ML17250A540: Difference between revisions
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/I/I/I///IIII ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N,Y. 14649 LEON D. WHITE, JR. TCI.CPHONC VICE PRESIOCNT ARCA COOC 7ld 546-2700 September 3, 1980 Office of Nuclear Reactor Regulation Attention: Mr. Dennis.M. Crutchfield, Chief Operating Reactors Branch No. 5 U. S. Nuclear Regulatory Commission Washington, D.C. 20555 | /I/I/I///IIII ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N,Y. 14649 LEON D. WHITE, JR. TCI.CPHONC VICE PRESIOCNT ARCA COOC 7ld 546-2700 September 3, 1980 Office of Nuclear Reactor Regulation Attention: Mr. Dennis.M. Crutchfield, Chief Operating Reactors Branch No. 5 U. S. Nuclear Regulatory Commission Washington, D.C. 20555 | ||
Revision as of 11:38, 4 February 2020
| ML17250A540 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 09/03/1980 |
| From: | White L ROCHESTER GAS & ELECTRIC CORP. |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| TASK-08-01.A, TASK-8-1.A, TASK-RR NUDOCS 8009090513 | |
| Download: ML17250A540 (4) | |
Text
REGULATORY r "ORMATION DISTRIBUTION SYS "M (RIDS)
ACCESSION NBR: 8009090513 DOC DATE: 80/09/03 NOTARIZED: NO '. DOCKET FACIL:50-244 Robert Emmet
~
Ginna Nuclear Pl ant AFFIL'IATION P Unit ii Rochester G 05000244 AUTH INANE AUTHOR HHI TEE L. D ~ Rochester Gas L Electric Corp.
REC IP ~ iVAME RECIPIENT AFFILIATION CRUTCHFIELDPD ~ Operating Reactors Branch 5
SUBJECT:
Responds to NRC 800811 request for info. re generic review of degraded grid, voltage.All low-voltagegi25 volt ac Class IE buses are supplied from either uniterruptable power soUrce or regulated 480/125-volt g'NCL Q I transformers'ISTRIBUTION CODE: A DIBS COPIES RECEIYED:LiTR SIZE TITLE: Onsi te Emer gency Power Systems NOTES:1 copy:SEP Sect. Ldr. 05000244 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME Lfl'TR EN L ID LTTR ACTION: CRUTCHF-IELD 04 CODE/NAME'EN 7
INTERNAL: AEOD ISSUES BR13 ISC SYS BR 09 ILE 06 MPA 18 NRC PDR 02 OELD 17 OP EX EVALl BR11, ENCL'XTERNAL:
OR BR 12 POHER SYS BR 14 G FILE 01 ACRS 16 16 LPDR 03 NSIC 05 1
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TOTAL NUMBER OP COPIES REQUIRED: LTTR Pf ENCL; gj/
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/I/I/I///IIII ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N,Y. 14649 LEON D. WHITE, JR. TCI.CPHONC VICE PRESIOCNT ARCA COOC 7ld 546-2700 September 3, 1980 Office of Nuclear Reactor Regulation Attention: Mr. Dennis.M. Crutchfield, Chief Operating Reactors Branch No. 5 U. S. Nuclear Regulatory Commission Washington, D.C. 20555
Subject:
Degraded Grid Voltage, Generic Review
Dear Mr. Crutchfield:
In response to your August 11, 1980 request for additional information the following is provided for your use in completing your generic study.
All low-volta'ge, 125 volt, AC Class IE buses at. Ginna Station are supplied from either an uninterruptable power source (UPS) or from regulated 480/125 volt transformers. Thus these 125V IE buses are not susceptible to variations in offsite source voltage levels. In this way the reguirements of GDC-13 are met. The instrumentation and/or controls supplied by these IE buses will perform over their anticipated ranges during the offsite voltage ranges established in our December 6, 1979 report. For this reason, the 125 volt Class busses were not modeled in the Ginna interactive load flow program and no calculations were performed on this system.
Sincerely, L. D. Whi e, Jr.
POI5 5
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