ML12181A143
| ML12181A143 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 06/27/2012 |
| From: | Mcconkey J Flowserve Limitorque Actuators |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 47505 | |
| Download: ML12181A143 (7) | |
Text
0612712012 U.S. NuclearRegulatory Commission Operations Center Event Report Paze I Part 21 (PAR) Event# 47505 Rep Org: FLOWSERVE LIMITORQUE ACTUATORS Notification Date / Time: 12/06/2011 16:43 (EDT)
Supplier: FLOWSERVE LIMITORQUE ACTUATORS Event Date / Time: 12/05/2011 (EST)
Last Modification: 06/27/2012 Region: 1 Docket #:
City: LYNCHBURG Agreement State: Yes County: License #:
State: VA NRC Notified by: JEFF McCONKEY Notifications: CHRISTOPHER CAHILL R1DO HQ Ops Officer: STEVE SANDIN RANDY MUSSER R2DO Emergency Class: NON EMERGENCY RICHARD SKOKOWSKI R3DO 10 CFR Section: NEIL OKEEFE R4DO 21.21 UNSPECIFIED PARAGRAPH PART 21 via email LIMITORQUE PART 21 NOTIFICATION INTERIM REPORT - POTENTIAL DEFECTIVE PART IN SMB-0 HEAVY SPRING PACK The following information was received via fax:
Background:
During in-house production testing of Limitorque SMB-0 actuators, test lab personnel reported an inability to maintain consistent torque output at the various torque switch settings. Investigation revealed that the actuator torque spring pack assembly had lost preload during the test. Component inspection determined that the loss of preload was due to disc springs that had experienced an excessive permanent relaxation of free height during actuator testing.
Components Affected: Only SMB/SB/SBD-0 actuators with heavy spring pack assemblies shipped between September 15, 2011 and November 7, 2011 could possibly be affected. No parts orders for SMB/SB/SBD-0 replacement heavy spring packs were built in this time period.
Potential Impact on Safety Related Operation: A significant loss of preload on the actuator torque spring pack assembly could result in the actuator producing insufficient output torque thereby affecting proper valve function.
Cause and Corrective Action: Communications with the spring manufacturer revealed that Limitorque was shipped a single lot of springs that were not in accordance with our parts requirements. These springs were incorrectly shipped to Limitorque due to a manufacturer backorder on our normally requested product. Vendor controls have been implemented to prevent reoccurrence of this issue. Limitorque has identified the problem springs and purged them from inventory.
On November 14, 2011 Limitorque notified all affected customers who received the actuators which shipped during
06/27/2012 U.S. Nuclear Regulatory Commission Operations Center Event Report Paze 2 Part 21 (PAR) Event# 47505 the time period identified above. The serial numbers and locations of the potentially affected actuators are provided in the table below. Limitorque has requested that the actuator spring packs be returned for detailed inspection and replacement if needed.
After inspection of the spring pack assembly of all actuators listed below, Flowserve-Limitorque will issue a follow-up to this interim report on or before February 3, 2012.
Affected Customers/Locations:
Customer - Velan Valve Corp.
Location of Actuator - Velan Valve, Montreal Limitorque Order No. 110309.001 Quantity - 6 Actuator Serial # 909476-909481 Customer - Velan Valve Corp.
Location of Actuator - Velan Valve, Montreal Limitorque Order No. 115055.001 Quantity - 1 Actuator Serial # 926332 Customer - Weir Valve Corp.
Location of Actuator - Weir Valve, Ipswich, MA Limitorque Order No. 106839.008 Quantity - 4 Actuator Serial # 911621-911624 Customer - Weir Valve Corp.
Location of Actuator - Weir Valve, Ipswich, MA Limitorque Order No. 106839.009 Quantity - 4 Actuator Serial # 911625-911628 Customer - Weir Valve Corp.
Location of Actuator - Weir Valve, Ipswich, MA Limitorque Order No. 106930.012 Quantity - 4 Actuator Serial # 912769-912772 Customer - Areva NP Location of Actuator - Exelon, Braidwood NGS Limitorque Order No. 112724.001 Quantity - 1 Actuator Serial # 917953
- *
- UPDATE FROM JEFF MCCONKEY TO PETE SNYDER ON 6/27/12 AT 1714 EDT ***
The following update was received via fax:
Pursuant to 10 CFR 21.21, Flowserve Corp is providing notification of the identification of a defect. This information was originally reported to the NRC Operations Center on 12/6/2011 (Event # 47505). This document is a follow-up to the interim Part 21 report.
06/27/2012 US. Nuclear Regulatory Commission Operations Center Event Report Page Part 21 (PAR) Event# 47505 Nineteen of the twenty actuators identified in the interim report-as potentially suspect have been returned to Limitorque for inspection of the spring pack. All nineteen of these actuators were returned from two different valve manufacturer's facilities and bad not been shipped to any utilities for installation. Six of the actuators returned from Velan Valve Corporation were found to contain defective springs. The spring packs were replaced and the actuators were returned to Velan Valve. The actuators returned from Weir Valve Corporation did not contain defective springs.
The remaining actuator (serial number 917953) identified in the interim report which has not been returned to Limitorque is at Exelon Braidwood NGS. Exelon reported the following with regards to this actuator. The actuator is installed on a 36" quarter-turn MOV that is normally open and de-energized. This MOV has no safety related function to close. The MOV is position limit controlled and the valve functioned properly during operational testing after installation. Exelon Braidwood NGS is aware of the potential spring defect and plans to change the spring pack on this MOV at the first available maintenance cycle.
