ML19256A843
| ML19256A843 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 01/12/1979 |
| From: | Gilleland J TENNESSEE VALLEY AUTHORITY |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7901160226 | |
| Download: ML19256A843 (1) | |
Text
~
TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 500C Chestnut Street Tower II JAN 121979 Director of Nuclear Reactor Regulation Attention:
Mr. S. A. Varga, Chief Light Water Reactors Branch No. 4 Division of Project Management U.S. Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Varga:
In the Matter of the Application of
)
Docket Nos. 50-327 Tennessea Valley Authority
)
50-328 In response to a verbal request by Don Lasher of the NRC staff during the telephone conversation of January 10, 1979, enclosed is additional information related to the seismic qualifica*.1:.n of the diesel engine driven emergency generator sets at the Sequayah Nuclear Plant.
Very truly yours, Nt ( CM
'J.
E. Gilleland Assistant Manager of Power Enclosure 7901160g %
k\\
An Equal Opportunity Employer
'CREkTO IS OF'ELECTRICAt.
POV/Ei SUP.Y SYSTEMS h
=m p
h POW.:y,YSTEMS DIVISION ~
POvytit Sv5rgvs Q:vtSION OF MO% SON-KNUDS5.N COVPANY.INC, 108 CELO POAO / P O f>041924 /ftOCKY MOUNT. NOdTH CA7tOUNA 27801/ U.S A.
TWX. Otos ??)C725 PHONE pt97977-2720 February 9, 1978 Tennessee Valley Authority U10C126, 400 Commerce Avenue Knoxville, Tennessee 37902 ATTENTION:
Mr.
D.
R. Patterson, Chief Mechanical Engineering Branch
SUBJECT:
Sequoyah Nuclear Plant Diesel Engine Driven Emergency Generator Sets Your Contract No. 71C61-92652, N2M-52 P.S.D.
I.W.O. No. 950
REFERENCE:
Your Letter Dated December 9th, 1977 (Serial No. 950C-I-0032)
Centlemen:
Tbis is to confirm that Power Systems Division has been in contact with your Mr. Hodges and Mr. Coleman in regard to the above refer--
~Page 4 of 22 of Exide's Technical R e,.p_o r t N o. OCC-12_
enced letter.
indicates that four events were monitornd_during _the seismic _t;51slin_g; He have marked up and enclosecT Basler's Drawing No. 9'OT8T3 0 0-910, Sheets 1 and 2, to indicate the four relay contacts monitored and reasons for monitoring:
A.
"Kl" main contact, field shutdown circuit.
Closing of this contact will result in field collapsing and voltage shutdown.
B.
Remote indicati'on for "Kl" contacts, TD1 (25 and 26). b Monitors the state of K1 contactor.
jup/W 3 (57 and 58). h 6 C.
Remote indication of "K4" contacts, TD1 r
Under standby or running conditions of the unit, relay K4 is de-energized, its energizing will cause' g Mty Y K1 to pick up and cause voltage shutdown.
D.
Jumper TB1-1 and TB1-44. Monitored to simulate the closure of speed switch contacts for field flashing.
.