ML19257C420
| ML19257C420 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 01/17/1980 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| References | |
| NUDOCS 8001290090 | |
| Download: ML19257C420 (1) | |
Text
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NUCLEAR REGULATORY COMMISSION c c REGION V e"[
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- ,,,e WALNUT CR EE K, CALIFORNI A 94596 January 17, 1980 Docket No. 50-312 Sacramento Municipal Utility District P. O. Box 15830 Sacramento, California 95813 Attention: Mr. John J. Mattimoe Assistant General Manager Gentlemen:
The enclosed IE Circular No. 80-01 is forwarded to you for information and, if applicable, necessary action in accordance with the attached General Electric Company Service Advice 721-162.2.
No written response to this Circ Jlar is required.
If you have any questions related to the subject, please con-tact this office.
Sincerely, v6[L R. H. Engelken Director
Enclosure:
1.
IE Circular No. 80-01 2.
GE Service Advice 721-162.2 cc w/ enclosures:
R. J. Rodriguez, SMUD L. G. Schwieger, SMUD 1es;L216 p
soo12eo 6,R;
UNITED STATES SSIMS No.: 6830 NUC. EAR REGULATORY COMMISSIO'l Accessions No.:
0FFlcF 0F INSPECTI0fl AND ENFORCEMENT 7912190644 WASHINGTON, D.C.
20555 January 17, 1980 IE Circular No. 80-01 SERVICE ADVICE FOR GENERAL ELECTRIC INDUCTION DISC RELAYS Alabama Power Company reported to the NRC on October 16, 1979 a notential problem with certain General Electric Company induction disc type protective relays. A higher than normal oick-up value was caused by petroleum jelly lubricant which under high temperature conditions can migrate to the backstop. At roon temper-ature the lubricant can become adhesive and cause pickup values to be higher than setpoint values.
General Electric (GE) laboratory confirmed some higher than normal pickup values and recomended that users determine whether relays neeting the following criteria are in use at their facilities:
(1) Relay type:
IAC, IAV, ICR, or IJCV, AND (2) The relay date code (which is printed on a 3/4" x 3/8" sticker affixed to the relay cradle) has a number less than 50, followed by any of the following two letter codes:
(a) Any first letter followed by H, J, K, L, or M; or (b) The letter conbinations AN, BN, CN, DN, EN, DG, EG, FG, GG, HG, JG, KG, LG or MG.
For example, 31GK would be considered, while 50 GK or 23HN would not be considered.
Experience has shown that the cleaning procedure recommended in GE Service Advice 721-162.1 may not in all cases remove all of the petroleum jelly which is lodged in place.
Based on the above, licensees are advised to aoply G.E. Service Advice 721-162.2 (Enclosure A) to all relays that fall within the above two criteria.
No written response to this Circular is required.
If you desire additional information regarding this matter contact the Director of the appropriate NRC Regional Office.
Attachment:
Enclosure A DUPLICATE DOCUMENT Entire document previously entered into system under:
ANO No. of pages: