05000387/FIN-2016004-02

Finding

Title

Failure to Promptly Correct a Condition Adverse to Quality with LPCI Swing Bus Automatic Transfer Switches

Description

Green. A finding of very low safety significance (Green) and associated NCV of Title 10 Code of Federal Regulations (CFR) 50, Appendix B, Criterion XVI, Corrective Action, was self-revealed when Susquehanna failed to assure that conditions adverse to quality were promptly identified and corrected on two separate occasions. Both examples resulted in the failures of safety-related automatic transfer switches (ATSs) associated with the low pressure coolant injection (LPCI) swing buses. Corrective actions included enhancing the work instructions for all applicable ATSs based off original equipment manufacturer (OEM) input and scheduling the enhanced work instructions to be performed on the four swing bus ATSs during their next scheduled bus outages. Inspectors determined that the finding was more than minor because it was associated with the Equipment Performance attribute of the Reactor Safety Mitigating Systems cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). In both examples, the failure to correct conditions adverse to quality resulted in the loss of power to the LPCI swing bus and inoperability of the respective division of LPCI. In accordance with IMC 0609.04, Initial Characterization of Findings, dated June 19, 2012, inspectors and Exhibit 2 of IMC 0609, Appendix A, The SDP for Findings At-Power, dated June 19, 2012, inspectors determined that the finding was of very low safety significance (Green). Specifically, though a single train was inoperable for greater than its technical specification (TS) allowed outage time, in consultation with regional senior reactor analysts, inspectors determined it did not represent an actual loss of function. The finding is related to the cross-cutting area of Problem Identification and Resolution, Evaluation, because Susquehanna did not thoroughly evaluate issues to ensure that resolutions address causes and extent of conditions commensurate with their safety significance. Specifically, Susquehanna either failed to evaluate deficiencies encountered during maintenance or failed to ensure that corrective actions aligned with and corrected the identified causes. [P.2]

02
Site:	Susquehanna
Report	IR 05000387/2016004 Section 1R12
Date counted	Dec 31, 2016 (2016Q4)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	Self-revealing
Inspection Procedure:	IP 71111.12
Inspectors (proximate)	B Smith D Schroeder E Gray J Deboer J Furia J Greives P Ott S Anderson T Daun
Violation of:	10 CFR 50 Appendix B Criterion XVI
CCA	P.2, Evaluation
INPO aspect	PI.2
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v • d • e

Finding - Susquehanna - IR 05000387/2016004

1(5)2(7)3(2)4(5)5(0)6(0)7(2)8(4)301(0)403(0)406(1)502(0)502(0)

IR 05000387/2016004: 1 2 4 5 3

Finding List (Susquehanna) @ 2016Q4

CCA Matrix: 2016Q4

	Q	CCA	Title
05000387/FIN-2016001-03	2016Q1	H.5	Failure to Correct Fatigue Related Cracking of the B RRP Lower Seal Cavity Vent Line
05000388/FIN-2016001-01	2016Q1	H.5	Failure to Assess and Manage Risk of Maintenance Activities for a SLC System Flow Surveillance
05000387/FIN-2016001-02	2016Q1		Failure to Report Loss of Safety Function as Required by 10 CFR 50.73(a)(2)(v)
05000387/FIN-2016002-06	2016Q2	H.4	Entry into a Locked High Radiation Area without Radiological Briefing
05000387/FIN-2016002-05	2016Q2	P.3	Entry into a High Radiation Area without Radiological Briefing
05000387/FIN-2016002-04	2016Q2	P.1	Failure to Critique an Incorrect PAR Notification
05000387/FIN-2016002-03	2016Q2	H.13	Failure of B EDG to Reach Rated Frequency within 10 Seconds
05000387/FIN-2016002-02	2016Q2	P.2	Failure to Promptly Correct a Condition Adverse to Quality with A EDG MOC Switch
05000387/FIN-2016002-01	2016Q2	H.14	Failure to Promptly Identify a Condition Adverse to Quality Associated with Primary Containment Isolation Valves
05000388/FIN-2016002-07	2016Q2	H.8	HPCI Overridden Prior to Manual Reactor Scram
05000387/FIN-2016008-01	2016Q3	H.4	Failure to Write a Condition Report for Degraded Conditions Which Challenged Operability of Safety Related Equipment
05000387/FIN-2016008-02	2016Q3	H.8	Failure to Implement and Maintain Quality Procedure Results in Control Room Chiller Inoperability
05000387/FIN-2016008-04	2016Q3		Failure to Promptly Identify and Correct a Condition Adverse to Quality on Vital 480 VAC MCCs
05000388/FIN-2016003-01	2016Q3	H.5	Inadequate Work Instructions for Breaching Internal Flood Barrier
05000387/FIN-2016003-02	2016Q3	H.12	Risk Management Actions Not Adequately Implemented
05000387/FIN-2016406-01	2016Q3	P.2	Security
05000388/FIN-2016008-03	2016Q3	P.3	Failure to Implement or Develop Timely Interim or Final Corrective Actions for a Degraded Condition
05000387/FIN-2016004-05	2016Q4		LERs Associated with Reactor Coolant Pressure Boundary Leakage
05000387/FIN-2016004-04	2016Q4	H.5	Auxiliary Bus Load Shed when a Daisy Chained Neutral was Interrupted during Maintenance
05000388/FIN-2016004-03	2016Q4	H.12	Refuel Floor Radiation Monitor Inoperable Due to being Improperly Calibrated
05000387/FIN-2016004-02	2016Q4	P.2	Failure to Promptly Correct a Condition Adverse to Quality with LPCI Swing Bus Automatic Transfer Switches
05000387/FIN-2016004-01	2016Q4	H.7	Failure Rates Exceed (20%) Twenty Percent for Biennial Requalification Exam
05000387/FIN-2016007-01	2016Q4		Failure to Specify and Maintain Safety-Related Quality Standards and Materials Essential for Reactor Core Isolation Cooling

Self-Identified List (Susquehanna)

	Q	Title
05000387/FIN-2016001-04	2016Q1	Licensee-Identified Violation
05000388/FIN-2016001-05	2016Q1	Licensee-Identified Violation
05000387/FIN-2016007-02	2016Q4	Licensee-Identified Violation

[Susquehanna Findings full list]

05000387/FIN-2016004-02

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