ML19250C361

Forwards Request for Addl Info on Degraded Grid Voltage Determined During Review of 770722 Submittal Re Second Level of Undervoltage Protection for Engineering Safety Feature Loads.Proposal for Tech Specs Change Required

ML19250C361
Person / Time
Site:	Hatch
Issue date:	10/30/1979
From:	Ippolito T Office of Nuclear Reactor Regulation
To:	Whitmer C GEORGIA POWER CO.
References
TAC-10026, TAC-11262, TAC-12831, TAC-47044, NUDOCS 7911230294
Download: ML19250C361 (3)

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UNITED STATES

.E NUCLEAR REGULATORY COMMISSION g

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WASHINGTON, D. C. 20555 o

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October 30, 1979 a

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

Dear Mr. Whitmer:

We have corrpleted our review of your submittal dated July 22, 1977 related to a second level of undervoltage protection for ESF loads on Hatch Unit No.1.

In the course of our review we have determined that the additional information identified in the enclosure is required.

Further, we have determined that a proposed Technical Specification change for Hatch Unit No. 2 is required.

5 We request that the additional information as weil as a proposal for Hatch Unit No. 2 be submitted within 45 days of your receipt of this request.

Sincerely,

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Thomas Ippolito, Chief Operating Reactors Branch #3 Divisi.on of Operating Reactors

Enclosure:

Request for Additional Infomation cc w/ enclosure:

See page 2 7

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=y Mr. Charles F. Whitner

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Georgia' Power Company E+

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G. F. Trowbridge, Esquire

.?M Shaw, Pittman, Potts and Trowbridge 15 1800 M Street, N. W.

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Washington, D. C.

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7-Ruble A. Thomas TE Vice President

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Southern Services, Inc.

Sirmingham, Alabama 35202 Ozen Batum 3

P. O. Box 2625 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. Gutwa Georgia Power Company Engineering Department P. O. Box 4545 Atlanta, Georgia 30302 Appling County Pub'.fc Library

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Parker Street Baxley, Georgia 31413 Mr. R. F. Rogers U. S. Nuclear Regulatory Commission

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P. O. Box 710 Baxley, Georgia 31513 1387 265 f

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1 REQUEST FOR ADDITIONAL INFORMATION

' EDWIN I. HATCH NUCLEAR PLANT UNIT 1 DEGRADED GRID VOLTAGE 1.

The NRC letter of June 2,1977, position (1)(f) called for surveillance requirements for second level undervoltage monitors. Enclosure 2 of that letter provided Model Technical Specifications (MTS) to be followed as closely as possible. Modify your proposal to include a 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> channel check for these monitors.

2.

In your submi.tted proposal for surveillance requirement 4.9.A.6.C, the load breakers are in test position.

Your proposal also does not mention the > 5 minute requirement of the MTS.

It is the staff's-position, as shown -in Enclosure 2, 4.8.1.1.X.C, that the time require-ment and actual loading of the buses should be performed. These tests will confirm that the voltage transients from starting large motors will not trip the emergency buses spuriously. Comply with this criteria or provide additional justification to support your present submittal.

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