ML13324A391

Part 21 - Machining Error Identified in Geared Limit Switches

ML13324A391
Person / Time
Site:	Perry
Issue date:	11/08/2013
From:	Mcconkey J Flowserve Corp
To:	Office of Nuclear Reactor Regulation
References
49522
Download: ML13324A391 (5)

Text

-i 11/08/2013 U.S. NuclearRegulatory Commission Operations Center Event Report Pane I Part 21 (PAR) Event# 49522 Rep Org: FLOWSERVE Notification Date / Time: 11/08/2013 16:26 (EST)

Supplier: LIMITORQUE Event Date / Time: 09/04/2013 (EST)

Last Modification: 11/08/2013 Region: 1 Docket #:

City: LYNCHBURG Agreement State: Yes County: License #:

State: VA NRC Notified by: JEFF MCCONKEY Notifications: ALAN BLAMEY R2DO HQ Ops Officer: DONG HWA PARK CHRISTINE LIPA R3DO Emergency Class: NON EMERGENCY PART 21 GROUP EMAIL 10 CFR Section:

21.21 (d)(3)(i) DEFECTS AND NONCOMPLIANCE PART 21 - MACHINING ERROR IDENTIFIED IN GEARED LIMIT SWITCHES The following is a summary of information received from Flowserve via facsimile:

"On September 4, 2013, in-house inspection of Limitorque SMB Geared Limit Switch (GLS) cartridges revealed a machining error in a subcomponent used in the GLS. The deviation was caused by a dimensional error concerning the location of a drilled hole in a drive pinion shaft. This error results in a reduction of gear tooth engagement inside the GLS which could potentially reduce the service life of the GLS causing a loss of function. To date, Limitorque's investigation of this machining error has not shown this deviation to be significant enough to affect the safety related function of the GLS. However, Limitorque has requested all switches certified for nuclear safety related service which were manufactured in the designated time frame be returned for inspection and replacement as needed."

The components were sent to Perry Nuclear Generating Station.

o!

11/08/2013 U.S. NuclearRegulatory Commission OperationsCenter Event Report Page 1 Part 21 (PAR) Event# 49522

.4345229831 04:19:02 p.m. 11-08-2013 1 /3 Flowserve 5114 Woodall Road Lynchburg, VA. 24502 Flowserve To: NRC Operations Center Fax: (301) 816-5151 From: JeffMcConkey Date: 11/8/2013 Re: Pages: 3 including this cover sheet EZ Urgent El For Review 0 Please Comment 0 Please Reply 0 Please Recyde Notes: Limitorque Part 21 Notification Final Report Potential Defect in SMB Geared Limit Switch.

Thank You Jeff McConkey Quality Assurance Manager Flowserve Corporation - FCD Lynchburg 5114 Woodall Road Lynchburg, VA 24506 (office) 434-845-9738 (cell) 434-851-4402 jmcconkey@flowserve.com

4345229831 04:19:33 p.m. 11-08-2013 2/3 FLOWSERVE

• Flow Control Division Limitorque Lntru November 8, 2013 To: U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001 Attention: NRC Operations Center, Fax # 301-816-5151 From: Flowserve Corporation Limitorque 5114 Woodall Road Lynchburg VA 24506

Subject:

Limitorque Part 21 Notification Report Potential Defect in SMB Geared Limit Switch

Description:

On September 4, 2013, in-house inspection of Limitorque SMB Geared Limit Switch (GLS) cartridges revealed a machining error in a subcomponent used in the GLS. The deviation was caused by a dimensional error concerning the location of a drilled hole in a drive pinion shaft. This error results in a reduction of gear tooth engagement inside the GLS which could potentially reduce the service life of the GLS causing a loss of function. To date, Limitorque's investigation of this machining error has not shown this deviation to be significant enough to affect the safety related function of the GLS.

However, Limitorque has requested all switches certified for nuclear safety related service which were manufactured in the designated time frame be returned for inspection and replacement as needed.

Components Affected:

SMB/SB/SBD Geared Limit Switch (GLS) assemblies manufactured between August 12, 2013 and September 4, 2013 were potentially affected.

GLS assemblies which were built and shipped during this time frame are limited to the two orders identified below. The customers listed below have been notified.

Limitorque Order No: 132845.005 Customer: Areva Nuclear Parts Center Customer P.O. #: 1013031247 Identifier: 2-train GLS, Part # 10153 Quantity Affected: 11 Location of Components Qty (8) have been returned to Limitorque.

Qty (3) were shipped to OPG. At Limitorques request, Areva NP contacted OPG and the GLS assemblies have been returned for replacement.

Page 1 of 2

4345229831 04:20:40 p.m. 11-08-2013 3/3 Flow Control Division FLOWSERVE Limitorque Limitorque Order No: 12923 1.001 Customer: Flowserve FCD - Raleigh, NC Customer P.O. #: 201936 Identifier: 2-train GLS Part # 10144 installed in SMB-000 / HBC-0 actuators Quantity Affected: 3 (Actuator Serial #s: 998306, 998307, 998308)

Location of Components Actuators were shipped to FENOC, Perry NGS (Reference Perry P.O. #

454003386). Replacement of the GLS assemblies is in process. The MOVs have not been installed in the plant.

Cause and Corrective Action:

Limitorque QA investigation traced the potentially effected components to a single lot of drive pinions that was placed into Limitorque stock on August 12, 2013. Immediate corrective action involved 100% inspection of all drive pinions in stock. In addition, the drive pinions already installed in GLS assemblies in stock were inspected for the deviation. Limitorque has determined the cause of this machining deviation to be improper use of the drilling operation machining fixture for this component. An improved machining fixture for this subcomponent part has been designed and will be in place by Nov 30, 2013.

Technical questions related to the notification can be addressed to Kyle Ramsey, Chief Mechanical Engineer, Flowserve - Limitorque (kramsey@,lowserve.com)

Submitted By:________________

Jeff McConkey, Quality Assurance Manager, Flowserve - Limitorque 5114 Woodall Rd, Lynchburg VA 434-845-9738 jmcconkey@,Flowserve.com Page 2 of 2