ML18043A230

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Responds to NRC 780817 Request for Review of Initial Evaluation of Eight SEP Topics.No Errors Identified During Review.Review Rept Encl
ML18043A230
Person / Time
Site: Palisades, Big Rock Point  File:Consumers Energy icon.png
Issue date: 10/24/1978
From: Hoffman D
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To: Ziemann D
Office of Nuclear Reactor Regulation
References
TASK-02-04.A, TASK-03-10.C, TASK-04-03, TASK-05-09, TASK-06-07.A2, TASK-06-07.D, TASK-07-01.B, TASK-17, TASK-2-4.A, TASK-3-10.C, TASK-4-3, TASK-5-9, TASK-6-7.A2, TASK-6-7.D, TASK-7-1.B, TASK-RR NUDOCS 7810270075
Download: ML18043A230 (2)


Text

consumers Power company General Offices: 212 West Michigan Avenue, .Jackson, Michigan 49201

  • Area Code 517 788-0550 October 24, 1978 Director, Nuclear Reactor Regulation Att: Mr Dennis L Ziemann, Chief Operating Reactors Branch No 2 US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 - LICENSE DPR ~ALISADES PLA1TT -

DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT The NRC staff requested Consumers Power Company to review the staff's initial evaluation of eight SEP topics in a letter dated August 17, 1978. The topics reviewed are listed below:

III-lOC Surveillance Requirements on BWR Recirculation Pumps and Discharge Valves IV-lA Operation With Less Than All Loops in Service IV-3 BWR Jet Pump Operating Indications V-9 Reactor Core Isolation Cooling System VI-7.A. 2 Upper Plenum Injection VI-7D Long-Term Cooling Pressure Failures VTI-1.B Trip Uncertainty and Setpoint Analysis Review of Operating Data Base XVII Operational Q,A. Program No errors were identified during our review. However, topic IV-L4. (Operation With Less Than _J\.ll Loops in Service) calls for an analysis of the thermal-hydraulic conditions of N-1 loop operation during ECCS for our Big Rock Point Plant. This analysis, along with other supporting documentation, is attached.

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2 Consumers Power Company concludes that operation with one loop out of service is fully justified at Big Rock Point based on the existing safety analysis and our administrative procedures. We further conclude that staff approval of these analyses should not be required prior to operation in this mode for any length of time.

David P Hoffman (Signed)

David P Hoffman Assistant Nuclear Licensing Administrator CC: JGKeppler, USNRC

Enclosures:

(1) Consumers Power Company Statement (2) GE Single Loop LOCA Analysis (3) Operation of the Big Rock Point Reactor With One Loop Out of Service - Impact on MCHFR Limits