Flowserve's investigation of this issue concluded that this was an isolated incident and that all defective components have been identified.
Notified R3DO (Valos) and Part 21 Group (e-mail).
Received at: 06/2712012 17:24 4345229831 05:19:57 p.m. 06-27-2012 1 /4 Flowservc 5114 Woodall Road Lynchburg, VA. 24502 Flowserve To: NRC Operations Center Fax: (301) 816-5151 From: Jeff McConkey Date: 6/27/2012 Re: Pages: 4 including this cover sheet 0Urgent 0ForRevLew [E Please Comment 0 Please Reply C1 Please Recycle Notes: Limitorque part 21 Notification Interim Report Potential Defective Part in SMB-0 Heavy Spring Pack Thank You Jeff McConkey Quality Assurance Manager Flowserve Corporation - FCD Lynchburg 5114 WoodalU Road Lynchburg, VA 24506 (office) 434-845-9738 (cell) 434-851-4402 jmcconkey@flowserve.com
4345229831 05:20:19 p.m. 06-27-2012 2/4 Flow Control Division
- R Limitorque June 27, 2012 To: U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001 Attention: NRC Operations Center, Fax # 301-816-5151
Subject:
Limitorque Part 21 Notification Defective Part in SMB-O Heavy Spring Pack
References:
NRC Log # 2011-55-00 NRC Event No. / Accession No. ML11342A072 Limitorque Part 21 File # 70 Pursuant to I0CFR21.21, Flowserve Corp is providing notification of the identification of a defect. This information was initially reported to the NRC Operations center on 12/6/2011 (Event # 47505). This document is a follow-up to the interim Part 21 report included as Enclosure A.
Nineteen of the twenty actuators identified in the interim report as potentially suspect have been returned to Linitorque for inspection of the spring pack. All nineteen of these actuators were returned from two different valve manufacturer's facilities and had not been shipped to any utilities for installation. Six of the actuators returned from Velan Valve Corporation were found to contain defective springs. The spring packs were replaced and the actuators were returned to Velan Valve. The actuators returned from Weir Valve Corporation did not contain defective springs.
( The remaining actuator (serial number 917953) identified in the interim report which has not been returned to Limitorque is at Exelon Braidwood NGS. Exelon reported the following with regards to this actuator. The actuator is installed on a 36" quarter-turn MOV that is normally open and de-energized. This MOV has no safety related function to close. The MOV is position limit controlled and the valve functioned properly during operational testing after installation.( Exelon Braidwood NGS is aware of the potential spring defect and plans to change the spring pack on this MOV at the first available maintenance cycle. )
Flowserve's investigation of this issue concluded that this was an isolated incident and that all defective components have been identid.
Submitted By: /4 -
Kyle Ramsey, Chief Mechanical Engineer Jeff rctonkey, Quality As'surance Manager Flowserve Corporation 5114 Woodall Road Lynchburg VA 24506 Page 1 of 3
4345229831 05:21:18 p.m. 06-27-2012 3/4 FLOWSERVE o Flow Control Division FOR Limitorque Enclosure A
Subject:
Limitorque Part 21 Notification Interim Report Potential Defective Part in SMB-0 Heavy Spring Pack
Background:
During in-house production testing of Limitorque SMB-0 actuators, test lab personnel reported an inability to maintain consistent torque output at the various torque switch settings. Investigation revealed that the actuator torque spring pack assembly had lost preload during the test. Component inspection determined that the loss of preload was due to disc springs that had experienced an excessive permanent relaxation of free height during actuator testing.
Components Affected:
Only SMB/SB/SBD-0 actuators with heavy spring pack assemblies shipped between September 15, 2011 and November 7, 2011 could possibly be affected. No parts orders for SMB/SB/SBD-0 replacement heavy spring packs were built in this time period.
Potential Impact on Safety Related Operation A significant loss ofpreload on the actuator torque spring pack assembly could result in the actuator producing insufficient output torque thereby affecting proper valve function.
Cause and Corrective Action:
Communications with the spring manufacturer revealed that Limitorque was shipped a single lot of springs that were not in accordance with our parts requirements. These springs were incorrectly shipped to Limitorque due to a manufacturer backorder on our normally requested product. Vendor controls have been implemented to prevent reoccurrence of this issue. Limitorque has identified the problem springs and purged them from inventory.
On November 14, 2011 Limitorque notified all affected customers who received the actuators which shipped during the time period identified above. The serial numbers and locations of the potentially affected actuators are provided in the table below. Limitorque has requested that the actuator spring packs be returned for detailed inspection and replacement if needed.
After inspection of the spring pack assembly of all actuators listed below, Flowserve-Limitorque will issue a follow-up to this interim report on or before February 3, 2012.
Page 2 of 3
4345229831 05:22:15 p.m. 06-27-2012 4/4 Flow Control Division FLOWSERVE Limitorque Umitorque Customer Location of Actuator Order No. Quantity Actuator Serial #
Velan Valve Corp Velan Valve, Montreal 110309.001 6 909476 - 909481 Velan Valve Corp Velan Valve, Montreal 115055.001 1 926332 Weir Valve Corp Weir Valve, Ipswich, MA 106839.008 4 911621 - 911624 Weir Valve Corp Weir Valve, Ipswich, MA 106839.009 4 911625 - 911628 Weir Valve Corp Weir Valve, Ipswich, MA 106930.012 4 912769 - 912772 Areva NP Exelon, Braidwood NGS 112724.001 1 917953 Page 3 of 3