ML20197J726

Informs That Encl TS Bases 3.6.2,4.6.2,3.6.3 & 4.6.3 Are Being Revised to Reflect Previous Removal of Condenser Low Vacuum Scram Function from TS & Changes to EDG Ratings & Design Basis Load Limits.Supporting Info Re Changes,Encl

ML20197J726
Person / Time
Site:	Nine Mile Point
Issue date:	12/04/1998
From:	Mueller J NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20197J729	List: ML20197J726 ML20197K104
References
NMP1L-1387, NUDOCS 9812150195
Download: ML20197J726 (12)

Text

'

NiagarahMohawk' John H. Muehe' Phone: 315.349.7907 S:nior Vice President and Fax; 31s.34g.1321 l Chief Nuclear Officer e-mail: rnuellerj@nimo.com j December 4, 1998 NMP11. 1387 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 RE: Nine Mile Point Unit 1 Docket No. 50-220 DPR-63 Gentlemen:  ;

i Niagara Mohawk Power Corporation (NMPC)is revising the Bases for Nine Mile Point Unit 1 (NMP1) Technical Specifications (TSs). The changes are consistent with the NMP1 Updated Final Safety Analysis Report (UFSAR) and the current TSs.

The " Bases for 3.6.2 and 4.6.2 Protective Instrumentation" are being revised to reflect the previous removal of the Condenser Low Vacuum scram function from the TSs, as well as from the plant design. These Bases are further revised to include changes that correct and clarify the information regarding a Reactor Protection System (RPS) bypass feature.

The " Bases fer 3.6.3 and 4.6.3 Emergency Power Sources" are being revisd to reflect changes to the Emergency Diesel Generator (EDG) ratings, design basis load limits, anJ l loading profiles which resulted from the reconstitution of the EDG design basis loading analysis. These Bases are also being updated to include the current UFSAR references.

Attachment A to this letter contains the revised TS Bases pages.

/

Attachment B provides supporting information, including the reasons for the changes, j descriptions of the changes, and summaries of the evalustions which justified the changes.

Very truly yours, Jbhn H. Mueller 9812150195 981204 . Senior Vice President and PDR ADOCK 05000220 ' Chief Nuclear Officer P PDR k

JHM/CDM/sc Attachrnents Nme Mde Point Nuclear Stat on P0. Box 63, tycoming New York 13093-0063

Page 2 xc: Mr. H. J. Miller, NRC Re0i onal Administrator Mr.' S. S. Bajwa, Director, Project Directorate,1-1, NRR Mr. G. K. Hunegs, Senior Resident inspector Mr. D. S. Hood, Senior Project Manager, NRR Mr. J. P. Spath NYSERDA 286 Washington Avenue Ext.

' Albany, NY 12203 6399 Records Management i

l}

l l L

i I

l l

l.

l l

l l

i G

4 A

y v --og - e + m .-e y