05000335/FIN-2009004-01: Difference between revisions

Finding

Title

Seat leakage of Containment Spray Valves 2MV-07-3/4

Description

While reviewing condition report 2007-41688, the inspectors determined that seat leakage past containment spray system isolation valves 2-MV-07-3 and 2-MV-07-4 dates back to 1990. The valves are Pacific 12 inch gate valves with SB-0 Limitorque motor operators. Leakage has been as high as 3.37 gpm measured in 2004. Repairs on the valve seats and wedges have been ineffective. The repair activities have mainly consisted of lapping the valve seating surfaces and performing a satisfactory blue dye check. The valves are not containment isolation valves and require no periodic in-service test. The licensee has repeatedly planned replacement of the valve with an updated flexible wedge style valve during multiple refueling outages. However, as the refueling outages approach, the repair is cancelled due to scheduling conflicts or to further evaluate the condition. This has been noted by the inspectors during the last two refueling outages as the operator work around remains active. The inspectors determined that in 1996, the licensee developed a compensatory measure and procedure change to install a temporary hose from a drain valve downstream of 2-MV-07-3/4 to allow the seat leakage to drain to the floor drain system in the auxiliary building vice leaking into the containment spray system and discharging down into containment during shutdown cooling operations. Essentially, the licensee has created an operator work around that could have an adverse effect on shutdown cooling operations and reactor coolant system inventory while in midloop conditions which requires frequent makeup to the RCS to maintain reactor vessel inventory and adequate net positive suction head (NPSH) on the operating pump. This issue is unresolved pending completion of NRC review and analysis of licensee actions associated with the operator work around and is identified as Unresolved Item (URI) 05000389/2009-004-01, Seat Leakage of Containment Spray Valves 2 MV-07-3 and 2 MV-07-4

01
Site:	Saint Lucie
Report	IR 05000335/2009004 Section 4OA2
Date counted	Sep 30, 2009 (2009Q3)
Type:	URI:
cornerstone	Mitigating Systems
Identified by:	Self-revealing
Inspection Procedure:	IP 71152
Inspectors (proximate)	J Griffis G Kuzo A Vargas-Mendez T Hoeg R Carrion S Sanchez D Rich C Fletchera Vargasj Sowa M Sykes N Smith R Chou S Sanchez T Hoeg T Morrissey T Ross
INPO aspect
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v • d • e

Finding - Saint Lucie - IR 05000335/2009004

2(5)3(3)4(3)5(1)6(6)7(3)301(0)302(0)402(0)403(0)404(1)

IR 05000335/2009004: 1 2 3

Finding List (Saint Lucie) @ 2009Q3

CCA Matrix: 2009Q3

	Q	CCA	Title
05000335/FIN-2008005-02	2008Q4		Failure of the Automatice Diesel Fuel Oil Transfer System Could Potentially Result in the 1A EDTG Being Inoperable
05000335/FIN-2008005-01	2008Q4	H.11 H.12	Unit 1 Loss of Shutdown Cooling
05000335/FIN-2009007-03	2009Q1		Post-Fire Safe Shutdown From Outside the Main Control Room (Alternative Shutdown)
05000335/FIN-2009007-01	2009Q1	H.4 H.5	Failure to Correct Conditions Adverse to Quality
05000335/FIN-2009007-02	2009Q1		Passive Fire Protection
05000389/FIN-2009002-04	2009Q1	H.5	Failure to Implement Adequate Process Controls during Maintenance Activities Resulted in a Manual Reactor Trip
05000335/FIN-2009002-03	2009Q1	H.4 H.5	Failure to Perform an Adequate Post Maintenance Test on the 1A-EDG Fuel Oil Day Tank Low Level Switch
05000335/FIN-2009002-02	2009Q1	P.3	Failure to Take Timely and Effective Corrective Actions for EDG Day Tank Level Switch Failure
05000335/FIN-2009002-01	2009Q1	H.7	Failure to Perform a Required TS Surveillance
05000335/FIN-2009003-03	2009Q2		Failure to Have a Fully Qualified and Active Licensed Operator at the Control Boards During Reactivity Manipulations
05000335/FIN-2009003-02	2009Q2	H.12	Failure to Follow Procedure When Placing Shutdown Cooling In-Service
05000335/FIN-2009003-01	2009Q2	H.5	Inadequate Risk Assessment When Performing Weekly Pump Venting
05000335/FIN-2009004-01	2009Q3		Seat leakage of Containment Spray Valves 2MV-07-3/4
05000335/FIN-2009006-06	2009Q3	H.13	Failure to Identify and Correct a Condition Adverse to Quality such that Non-Safety Related system Could Cause a Common Mode Failure of Both Trains of a Safety-Related System
05000335/FIN-2009004-02	2009Q3		2B2Reactor Coolant Pump Failed Seal Injection Line
05000335/FIN-2009006-02	2009Q3		Adequacy of Performance Monitoring of the IA Compressor Emergency Cooling System
05000335/FIN-2009006-04	2009Q3		Inadequate Procedure for Restoration of Non-Essential CCW Flow Following a SIAS
05000335/FIN-2009006-05	2009Q3		Failure to Translate Design Basis Specifications to Prevent Single Failure of CCW
05000335/FIN-2009004-03	2009Q3	P.3	Failure to take timely and effective corrective actions to prevent recurrence of EDG Day Tank level switch failures.
05000335/FIN-2009006-01	2009Q3		Failure to Meet the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 Requirements for the Overpressure Protection for the CCW Surge Tank
05000335/FIN-2009006-03	2009Q3	H.7	Failure to Maintain the Safety-Related 125V DC System Design Basis Information Consistent with the Plant Configuration

Self-Identified List (Saint Lucie)

	Q	Title
05000335/FIN-2009002-05	2009Q1	Licensee-Identified Violation

[Saint Lucie Findings full list]

@@ Line 12: / Line 12: @@
 | identified by = Self-Revealing
 | Inspection procedure = IP 71152
-| Inspector = J Griffis, G Kuzo, A Vargas,-Mendez T, Hoeg R, Carrion S, Sanchez D, Rich C, Fletchera Vargas, J Sowa, M Sykes, N Smith, R Chou, S Sanchez, T Hoeg, T Morrissey, T Ross
+| Inspector = J Griffis, G Kuzo, A Vargas-Mendez, T Hoeg, R Carrion, S Sanchez, D Rich, C Fletchera,  Vargasj Sowa, M Sykes, N Smith, R Chou, S Sanchez, T Hoeg, T Morrissey, T Ross
 | CCA = N/A for ROP
 | INPO aspect =

05000335/FIN-2009004-01: Difference between revisions

Latest revision as of 19:37, 20 February 2018

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05000335/FIN-2009004-01: Difference between revisions

Latest revision as of 19:37, 20 February 2018

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