ML19260D078
| ML19260D078 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 01/17/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Stampley N MISSISSIPPI POWER & LIGHT CO. |
| References | |
| NUDOCS 8002070359 | |
| Download: ML19260D078 (2) | |
Text
.
/
UNITED STATES l'
7, NUCLEAR REGULATORY COMMISSION
- i;I)g g 'Q /o,8 5
.E REGION ll G
101 MARIETTA ST., N.W., SUITE 3100 O
ATLANTA, G EORGIA 30303 g*****
JAN 171980 In Reply Refer To:
RII. mn M 16, 50-417 N,
Mississippi Power and Light Company Attn:
N. L.
Stampley Vice President of Production P. O. Box 1640 Jackson, Mississippi 39205 Gentlemen:
The enclosed IE Circular No. 80-01 is forwarded to you for information and if applicable necessary action in accordance to the attached Gencral 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,
~
~
c.;~n Q.
ames O'
Director
Enclosures:
1.
IE Circular No. 80-01 2.
List of Recently Issued IE Circulars 1937 175 80o2 ora 357 q
JAfi 17 Eso Mississippi Power and Light Company.
cc w/ enc 1:
C. K. McCoy e
Plant Manager Post Office Box 756 Port Gibson, Mississippi 39150
[
1937 176
UNITED STATES SSINS No.:
6830 NUCLEAR REGULATORY COMMISSION Accessions No.:
0FFICE OF INSPECTION 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 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 values to be higher than setpoint values.
General Electric (GE) laborat ary confirmed some higher than normal pickup values and recommended that users determine whether rel.3ys meeting the following criteria are in use at their facilities:
(1) Relay type:
IAC, IAV, JCR, 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 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 piace.
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 information regarding this matter contact the Director of the appropriate NRC Regional Office.
Attachment:
GE Service Advice 721-162.2 DUPLICATE DOCUMENT Entire document previously entered into system under:
1937 177
~) ? / 4 / 9 5 /o W aNO
[
No. of pages: