ML19339C255
| ML19339C255 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 10/31/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Dunn C DUQUESNE LIGHT CO. |
| References | |
| NUDOCS 8011170909 | |
| Download: ML19339C255 (1) | |
Text
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e UNITED STATES
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k NUCLEAR REGULATORY COMMISSION j
REGION I 4
831 PARK AVENUE
,8 KINO oF PRUSSIA, PENNsY1.VANIA 19406
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October 31, 1980
.?N c-Docket No. 50-334
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Duquesne Light Company fli;;.;
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ATTN:
Mr. C. N. Dunn
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- r;.4 Vice President
@y Operations Division-
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,g 435 Sixth Avenue to Pittsburgh, Pennsylvania 15219 Gentlemen:
The enclosed IE Information Notice No. 80-39, " Malfunctions of Solenoid Valvas Manufactured by Valcor Engineering Corporation," is forwarded to you for information.
No written response is required.
If you desire additional information regarding this matter, please contact this offica.
Sincerely,
/
Bo a H. Grier Director Enclosuns:
1.
IE Information Notice No. 80-39 2.
List of Recently Issued IE Information Notices CCNTACT:
D. L. Caphton (215-337-5266) cc w/encis:
F. Bissert, Technical Assistant Nuclear R. Washabaugh, QA Manager J. Wer11ng, Station Superintendent G. Moore, General Superintendent, Pcwer Stations Depart:nent J. J. Carey, Ofrector of Nuclear Operations R. Martin, Nuclear Engineer J. Sieber, Superintendent of Licensing and Compliance, BVPS l
o
SSIMS No.:
6835 Accession No.:
8008220245 IN 80-39 UNITED STATES NUCLEAR REGULATORY COMMISSIC:.
OFFICE OF INSPECTION AND ENFORCENENT WASHINGTON, D. C. 20555 October 31, 1980 IE INFORMATION NOTICE NO. 80-39: MALFUNCTION OF SOLENOID VALVES MANUFACTijRED BY VALCOR ENGINEERING CORPORATION PURPOSE:
The intant 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-1 factured by the Valcor Engineering Corporation (Velcor).
The solenoid valves so involved are designated as Valcor Valve Model No. V52600-554-1.
Valcar has l
infomed us that these valves have only been supplied to the McGuire facility; however, since these valves were substituted for solenoid valves of another l
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 ModeT No. 52500-554-1.
This TWX was subsequently followed by a letter dated July 3,1980, transmitting a more detailed Part 21 Report entitled," Quality Assuranca 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 CPEN immediataly after a sustained period of operation in the energi:ed (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 imediata cycling from GPEN to CLOSE to CPEN after a sustained period of continuous energization.
A major-source of the problem, therefore, may be a misunderstanding of the tarm
" continuous operation".
By letter dated July 14, 1980 to Duke Power Company, Yalcar transmitted its recommendations in this mattar entitled, " Outline -
1 Suggested Modification Procedures", a copy of which is attached hereto as Enclosure No. 2.
I DUPLICATE DOCUMENT Entire document previously entered into system under:
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