ML11342A072
| ML11342A072 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 12/06/2011 |
| From: | Mcconkey J Flowserve Limitorque Actuators |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 47505 | |
| Download: ML11342A072 (5) | |
Text
1210612011 U.S. Nuclear Regulatory Commission OperationsCenter Event Report Pa-ce I Part 21 (PAR) Event# 47505 Rep Org: FLOWSERVE LIMITORQUE ACTUATORS Notification Date / Time: 12/06/2011 16:43 (EST)
Supplier: FLOWSERVE LIMITORQUE ACTUATORS Event Date / Time: 12/05/2011 (EST)
Last Modification: 12/06/2011 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
I 12/06/2011 U.S. Nuclear Regulatory Commission OperationsCenter Event Report Paoe 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
.4345229831 04:42:54 p.m. 12-06-2011 1 /3 Flowserve 5114 Woodall Road Lynchburg, VA. 24502 Flowserve To: NRC Operations Center Fax: 301-816-5151 From: Jeff McConkey Date: 12/6/2011 Re: Pages: 3 0 Urgent E0 For Review 0 Please Comment 13 Please Reply 01 Please. Recycle Notes: Limitorque Part 21 Notification Interim Report Potential Defective Part in SMB-0 Heavy Spring Pack Jeff McConkey Quality Assurance Manager Flowserve Corporation - FCD Lynchburg (434) 845-9738 (Office)
(434) 851-4402 (Cell) jmcconkey@flowserve.com
- 4345229831 04:43:17 p.m. 12-06-2011 2/3 FLOWSE RVE Fwc.o v o Flow Control Division
.R Limitorque December 5, 2011 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 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 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 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 1 of 2
- 4345224831 04:44:21 p.m. 12-06-2011 3/3 Flow Control Division FLOWSERVE Limitorque Limltorque 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 Submitted By:
Kyle Ramsey, Chief Mechanical Engineer Jeff McConkey, Quality Assurance Manager Flowserve Corporation Limitorque 5114 Woodall Road Lynchburg VA 24506 Page 2 of 2