ML19312D666
| ML19312D666 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/14/1980 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Papay L SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 8003250159 | |
| Download: ML19312D666 (1) | |
Text
a
/
~#
'o UNITED STATES 8'
~
- h, NUCLEAR REGULATORY COMMISSION REGION V 8
1990 N. CALIFORNIA BOULEVARD
% *e,,* 8 SulTE 202, WALNUT CREEK PLAZA WALNUT CREEK, CALIFORNIA 94596 March 14, 1980 Docket Nos. 50-206, 50-361 & 50-362 Southern California. Edison Company P. O. Box 800 2244 Walnut Grove Avenue Rosemead, California 91770 Attention:
Dr. L. T. Papay, Vice President Advanced Engineering Gentlemen:
This Information Notice is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the information for possible applicability to their facilities. No specific action or response is requested at this time.
If further NRC evaluations so indicate, an IE Circular, Bulletin, or Generic Letter will be issued to recommend or request specific licensee-actions.
.If you have questions regarding the matter, please contact the Director of the appropriate NRC Regional Office.
Sincerely,
?,
/
/ j' I'
Ly' f-M
,R.HfEfihggpelken,..;,/
, Director i
Enclosures:
1.
IE Information Notice No. 80-11 2.
List of IE Information Notices ~Recently Issued cc w/ enclosures:
.-J. M. Cu"an, SCE R. Dietch, SCE 8 0 0 3 2 5 0 15cl q c
SSINS fio. 6870 Accession No.:
UNITED STATES 7912190684 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 j
March 14, 1980 IE Information Notice No. 80-11 GENERIC PROBLEMS WITH ASCO VALVES IN NUCLEAR APPLICATIONS INCLUDING FIRE PROTECTI0ft 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 j
equipment that could fail.
l Licensees should review their fire protection system components to determine if the equipment identified in the Viking Recall Notice is in their facility.
If the identified equipment is installed in the fire protection system, then the modifications 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 whan 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 solenoid 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 en an active valve could prevent a system from performing its required safety function.
Some ASCO NP-1 solenoid valves are equipped with taas which s
~
this valve is equipped with ethylen by oils and greases.
To be used fo pipe threads of cutting oils." Car DUPLICATE DOCUMENT lubricants which do not contain oil Entire document previously entered into system under:
[
ANO i
No. of pages:
m m
_w+-
9
-w'-
1-P