05000293/FIN-2015004-04

Finding

Title

Inadequate Design Control of MSIV Nitrogen Supply Line Support leads to Scram

Description

A self-revealing Green NCV of Title 10 of the Code of Federal Regulations (10 CFR) 50, Appendix B, Criterion III, Design Control, was identified because Entergy did not use the correct work planning and design controls to repair the support for the nitrogen supply line for the 1C inboard main steam isolation valve (MSIV). Specifically, inadequate design controls led to a failed horizontal unistrut support for the nitrogen supply line to the 1C MSIV, resulting in the header resting on the main steam line. This caused vibration-induced cyclic failure of the nitrogen supply line, closure of 1C MSIV, and a plant scram. The damaged line was modified and repaired using an additional unistrut for support as determined by the engineering change process. Entergy entered the issue into the corrective action program (CAP) under condition report (CR) 2015- 07285. This finding is more than minor because it is associated with the Initiating Events cornerstone attribute of equipment performance and adversely affected the cornerstone objective of limiting the likelihood of events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Specifically, the failure of the pneumatic supply header support resulted in a plant scram due to the vibration induced cyclic failure of the nitrogen supply line and subsequent closure of 1C MSIV. In accordance with IMC 0609.04 and Exhibit 1 of IMC 0609, Appendix A, the inspectors determined that this finding was of very low safety significance (Green) because the finding did not involve the complete or partial loss of a support system that contributes to the likelihood of, or cause, an initiating event and affect mitigation equipment. The inspectors determined this finding does not have a cross-cutting aspect because the performance deficiency occurred in 2001 and is not indicative of current performance.

04
Site:	Pilgrim
Report	IR 05000293/2015004 Section 4OA3
Date counted	Dec 31, 2015 (2015Q4)
Type:	NCV: Green
cornerstone	Initiating Events
Identified by:	Self-revealing
Inspection Procedure:	IP 71153
Inspectors (proximate)	A Allen A Burritt B Dionne B Scrabeck E Carfang J Deboer J Pfingstein P Presby T Dunn T Fish T Hedigan S Elkhiamy
Violation of:	10 CFR 50 Appendix B Criterion III, Design Control
INPO aspect
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v • d • e

Finding - Pilgrim - IR 05000293/2015004

1(1)2(5)3(5)4(4)5(0)6(0)7(8)8(2)9(0)10(4)11(0)403(5)404(5)

IR 05000293/2015004: 1 2 3 4

Finding List (Pilgrim) @ 2015Q4

CCA Matrix: 2015Q4

	Q	CCA	Title
05000293/FIN-2015007-05	2015Q1	P.1	Failure to Identify Condition Adverse to Quality Associated with CS Discharge Header Voiding
05000293/FIN-2015007-02	2015Q1	P.2	Failure to Identify, Evaluate, and Correct A SRV Failure to Open Upon Manual Actuation
05000293/FIN-2015007-07	2015Q1		Failure to Report a Major Loss of Emergency Assessment Capability
05000293/FIN-2015403-02	2015Q1		Security
05000293/FIN-2015403-03	2015Q1		Security
05000293/FIN-2015403-04	2015Q1		Security
05000293/FIN-2015403-05	2015Q1		Security
05000293/FIN-2015007-08	2015Q1	H.6	Inadequate Testing of the Diesel-Driven Air Compressor
05000293/FIN-2015007-06	2015Q1	H.7	Failure to Implement Compensatory Measures for Out-of-Service EAL Instrumentation
05000293/FIN-2015007-04	2015Q1	H.8	Failure to Follow RCIC System Manual Restart Procedure
05000293/FIN-2015007-03	2015Q1	H.1	Inadequate Loss of Instrument Air Abnormal Operating Procedure
05000293/FIN-2015007-01	2015Q1	H.14	Inadequate Past Operability Assessment of C Safety Relief Valve
05000293/FIN-2015001-01	2015Q1	P.1	Failure to Perform Testing of Safety Related Undervoltage Alarm Relays
05000293/FIN-2015403-01	2015Q1		Security
05000293/FIN-2015002-04	2015Q2	P.1	Failure to Properly Ship Category 2 Radioactive Material Quantity of Concern
05000293/FIN-2015002-03	2015Q2	P.3	Failure to Conduct Operations to Minimize the Introduction of Residual Radioactivity to the Site
05000293/FIN-2015002-02	2015Q2	H.14	Inadequate Operability Determination for the B EDG Results in TS Violation
05000293/FIN-2015002-05	2015Q2	H.1	Failure to Submit an LER
05000293/FIN-2015002-01	2015Q2	P.2	Ineffective Corrective Actions leads to Loss of Decay Heat Removal
05000293/FIN-2015003-05	2015Q3	H.8	Failure to Comply with RWP Instructions to Contact RP Prior to Condenser Expansion Joint Gasket Removal
05000293/FIN-2015010-04	2015Q3		Security
05000293/FIN-2015010-01	2015Q3	H.6	Inadequate Procedures for Placing Main Turbine in Service
05000293/FIN-2015010-02	2015Q3	P.3	Untimely Actions to Restore Station Meteorological Towers
05000293/FIN-2015010-03	2015Q3	P.1	Inadequate Guidance and Invalid Compensatory Measures for Out-of-Service EAL Instrumentation
05000293/FIN-2015003-01	2015Q3	P.2	Main Control Room Annunciators 10 CFR 50.65(a)(2) Not Met
05000293/FIN-2015003-02	2015Q3	H.14	Inadequate EDG Common Cause Determinations Result in TS Violation
05000293/FIN-2015003-03	2015Q3	H.12	Inadequate Operability Assessment of the Shutdown Transformer
05000293/FIN-2015003-04	2015Q3		Failure to Provide 10 CFR 50.59 Evaluation Associated with Offsite Power Alignment
05000293/FIN-2015004-04	2015Q4		Inadequate Design Control of MSIV Nitrogen Supply Line Support leads to Scram
05000293/FIN-2016010-02	2015Q4		Falsification of hourly fire watch logs
05000293/FIN-2016010-01	2015Q4		Failure to perform hourly fire watches
05000293/FIN-2015404-01	2015Q4	H.12	Security
05000293/FIN-2015004-03	2015Q4	H.8	Failure to Identify the Cause of a Significant Condition Adverse to Quality
05000293/FIN-2015004-02	2015Q4	P.3	Failure to Properly Implement Procedure Changes in accordance with TS 5.4.1a
05000293/FIN-2015004-01	2015Q4	H.8	Inadequate Implementation of Corrective Action following Winter Storm Juno
05000293/FIN-2015008-01	2015Q4	P.2	Failure to Analyze Reactor Recirculation System Motor Operated Valves for the Post-fire Cold Shutdown Function
05000293/FIN-2015404-05	2015Q4		Security
05000293/FIN-2015404-04	2015Q4	P.3	Security
05000293/FIN-2015404-03	2015Q4	H.5	Security
05000293/FIN-2015404-02	2015Q4	H.1	Security

Self-Identified List (Pilgrim)

	Q	Title
05000293/FIN-2015008-02	2015Q4	Licensee-Identified Violation

[Pilgrim Findings full list]

05000293/FIN-2015004-04

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