05000482/FIN-2011004-01

Finding

Title

Switchyard Component Failures Cause Loss of Ring Bus and Loss of Offsite Power

Description

The inspectors identified a finding involving degraded switchyard equipment that caused a loss of offsite power. On August 19, 2009, carrier system signal failures allowed a lightning strike to cause a loss of all three 345 kV lines. This issue is captured in the corrective action program as Condition Report 19245. Wolf Creek and its owner companies have upgraded all capacitive coupled voltage transformers, added fault data recorders, added enhanced line checking procedures with the grid operator, regrounded all three 345 kV lines, and planned to add an offsite power technical requirements manual limiting condition of operation per Condition Report 43244. The issue is more than minor because it impacted the protection against external factors attribute of the Initiating Events Cornerstone and affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Using Inspection Manual Chapter 0609.04, inspectors screened the finding to Phase 3 because it caused both a reactor trip and loss of mitigation equipment or functions to not be available. The senior reactor analyst calculated that the increase in core damage frequency was 2.6 x 10-7, which was of very low safety significance (Green). The inspectors determined that no crosscutting aspects applied because this finding is not indicative of current licensee performance

01
Site:	Wolf Creek
Report	IR 05000482/2011004 Section 1R04
Date counted	Sep 30, 2011 (2011Q3)
Type:	Finding: Green
cornerstone	Initiating Events
Identified by:	NRC identified
Inspection Procedure:	IP 71111.04
Inspectors (proximate)	C Peabody G Miller J Bashore L Carson L Willoughby N Makris S Alferink C Long
INPO aspect
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v • d • e

Finding - Wolf Creek - IR 05000482/2011004

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 05000482/2011004: 1 2 3 4 5 6 7 8 9

Finding List (Wolf Creek) @ 2011Q3

CCA Matrix: 2011Q3

	Q	CCA	Title
05000482/FIN-2010007-04	2010Q4		Emergency Diesel Generator Specified Rating did not Address Engine Operation at Design Basis Extreme Meteorological Temperature Conditions
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-2010005-08	2010Q4	P.5	Inadequate Procedures for Establishing Feedwater Preheat
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-2010008-01	2010Q4	H.14	Failure to Promptly Identify and Correct a Condition Adverse to Quality
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-2011002-10	2011Q1	H.13	Repetitive Failure to Enter Technical Specifications for Auxiliary Feedwater Suction Valve Testing
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-2011002-09	2011Q1	H.5	Inadequate Clearance Order Disables Power Operated Relief Valve Low temperature Overpressure Function
05000482/FIN-2011002-11	2011Q1	H.4 H.5	Failure to Follow Radiation Work Permit Instructions
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-2011003-01	2011Q2	P.3	No Procedure for Debris in Transformed and Tank Yards Prior to Severe Weather
05000482/FIN-2011003-10	2011Q2	P.2	Failure to Analyze for Vortexing in Containment Spray Additive Tank
05000482/FIN-2011003-09	2011Q2	P.3	Inadequate Fire Watch Defeats Halon Fire Suppression in Vital Switchgear Rooms During Fire
05000482/FIN-2011003-08	2011Q2	H.7	Failure to Maintain Reactor Coolant System Pressure Below Relief Valve Setpoint
05000482/FIN-2011003-07	2011Q2	P.2	Failure to Correct Procedure for Opening Main Steam Isolation Valves
05000482/FIN-2011003-06	2011Q2	P.3	Inadequate Acceptance Criteria for Postmaintenance Testing of the Startup Feedwater Pump
05000482/FIN-2011003-05	2011Q2	H.9	Failure to Assure Configuration Control of Safety-Related Systems
05000482/FIN-2011003-04	2011Q2	H.7	Failure to Assure Separation of Stainless Steel and Carbon Steel Grinding and Cutting Equipment
05000482/FIN-2011003-03	2011Q2	H.9	Failure to Assure Fillet Weld Met Size Requirements on Train B Charging Header Vent Line
05000482/FIN-2011004-05	2011Q3	H.14	Failure to Maintain Steam Generator Level Above Lo Lo Level Setpoint
05000482/FIN-2011004-04	2011Q3		Excessive Oil Contamination for Turbine-Driven Auxiliary Feedwater Pump
05000482/FIN-2011004-03	2011Q3		Failure to Follow ASME Code Case OMN-1 for Butterfly Valves
05000482/FIN-2011004-02	2011Q3	H.7	Technical Support Center External Door Propped Open without Impairment
05000482/FIN-2011004-01	2011Q3		Switchyard Component Failures Cause Loss of Ring Bus and Loss of Offsite Power

Self-Identified List (Wolf Creek)

	Q	Title
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
05000482/FIN-2011004-06	2011Q3	Licensee-Identified Violation
05000482/FIN-2011004-07	2011Q3	Licensee-Identified Violation
05000482/FIN-2011004-08	2011Q3	Licensee-Identified Violation
05000482/FIN-2011004-09	2011Q3	Licensee-Identified Violation

[Wolf Creek Findings full list]

05000482/FIN-2011004-01

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