ML19256F042
| ML19256F042 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/17/1979 |
| From: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| IEB-79-23, NUDOCS 7911210030 | |
| Download: ML19256F042 (1) | |
Text
TED TEXAS UTILITIES GENERATING COMPANY 2001 HRYAN TOWER = DALIAS.TELW 75201 al c^*v October 17, 1979
"'Je J.'.r." ~" 'lT TXX-3056 Mr. Karl V. Seyfrit, Director U. S. Nuclear Regulatory Commission Region IV RIV 611 Ryan Plaza Drive, Suite 1000 Docket Nos. 50-445/IE Bulletin No. 79-23 Arlington, Texas 76012 50-446/IE Bulletin No. 79-23 COMANCHE PEAK STEAM ELECTRIC STATION 1981-83 2300 MW INSTALLATION RESPONSE TO NRC IE BULLETIN 79-23 FILE N0:
10115
Dear Mr. Seyfrit:
In response to IE Bulletin No. 79-23, we offer the following:
1.
The CPSES Emergency Diesel Generators (EDG's) have the generator grounded through c 25KVA neutral grounding transformer with 2.2 ohms of resistance connected in the secondary.
The metering and control transformer consists of two sets of potential transformers each connected open delta on the primary, not grcunded.
The regulation transformer consists of three transformers connected ungrounded wye.
With the above described connection, the CPSES installation will not have a problem with circulating currents between the generator ground and the potential transformers and regulating transformers.
2.
The full load operation test of the EDG's shall be performed in accordance with section 14, table 14-2-2 (sheet 34 of 60) of the FSAR.
These tests shall be completed prior to fuel load.
Should you have any other questions, please advise.
Very truly yours, y
RJG:df cc:
U. S. Nuclear Regulatory Commission l j j'Ij
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Office of Inspection and Enforcement Division of Reactor Operations Inspection Washington, D. C.
20555 7911210
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