ML19257C406
| ML19257C406 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 01/17/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Millen C PUBLIC SERVICE CO. OF COLORADO |
| References | |
| NUDOCS 8001290069 | |
| Download: ML19257C406 (1) | |
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STATE January 17, 1980 Docket No. 50-267 Public Service Company of Colorado AITN:
Mr. C. K. Millen Senior Vice President P. O. Box 840 Denver, Colorado 80201 Gentle'ren:
The enclosed II Circular No. 80-01 is forwarded to you for infornation and, if applicable, necessary action in accordance to the attached General Electric Conpany Service Advice 721-162.2.
No written response to this Circular is required.
If you have any questions related to the subject, please centact this office.
Sincerely, -
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i Karl V. Seyfrit-Director j
Enclosures:
1.
IE Circular No. 80-01 2.
List of IE Circulars Recently Issued cc:
D. W. Warembourg, Nuclear Production Manager Fort St. Vrain Nuclear Station P. O. Box 368 Platteville, Colorado 80651 L. 3 rey, Manager, Qualit/ Assurance 18M. 044 8001290 66
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 January 17, 1980 Page 1 of 1 SERVICE ADVICE FOR GENERAI 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 temper-ature the lubricant can become adhesive and cause pickup ulues 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 5_0, followed by any of the follc aing 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 (Enclosure A) to all relays that fall within the above two criteria.
No written response to this Circular is required.
If you desire additional inforcatica regarding this matter contact the Director of the appropriate NRC Regional Office.
Attachment:
g DUPLICATE DOCUMENT Enclosure A Entire document previously entered into s stem under:
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