ML20195G881

Submits Rev to 860909 Application for Amend to Licenses DPR-57 & NPF-5 Revising Tech Specs to Add Throttling Requirement to Plant Svc Water Pumps at Low River Level,Per NRC Request.Vendor Also Encl

ML20195G881
Person / Time
Site:	Hatch
Issue date:	12/15/1987
From:	James O'Reilly GEORGIA POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20195G888	List: ML20195G881 ML20237C414
References
SL-3743, TAC-62127, TAC-62128, NUDOCS 8712210295
Download: ML20195G881 (5)

Text

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SL-3743 1847C X7GJ17-H600 P

December 15, 1987 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Hashington, D. C. 20555 PLANT HATCH - UNITS 1, 2 NRC 00CKETS 50-321, 50-366 -

OPERATING LICENSES DPR-57, NPF-5 REQUEST TO REVISE TECHNICAL SPECIFICATIONS:

. R[VER LE_ VEL i

Gentlemen:

, In accordance with the provisions oi' 10 CFR 50.90, as required by 10 CFR 50.59(c)(1), Georgia Power Company hereby proposes a change to the Plant Hatch Unit 1 and Unit 2 Technical Specifications, Appendix A to Operating Licenses DPR-57 and NoF-5.  !

4 The proposed change simply adds a throttling requirement to the [

plant service water (PSH) pumps at low river level and is submitted at L the request of the NRC. This change supplements the proposed Technical ,

Specifications revision pertaining to river level submitted to the NRC by i GPC on September 9, 1986. The revised Technical Specifications submitted on September 9,1986, based the allowable river level on the requirements for sate shutdown of the plant, rather than full-power operation.

The Plant Review Board and the Safety Review Board subcommittee have '

reviewed the proposad changes. Since this submittal adds a requirement to the September 9,1986, submittal, it h consistent with Item (ii) of the "Examples of Amendments that are Considered Not Likely to Involve i Significant Hazards Considerations" listed on page 14,870 of the April 6,

1983, issue of the Federal Reaister. The 10 CFR 50.92 evaluation contained in the previous submittal is still valid. *

'l Enclosure 1 provides a detailed description of the proposed changes i and the bases for the change request.

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U.S. Nuclear Regulatory Commission December 15, 1987 Page Two i

Enclosure 2 provides page change instructions for incorporating the I proposed changes into the Plant Hatch Unit I and Unit 2 Technical Specifications. The proposed changed Technical Specifications pages ,

follow Enclosure 2. Note that the throttling requirement was added to the proposed pages submitted on September 9, 1986, not to the current Plant Hatch Technical Specifications pages.

Encloture 1 provides documentation from our vendor on pump submergence requirements.

Paymen' of a filing fee is not required, since this submittal supplements our submittal of September 9,1986, in which the filing fee '

was enclosed.

In accordance with the requirements of 10 CFR 50.91, a copy of this [

1etter and all applicable enclosures will be sent to Mr. J. L. Ledbetter of the Environmental Protection Division of the Gcorgia Department of

Natural Resources.

Hr. Ja:ne; P. O'Reilly states that he is Senior Vice President of Georgia Pom.r Company and is authorizad to execute this oath on behalf of .

Georgia Power Company, and that to the best of his knowledge and belief, '

the facts set forth in this letter and enclosures are true.

GEORGIA POWER COMPANY By: ' Lt . . C t _

James P. O'Reilly C .

Sworn to and subscribed bet re me thtLJitJ day of December .  ;

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'/~ Notary PubliT.-  !

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Enclosures:

1. Basis for Change Request '

2. Page Change Instructions ,

3. Vendor Letter on Pump Submergence Requirements ,

c: (See next page.)

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U.S. Nuclear Regulatory Commission December 15, 1987 Page Three c: Georaia Power Comoany Mr. J. T. Beckham, Jr., Vice President - Plant Hatch G0-N00.HS U.S. Nuclear Requltiory Commission. Hashinaton. D.C.

Mr. L. P. Crocker, Licensing Project Manager - Hatch U.S. Nuclear Regulatory Commission. Region II Dr. J. N. Grace, Regional Administrator Mr. P. Holmes-Ray, Senior Resident Inspector - Hatch State of Georaia Mr. J. L. Ledbetter, Commissioner - Department of Natural Resources 1847C

i ENCL.0SURE 1 PLANT HATCH - UNITS 1, 2 NRC DOCKETS 50-321, 50-366 OPERATING LICENSES DPR-57, NPF-5 REQUEST TO REVISE TECHNICAL SPECIFICATIONS:

RIVER LEVEL BASIS FOR CHANGE RE00EST By letter dated September 9,1986, Georgia Power Company (GPC) submitted a proposed Technical Specifications change pertaining to river water level at Plant Hatch'- Unit 1 and Unit 2. The revised Technical Specif1-cations base the allowable river level on the safe shutdown requirements y of the plant.

