ML18043A836
| ML18043A836 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 06/06/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| TASK-08-01.A, TASK-8-1.A, TASK-RR NUDOCS 7907190759 | |
| Download: ML18043A836 (3) | |
Text
Docket No. 50-255 c ~A2I:~TI ON NRC PDR.
Local PDR JRBuchanan
.TERA ACRS (16)
DKDavis*
. JUN 0 6 1979 ORB #2 Reading NRR Reading VStel r6 DEi sen hut BGrimes
- RVol lmer TJCarter WRusse l'-1
... OELD Mr. *David Bixel Nucl~ar Licensing Administrator Consumers Power Company 212 West Michigan Avenue Jackson,. Michigan 4~201
Dear Mr. Bixel:
OI&E. (3).
~ : D.LZiemann
- RDSilver HSmith GLajnas We are continuing our review <it'your October 2, 1978 submittal related to ~the generic issue of onsite power: _systems. .Ba~ed *on* our r:evfew we have found that additional information is needed to continue our review.
To*mairitain our review schedµle we request your reply within 45 days of the date of this letter..
Enc 1 osure :*
Request for Additional Information cc w/enclosure:
See next *page.
Sincerely,
'* *~.
I i:"\\~al 11illed 91
~
.
- zsern11nl!t Deon}ll J.,. *:*.
Dennis L.* Ziemann, Chief.
Operating~ Reactors Branch #2 : *.
D1vfs1on of Operating Reactors "t
, I OP'P'ICB~
SURNAMBi!>
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DATO:~
MlC P(>RM 318 (9-76) NRCM 0240
- u.a. G~VBRNMllNT PRINTING OP'... ICII! t 171 - Ill - 711
Mr. David Bixel cc w/encl osure:
M. I. Miller, Esquir~
Isham, Lincoln & Beale Suite 4200 One First National Plaza Chicago, Illinois 60670 Mr. Paul A. Perry, Secretary Consumers Power Company 212 West Michigan Avenue
- Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power *company 212 West Michigan Avenue Jackson, Michigan 49201 Myron M. Cherry, Esquire Suite 4501 One IBM Plaza Chicago, Illinois 60611 Kalamazoo Public Library 315 South Rose Street Kalamazoo, Michigan 49006 JUN b 6 1979
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. REQUEST FOR ADDITIONAL INFORMATION PALISADES PLANT DEGRADED GRID VOLTAGE
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1.*. Ih yoor re~pohse to position lf you state that detrimental minimum voltag~
. levels will only occur during a shutdown mode and, therefore, no limiting conditions of operation are necessary.
It is our position that a reactor trip while the grid is in a degraded state would be a situation in which the protective relays would have to operate correctly and that technical specifications for voltage protection are necessary. Therefore, please submit technical specification changes to comply with our June 3, 1977 letter. These changes should comply as close as possible to the Model Technical Specifications (MTS} and should also include the limiting con-ditions for operation, surveillance requirements, nominal set-points with minimum and maximum limits for first level voltage. protection (loss-of-voltage} as shown in the MTS.
- 2.
Please explain why your choice of a 3/3 coincident logic is acceptable from a safety standpoint (as contrasted to a 2/3 coincident scheme}.
Schematics of the proposed relaying circuits and types of relays being used are also requested.
- 3.
Will the proposed relays and other components of the circuit be seismically and environmentally qualified?
- 4.
Has an analysis been performed to detennine if the proposed 6 second time delay is of long enough duration to take into account the starting time and consequential voltage drops from large motors on the bus?