ML19260A409
| ML19260A409 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 10/31/1979 |
| From: | Dale L MISSISSIPPI POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-79-23, NUDOCS 7911210067 | |
| Download: ML19260A409 (1) | |
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MISSISSIPPI POWER & LIGHT COMPANY ll /
Helping Build Mississipin P. O. BOX 1640. JACKSON. MIS SIS SIP PI 39205 P.e ' e D y. TION D t. P A,e T SA E *. T Office of Inspection and Enforcecent October 31, 1979 l'.
S. Nuclear Regulatory Commission Region 11 101 Marietta Sutect, N.W., Su ite 3100 Atlanta, Georgia 30303 o
Attention:
Mr. J. P. O'Reilly, Director
Dear Sir:
SUBJECT:
Grand Gulf Nuclear Station 0260/0472/L.'.01.0/15521 Evaluation of IE Bulletin 79-23 AEC1-79 /123 Nnc IE Bullet in 79-23, " Emergency Diesel Generator Field Ixciter
. ransf orme r," e::prenes a c oncern rega rding error in t he wi ring of eme r-gency diesel generator f ield excit e r t ransformer s.
In the desir.n of the Grand dul f Nuclear Stat ica Unit s 1 and 2, the excit er t ranst orner wind ing cour:ec t ionr. are wye-wye not wye-dolta, as deu r ibed in the bulletin.
This eliminates any probica of circulating current 1: the secondary.
l'a r t.' of thts bulletir. r. quires field load operation testing of the c:ne r,:e n c y liesel gene rators for a duration not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
This testinf, will be addressed in the plant Technical Specifications.
In addi-tlon, load testing that will satisfy the requirements of this bulletin will be conducted prior to fuel load.
Yours truly, 1
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