ML19340C851
| ML19340C851 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 10/31/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | William Jones OMAHA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 8012170809 | |
| Download: ML19340C851 (1) | |
Text
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NUCLEAR REGULATORY COMM!SSION i,,h((7 TIC
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REGION IV M
611 RYAN Pt.AZA ORIVE. sulTE 1000 AAUNGTON. TEX AS 76011 STATE October 31, 1980 Docker No.30-135 Omaha Public Power District AI"IN:
W. C. Jones, Division Manager -
Production Operations 1623 Harney Street 0=aha, Nebraska 68102 Gentlemen:
The enclosed IE Infor=ation Notice provides early notification of an event that
=ay have safety significance. Accordingly, you should review the Infor=ation Notice for possible applicability to your facility.
No specific action or response is requested at this ti=e; however, contingent upon the results of further staff evaluation, a Sulletin or Circular recom-mending cr requesting specific licensee actions.=ay be issued.
If you have questions regarding this =atter, please contact me.
Sincerely,
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Director
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Enclosures:
1.
IE Inforsation Notice No. 80-39 2.
List of Recently issued IE Infor=ation Notices cc:
S. C. Stevens, Manager Fort Calhoun Station Post Office Sox 98 For: Calhoun, Nebraska 68102 3012170F09 Q
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i SSINS No.
6835 Accession No.
8008220245 UNITED STATES l
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 MANUFACTURED BY VALCOR ENGINEERING CORPORATION t
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 manufacturer that did act meet the requirements of IE Bulletin No. 79-01 and its amendments, licensees and holders of construction permits should take into account the prob em identified in this Information Notice prior to making any similar substitution.
i BACKGROUND:
By TWX dated June 27, 1980, Valcor submitted a preliminary 10 CFR Part 21 Report addressing the malfunctioning of Valcor solenoid valres at the McGuire facility.
The malfunctioning valves have been identified as Valcor Valve Model No. V52600-554-1.
This TV: was aubsequer.tly followed by a letter dat.ed 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 l
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 cf the term v 14, 1980 to Duke Power Company, is matter entitled, " Outline -
f which is attached hereto as DUPLICATE DOCUMENT Entire document previously entered into system under:
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