ML19339C239
| ML19339C239 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 10/31/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Counsil W NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| NUDOCS 8011170887 | |
| Download: ML19339C239 (1) | |
Text
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UNITED STATES g
NUCLEAR REGULATORY COMMISSION y
l REGION I 8,
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$31 PARK AVENUE
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KINC of P RUSSIA, PENNsYl.VANIA 19406 Docket Nos. 50-245 50-336 50-423 Q
-E Northeast Nuclear Energy Company
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ATTN:
Mr. W. G. Counsil Ug.(!
Senior Vice President - Nuclear m
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Engineering and Operations N
P. O. Box 270 Q
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Hartford, Connecticut 06101
^J Gentlemen:
The enclosed IE Information Notica No. 80-39, " Malfunctions of Solenoid Valves Manufactured by Valcor Engineering Corporation," is forwarded to you for information.
No writtan response is required.
If you desirs additional inforsation regarding this matter, please contact this offica.
Sincerely, So a H. Grier Director
Enclosures:
1.
IE Information Notice No. 80-39 2.
List of Recently Issued IE Infomation Noticas CCNTACT:
D. L. Caphton (215-337-5256) cc w/encis:
J. F. Opeka, System Superintendent Nuclear Operations E. J. Mroczka, Station Superintendent D. G. Diedrick, Manager of Quality Assurance J. R. Himmelwright, Licensing Safeguards Engineer K. W. Gray, Supervisor of Construction Quality Assurance H. R. Nims, Director of Nuclear Projects t
8 011 1 'r
SSINS No.:
6835 Accessien No.:
8008220245 IN 80-39 UNITED STATES NUCLEAR REGULATORY COMMISSION l
OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C. 20555 October 31, 1980 IE INFORMATION NOTICE NO. 80-39: MALFUNCTION OF SOLEN 0ID VALVES MANUFACTURED BY VALCOR ENGINEERING CORPORATION PURPOSE:
The intent of this Information Notice is to alert holders of construction permits and operating Ifcenses for nuclear power plants of a potentially generic problem involving the malfunctioning of certain solenoid valves manu-factured by the Valcor Engineering Corporation (Valcor).
The solenoid valves so involved are designated as Valcor Valve Model No. V52600-554-1.
Valcor has infomed us that these valves have only been supplied to the McGuire facility; however, since these valves were substituted for solenoid valves of another manufacturer that did not meet the requirements of IE Bulletin.No. 79-01 and its amendments, licensees and holders of construction permits should take into account the problem identified in this Information Notica prior to m'aking any similar sucstitution.
SACKGRCUNO:
By TWX dated June 27, J80, Valcor submitted a preliminary 10 CFR Part 21 Report addressing the malfunctioning of Valcor solenoid valves at the McGuire facility.
The malfunctioning valves have been identified as Valcar Valve Model No. 32500-554-1.
This TVX was subsequently fo11cwed by a lettar dated July 3,1980, transmitting a more detailed Part 21 Report entitled," Quality Assuranca Report", a copy of which is attached hereto as Enclosure No.1.
In brief, the malfunction appears to be an intermittant type wherein the valve fails to cycle from OPEN to CLOSE to OPEN imediately after a sustained period of operation in the energized (OPEN) mode.
Although the valves are rated for
" continuous operation", Valcor contends that the valves were not designed to meet the operating conditions requiring the immediate cycling from GP3 to CLOSE to CPEN after a sustained period of continuous energi stion.
A major source of the problem, therefore, may be a misunderstanding of the tarm
" continuous operation".
By letter dated vuly 14, 1980 to Duke Power Company, Valcor transmitted its reconnendations in this matter entitled, " Outline -
Suggested Modification Procedures", a copy of which is attached hereto as Enclosure No. 2.
DUPLICATE DOCUMENT Entire document previously entered into system under:
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