ML17341A645

Forwards Request for Addl Info Re Adequacy of Station Electrical Distribution Sys Voltages.Info Required within 60 Days

ML17341A645
Person / Time
Site:	Turkey Point
Issue date:	10/22/1981
From:	Varga S Office of Nuclear Reactor Regulation
To:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
References
NUDOCS 8112030729
Download: ML17341A645 (6)

Text

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NOV 1. 8 1991+I;)

1, 1981 u1~~~~1EN Docket Nos. 50-250

'0 and 50-251 Dr. Robert E. Uhrig,, Vice President Advanced Systems and Technology Florida Power and Light Company Post Office Box 529100 tIiami, Florida 33152

Dear IIr. Uhrig:

DISTRIBUTION ocket Fil e Local PDR ORB 1

Fi 1 e D. Eisenhut OELD OI8IE (3)

S.

Varga H. Grotenhuis C. Parrish NSIC TERA ACRS (10)

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Heltemes 1)HSc 14

'ie have completed our review of your June 10, 1981 submittal related to

-the adequacy of station electrical distribut Ion system voltages for the Turkey Point Plant Unit ttos.

3 and 4.

Ile find that we need the information identified in the enclosure to this letter in order to complete our review.

Please respond with the requested information within 60 days from the date of this letter.

Sincerely,

~i'girial Signed jtyf

Enclosure:

As stated Steven A. Varga, Chief Operating Reactors Branch No.

1 Division of Licensing cc:

See next page 8ii2030729 Sii022 i PDR ADOCK 05000250I P

PDR'RB 1

OFFICE $

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10/jP/81 DATE $

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USOPO: 1981~960

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Rober'c E. Uhrig Fl,.oneida,Power and Light Company CC:

Nr. Robert Lowenstein, Esquire Lowenstein,

newman, Reis and Axelrad 1025 Connecticut Avenue, N.M.

Suite 1214 llashington, D. C.

20036 Environmental and Urban Affairs Library Florida International University Niami, Florida 33199

,Nr. Norman A. Coll, Esquire

Steel, Hector and Davis

]400 Southeast. First.Hati,onal Bank Building Miami, Florida 33131 Nr. Henry Yaeger, Plant.Manager Turkey Point Plant Florida 'Power and Light 'Co'mpany P. 0.

Box 013100 Niami, Florida 33101 Nr., Jack Shreve Office of the Public Counsel Room 4, Holland'uilding Tallahassee,

.Florida 32304 Administrator

'Department of Environmental Regulation Power Plant Siting Section Sta'te of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 Resident Inspector Turkey Point nuclear Generating Station U. S; Muclear Regulatory. Commission Post Office Box 1207 Homestead, Florida

.33030

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ENCI OSURE REQUEST FOR ADDITIONAL INFORMATION (ROUHD 3)

TURKEY POINT UNITS 3 5 4 (TAC NOS.

12964 5 12965)

ADEQUACY OF STATION ELECTRICAL DISTRIBUTION SYSTEM VOLTAGES

. 1.

Does the start-up transformer of the adjacent unit serve as the second required offsite source.to the onsite distribution system as required by GDC-17?

2.

'Is the start-up transformer of otic unit adequate to simultaneously suppl'y minimum engineered safety features of one unit and safely shut down the other unit, without assistance from on-site generation?

3. If the -start-up transformers are not sized as described in question 82, then under what conditions are the cross-unit ties used?

4. It appears that the removable iso-phase bus generator links are part of the station features'hich would allow compliance with Regulatory Guide '1.93.

Can the 1'inks be removed and.'a unit backfed through the main and auxiliary transformers within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.or within the time required.to prevent fuel damage?

/

5.

Submit the minimum pick-up-, maximum drop-out, and nominal voltage ratings of the motor starter contacts.

If the starters are'energized by the plant's 120 volt electrical

system, then the voltage analysis'. must be extended to this voltage level.

6.

What is the minimum starting voltage required for the, 4kv and 460 volt 1E motors?

7.

What is the duration of the starting transient experienced when starting th'e largest lE motor as described in your December 18, 1980 letter?

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