ML19340C855
| ML19340C855 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/31/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 8012170822 | |
| Download: ML19340C855 (1) | |
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- J 611 RY AN PtAZA DRIVE. sUtTE ?000 ARLINGTON. TEXAS 76011 October 31, 1980 M
O In Reply Refer To:
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Docket Nos.
50-445/IE Infor=ation Notice Nc. 80-39 L,
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N 50-446/IE Infor=ation Notice No. 80-39
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'fi Texas Utilities Generating Co=pany g
E3 ATTN:
Mr. R. J. Gary, Executive Vice a
President and General Manager 2001 Bryan Tower Dallas, Texas 75201 Gentle =en:
The enclosed IE Information Notice provides early notification of an event that
=ay have safety significance.
Accordingly, you should review the Information Notice f or possible applicability to your facilities.
No specs.fic action or respcase is re. quested at this ti=e; however, contingent upon the results of further staff evaluation, a Bulletin or Circular reco=-
=ending or requesting specific licensee actions =ay be is :ed.
If you have questions regarding this matter, please contact =e.
Sincerely,
/q
...-;, n Karl J Seyfrit '/
Director
/d
Enclosures:
1.
IE Infor=ation Notice No. 30-39 2.
List of Recently issued IE Infornation Notices 80 12]eo 9 2_ L
SSINS No.-
6835 Ac<ession 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 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 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 cf 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. V52600-554-1.
This TVX was subsequent.'y followed by a letter dated July 3, 1980, transmitting a more detailed Part il 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 r.o cycle from OPEN to CLOSE to OPEN immediately after a sustained period of Operation in the energized (OPEN) mode.
Although the val.es 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 "c
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- ly 14, 1980 to Duke Power Company, his matter entitled, " Outline -
ch is anac M heret) as DUPLICATE DCCUMENT Entire document previously entered into system under:
ANO No. of pages:
7
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