ML17264B033
| ML17264B033 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 09/29/1997 |
| From: | Mecredy R ROCHESTER GAS & ELECTRIC CORP. |
| To: | Vissing G NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17264B034 | List: |
| References | |
| NUDOCS 9710020014 | |
| Download: ML17264B033 (6) | |
Text
CATEGORY 1 REGULAT i INFORMATION DISTRIBUTIO STEM (RIDS) r ACCESSION NBR:9710020014 DOC.DATE: 97/09/29 NOTARIZED: NO
'FACIL:50=244 Robert Emmet Ginna Nuclear Plant, Unit 1,. Rochester G
AUTH.NAME AUTHOR AFFILIATION MECREDY-,R.C.
'Rochester Gas 6 Electric Corp.
RECIP.NAME-RECIPIENT AFFILIATION VISSING,G.S.
DOCKET 05000244 T
05000244 NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72).
SUBJECT:
Forwards LAR which proposes to revise TS to change allowable value for high steam flow input into LCO Table 3.3.2-1, Function 4d (main steam isolation).
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E NOTE TO ALL "RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD)
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AHD ROCHESTER GASANDELECWICCORPORATION
~ 89 EASTAVENUEiROCHESTER, N.Y. Id6d9-0001 AREA CODE7I6 546-2700 ROBERT C. MECREDY Vice President Hvcieor operations September 29, 1997 U.S. Nuclear Regulatory Commission Document Control Desk Attn:
Guy S. Vissing Project Directorate I-1 Washington, D.C. 20555
Subject:
Application for Amendment to Facility Operating License Change to Main Steam Isolation Setpoint (LCO Table 3.3.2-1, Function 4.d)
Rochester Gas &Electric Corporation R.E. Ginna Nuclear Power Plant Docket No. 50-244
Dear Mr. Vissing,
The enclosed license amendment request (LAR) proposes to revise the Ginna Station Technical Specifications to change the Allowable Value for the high steam flowinput into LCO Table 3.3.2-1, Function 4.d (main steam isolation).
This change is necessary due to setpoint analyses which determined that the current specified Allowable Value can only be met with an extremely low Trip Setpoint (i.e., below the re-set value ofthe installed bistables).
Consequently, to meet the specified Allowable Value, the bistables for high steam flowinput into LCO Table 3.3.2-1, Function 4.d would have to be lowered to a point at which they would never clear or re-set once the Trip Setpoint had been reached (which normally occurs at approximately 10% RTP).
RG&E has determined that the existing Allowable Value for this function was inadvertently not revised during a power uprate from 1300 MWtto 1520 MWtin the early 1970s.
Implementation of the proposed new Allowable Value corrects this error while allowing use ofthe existing Trip Setpoint for this function which is above the bistable re-set value. A minor clarification is also made to the Trip Setpoint.
Consequently, no plant modifications would have to occur as a result ofthis LAR.
,, 97i00200i4 970929 i,'s PDR.
ADQCK 05000244 P
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I RG&E is currently operating withthe bistables for the high steam flowinput in the tripped condition in order to meet technical specification requirements for operability ofLCO Table 3.3.2-1, Function 4.d. This is considered acceptable since the remaining inputs into LCO Table 3.3.2-1, Function 4.d (i.e., coincident safety injection and low T,Q are not met and the bistables are normally tripped once above 10% RTP. However, to help prevent an inadvertent actuation ofmain steam isolation during startup and shutdown activities when the bistables are normally not tripped, RGB'equests a high NRC priorityfor review and approval ofthis LAR. Please allow RG8.E 30 days for implementation ofthis LARupon NRC approval.
Very truly yours, Robert C. Mecr dy MDF$939 Attachments U.S. Nuclear Regulatory Commission Mr. Guy Vissing (Mail Stop 14B2)
PWR Project Directorate I-1 Washington, D.C. 20555 U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King ofPrussia, PA 19406 Ginna Senior Resident Inspector Mr. F. WilliamValentino, President New York State Energy, Research, and Development Authority Empire State Plaza Albany, NY 12223-1253
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