 3 4

Finding List (Fort Calhoun) @ 2015Q1

CCA Matrix: 2015Q1

	Q	CCA	Title
05000285/FIN-2014009-07	2014Q3	P.5	Failure to Accurately Model Flow Path for External Flood Mitigation
05000285/FIN-2014009-01	2014Q3	H.13	Failure to Initiate Condition Reports for Gaps Identified in Resolving NRC Non-Cited Violations
05000285/FIN-2014009-21	2014Q3	P.5	Failure to Take Timely Corrective Actions for an Unsealed Raw Water System Control Panel
05000285/FIN-2014009-20	2014Q3	H.12	Failure to Correct Conditions Adverse to Quality in the Diesel Generator Stating Air System
05000285/FIN-2014009-19	2014Q3	H.1	Failure to Maintain B.5.b Equipment in a State of Readiness to Support Mitigation Strategies
05000285/FIN-2014009-18	2014Q3	H.5	Failure to Complete Corrective Actions in a Timely Manner
05000285/FIN-2014009-17	2014Q3	P.2	Inadequate Corrective Actions to Properly Implement Applicable ASME OM Code Requirements
05000285/FIN-2014009-16	2014Q3	H.9	Failure to Correct Longstanding Software Classification Issues
05000285/FIN-2014009-15	2014Q3	H.6	Failure to Promptly Identify and Correct a Condition Adverse to Quality
05000285/FIN-2014009-14	2014Q3	P.2	Failure to Account for Worst Case Diesel Frequency in Fuel Oil Consumption Calcula
05000285/FIN-2014009-11	2014Q3	H.1	Failure to Ensure Safe Operations at Design Basis Low River Level
05000285/FIN-2014009-10	2014Q3	H.14	Deficient Evaluation of NRC Bulletin 88-04, Strong Pump Weak Pump Due to Failure to Consider the Effect of Auxiliary Feedwater Pumps Discharge Check Valves Leakage
05000285/FIN-2014009-09	2014Q3	P.2	Failure to Incorporate Design Requirements for Switchgear Room Cooling
05000285/FIN-2014009-06	2014Q3	P.2	Failure to Maintain Design Control of Raw Water Strainer Control Panel
05000285/FIN-2014009-05	2014Q3	H.6	Inadequate Design Inputs into Safety Injection Piping Stress Calculation
05000285/FIN-2014009-03	2014Q3	P.2	Failure to Adequately Perform an Operability Evaluation and a 50.59 Evaluation
05000285/FIN-2014009-02	2014Q3	H.14	Multiple Examples of Failure to Evaluate Operability of Degraded or Non-Conforming Condition
05000285/FIN-2014009-12	2014Q3	H.1	Failure to Maintain Effectiveness of an Emergency Plan
05000285/FIN-2014004-01	2014Q3	H.12	Failure to Implement Procedural and alarm setpoint changes in support of an Operability Eval
05000285/FIN-2014004-02	2014Q3	P.4	Failure to Maintain a Testing Program for the Containment Spray System
05000285/FIN-2014004-03	2014Q3		Failure to Verify the Adequacy of the Design of the FO-10 to FO-1 Fuel Oil Transfer System
05000285/FIN-2014009-04	2014Q3		Failure to Perform an Evaluation for a New Operator Manual Action to Refill Component Cooling Water System During Post- Accident Conditions
05000285/FIN-2014009-08	2014Q3		Failure to Report Loss of Environmental Qualification of Safety Related Limit Switches within Required Time Limits
05000285/FIN-2014009-13	2014Q3		Failure to Perform Evaluation for Design Change
05000285/FIN-2013018-03	2014Q4		Failure to Furnish Evidence of Activities Affecting Quality
05000285/FIN-2014005-02	2014Q4	H.5	Failure to determine the availability of local population data for use in estimating changes in the EPZ population
