ML19340C865
| ML19340C865 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 10/31/1980 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Papay L SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 8012170852 | |
| Download: ML19340C865 (1) | |
Text
_--__-- _ _-____
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A,5 Recog UNITED STATES
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NUCLEAR REGULATORY COMMISSION o
REGION V 0,
1990 N. CALIFORNIA BOULEVARD SUITE 202, WALNUT CREEK PLAZA a
Se,,e WALNUT CREE K, CALIFORNIA 94596 1
1 October 31, 1980 l
Docket f:os. 50-206, 50-361, 50-362 r
Southern California Edison Comoany P. O. Box 800 l
22a,4 Walnut Grove Avenue Rosemead, California 91770 i
J Attention:
Dr. L. T..tpay, Vice President Advanced Engineering Gentlemen:
I The enclosed Information liotice provides earij notification of an event that may have safety significance. Accordingly, you should review the Information flotice for possible applicability to your facility.
No specific action or response is requested at this time; however, contingent upon the results of further staff evaluation, a Bulletin or Circular recom-mending cr requesting specific licensee actions may be issued.
If you have questions regarding this matter, please contact me.
Sincerely,
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l 5II.Engeiken,. f-M Ll f
Di rector
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Enclosures:
1.
IE Information flotice No. 80-39 2.
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8008220245 I!1 80-39 U!1ITED STATES
- UCLEAR REGULATORY COMf11SSI0tl 0FFICE OF IflSPECTI0fl filD ErlF0PCEf!EflT UASHIt:GT0!1, D. C. 20555 l
October 31
, 1980 IE IflFORMATI0tt tiOTICE t'0. 80-39 t1ALFUtlCTI0tl 0F SOLEil01D VALVES MAflUFACTURED CY VALCOR Ef;GIllEERIt;G CORPORATI0tl PURPOSE:
The intent of this Information flotice is to alert holders of construction l
pemits and operatino licenses for nuclear power plants of a potentially generic problem involvinn the nalfunctioning cf certain solenoid valves manu-factured by the Valcor Enqineering Corocration (Valcor). The solenoid valves so jnvolved are designated as Valcor Valve flodel flo. V52600-554-1.
Valcor has infomed us that these valves nave only been suoplied to the McGuire f acility; however, since tnese valves were suostituted for solenoid valves of another manufas.turer that did not meet tne requirenents of IE Eulletin flo. 79-01 and its amerdnents, licensees and holders of construction permits should take into account the problem identified in this Information flotice prior to making any similar substitution.
BACKGROUtlD:
l By THX dated June 27, 1930, Valcor submitted a preliminary 10 CFR Part 21 Report addressing the nalfunctioning of Valcor solenoid valves at the IdcGuire i
facili ty.
The malfunctioning valves have been identified as Valcor Valve i
Model flo. 52600-554-1. 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 flo.1.
In brief, the malfunction appears to be an intermittent type wherein the valve fails to cycle from OPEfl to CLOSE to OPEfl immediately af ter a sustained period of operation in the energized (OPEt!) mode. Although t% valves are rated for
" continuous operation", Valcor contends that the valve: were not designed to l
meet the operating conditions requiring the immediate (, cling from 0PEli to CLOSE to OPEtl after a sustained period of continuous energization. A major source of the problem, therefore, may be a misunderstanding of the term
" continuous oneration". By letter dated July 14, 1980 to Duke Power Company, Valcor transmitted it; recommendations in this matter entitled, " Outline -
Suggested !!odification Procedures", a copy of which is attached hereto us Enclosure flo. 2.
DUPLICATE DOCUMENT Entire document previously entered into system under:
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No. of pages:
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