ML19309E487
| ML19309E487 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/16/1980 |
| From: | Trimble D ARKANSAS POWER & LIGHT CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| 1-040-11, 1-40-11, NUDOCS 8004220471 | |
| Download: ML19309E487 (1) | |
Text
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ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 LLTTLE ROCK, ARKANSAS 72203 [501) 371-4000 April 16, 1980 1-040-11 s
Director of Nuclear Reactor Regulation ATTN:
Mr. R. W. Reid, Chief Operating Reactor Branch #4 U. S. Nuclear Regulatory Commission Washington, D. C. 20555
Subject:
Arkansas Nuclear One-Unit I Docket No. 50-313 License No. DPR-51 Followup Actions As A Result of The Crystal River - Unit 3 Event on February 26, 1980 (File:
1510)
Gentlemen:
Pursuant to the verbal request of your Mr. Guy Vissing, Arkansas Power &
Light Company provides the following clarification regarding the test for Arkansas Nuclear One - Unit I to show the effects of various single power supply failures. This letter supplements our response to Item 2 in our letter dated March 24, 1980.
An analysis of single power supply failures for the NNI-X and NNI-Y cabinets has been previously provided in our March 12, 1980 letter.
Subsequent to the A.C. power supply upgrade described in our March 24, 1980 letter, a test will be performed to verify the design of the NNI system.
The test will include a simulated single failure at the most likely location for the following loss of power events:
24 VDC NNI-X power, 24 VDC NNI-Y power, 118 VAC-X power, and 118 VAC-Y power. Also, testing will include verification of the power supply design modifica-tion.
Following completion of the test, a review will be done to determine its acceptability. The test procedure and results will te available for review by the NRC Resident Inspector.
Very truly yours, l
h v e.5 C d David C. Trimble Manager, Licensing DCT:DGM:nak 80042209y MEMBER MiOOLE SOUTH UTiuTIES SYSTEM