ML20002C505
| ML20002C505 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 05/11/1978 |
| From: | Skibitsky W CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8101100384 | |
| Download: ML20002C505 (2) | |
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Consumers L POWER Company U
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p ceneres orf.ces: sia west u.ca. gen 4..nue..secwson. uicn.gan 4emoi. Area coo. si7 7se.osso v
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May 11, 1978 jft rJ G
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C ru L1 Director, Nuclear Reactor Regulation Att: & Dennis L Ziemann, Chief Operating Reactors Branch No 2 US Nuclear Regulatory Co==ission Washington, DC 20555 DOCKET 50-155 - LICENSE DPR-o -
BIG ROCK POINT PLANT - RESPONSE TO DIESEL GENERATOR ALAR'4 AND CONTROL CIRCUITRY LETTER DATED AFRIL 12, 1978 By letter dated April 12, 1978 the staff responded to the Consumers Power Company letter of May 21., 1977 that dealt with the diesel generator alar: and control circuitry at Big Rock Point.
In the staff's letter, it was recom-mended that the alarm for the local emergency diesel generator control switch in the manual or off positions be relocated to an annunciator that clearly indicates that automatic start is blocked.
Consumers Power Company concurs with thi3 recommendation. The " control switch in manual or off position" contact vill be transferred from the annunciator labeled " emergency engine trou'.le" to the annunciator marked " emergency generator start /centrol failure."
This annunciator indicates that the diesel failed to start within its allotted starting time, or that the automatic starting control circuitry is unable to perform its intended function. With the diesel control switch in the " manual" or "off" position, the automatic start function is blocked; therefore, the alarm designation " diesel generator start / control" failure applies.
Additional information was requested regarding manual shutdown lockout relays in the diesel generator control scheme. The diesel generator at Big Rock j'
Point does not utili::e lockout relays in its control circuitry; therefore, it was not referenced in the previous response. All conditions that do render auto start inoperative, however, were addressed.
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Willia: S Skibitsky
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Senior Licensing Engineer i
CC: JGKeppler, USNRC
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j f o f / f f /) y REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
DISTRIBUTION FOR INCOMING MATERIAL 50-155 REC: ZIEMANN D L ORG: 445-SM8W5 W W O DOCDATE: 05/11/78 NRC CONSUMERS PWR DATE RCVD: 05/17/7:
DOCTYPE: LETTER NOTARI ZED: NO COPIES RECEIVED
SUBJECT:
LTR 1 ENCL 0 FURNISHING INFO CONCERNING SUBJECT FACILITY"S ALARM FOR LOCAL EMERGENCY DIESEL GENERATOR CONTROL SWITCH IN THE MANUAL OR OFF POSITIONS DE RELOCATED TO AN ANNUCIATOR THAT CLEARLY INDICATES THAT AUTOMATIC START IS BLOCKED.
PLANT NAME: BIG ROCK PT REVIEWER INITIAL:
XJM DISTRIBUTOR INITIAL: 4 00***************
DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ******************
DIESEL ALARM CIRCUITRY FOR DIESEL GENERATORS.
(DISTRIBUTION CODE AOO5)
FOR ACTION:
BR PMirr 7 EMANN**LTR ONLY(7)
INTERNAL:
REG FILk**LT ONLY(1)
NRC PDR**LTR ONLY(1)
I & E**L.TP NLY(2)
OELD**LTR ONLY(1)
MIFC**LTR ONLY(1)
HANAUER**LTR ONLY(1)
BENAROYA**LTR ONLY(1)
IPPOLITO**LTR ONLY(1)
EISENHUT**LTR ONLY(1)
SHAO**LTR ONLY(1)
BAER**LTR ONLY(1)
BUTLER **LTR ONLY(1)
EEB**LTR ONLY(1)
F.
ROSA **LTR ONLY(1)
T.
WAMBACH**LTR ONLY(1)
EXTERNAL:
LPDR'S CHARLEVOIX, MI**LTR ONLY(1)
ACRS CAT B**LTR ONLY(16)
/
DISTRIBUTION:
LTR 40 ENCL O CONTROL NBR: bIGP!7vuos' SI ZE: IP I
oooo*******************************
THE END P00R OR 1NAL
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