L-82-509, Forwards Info Re Adequacy of Station Electric Distribution Voltages,In Response to 821022 Telcon Request.No Single Failure Can Affect Both Circuits Simultaneously or Consequentially Such That Both Required Circuits Lost
| ML17341B505 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 11/16/1982 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| L-82-509, NUDOCS 8211220119 | |
| Download: ML17341B505 (6) | |
Text
'REGULATORY I RMATION DISTRIBUTION SYST (RIDS)
ACGBSSIQN NBR;8211220119 DOC ~ DATE: 82/11/16 NOTARIZED; NO DOCKET FACIL:50-250 Turkey Point Plant~ Unit 3i Florida."Power and Light C
05000250 50 251 Turkey Point Planti Unit 4~ Flor ida 'Power and Light C
05000251 AUTHINAME AUTHOR AFFII IATION UHRIGg R ~ E, Florida Power L.Light Co, REC Ip, NAME RECIPIENT AFFILIATION VARGAeS ~ AD Operating Reactors Branch
SUBJECT:
Forwai ds info re adequacy of station elec,tric dis.tribution voltages in.response to 821022 telcon.requests No single failure can -affect both circuits simultaneousl:y or consequential'ly such that both required circui:ts lost'ISTRIBUTION CODE:
A015S
.COPIES RECEIVED:LTR.ENCL lSIZE:
1 TITLE:
OR Submittal': Onsite Emer gency power System NOTES:
RECIPIENT ID CODE/NAME NRR ORB1 BC 01 INT~ERNAL NRR/DL/ORAB 12 NRR/DS I/PSB 14 RGN2 COPIES LTTR ENCL' 7
1 1
1 1
1 1
RECIPIENT ID CODE/NAME N
/ICSB 09 EG 04 RM/DDAMI/MIB 18 COPIES LTTR ENCL EXTERNAL: ACRS LPDR NSIC 16 03
'05 6
6 1
1 1
1 INPOgJ ~ STARNES NRC 'PDR 02 NTIS TOTAL NUMBER Of COPIES REQUIRED+
LTTR 24 ENCL 24
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X I4000, JUNO BEACH, FL 33408 FLORIDAPOWER & LIGHTCOMPANY November 16, 1982 L-82-509 Office of Nuclear Reactor Regulation
.Attention:
Mr. S. A. Varga, Chief Operating Reactors Branch 51 Division of Operating Reactors.
U. S. Nuclear Regulatory Commission Washington, D. C.
20555
Dear Mr. Varga:
Turkey Point Units 3
& 4 Docket Nos, 50-250 and 50-251 Adequacy of Station Electric Distribution S stem Volta es As. requested in a telephone conversation with members of the NRC staff on October 22, 1982, we have prepared a discussion of General Design Criteria 17 as it applies to Turkey Point Units 3
a 4.
This discussion is attached.
Should you or your staff have any additional questions on this subject, please contact us.
Very truly yours, o e t E. Uhrig Vice President Advanced Systems 6 Technology REU/PLP/js cc:
Mr. J. P. O'Reilly, Region II Harold F. Reis, Esquire o)>
8211220119 821116 PDR'DOCK 05000250 P'DR PEOPLE... SERVING PEOPLE
- l
Re:
Turkey Point Units 3 6 4 Docket No. 50-250, '50-251 Adequacy of Station El'ectric Distribution S stem Volta es
Response
to NRC statement on A'dequacy of Station'Electric Di;stribution System Voltage:
GDC17 received in.telephone conversation October 22, 1982.
'RC 'STATEHENT:
"The licensee is required to provide the'esults of a review to determine if any single event. or condition. exists in the PTP plant electrical system which could result in the simultaneous or consequential loss of both required offsite power circuits to the onsite distribution system and thus violating the requirements of GDC17."
FPL RESPONSE:
The.onsite electrical-'distribution system for each unit is supplied by two separate and independent offsite sources.
One required circuit for each unit is supplied via the unit's:start-up transformer.
The other required circuit is supplied by the adjacent unit's start-up transformer.,
Each start-up transformer is connected by. separate, independent highlines to separate busses in the,switchyard.
Each transformer is connected'o the unit's onsite..distribution system via separate cables and breakers.
No single failure can affect both circuits simultaneously or consequentially such that both.
required circuits are.lost.
Thus the requirements of GDC17 are met.
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