05000387/FIN-2013004-04

Finding

Title

Procedure Failed to Verify Design Requirements for RHR Suction Piping

Description

The inspectors identified a green, self-revealing, non-cited NCV of 10 CFR 50 Appendix B, Criterion 5, Instructions, Procedures, and Drawings, which states, in part, that procedures shall include appropriate quantitative or qualitative acceptance criteria for determining that important activities have been satisfactorily accomplished. The inspectors determined that PPLs residual heat removal (RHR) shutdown cooling procedure failed to ensure that water properties (pressure and temperature) in the suction piping was controlled to ensure water hammer event would not happen when establishing a low pressure injection standby lineup. As a result, a water hammer occurred in the piping which caused the suction relief valve to fail open. PPLs immediate corrective actions included entering the issue into their CAP as CRs 1746612 and 1754913, replacing the relief valve, walking down the piping and associated supports and communicating to operations personnel to declare RHR inoperable when aligned to shutdown cooling (SDC) while reactor coolant temperature is above 200 degrees Fahrenheit. This finding is more than minor because it is associated with the procedure quality attribute of the Barrier Integrity cornerstone and affected the cornerstone objective to provide reasonable assurance that physical design barriers (containment) protect the public from radionuclide releases caused by accidents or events. Specifically, the water hammer event resulted in a stuck open relief valve on the RHR suction piping whose leak rate exceeded the assumed leakage from engineered safeguard systems in PPLs post-event control room dose calculations. Because conditions for RHR system operation had been established, the team assessed this finding in accordance with the NRC Inspection Manual Chapter (IMC) 0609, Significance Determination Process, Appendix G, Shutdown Operations Significance Determination Process, using Attachment 1, Checklist 5. The finding did not require a quantitative assessment because none of the checksheet guidelines requiring a phase 2 analysis were affected. Therefore, the finding was determined to be of very low safety significance (Green). The finding had a cross cutting aspect in the problem identification and resolution area associated with operating experience because PPL did not implement and institutionalize operating experience through changes to station processes, procedures, equipment, and training programs. Specifically, PPLs review of IN 2010-11 did not ensure the transition of RHR from SDC to LPCI standby was completed successfully by incorporating adequate steps into the operating procedure.

04
Site:	Susquehanna
Report	IR 05000387/2013004 Section 4OA3
Date counted	Sep 30, 2013 (2013Q3)
Type:	NCV: Green
cornerstone	Barrier Integrity
Identified by:	Self-revealing
Inspection Procedure:	IP 71153
Inspectors (proximate)	J Greives A Turilin K Mangan S Kennedy J Laughlin P Finney F Bower E Burket
Violation of:	10 CFR 50 Appendix B Criterion V
CCA	P.5, Operating Experience
INPO aspect	CL.1
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v • d • e

Finding - Susquehanna - IR 05000387/2013004

403(0)14(0)1(0)2(7)3(4)4(4)5(4)6(0)7(0)8(8)9(0)10(1)11(0)12(0)13(2)14(0)301(0)403(1)404(0)501(0)503(0)7(3)9(0)11(1)

IR 05000387/2013004: 1 2 3 4

Finding List (Susquehanna) @ 2013Q3

CCA Matrix: 2013Q3

	Q	CCA	Title
05000387/FIN-2012005-01	2012Q4	P.2	FAILURE TO DEMONSTRATE EFFECTIVE PREVENTIVE MAINTENANCE UNDER 50.65(a)(2)
05000387/FIN-2012005-03	2012Q4	P.1	Failure of FULL-SCALE Drill Critique to Identify an RSPS Weakness
05000387/FIN-2012005-04	2012Q4		Improper Stress Intensification Factor Results in RCS Pressure Boundary Leak
05000387/FIN-2012005-02	2012Q4		Failure to Report COMMON-CAUSE Inoperability of Independent Trains
05000387/FIN-2012005-06	2012Q4		Failure to Make a Timely Report for a Valid Actuation of RPS
05000387/FIN-2012007-01	2012Q4		Adequacy of Secondary Containment and Standby Gas Treatment System Testing
05000387/FIN-2012005-05	2012Q4		Concerns Regarding Ppls Program for Conducting Biennial Medical Examinations for Licensed Operators and Reporting Changes in Medical Conditions
05000388/FIN-2013007-02	2013Q1	H.7	Failure to Establish and Implement Written Procedures for Operating Plant Equipment
05000387/FIN-2013002-05	2013Q1		Inadequate Procedure for Control Room Cooling Fan Train Failure
05000387/FIN-2013002-04	2013Q1	H.10	Inaccurate Uswc PI Data Submittal
05000387/FIN-2013002-03	2013Q1		Inadequate 10 CFR 50.59 Screening of TS Bases Change
05000387/FIN-2013002-02	2013Q1	H.12	Inadequate Restoration from Clearance Order Results in Degradation of Main Condenser Vacuum and Plant Downpower
05000387/FIN-2013002-01	2013Q1	H.2	Cumbustible Storage in Restricted Areas Without Approval
05000388/FIN-2013007-01	2013Q1	H.5	Failure to Maintain Adequate Feedwater Procedures
05000388/FIN-2013007-03	2013Q1	P.1	Failure to Implement the Corrective Action Process
05000387/FIN-2013003-04	2013Q2		Implementation of Enforcement Guidance Memorandum (EGM) 11-003, Revision 1
05000387/FIN-2013403-01	2013Q2	H.14	Security
05000387/FIN-2013013-02	2013Q2		Failure to Follow RCA Egress Requirements
05000387/FIN-2013013-01	2013Q2		Unauthorized Movement of a High Radiation Area Boundary
05000387/FIN-2013008-02	2013Q2	P.2	Failure to Establish and Implement Written Procedures for Operating Plant Equipment Failure to Provide Complete and Accurate Medical Information for Licensed Operator Applications
05000387/FIN-2013008-01	2013Q2	P.2	Failure to Restrict Operators from Performing Licensed Duties with Medically Disqualifying Conditions and Failure to Notify the NRC within 30 Days of Discovering Changes in Medical Conditions
05000387/FIN-2013003-03	2013Q2	P.3	Inadequate Procedure to Control and Monitor RCS Heatup Rate
05000387/FIN-2013003-02	2013Q2	P.3	Unacceptable Preconditioning of RPS and EOC-RPT Time Response Test
05000387/FIN-2013003-01	2013Q2	P.2	Inadequate Operability Assessment of Synchroscope Switch
05000387/FIN-2013010-01	2013Q3		Failure to Verify Operation of Safety-Related 125Vdc Molded Case Circuit Breakers
05000387/FIN-2013004-04	2013Q3	P.5	Procedure Failed to Verify Design Requirements for RHR Suction Piping
05000387/FIN-2013004-03	2013Q3	P.3	Inadequate and Untimely Actions to Address a Failed Instrument Necessary for Diagnosis of Emergency Conditions
05000387/FIN-2013004-02	2013Q3	H.5	Failure to Assess and Manage Risk of Maintenance Activities
05000387/FIN-2013004-01	2013Q3	P.1	Inadequate Procedural Guidance for Maintaining RPV Level During Anticipated Transient Without Scram
05000388/FIN-2013011-01	2013Q3	P.5	Reactor Scram due to Loss of Integrated Control System

Self-Identified List (Susquehanna)

	Q	Title
05000387/FIN-2013002-06	2013Q1	Licensee-Identified Violation
05000387/FIN-2013002-07	2013Q1	Licensee-Identified Violation

[Susquehanna Findings full list]

05000387/FIN-2013004-04

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