ML19339C158
| ML19339C158 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 10/31/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Tallman W PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| References | |
| NUDOCS 8011170663 | |
| Download: ML19339C158 (1) | |
Text
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UNITED STATES I h,(, ~,j NijCLEAR REGULATORY COMMISSION 3 g' ' ^' c8 REGION I 8, ',
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631 PARK AVENUE
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,o KING cP PRUSSIA, PENNSYLVANIA 19406 b
o October 31, 1980 g
Docket Nos. 50-443 3
50-444 l_g,
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.. r Public Service Company of New Hampshire y
- ,d ATTN:
Mr. W. C. Tallman
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- g Chairman and Chief Executive Officer A
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1000 Elm Street Manchester, New Hampshire 03105 Gentlemen:
The enclosed IE Information Notice No. 80-39, " Malfunctions of Solenoid Valves Manufactured by Valcor Engineering Corporation," is fonvarded to you for information.
No written response is required.
If you desire additional information regarding this matter, please contact this office.
Sincarely, 2
.c So a H. Grier Dir?ctor
Enclosures:
1.
IE Information Notica No. 80-39 2.
List of Recently Issued IE Information Noticas CONTACT:
D. L. Cachton (215-337-5256) cc w/encis:
John DeVincentis, Project Manager l
8011170 3 3 62
SSINS No.:
6835 Accessicn N2.:
8008220245 IN 80-39 UNITED STATES NUCLEAR REGULATORY CCMMISSION l
0FFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C. 20555 l
October 31, 1980 IE INFORMATION NOTICE NO. 80-39: MALFUNCTION OF SCLENOID VALVES MANUFACTURED BY VALCOR ENGINEERING CORPORATION PURPOSE:
The intent of this Information Notice is to alert holders of construction permits and operating licenses for nuclear power plants of a potentially generic problem involving the malfunctioning of certain solenoid valves manu-factured by the Valcar Engineering Corporation (Valcor).
The solenoid valves so involved are designated as Valcor Valve Model No. V52600-554-1.
Valcor has l
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 Sullatin.No. 79-01 and its amendments, licensees and holders of construction perr ts should take into account the problem identified in this Information Notice prior to making any similar substitution.
BACKGROUNO:
By TVX dated June 27, 1980, Valcor submitted a preliminary 10 CFR Part 21 Report addressing the malfunctioning of Valcor solencid valves at the McGuire facility.
The malfunctioning valves have been identified as Valcor Valve Model No. 52500-554-1.
This TVX was subsequently followed by a lettar dated July 3,1980, transmitting a more detailed Part 21 Report entitled," Quality Assurance 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 frcm OPEN to CLOSE to OPEN immediataly after a sustained period of operation in the energized (OPEN) mode.
Although the val'es are rated for "continucus operation", Valect contends that the valves were not designed to meet the operating conditions requiring the immediata cycling frca GPEN *w CLOSE to OPEN after a sustained period of continuous energi::ation.
A major source of the problem, therefore, may be a mi= understanding of the term
" continuous operation".
By lettar dated July 14, 1980 to Duke Power Company, Valcor transmitted its recommendations 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:
ANO b d h M h No. of ages:
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