ML20009C690
| ML20009C690 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 07/07/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20009C691 | List: |
| References | |
| ANPP-18335, IEB-81-02, IEB-81-2, NUDOCS 8107210363 | |
| Download: ML20009C690 (2) | |
Text
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Docket Nos. 50-528/529/530
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Mr. R. H. Engelken, Director
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Subject:
NRC I&E Bulletin No. 81-02 Failure of Gate Type Valves to Close Against Differential Pressure File: 'D.4.01 1; 81-055-026
Dear Mr. Engelkan:
In regards to the referenced Bulletin, the design of each Palo Verde Nuclear Generating unit uses two safety injection system valves that are associated with this Bulletin; SI604 and SI609. These are motoi-operated valves supplied by Borg-Warner, NVD P/N 77910.
Borg-Warner NVD was contacted and undertook to test the valves to the PVNGS design criteria. The attachment is the supplemental test report results which were prepared by Borg-Warner in response to this Bulletin.
Please note that Borg-Warner Valve P/N 77910 is the same as P/N 79190, except for the weld preparation. The actual tests were conducted on the 79190 valve by AETL. Their report 548-9142 dated May 8, 1981 is also attached.
The results of the test conducted ir. response to the concerns raised in the Bulletin demonstrated that the valve assembly successfully passed the flow interruption tests, resulting in zero leakage /5 minutes in the normal flow direction; the valve fully closed after the test conditions, there-fore, no corrective action is required for the Palo Verde Nuclear Generating Station.
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., s Mr. R. H. Engelken, Director July 7,1981 ANPP-18335 - JMA/WFQ Page 2 Approximately 80 manhours were expended in review and preparation of our response to this Bulletin.
Please contact me if you have any questions.
Very truly yours 3
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na E. E. Van Brunt, Jr.
APS Vice President, Nuclear Projects ANPP Project Director EEVBJr/WFQ/av Attachment cc:
J. Kerrigan P. Hourihan-B. Myerson (w/ attach.)
A. C. Gehr W. H. Wilson J. A. Roedel
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