ML20052F565

Forwards Addl Info Re FSAR Round 1 Question 430.17 on Diesel Generator Load Sequencing Sys

ML20052F565
Person / Time
Site:	Catawba
Issue date:	05/06/1982
From:	Parker W DUKE POWER CO.
To:	Adensam E, Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 8205130192
Download: ML20052F565 (2)

Text

l Dune POWER COMPANY Powza UUH, DING 422 SouTu Caracu STHEET, CnAM14TTE, N. C. esa4a WI L LI A M O PAR F E R, J R.

V.cr PmEsicENT TE'. CPo+0N C; Am E A 704 May 6, 1982 **

e Mr. Harold R. Denton, Director g Office of Nuclear Reactor Regulation p ggygg U. S. Nuclear Regulatory Commission -

, Washington, D. C. 20555 2 g y.gggggy f y" ~

Attention: Ms. E. G. Adensam, Chief Licensing Branch No. 4 #%"E' Y [f 100 g

{ Re: Catawba Nuclear Station '

Docket Nos. 50-413 and 50-414

Dear Mr. Denton:

During a March 10, 1982 conference call, Mr. Jim Lazevnick, NRC/0NRR - Power Systems Branch, requested additional information regarding Catawba FSAR question 430.17. The requested infonnation is attached.

Very truly yours, s - , *

,/

. f .

William 0. Parker, Jr. /

ROS/php Attachment cc: Mr. James P. O'Reilly Mr. P. K. Van Doorn Mr. R. Guild Palmetto Alliance Mr. J. L. Riley Mr. H. Pressler ht)O l l

.5 G205130192 820506

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ADDITIONAL INFORMATION REGARDING FSAR ROUND 1 QUESTION #430.17

1. Overview description of the Catawba Nuclear Station's diesel generator load sequencing systems.

Each sequencing system is enclosed in two " double door" cabinets mounted on the floor, side by side, in the respective train related diesel engine tunnel .

(The tunnels are the passages which connect the auxiliary building with the diesel rooms.)

The internal sequencer logic is derived primarily by the use of Cutler Hammer brand electro-mechanical relays (Type M).

Other devices utilized for sequencer logic and operator interfaces (test-ing and reset functions) are as follows:

a) Cutler Hammer brand type E-30 switches.

b) Cutler Hammer brand type E-20 switches.

c) Cutler Hammer brand solid state timers type AE.

d) Agastat brand solid state timers (with electro-mechanical relay output) type SSC.

e) ITE brand instantaneous undervoltage relays type 27H.

2. Sequencer Reliability and Qualifications.

The Catawba diesel generator load sequencing systems are very similar in basic design and constituent parts to the McGuire Nuclear Stations sequencers.

The minor differences that exist between the two plants sequencers are due to:

a) Variations in mechanical systems.

b) Variations in electrical auxiliary power systems.

I c) State of the art components becoming available.

All equipment utilized in the construction of the diesel generator load se-quencers is qualified for use in Nuclear Safety Class lE applications. These equipment qualifications are in accordance with the Duke Power Company Design Engineering Department Quality Assurance Program as listed in the Quality Assurance Manual.

All material relating to equipment qualification and reliability is available for review or audit.

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