ML103190730
| ML103190730 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 11/11/2010 |
| From: | Arnone R ASCO Valve |
| To: | NRC Region 4 |
| References | |
| 46340 | |
| Download: ML103190730 (7) | |
Text
11/111/2010 U.S. Nuclear Regulatory Commission OperationsCenter Event Report Paive I General Information or Other (PAR) Event# 46340 Rep Org: ASCO VALVE Notification Date I Time: 10/18/2010 13:09 (EST)
Supplier: AREVA Event Date / Time: 09/18/2010 (EDT)
Last Modification: 11/11/2010 Region: 1 Docket #:
City: AIKEN Agreement State: Yes County: License #:
State: SC NRC Notified by: ROBERT ARNONE Notifications: VIVIAN CAMPBELL R4DO HQ Ops Officer: JOE O'HARA PART 21 GRP Emergency Class: NON EMERGENCY 10 CFR Section:
21.21 UNSPECIFIED PARAGRAPH POTENTIAL EXTERNAL LEAKAGE IN SOLENOID VALVE The following notification was received via fax:
"On 9/18/10 a single solenoid valve was returned to ASCO with a reported problem of external leakage at the bonnet arba below the coil housing. The valve was returned from Cooper Nuclear Station through AREVA, who was the distributor.
"The returned valve was retested at ASCO. No external leakage was observed when the valve was tested in the de-energized state. However, when the valve was tested in the energized state, the reported leakage was confirmed. The root cause of the leakage was determined to be a misaligned O-ring between the solenoid base sub-assembly and the valve body.
"The customers that were shipped affected valves are being notified of the potential non-conformance. ASCO will recommend the affected valves be returned to be retested in accordance with updated test procedures."
- *
- UPDATE FROM ROBERT ARNONE TO JOE O'HARA VIA FAX AT 1308 ON 11/11/10 * * *
"In our continuing investigation of the external leakage in NP8320 solenoid valves (Ref A), ASCO has identified an additional group of valves which could be potentially susceptible to such leakage. The initial review focused on our standard NP8320 products and did not include our special construction valves. However, we expanded our review to include all special as well as standard NP8320 valves. As a result, the quantity of potentially affected valves has increased from 174 to 438. In response to this new information, revised notices were sent to the original customers and the newly identified customers: ASCO Canada, SPX Industries, and Flowserve.
11/11/2010 U.S. Nuclear Regulatory Commission OperationsCenter Event Report Page 2 General Information or Other (PAR) Event# 46340 "As of this date, 115 valves have been returned. None of these returned valves has exhibited external leakage when retested per the updated procedure."
Through their expanded review process, ASCO did not identify any additional commercial nuclear power plant customers which had purchased valves susceptible to the leakage issue.
Notified R4DO (Gaddy) and Part 21 Group via e-mail.
Received at: 11/11/2010 13:06 Nov. 11. 2010 2:04PM ASCO VALVE AIKEN PLANT No. 3900 P, I AS 4.Valve Manufactudng, Inc.
AIKEN, S.C.
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Nov, 11. 2010 2:04PM ASCO VALVE AIKEN PLANT No. 3900 P. 2 EMERSON.
Industrial Automation ASCO Valve, Inc.
50 HanoVer Road Florham Park, NJ 07932 USA T (973) 966 2000 F (973) 966 2628 www.asconumatics.com November 11, 2010 NRC Documents Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-001
Subject:
Update to Report of Oct. 18, 2010 - External leakage in NP8320 solenoid valve Reference A - ASCO Valve, Inc. letter to NRC dated 10/18110 Reference B -NRC Licensee Event Report # 46340 (10/18/10)
Gentlemen:
In our continuing investigation of the external leakage in NP8320 solenoid valves (Ref A), ASCO has identified an additional group of valves which could be potentially susceptible to such leakage. The initial review focused on our standard NP 8320 products and did not include our special construction valves. However, we expanded our review to include all special as well as standard NP8320 valves. As a result, the quantity of potentially affected valves has increased from 174 to 438. In response to this new information, revised notices were sent to the original customers and the newly identified customers ASCO Canada, SPX Industries, and Flowserve.
As of this date, 11;5 valves have been returned. None of these returned valves has exhibited external leakage when retested per the updated procedure.
If you have any questions, you can contact Bob Arnone at 803-641-9395.
Very Truly Yours,
[era Gacadýý Vice-President Quality ASCO Valve, Inc.
Asuai nhumaTicm'.
Nov, 11, 2010 2:04PM ASCO VALVE AIKEN PLANT No, 3900 P. 3 EMERSON-Industrial Automation ASCO Valve, Inc.
50 Hanover Road Florhai* Park, NJ 07932 USA T (973) 966 2000 F (613) B66 2828 www.asconum-atlcs.com October 18, 2010 NRC Documents Control Desk U.S. Nuclear Regulatory Commission Washington, D.C, 20555-001
Subject:
External leakage in NP8320 solenoid valve Reference A - ASCO letter to AREVA dated 9/1312010 Reference B- ASCO Returned Material Authorization (RMA) number 44797 Gentlemen:
The enclosed information relates to a single NP8320 ASCO valve identified by Cooper Nuclear Station to exhibit external leakage. The customers who have received similar valves potentially susceptible to external leakage are being notified.
ASCO does not have adequate knowledge of the actual installations and operating conditions of these valves to determine whether this condition could create a "substantial safety hazard" as defined in IOCFR2I.3. This Information is intended to provide Investigation results and corrective action.