05000285/FIN-2013018-01	2014Q4		Failure to Correctly Translate Design Requirements into Installed Plant Configuration
05000285/FIN-2013018-02	2014Q4	H.2	Use of Non-conservative Values in Design Analyses
05000285/FIN-2013018-04	2014Q4	P.2	Failure to Promptly Identify and Correct Inadequate Internal Flooding Analysis
05000285/FIN-2013018-05	2014Q4	H.14	Use of Non-Conservative Inputs in Thermal Lag Analyse
05000285/FIN-2013018-06	2014Q4	H.14	Failure to Recognize Adverse Design Changes
05000285/FIN-2013018-07	2014Q4	P.3	Failure to Maintain Design Control of the Auxiliary Feedwater
05000285/FIN-2014005-01	2014Q4	P.2	Failure to establish Appropriate Preventive Maintenance and Failure to Identify Raw Water SSC Maintenance Rule Performance Criteria Exceeded and thereby establish Monitoring Requirements for the SSC
05000285/FIN-2015001-03	2015Q1		Required In-Service Testing for Steam Generator Auxiliary Feedwater Inlet Valves
05000285/FIN-2015007-11	2015Q1		Raw Water Strainer Analysis and Commercial Dedication
05000285/FIN-2015007-09	2015Q1		Intake Structure Design Requirements
05000285/FIN-2015008-02	2015Q1		Unresolved Item associated with the weld repair of SI-339 vent pipe leakage
05000285/FIN-2015010-01	2015Q1		Failure to Provide Complete and Accurate Information on Licensed Operator Applications
05000285/FIN-2015008-04	2015Q1		Failure to Make Required Licensee Event Report
05000285/FIN-2015007-12	2015Q1	H.13	Failure to Properly Implement Procedures for Verifying Operator Time Critical Actions
05000285/FIN-2015007-10	2015Q1		Failure to Adequately Account for Raw Water Pump Discharge Check Valve Back Leakage
05000285/FIN-2015007-08	2015Q1	H.6	Failure to Obtain Prior NRC Approval for a Change in Seismic Analysis Damping
05000285/FIN-2015007-07	2015Q1	H.7	Failure to Perform an Adequate Evaluation for the Intake Structure Crane Trolley and Bridge Rail
05000285/FIN-2015007-06	2015Q1	H.14	Failure to Perform an Adequate Auxiliary Feedwater Pump Runout Design Calculation
05000285/FIN-2015007-05	2015Q1		Failure to Perform an Adequate Evaluation for the Auxiliary Building Crane
05000285/FIN-2015007-04	2015Q1		Inadequate Justification for Power Supplies Installed Beyond Vendor Recommended Life
05000285/FIN-2015007-03	2015Q1	P.5	Failure to Account for Elevated Battery Room Temperature Effects on Battery Service Life
05000285/FIN-2015007-02	2015Q1	H.7	Failure to Establish Correct Acceptance Criteria Values for Battery Intercell Resistance Measurements
05000285/FIN-2015007-01	2015Q1		Failure to Perform an Adequate Battery Sizing and Load Profile Calculation
05000285/FIN-2015008-03	2015Q1	H.8	Failure to Promptly Identify and Correct a Condition Adverse to Quality
... further results

Self-Identified List (Fort Calhoun)

	Q	Title
05000285/FIN-2014009-22	2014Q3	Licensee-Identified Violation
05000285/FIN-2014009-23	2014Q3	Licensee-Identified Violation
05000285/FIN-2014009-25	2014Q3	Licensee-Identified Violation
05000285/FIN-2014009-24	2014Q3	Licensee-Identified Violation
05000285/FIN-2015001-04	2015Q1	Licensee-Identified Violation
05000285/FIN-2015001-05	2015Q1	Licensee-Identified Violation
05000285/FIN-2015007-13	2015Q1	Licensee-Identified Violation

[Fort Calhoun Findings full list]

05000285/FIN-2015008-02

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