ML19340C852
| ML19340C852 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 10/31/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 8012170812 | |
| Download: ML19340C852 (1) | |
Text
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d CENTRAL FILES u.tiTEc STATES PDR:HQ s
LPDR t
NUCLEAR REGULATORY COMMISSION 77g
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REGION IV M
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611 RYAN PLAZA DRfvE. sulTE 1000 ARuNGTCN. TEXAS 76011 STATE October 31, 1980 Docket No.
50-298 Nebraska Public Power District AITJ:
J. M. P11 ant, Director Licensing & Quality Assurance
? cst Office Sox 499 Columbus, Nebraska 68601 Gentlemen:
The enclosed IE Information Notice provides early notification of an event that may have safety significance. Ae ordingly, you should review the Information Notice for possible applicabil'.y to your facility.
No specific action or response is requested at this time; however, contingent 1
upon the results of further staff evaluation, a Bulletin or Circular recom-nending or requesting specific licensee actions nay be issued.
If fou have questions regarding this natter, please contact na.
Sincerely, yl r
G.,% - [ ~ ?^ ~~..l-- f Karl V. Seyfrit g./
Director
/
1
Enclosures:
1.
IE Information Notice No. 80-39 2.
List of Recently issued IE Information Netices cc:
L. C. Lassor, Superintendent Cooper Nuclear Station Post Office Sox 98 3rownv111e, Nebrasica 68321 i
i
SSINS No.-
6835 Accession No.
8008220245 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C. 20555 IE Information Notice No. 80-39 Date:
October 31, 1980 Page 1 of 1 MALFUNCTION OF SOLEN 0ID VALVES MANbTACTURED BY VALCOR EUGINEERING 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 Valcor Engineering Corporation (Valcor).
The solenoid valves so involved are designated as Valcor Valve Model No. V52600-554-1.
Valcor has informed us that these valves have only been supplied to the McGuire facility; however, since these valves were substituted for solenoid valves of another 4
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 Notice prior to making any similar substitution.
BACKGROUND:
By TW i.ced June 27, 1980, 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 Valcor Valve Model No. V52600-554-1.
This TWX was subsequently followed by a letter 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 intermittent type wherein the valve fails to cycle from OPEN to CLOSE to OPEN immediately 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 OPEN to CLOSE to OPEN after a sustained period of continuous energization.
A major source of the problem, therefore, may be a misunderstanding of the term
"~ '
July 14, 1980 to Duke Power Company, this matter entitled, " Outline -
DUPLICATE DOCUMENT Entire document previously entered into system under:
ANO b d b of pagesI _ 7 No.
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