ML19312D637
| ML19312D637 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 03/14/1980 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Crouse R TOLEDO EDISON CO. |
| References | |
| NUDOCS 8003250121 | |
| Download: ML19312D637 (1) | |
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UNITED STATES
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REGION 111 g.,-
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Docket No. 50-346 NI4 E Toledo Edison Company ATTN:
Mr. Richard P. Crouse Vice President Nuclear Edison Plaza 300 Madison Avenue Toledo, OH 43652 Gentlemen:
This Information Notice is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the infor-mation for possible applicability to their facilities. No specific action or response is requested at this time.
If further NRC evaluations so in-dicate, an IE Circular, Bulletin, or Generic Letter will be issued to recommend or request specific licensee actions.
If you have any questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
Sincerely, 8.
James G. y Fer
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Kep5 Director
Enclosure:
IE Information Notice No. 80-11 cc w/ enc 1:
Mr. T. Murray, Station Superintendent Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Harold W. Kohn, Power Siting Commission Helen W. Evans, State of Ohio 8003250/2)
R
l SSINS No. 6870 I
Accession No.:
UNITED STATES 7912190684 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 s..
March 14, 1980 IE Information Notice No. 80-11 GENERIC PROBLEMS WITH ASCO VALVES IN NUCLEAR APPLICATIONS INCLUDING FIRE PROTECTION SYSTEMS Description of Circumstances:
, is a Recall Notice from The Viking Corporation, dated July 16, 1979 that identifies ASCO valves used in certain Viking fire protection equipment that could fail.
Licensees should review their fire protection system components to determine if the equipment identified in the Viking Recall Notice is in their facility.
j If the identified equipment is installed in the fire protection system, then the iaodifications specified in the Recall Notice should be made and tested for proper operation.
The requirements of the technical specifications or any other licensee commitment should be complied with when a fire protection system is disabled.
South Carolina Electric and Gas Company (Virgil C. Summer Nuclear Station) reported to the NRC on October 24, 1979, a potential significant deficiency regarding the effects of oil on elastomeric materials used in ASCO NP-1 solenoid valves.
Specifically, these valves utilize an ethylene propylene elastomer which expands or swells when brought into contact with oils, possibly causing valve failure.
For this reason, ASCO specifies these NP-1 solenoid valves for use in " oil free instrument air" systems.
Although instrument air systems are " oil free" by design, installation instructions may specify the use of thread lubricants utilizing an oil base.
Thus, the potential exists for traces of this lubricant from threaded connec-tions in the air system, in addition to traces of oil from the air compressors themselves, to come into contact with the elastomers in the soleneid valves.
Degraded elastomers can cause the solenoid valve to fail by sticking, swelling closed flow paths, or rupturing causing leakage across the seat or to atmosphere.
Failure of the solenoid to function properly on an active valve could prevent l
a system from performing its required safety function.
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Some ASCO NP-1 solenoid valves are equipped with tags which state:
"Important -
this valve is equipped with ethylene by oils and greases. To be used for pipe threads of cutting oils." Care lubricants which do not contain oil fo DUPLICATE DOCUMENT Entire document previously nNO B/2f& stem undWe entered into s 6 57 1
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