Background - On 9/8/2010, a single NP8320 solenoid valve (NP832094E 120/60,110/50, serial number A408921-004) was returned to ASCO with a reported problem of external leakage at the bonnet area below the coil housing. This valve was I of 5 produced on an order for AREVA in April 2010. The valve was returned from Cooper Nuclear Station through AREVA, who was the distributor. See Ref S.
The returned valve was retested at ASCO. No external leakage was observed when the valve was tested In the de-energized state. However, when the valve was tested In the energized state (power was applied to [he valve coil), the reported leakage was confirmed. The root cause ofthe leakage was determined to be a misaligned 0-ring between the Solenoid Base Sub Assembly (SflSA) and the valve body.
ASCO's NP8320 series valves are offered in 2 different body materials, bra$s or stainless steel; with 2 different types of seals and disc, Ethylene Propylene or Viton ; and for 3 different forms of flow, Normally-Closed, Normally-Open and Universal. The NP832094E returned Is a stainless steel valve with Ethylene Propylene seals and Discs for Normally-Closed form of flow-For Normally-Closed valves, air pressure is to be applied at port 2. This port is blocked when the valve is de-energized and the cylinder port 1 Is exhausted through the exhaust port 3. When the valve is energized pressure is allowed to flow to the cylinder port at 1, and the exhaust port at 3 is blocked. See Figure 1 on next page.
For Normally-Open valves, pressure Is applied at port 3. This port is connected to port 1 when de-energized and port 2 Is blocked. When the valve is energized, port 3 Is blocked and the pressure at the cylinder port I Is exhausted through port 2.
1NUMBiDTI'C.. Viton is registered Trademark of DuPont Co.
. Nov. I 1. 2010 2:'04PM ASCO VALVE AIKEN PLANT No. 3900 P. 4 Universal valves can be connected as either Normally-Closed or Normally-Open, NORMALLY OPEN DE-ENERGIZED ENERGLZED Ficiu~re I ASCO Investigation Results - As part of ASCO's investigation, ASCO requested that AREVA return all NP8320 valves In their stock for retest, 91 more valves were returned and retested at ASCO. None exhibited external leakage In either the energized or de-energized state.
As a further part of our Investigation we discovered that the written test procedure did not provide explicit Instructions to energize the valve during the external leakage portion of the test. For Normally-Closed and Universal valves the solenoid must be energized to pressurize the Internal cavity (The internal cavity of the valve Is defined by the SBSA, valve body and lower end cap). For Normally-Open valves, the Internal cavity Is pressurized when de-energized, so they are not affected).
The manufacture of the NP8320 valve series was transferred to Alken, SC from Florham Park, NJ on October 1, 2009. Interviews with Engineering and test personnel at Aiken indicated that the valves were not energized to pressurize the cavity when conducting the external leakage test, Interviews with Engineering and test personnel at Florham Park indicated that the valves were energized to pressurize the cavity when conducting the external leakage test, even though the test procedure did not specifically require this. ASCO has therefore concluded that NP8320 valves manufactured and shipped from Aiken, SC after the transfer date could be potentially affected, but not the valves produced at Florharn Park.
Impact on Performance - ASCO believes that any external leakage caused by a misaligned 0-ring would likely be immediately apparent and detectable upon initial installation and operation. This condition does not affect basic operation of the valve and is unlikely to degrade over time.
Interim Action - The test procedure for the NP8320 valves has been revised to ensure that any external leakage is detected.
Containment Action - A preliminary report was provided to AREVA (Reference A) on 9/1 312010. There were a total of 174 of this series valves shipped from Aiken, SC since October 1, 2009. 145 of the 174 valves were shipped to AREVA (includes the 92 retested above). 25 valves were shipped to our subsidiary, ASCO ASIA. 4 valves were shipped to Ralph A. Hiller Co. of Export, PA, Corrective Action - The customers that were shipped affected NP8320 valves are being notified of the potential non-conformance, ASCO will recommend the affected valves be returned to be retested in accordance with the updated test procedure.
If you have any questions, you can contact Bob Arnone at 803-641-9395.
Very Truly Yours, Lars Gaod Vice-President Quality ASCO Valve, Inc.
nUMaTMil.
Nov. 11. 2010 2:04PM ASCO VALVEIAIKEN PLANT No, 3900 P. 5 1041/2020 0U,, NuclearRegulaqory Commnssl6n Operations Center Event Report Page I General Information or Other (PAR) Event# 46340 Rep Org: ASCO VALVE Ndtification Date I Time: 10/18/2010 13:09 (EDT)
Supplier: AREVA Event Date ITime: 09/1812010 - (EDT)
Last Modification; 10/18/2010 Region: 1 Docket#:
City: AIKEN Agreeriient State: Yes County: License U; Statet SC NRC Notified by: ROBERT ARNONE Notifications: VIVIAN CAMPBELL 13D4 HQ Ops Officer: JOE O'HARA PART 21 GRP Emergency Class: NON EMERGENCY 10 CFR Section; 21.21 UNSPECIFIED PARAGRAPH POTENTIAL EXTERNAL LEAKAGE IN SOLENOID VALVE The following notification was received via fax:
"On 9/18/10 a single solenoid valve was returned to ASCO with a reported problem of external leakage at the bonnet area below the coil housing. The valve was returned from Cooper Nuclear Station through AREVA, who was the distributor.
"The returned valve was retested at ASCO. No external leakage was observed when the valve was tested in the de-energized state. However, when the valve was tested in the energized state, the reported leakage was confirmed. The root cause of the leakage was determined to be a misaligned O-ring between the solenoid base sub-assembly and the valve body.
"The customers that were shipped affected valves are being notified of the potential non-conformance. ASCO will recommend the affected valves be returned to be retested in accordance with updated test procedures."
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