ML19290E033

Forwards Request for Addl Info Re Loss of Offsite Power Events.Requests Response within 90 Days

ML19290E033
Person / Time
Site:	Hatch
Issue date:	02/13/1980
From:	Ippolito T Office of Nuclear Reactor Regulation
To:	Whitmer C GEORGIA POWER CO.
References
TAC-10026, TAC-11262, TAC-12831, TAC-47044, NUDOCS 8003040040
Download: ML19290E033 (3)

Text

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UNITED STATES g

NUCLEAR REGULATORY COMMISSION

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February 13, 1980 Docket Nos. 50-321 and 50-366 Mr. Charles F. Whitmer Vice President - Engineering Gecagia Power Company P. O. Box 4545 Atlanta, Georgia 30302

Dear Mr. Whitmer:

We are currently reviewing the adequacy of the offsite power systems of nuclear power plants and in particular, the loss of offsite power events at your facility.

One aspect of this review concerns the history of experienced total and partial power outages and attendent degraded voltage or frequency conditions of the grid.

In our review of this matter we have drawn upon the information provided to us via Licensee Event Reports and followup letters which have been sent to us.

Our records do not indi~cate that you have experienced any loss of offsite power events either completely or partially.

Please review your experiences and, if any are identified, then report tnem in answer to this letter and furnish the related infomation as included in the enclosure.

Please provide your response for the Edwin I. Hatch Nuclear Power Plant Units Nos.1 and 2 to us within 90 days of the receipt of this letter.

Si ncerely, p

Chief Operating Reactors dranch #3 Division of Operating Reactors Encl osure:

Request for Additional Information 8 0 03 0 40 0'fo

.s Mr. Charles F. Whitner Georgia Power Conpany cc:

G. F. Trowbridge, Esquire Shrw, Pittman, Potts and Trowbridge l'0, M Street, N. W.

Wasnington, D. C.

20036 Ruble A. Thomas Vice President P. O. Box 2625 Southern Servi;es, Inc.

Birmingham,, Alabama 35202 Ozen Batum P. O. Box 262)

Southern Services, Inc.

Birmingham, Alabama 35202 Mr. William Widner Georgia Power Company Power Generation Department P. O. Box 4545 Atlanta, Georgia 30302 Mr. L. T. Gucwa Georgia Power Company Engineering Department P. O. Box 4545 Atlanta, Georgia 30302 Accling County Public Library Parker Street Baxley, Georgia 31413 Mr. R. F. Rogers U. S. Nuclear Regulatory Commission P. O. Box 710 Baxley, Georgia 31513

s REOUEST FOR ADDITIONAL INFORMATION A.

For losses of offsite pcwer where less than all offsite pcwer was lost:

1.

How many circuits to the offsite network are normally available and how many were lost during the event?

2.

What was the cause of the event?

3.

Why did the other lines not fail when some did fail?

4.

Was any voltage increase or decrease experienced just prior to or during the outage?.If so, p, lease give details, voltages reached, affects, etc.

5.

Was any frequency decay experienced just prior to or during the outage?

If so, please give details, lowest frequency reached, cecay rate, affects on equipment cperation, etc.

5.

How long was power unavailable from the circuit?

7.

Date of Event.

3.

For losses of all offsite power:

1.

How long was the power off? How long for partial recovery? Please give details.

2.

If turbine trip occurred, how soon after did 10 of offsite power occur?

3.

If power was recovered promptly (10 minutes or less), was it due to automati:

or manual actions?

4 Was any voltage increase or decrease experienced just prior to or during the outage? If so, please give details, voltages reached, affects, etc.

5.

Was any frequency decay experienced just prior to or during the outage?

If so, please give details, lowest frequency reached, decay rate, affects on equipment operation, etc.

5.' Date of Event.

O.

Were there any other loss of offsite power events cther than we have listed?

If so, please give details of eacn event.

.