ML20099L168
| ML20099L168 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 11/21/1984 |
| From: | Milinazzo P BYRON JACKSON PUMP |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| REF-PT21-84-540-000 PT21-84-540, PT21-84-540-000, Q-84-327-PLM, NUDOCS 8412010035 | |
| Download: ML20099L168 (4) | |
Text
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. A Nuchar Velve Division inment YECElveu Borg Warnit r',orporation n:p a 7500 Tyror e Ave., Van Nuys, California 91409
- Telephone: 213-781 4000 Mailing Ad Jress: P.O. Box 2185, Van Nuys, Ca!ifornia
- TWX 910-495-1726 B34 F0/ 23 D4 B Cr November 21, 1984 Refer to: Q-84-327/PLM g gg;gg ;,-
John B. Martin, Director, Region V Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 450 Maria Lane, Suite 210 Walnut Creek, California 94596
Subject:
10CFR21 Notification Report #0007
Dear Mr. Martin:
The attached report serves as formal written notification of a hardware problem as required by 10CFR21, which was discovered at Cleveland Electric Company, Perry Nuclear Station Units 1 & 2.
This report is filed on the basis of one known safety related application of a deficient valve delivered to Cleveland Electric.
The attached report should be considered preliminary and is being submitted for information orly. A formal final report will be submitted when our analysis of the condition is completed and the required corrective action is determined.
If additional information is required, please do not hesitate to contact me.
i l
Very truly yours, I
l BORG-WARNER CORPORATION Nuclear Valve Division P.L. Milinazzo Manager, Quality Assurance PLM/sa l
Attachment i
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0 Nuclear Valve Division Energy Borg-Warner Corporation NOTIFICATION REPORT 7500 Tyrone Ave., van Nuys, California 91409 to Nuclear Regulatory Commission PART NUMBER 81040-2. S/N 54512 N/R No.
0007 PART NAME Gate Valve, 20 Inch, 900#
CUSTOMER Cleveland Electric Company MANUFACTURER Nuclear Valve Division PROJECT Perry Station, Units 1 & 2 Borg-Warner Corporation DATE DEFECT DISCOVERED 11/19/84 DESCRIPTION OF NONCONFORMANCE, ANALYSIS OF CONDITION, AND CORRECTIVE ACTION (ATTACHSUPPORTINGDATA).
During the cycling of the above stated gate valve, the valve failed to open completely. Said valve was disassembled and reinspected to determine the cause of failure. The welded in body gate guides were found to be damaged due to galling caused by the gate. This condition was the result of a design error which allowed the guides to be welded in a position which creates a misalignment between the gate and the body guide rails. This condition could potentially exist on a total of ten (10) 20" valves supplied to the Cleveland Electric Illuminating Company by Borg-Warner, Nuclear Valve Division under various part numbers. This condition is isolated only to the 20" gate valves supplied to Cleveland Electric for Perry Nuclear Power Plants l&2.
During NVD's analysis of said failed valves, it was discovered that a second design problem existed. The fillet weld for welding in the guides to the body is not adequate for any valve which might be subjected to a differential pressure in excess of 600 psi during cycling of the valve. A review of the customer valve data sheets indicates that four (4) valves would be subjected to a differential pressure above the 600 psi range.
Borg-Warner, Nuclear Valve Division, in cooperation with the Cleveland Electric Illuminating Company, is formulating an inspection and corrective action plan to resolve these deficiencies.
QUANTITY AND LOCATION OF ALL SIMILAR ITEMS DELIVERED WITHIN THE U.S.A. THAT CONTAIN THE SAME NONCONFORMANCE.
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