The proposed Technical Specifications would require a minimum' level in .(

the pump well of 60.7 ft mean sea level (ms1), which corresponds to 31/2 f t of submergence for the plant service water (PSH) pumps. This level is more than adequate for the PSW pumps to meet their shutdown requirements which were the basis for the proposed Technical Specifications changa dated September 9, 1986. However, the pump vendor has indicated that A ft of submergence is advisable for rated flow operation (8500 gpm per pump) due to vortexing and net positive suction head (NPSH) consideratic.ns . Because of this, we have modified the proposed Technical Specifications. It should be noted that the PSH pumps generally are not run at 8500 gpm.

Throttling of the pumps will, therefore, . be made a Technical Specifications requirement. The revised Technical Specifications pages reflecting this change are presented in Enclosure 2. Note that the throttling requirement has been added to the proposed pages submitted with our September 9, 1986, letter.

1847C E-1 12/15/87 SL-3743 4

ENCLOSURE 2 PLANT HATCH - UNITS 1, 2 NRC DOCKETS 50-321, 50-366 OPERATING LICENSES DPR-57, NPF-5 BiOVEST TO REVISE TECHNICAL SPECIFICATIONS:

RIVER LEVEL PAGE CHANGE INSTRUCTIONS The proposed changes to the Plant Hatch Technical Specifications (Appendix A to Operating Licenses DPR-57 and NPF-5) would be incorporated as follows:

Remove Page Insert Pigg Unit 1:

3.5-11 3.5-11 Unit 2:

3/4 7-3 3/4 7-3 3/4 7-4 3/4 7-4 1847C E-2 12/15/87 SL-3743

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ENCLOSURE 3 VENDOR LETTER ON PUMP SV3ffRGENCE REOUIREMENTS I

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. ESCLOSURE 3  !

l NPSD. HATCH RECEIVED __ l p- ru  !

nus.arsee, dm ' jut. 241986 l 2601 Eam 34th Saeet ,, ,,,,, ,,, m . , ..n

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Chattanooga, Tennessee 37407 Phone: (615) 6291415 O TWX: 810 573 52' My,  ; ,

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July 21. 1986 *fl - % $bi ..

FlLt # NZX.b.?:$i SOUTMERN COMPANY SERVICES gpy pgp pg,. . . '

Post Office Box 2625 Bimingham, Alabama 35202 _

N- -- .- . - =- - . l ATTErlTION: Mr. William Garner

SUBJECT:

RHRSW. PSW, Stand By Service Water Pumps, Submergence Requirements

REFERENCE:

Letter dated July 21, 1986 Please refer to the attached sheet when adjusting the submergence ,

of the referenced pumps.

If I can be of further assistance please do not hesitiate to call.

Best Regards, JOHNS MN PUMP COMPANY Gerald O. Harrelson Nuclear Account Manager i GDH #b ATTACHMENT cc: JPC0 Distribution Tim Long A Duwon ofJchuton Punp,' General Vaks, Inc i

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GEORGIA POWER COMPANY PLANT E.I. HATO1

SUBJECT:

Pump Sutunergence July 21, 1986 i of Plant Service Water Pumps RHR Service Water Pumps Stand-BY Service Water Ptznps .

SERVICE EDEL S/N GPM HEAD SUBMERGENCE REQUIRED OVER ' " W BELL Plant Service Water 24 EC-3 Stg. GC-2751-54 *8500 *275* 48" W/0 Suction Umbmila NE-3565-68 40" W/0 Suction Urt:brella -

1. 7000 #327' 32" W/0 Suction Umbrella 24" W/ Suction U:nbrella RHR Service Water 18 DC-7 Stg. GC-2755-58 *4000 *955' 35" NE-3561-64 #3500 #1036 24" m M

Stand-By Service Water 12 EMC-3 Stg. NG-2273 *700 #231.5 12" E

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E i FEDUCED FLOW L

THE REDUCED FLOW AND SUBERGENCE REFERENCED ABOVE SHOULD NOT REDUCE THE SERVICE LIFE OF YOUR PJMPS.

FURTHER REDUCTION IN SU8 MERGENCE PERIODICALLY SHOULD NOT CAUSE CATASTROPHIC FAILURE BUT WILL REDUCE THE SERVICE LIFE SCIENTIFICALLY.

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