05000482/FIN-2011003-03

Finding

Title

Failure to Assure Fillet Weld Met Size Requirements on Train B Charging Header Vent Line

Description

The inspectors documented a self-revealing noncited violation of 10 CFR Part 50, Appendix B, Criterion IX, Control of Special Processes. Specifically, in October 2009, welders failed to ensure the fillet weld between the train B charging header and the half coupling used to attach two vent valves met the specified weld requirements. This weld failed in January 2011, rendering the train B charging system inoperable. The licensees extent of condition review identified 12 vent line welds which did not meet ASME code weld size requirements and/or procedural requirements for 2:1 weld taper configuration. Additionally, quality assurance inspectors failed to identify that the 2:1 taper weld requirements specified by procedure, and ASME minimum weld size requirements, were not met in multiple vent line welds. The weld was repaired and built up to the correct 2:1 aspect ratio. This issue was entered into the licensees corrective action program as Condition Reports 32648, 33686, 33689, and 36438. The finding was more than minor because it was associated with the equipment performance attribute of the Initiating Events Cornerstone and adversely affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during power operations. The inspectors performed a Phase 1 screening in accordance with Inspection Manual Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, and determined that the finding was of very low safety significance (Green) because the issue did not result in exceeding the technical specification limit for identified reactor coolant system leakage or affect other mitigating systems resulting in a total loss of their safety function. This finding had a cross-cutting aspect in the area of human performance, resources, because the licensee failed to ensure that personnel, specifically welders and quality assurance inspectors, were adequately trained in the procedural requirements and methods for measuring weld dimensions to assure nuclear safety.

03
Site:	Wolf Creek
Report	IR 05000482/2011003 Section 1R08
Date counted	Jun 30, 2011 (2011Q2)
Type:	NCV: Green
cornerstone	Initiating Events
Identified by:	Self-revealing
Inspection Procedure:	IP 71111.08
Inspectors (proximate)	A Fairbanks C Long C Peabody D Reinert D Strickland G Guerra G Miller G Pick J Drake
CCA	H.9, Training
INPO aspect	CL.4
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v • d • e

Finding - Wolf Creek - IR 05000482/2011003

1(0)2(14)3(12)4(9)5(6)6(2)7(6)8(0)9(2)402(0)403(0)25(0)

