ML19260D210
| ML19260D210 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/17/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 8002080114 | |
| Download: ML19260D210 (1) | |
Text
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.?, Sa athw, b, UNITED STATES NUCLEAR REGULATORY COMMISSION f #
t' R EGloN IV n
- 7 i ) 3 611 RY AN PLAZA DRIVE, SUITE 1000 o, % hy - '$-
ARLINGTON, TEX AS 76012 e...../
'f January 17, 1980 In Reply Refer To:
RIV Docket Nos.
50-445/IE Circular No. 80-01 50-446/IE Circular No. 80-01 Texas Utilities Generating Company ATTN:
Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 Gentlemen:
The enciesed IE Circular No. 80-01 is forwarded to you for information and, if applicable, necessary action in accordance to 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 contact this office.
Sincerely,,
ci,f,
h t
2
-Karl V. Seyfrit Director
Enclosures:
1.
IE Circular No. 80-01 2.
List of IE Circulars Recently Issued 1942 309 h
"ososo.,,I i Y
UNITED STATES SSINS No.:
6830 NUCLEAR REGULATORY COMMISSION Accessions No.:
OFFICE OF INSPECTION AND ENFORCEMENT 7912190644
'lASHINGTON, D.C.
20555 IE Circular No. 80-01 January 17, 1980 Page 1 of 1 SERVICE ADVICE FOR GENERAL ELECTRIC INDUCTION DISC RELAYS Alabama Power Company reported to the NRC on October 16, 1979 a potential problem with certain General Electric Company induction disc type protective relays.
A higher than normal pich-up value was caused by petroleum jelly lubricant which under high temperature conditions can migrate to the backstop.
At room 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 recommended that users determine whether relays meeting 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, follosed by any of the following two letter codes:
(a) Any first letter followed by H, J, K, L, or M; or (b) Tne letter combinations AN, BN, CN. DN, EN, DG, EG, FG, 1G, 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 apply G.E. Service A dvice 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 hTC Regional Office.
1942 310 Attachn Enclosu DUPLICATE DOCUMENT Entire document previously entered into system under:
ANO C3 No. of pages:
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