ML19257C412
| ML19257C412 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay, Diablo Canyon |
| Issue date: | 01/17/1980 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Crane P PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8001290078 | |
| Download: ML19257C412 (1) | |
Text
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SUITE 202, WALNUT CREE K PLAZA WALPeJT CR E E K, CALIFORNI A 94596 January 17, 1980 Docket Nos. 50-133, 50-275 50-323 Pacific Gas and Electric Company 77 Beale Street San Francisco, California 94106 Attention: Mr. Philip A. Crane, Jr.
Assistant General Counsel Gentlemen:
The enclosed IE Circular No. 80-01 is forwarded to you for information and, if applicable, necessary action in accordence with the attached General Electric Company Service Advice 721-162.2. No written response to this Circular is required.
If you have any questions related to the subject, please con-tact this office.
Sincerely, pd-R. H. Engelken Director
Enclosure:
1.
IE Circular No. 80-01 2.
GE Service Advice 721-162.2 cc w/ enclosures:
W. Barr, PG&E W. Raymc.id, PG&E R. Ramsay, PG&E, Diablo Canyon E. Weeks, PG&E, Humboldt Bay E. 6. Langley, PG&E 189A. 057 8001290 d}[
UNITED STATES SSINS No.: 6830 NUCLEAR REGULATORY COM'11SSION Accessions No.:
OFFICE OF INSPECTION AND ENFORCEMENT 7912190644 WASHINGTON, D.C.
20555 January 17, 1980 IE Circular Mo. 80-01 SERVICE ADVICE FOR GENERAL ELECTRIC INDUCTION DISC RELAYS Alabama Power Company reported to the NRC on October 16, 1979 a ootential problem with certain General Electric Company induction disc type protective relays. A higher ein normal oick-up value was caused by petroleum jelly lubricant which under high temperature conditions can migrate to the backstop. At roon tenper-ature the lubricant can becone adhesive and cause pickup values to be higher than setpoint values.
General Electric (GE) latoratory confirmed sone higher than normal pickup values and reconnended that users detemine 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 nay not in all cases renove 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 ielays that fall within the above two criteria.
No written response to this Circular is required.
If you desire additional information regarding this natter contact the Director of the appropriate NRC Regional Office.
Attachment:
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