05000313/FIN-2016004-01

Finding

Title

Failure to Pre-plan Walkdown to Avoid Impacting Safety Bus

Description

Green. The inspectors documented a self-revealed finding and associated non-cited violation of Unit 1 Technical Specification 5.4.1.a, for the failure to properly pre-plan and perform a pre-modification walkdown in the Unit 1 train A safety-related switchgear room so that the walkdown would not adversely affect the performance of train. As a result, licensee personnel inadvertently de-energized the A3 switchgear and associated ac buses, which resulted in the loss of one train of spent fuel pool cooling. Operators restored spent fuel pool cooling, the licensee evaluated the human error and performed a training stand-down to ensure pre-job walkdowns did not impact plant equipment. The licensee entered this issue into the corrective action program as Condition Report CR-ANO-1-2016-04356. The failure to perform a plant walkdown in a manner that did not impact safety-related switchgear is a performance deficiency. The performance deficiency is more than minor because it adversely affected the human performance attribute of the barrier integrity cornerstone and adversely affected the cornerstone objective to provide reasonable assurance that physical design barriers protect the public from radionuclide releases caused by accidents or events. Specifically, de-energizing the safety-related switchgear resulted in the loss of one train of spent fuel pool cooling and an increase in risk level from Green to Yellow. The inspectors evaluated the finding with NRC Manual Chapter 0609, Appendix A, The Significance Determination Process (SDP) for Findings At-Power, dated June 19, 2012, Exhibit 3, Barrier Integrity Screening Questions, because the appendix provides the most applicable guidance, regardless of whether the unit was at-power or shutdown. The inspectors determined that the finding screened as having very low safety significance (Green) because the finding did not cause the spent fuel pool to exceed the maximum analyzed temperature, did not damage fuel cladding, did not result in a loss pool water inventory below the minimum analyzed level, and did not affect the pool neutron absorber or soluble boron concentration. The inspectors determined this finding has a cross-cutting aspect in the human performance area of Avoid Complacency, because the primary cause of the performance deficiency involved the failure to plan for the possibility of mistakes and use appropriate error reduction tools. [H.12]

01
Site:	Arkansas Nuclear
Report	IR 05000313/2016004 Section 1R20
Date counted	Dec 31, 2016 (2016Q4)
Type:	NCV: Green
cornerstone	Barrier Integrity
Identified by:	NRC identified
Inspection Procedure:	IP 71111.2
Inspectors (proximate)	B Correll B Tindell G Pick J Choate J Dixon J Mateychick M Phalen M Tobin N Greene N O'Keefe P Jayroe R Deese S Money M Kirk
Violation of:	Technical Specification - Procedures
CCA	H.12, Avoid Complacency
INPO aspect	QA.4
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v • d • e

Finding - Arkansas Nuclear - IR 05000313/2016004

1(6)2(3)3(1)4(4)5(0)6(0)7(21)8(6)9(4)10(0)11(0)301(0)401(0)402(0)403(0)404(2)405(0)11(1)

