ML19295F974
| ML19295F974 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 10/31/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| References | |
| NUDOCS 8012180011 | |
| Download: ML19295F974 (1) | |
Text
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- pa "'49'o, UNITED STATES
~ 7, NUCLEAR REGULATORY COMMISSION
,,7 REGION ll
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o 101 MARIETTA sT.. N.W.. sulTE 3100 ATLANTA, GEORGIA 3o3o3 o
OCT 3 1980 In Reply Refer To:
RII:JPO WJ A
South Carolina Electric and Gas Company
~
ATTN:
T. C. Nichols, Jr., Vice President Power Production and Systems Operations m
P. O. Box 764 Columbia, SC 29218 Gentlemen:
The enclosed Information Notice provides early notification of an event that may have safety significance. Accordingly, you should review the Information Notice 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 of Circular recom-mending or requesting specific licensee actions may be issued.
If you have questions regarding this matter, please contact me.
Sincerely, wg f n
James P. O'ReilIy Director
Enclosures:
1.
IE Information Notice No. 80-39 w/ Enclosure 2.
List of Recently Issued IE Information Notices cc w/ encl:
A. A. Smith, Site QA Coordinator J. B. Knotts, Jr O. S. Bradham, Manager Nuclear Operations
,80121800l/ '
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UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEENT WASHINGTON, D. C. 20555 October 31, 1980 IE INFORMATION NOTICE NO. 80-39 MALFUNCTION OF SOLENOID 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 mana-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 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 TWX dated 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. 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 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
" continuous operation".
By letter 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.
Enclosures:
1.
Quality Assurance Report DUPLICATE DOCUMENT Entire document previously entered into system under:
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ANO No. of pages:
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