ML19257C462
| ML19257C462 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 01/17/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Andognini G BOSTON EDISON CO. |
| References | |
| NUDOCS 8001290165 | |
| Download: ML19257C462 (1) | |
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%,*****,o KING OF PRUSSIA, PENNSYLVANIA 19406 Docket No. 50-293 JAN 171980 Boston Edison Company M/C Nuclear ATTN:
Mr. G. Carl Andognini, Manager Nuclear Operations Department 800 Boylston Street Boston, Massachusetts 02199 Gentlemen:
The enclosed 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,
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VM Boyce H. Grier Director
Enclosures:
1.
IE Circular No. 80-01 2.
List of Recently Issued IE Circulars CONTACT:
S. D. Ebneter (215-337-5296) cc w/encls:
P. J. McGuire, Pilgrim Station Manager 1839 204 001290 t6ts-3
ENCLOSURE 1 UNITED STATES SSINS No.:
6830 NUCLEAR REGULATORY COMMISSION Accessions No.:
0FFICE OF INSPECTION AND ENFORCEMENT 7912190644 WASHINGTON, D.C.
20555 IE Circular No. 80-01 Date:
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 pick-up value was caused by petroleum jelly lubricant which under high temperature conditions can migrate to the backstop.
At room temperature 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 Jate code (which is printed on a 3/4" x 3/8" sticker affixed
.o the relay cradle) has a numbei 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 combinations 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 apply G.E. Service Advice 721-162.2 (Attachment A) to all relays that fall within the above two criteria.
No written response +.o this Circular is required.
If you desire additional information regarding this matter contact the Director of the appropriate NRC Regional Office.
Attachment:
Attachment A E
DUPLICATE DOCUMENT Entire document previously entered into system under:
18N205 MO6D
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