IR 05000313/2016004: 1 2 3 4

Finding List (Arkansas Nuclear) @ 2016Q4

CCA Matrix: 2016Q4

	Q	CCA	Title
05000313/FIN-2016007-12	2016Q1	P.1	Failure to Perform Predictive Maintenance on Safety-Related Medium-Voltage Switchgear
05000313/FIN-2016007-17	2016Q1		Determine Impact of Modifying Fire Seals for Flood Protection
05000313/FIN-2016007-03	2016Q1	H.14	Inadequate Operating Experience Evaluations
05000313/FIN-2016007-04	2016Q1	H.14	Inadequate Control of Monitoring for Wall Loss in the Service Water System
05000313/FIN-2016007-06	2016Q1	H.6	Failure to Correct Degraded Unit 2 Train B Emergency Diesel Generator Heat Exchangers Service Water Flow and Degraded Unit 1 Containment Coatings
05000313/FIN-2016007-01	2016Q1	P.3	Failure to Complete Extent of Condition Reviews for the Stator Drop Significant Condition Adverse to Quality Event
05000368/FIN-2016007-08	2016Q1		Inadequate Flow Monitoring of Unit 2 Service Water to Emergency Feedwater Pump Suction Supply
05000368/FIN-2016007-07	2016Q1		Failure to Maintain Service Water Design Cooling to the Unit 2 High Pressure Safety Injection Pump Seal and Bearing Coolers
05000368/FIN-2016007-05	2016Q1		Failure to Include Unit 2 Service Water Pump Supports in the ASME Code Section XI Inservice Inspection Program
05000368/FIN-2016001-03	2016Q1		Blocked Drain Results in Emergency Feedwater Pump Inoperability
05000368/FIN-2016001-02	2016Q1		Failure to Follow Design Control Requirements for Pump Seal Cooler Replacements
05000313/FIN-2016007-02	2016Q1	P.6	Inadequate Effectiveness Reviews for Corrective Actions to Prevent Recurrence
05000313/FIN-2016007-15	2016Q1	P.1	Failure to Maintain Structural Design Clearances inside the Unit 1 and 2 Reactor Containment Buildings
05000313/FIN-2016007-14	2016Q1	H.3	Failure to Properly Implement the Corrective Action Program
05000313/FIN-2016001-01	2016Q1	H.4	Failure to Assess and Manage Hot Work Risk
05000313/FIN-2016007-11	2016Q1	P.5	Pressurizer Block Valve Not Installed in the Qualified Environmental Configuration
05000368/FIN-2016007-10	2016Q1	P.6	Failure to Develop an Operability Decision-Making Issue for Degraded Condition on Safety Injection Tank
05000313/FIN-2016001-05	2016Q1	P.2	Failure to Identify and Repair Intermittent Card Failure Leads to a Reactor Trip
05000313/FIN-2016007-16	2016Q1	H.7	Failure to Properly Calibrate Unit 1 Reactor Building Atmospheric Particulate Radiation Monitor RE-7460
05000313/FIN-2016007-13	2016Q1	H.1	Failure to Update Probabilistic Risk Assessment Model in a Timely Manner Results in Failure to Submit Complete and Accurate Information
05000313/FIN-2016007-09	2016Q1	H.5	Emergency Feedwater Pump Casing Wall Loss Not Monitored
05000368/FIN-2016001-04	2016Q1	H.12	Failure to Inject Service Water with Corrosion Inhibitors during Refueling Outages
05000313/FIN-2016009-01	2016Q2		Inadequate Loop Flow Testing
05000368/FIN-2016009-04	2016Q2		Failure to Adequately Establish Ignition Frequencies for the Risk-Informed Fire Protection Program
05000368/FIN-2016009-03	2016Q2	H.3	Failure to Ensure that the Assumptions in the Engineering Analysis Remain Valid
05000368/FIN-2016009-02	2016Q2		Inadequate Procedure Used as a Compensatory Measure
05000368/FIN-2016002-02	2016Q2		Failure to Clean Main Feedwater Lube Oil Reservoir Leads to Reactor Power Reduction
05000368/FIN-2016002-01	2016Q2	H.5	Failure to Incorporate Vendor Guidance in Work Order
05000313/FIN-2016003-04	2016Q3		EA-16-143, Enforcement Discretion for Tornado-Generated Missile Protection Noncompliances
05000313/FIN-2016004-01	2016Q4	H.12	Failure to Pre-plan Walkdown to Avoid Impacting Safety Bus
05000313/FIN-2016004-02	2016Q4		Failure to Design Pipe Support for Vibration
05000313/FIN-2016008-06	2016Q4	P.1	Readiness to Cope with External Flooding
05000313/FIN-2016404-02	2016Q4	P.3	Security
05000313/FIN-2016404-01	2016Q4	P.2	Security
05000313/FIN-2016008-05	2016Q4		Failure to Ensure Safety Systems Would Survive Sustained Degraded Voltage Conditions
05000313/FIN-2016008-03	2016Q4		Failure to Monitor Startup Transformers 1, 2, and 3 Voltage Regulator/Tap Changer Function
05000313/FIN-2016008-02	2016Q4		Failure to Incorporate NRC Safety Guide 9 Criteria into Surveillance Procedures
05000313/FIN-2016008-04	2016Q4		Failure to Perform an Adequate Emergency Feedwater Pump Suction Transfer Design Calculation or Testing (EA 2017-017)
05000313/FIN-2016008-01	2016Q4	P.2	Failure to Verify the Adequacy of Motor Operated Valve Thermal Overload Devices
05000368/FIN-2016011-01	2016Q4	H.5	Failure to Ensure Adequate Lubication for Emergency Diesel Generator Bearing

Self-Identified List (Arkansas Nuclear)

	Q	Title
05000313/FIN-2016001-06	2016Q1	Licensee-Identified Violation
05000313/FIN-2016007-18	2016Q1	Licensee-Identified Violation
05000313/FIN-2016007-19	2016Q1	Licensee-Identified Violation
05000368/FIN-2016007-20	2016Q1	Licensee-Identified Violation
05000313/FIN-2016007-21	2016Q1	Licensee-Identified Violation
05000368/FIN-2016002-03	2016Q2	Licensee-Identified Violation
05000313/FIN-2016004-03	2016Q4	Licensee-Identified Violation
05000313/FIN-2016004-04	2016Q4	Licensee-Identified Violation

[Arkansas Nuclear Findings full list]

05000313/FIN-2016004-01

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