IR 05000482/2011003: 1 2 3 4 5 6 7 8 9 10 11 12

Finding List (Wolf Creek) @ 2011Q2

CCA Matrix: 2011Q2

	Q	CCA	Title
05000482/FIN-2010006-01	2010Q3	H.7	Failure to Resolve Degraded Conditions in a Timely Manner
05000482/FIN-2010006-02	2010Q3	P.3	Unqualified Scaffolding Erected Near Safety-Related Equipment
05000482/FIN-2010006-03	2010Q3	P.1 P.1(a)	Failure to Adequately Monitor Control Room Deficiencies
05000482/FIN-2010004-01	2010Q3		Failure to Establish Conditions to Open a Main Steam Isolation Value that Resulted in a Feedwater Isolation
05000482/FIN-2010006-04	2010Q3	H.7	Failure to Update an Operability Evaluation
05000482/FIN-2010006-05	2010Q3	P.2	Failure to Perform Adequate Evaluation for Significant Conditions
05000482/FIN-2010006-07	2010Q3	P.1 P.1(a)	Failure to Determine if a Deficiency Existed in the Ultimate Heat Sink
05000482/FIN-2010006-08	2010Q3	P.2	Notice of Unusual Event Due to Loss of Both Emergency Diesel Generators
05000482/FIN-2010006-09	2010Q3	P.3	Failure to Translate Design Information into a Procedure
05000482/FIN-2010004-02	2010Q3	H.7	Failure to Correct Degraded Vital Switchgear Cooler Wiring
05000482/FIN-2010005-08	2010Q4	P.5	Inadequate Procedures for Establishing Feedwater Preheat
05000482/FIN-2010005-05	2010Q4	P.1	Failure to Identify Boric Acid Leak on Instrument Lines to Reactor Coolant System
05000482/FIN-2010005-06	2010Q4	H.12	Failure to Have Procedures to Prevent Draining Radioactive Systems into Nonradioactive Systems
05000482/FIN-2010005-07	2010Q4	P.1	Failure to Have Adequate Procedures for Meteorological Monitoring
05000482/FIN-2010008-01	2010Q4	H.14	Failure to Promptly Identify and Correct a Condition Adverse to Quality
05000482/FIN-2010005-09	2010Q4	P.5	Inadequate Procedures to Ensure Proper Main Feed Pump Speed During Startup
05000482/FIN-2010007-01	2010Q4		Inadequate Design of Component Cooling Water Safety/Nonsafety Isolation
05000482/FIN-2010007-02	2010Q4	H.7	Failure to Perform Tornado Damper Testing
05000482/FIN-2010007-03	2010Q4		Inadequate Auxiliary Feedwater Pump Suction Line Break Analysis and Design
05000482/FIN-2010007-04	2010Q4		Emergency Diesel Generator Specified Rating did not Address Engine Operation at Design Basis Extreme Meteorological Temperature Conditions
05000482/FIN-2010007-05	2010Q4	H.9	Failure to Translate Design Requirements to Operating Procedures for the Transfer of Residual Heat Removal and Containment Spray Suction to the Containment Recirculation Sumps
05000482/FIN-2010005-01	2010Q4	H.14	Failure to Properly Identify and Evaluate Degraded Piping in the Train A Essential Service Water System
05000482/FIN-2010005-02	2010Q4	H.14	Failure to Account for Water Hammer Stresses in Essential Service Water System Calculations
05000482/FIN-2010005-03	2010Q4	H.7	Failure to Maintain Operator Licensing Examination Integrity
05000482/FIN-2010005-04	2010Q4	P.2	Failure to Evaluate Corrosion Mechanism in Accordance with Code Case N513
05000482/FIN-2010005-10	2010Q4	H.7	Inadequate Procedure for Steam Generator Hi-Hi Turbine Trip
05000482/FIN-2010005-11	2010Q4	H.1	Inadequate Simulation Facility Fidelity
05000482/FIN-2010008-02	2010Q4		Inadequate Procedure for Fill and Vent of the Component Cooling Water System
05000482/FIN-2010008-03	2010Q4	P.2	Failure to Perform an Adequate Operability Evaluation
05000482/FIN-2010008-04	2010Q4	P.2	Failure to Identify and Correct Inadequate RHR Fill and Vent Procedures
05000482/FIN-2011002-09	2011Q1	H.5	Inadequate Clearance Order Disables Power Operated Relief Valve Low temperature Overpressure Function
05000482/FIN-2011006-01	2011Q1	H.9 H.2(b)	Failure to Trend Emergency Diesel Generator Chemistry Parameters Results in an Unplanned Technical Specification Entry
05000482/FIN-2011002-01	2011Q1	H.14	Inadequate Design Control of the Fuel Oil Storage Tank Fill System
05000482/FIN-2011002-02	2011Q1	H.5	Inadequate Clearance Order Isolated Cooling to Inservice Safety-Related Equipment
05000482/FIN-2011002-03	2011Q1	P.2	Failure to Monitor the Performance of Nonsafety-Related Systems and Components Used in the Plant Emergency Operating Procedures under 10 CFR 50.65 Programs
05000482/FIN-2011002-04	2011Q1	P.2	Failure to Follow 10 CFR 50.65 a(2) for Main Control Board Annunciator Power Supply Failures
05000482/FIN-2011002-05	2011Q1		Inadequate Calculation for Vital Switchgear Cooling
05000482/FIN-2011002-06	2011Q1	P.2	Failure to Perform an Operability Determination for Degradation of the Fuel Oil Storage Tank
05000482/FIN-2011002-07	2011Q1	H.4 H.5	Failure to Verify Ultimate Heat Sink Sedimentation Levels within Design Bases
05000482/FIN-2011002-08	2011Q1	P.3	Inadequate Fill and Vent of Component Cooling Water
05000482/FIN-2011002-10	2011Q1	H.13	Repetitive Failure to Enter Technical Specifications for Auxiliary Feedwater Suction Valve Testing
05000482/FIN-2011002-11	2011Q1	H.4 H.5	Failure to Follow Radiation Work Permit Instructions
05000482/FIN-2011003-10	2011Q2	P.2	Failure to Analyze for Vortexing in Containment Spray Additive Tank
05000482/FIN-2011003-01	2011Q2	P.3	No Procedure for Debris in Transformed and Tank Yards Prior to Severe Weather
05000482/FIN-2011003-02	2011Q2	H.12	Failure to Properly Establish Clearance Order Boundary Isolation Resulting in Loss of Component Cooling Water Inventory
05000482/FIN-2011003-03	2011Q2	H.9	Failure to Assure Fillet Weld Met Size Requirements on Train B Charging Header Vent Line
05000482/FIN-2011003-04	2011Q2	H.7	Failure to Assure Separation of Stainless Steel and Carbon Steel Grinding and Cutting Equipment
05000482/FIN-2011003-05	2011Q2	H.9	Failure to Assure Configuration Control of Safety-Related Systems
05000482/FIN-2011003-06	2011Q2	P.3	Inadequate Acceptance Criteria for Postmaintenance Testing of the Startup Feedwater Pump
05000482/FIN-2011003-07	2011Q2	P.2	Failure to Correct Procedure for Opening Main Steam Isolation Valves
... further results

Self-Identified List (Wolf Creek)

	Q	Title
05000482/FIN-2010004-03	2010Q3	Licensee-Identified Violation
05000482/FIN-2011006-02	2011Q1	N/A
05000482/FIN-2011002-12	2011Q1	Licensee-Identified Violation
05000482/FIN-2011002-13	2011Q1	Licensee-Identified Violation
05000482/FIN-2011002-14	2011Q1	Licensee-Identified Violation
05000482/FIN-2011003-11	2011Q2	Licensee-Identified Violation
05000482/FIN-2011003-12	2011Q2	Licensee-Identified Violation

[Wolf Creek Findings full list]

05000482/FIN-2011003-03

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