ML20198H970

Discusses Plant Protection Against Dynamic Effects of Loca. Based on Evaluation,Nrc Find Util SW Piping Operability Determination to Be Acceptable

ML20198H970
Person / Time
Site:	Crystal River
Issue date:	12/22/1997
From:	Raghavan L NRC (Affiliation Not Assigned)
To:	Richard Anderson FLORIDA POWER CORP.
References
TAC-M96604, NUDOCS 9801140010
Download: ML20198H970 (3)

Text

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Deconber 22, 1997

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Mr. Roy A. Anderson

> " ~ Senice Vice President Nuclear Operations Florida Power Corporation ATTN: Manager. Nuclear Licensing Crystal River Energy Complex (SA2A) 15760 W. Power Line Street Crystal River,. Florida 34428-6708

SUBJECT:

CRYSTtt RIVER NUCLEAR GENERATING PLANT UNIT 3 - PROTECTION DYNAMIC EFFECTS OF LOCA - REQUEST FOR ADDITIONAL INFORMATIO (TAC NO. M96604)

Dear Mr. Anderson:

l By letter dated December 13, 1997. you informed us of your reevaluation of potential dynamic' effects on the service water (SW) system Your piping letter following a l loss-of-coolant-accident (LOCA) of the pressurizer surge line.

indicates that discharging fluid from a postulated pressurizer surge line rupture with a potential jet impingement cone angle of 30 F. would interacta with a segment of SWYou piping per formed an inelastic analysis, and determined that allowable stresses.

the SW piping is operable based on the guidance provided in theofU.S.

On the basis yourNuclear Regulatory Commission Generic Letter 91-18 Revision 1. evaluation, w Please note that your determination may be a subject of futureYou also indica inspection / audit.

resolution for the SW pipe stress non-conformance by May 1998.

Please note that General Design Criterion (GDC) 4 requires " .. structures.

systems, and components ,uding the effects [important of missiles, pipeto Your letter of December 13, 1997 appears to address safety]

whipping, and shall be ap discharging fluids..."

only SW piping and it is not clear whether you have evaluated the dynamic effects of a pressurizer surge line LOCA on any other systems and components t t in the area. We consider your compliance with the GDC as item D-58, " Design requirements for Dynamic We request LOCA your Effects."part response as expeditiously as possible consistent with your restart schedule.

If you have any questions regarding this matter. please write or call me at .

(301) 415-1471. Sincerely, Origimi signed L. Raghavan. by:t Manager Pro,)ec I gy Project Directorate 11-3 Q@ M h @ h7 ,

Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Dockel No. 50-302 cc: See next page

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• • • • • g December 22, 1997 Mr. Poy A. Anderson Senior-Vice President Nuclear Operations Florida Power Corporation ATTN: Manager. Nuclear Licensing Crystal River Energy Complex (SA2A) z 15760 W. Power Line Street Crystal River. Florida 34428-6708

SUBJECT:

CRYSTAL RIVER NUCLEAR GENERMING PLANT UNIT 3 - PROTECTION AGAINST DYNAMIC EFFECTS OF LOCA - RE0lJEST FOR ADDITIONAL INFORMATION (TAC C. M96604)

Dear Mr. Anderson:

By letter dated December 13. 1997. you informed us of your reevaluation of potential dynamic effects on the service water (SW) system piping following a loss-of-coolant-accident (LOCA) of the pressurizer surge line. Your letter indicates that discharging fluid from a postulated pressurizer surge line  ;,

rupture wtth a potential jet impingement cone angle of 30 F. would interact with a segment of SW piping, and result in SW pipe stresses greater than the allowable stresses. You performed an inelastic anal,ysis, ard determined that the SW piping is operable based on the guidance provided in the U.S. Nuclear Regulatory Commission Generic Letter 91-18 Revision 1. On the basis of your ,

evaluation, we find your SW piping operability determination to be acceptable.

Please note that your determination may be a subject of future inspection /dudit. You also indicated that you will inform us of your proposed resolution for the SW pipe stress non-conformance by May 1998.

Please note that General Design Criterion (GDC) 4- requires "... structures, systems, and components [important to safety) shall be appropriately protected against dynamic effects including the effects of missiles, pipe whipping, and discharging fluids. . ." Your letter of December 13, 1997 appears to address only SW piping and it is not clear whether you have evaluated the dynamic "fects of a pressurizer surge line LOCA on any other systems and components

... the area. We consider your. compliance with the GDC as part of yovr restart item D-58 " Design requirements for Dynamic LOCA Effects." We request your response as expeditiously as po:sible consistent with your restart schedule.

If you have any questions regarding this matter, please write or call me at (301) 415-1471.

Sincerely.

-.bA h ,

L. Raghavan. Project Manager Project Directorate 11-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket No. 50-302 cc: See next page

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l 2.

Mr. Roy A. Anderson CRYSTAL RIVER UNIT NO. 3 Florida Power Corporation W:

Mr. R. Alexander Glenn Corporate Counsel Mr. Robert E. Grazio, Director Florida Power Corporation Nuclear Regulatory Affairs (SA2A)

MAC-A5A Florida Power Corporation P.O. Box 14042 Crystal River Energy Complex St. Petersburg, Florida 33733-4042 15760 W. Power Line Street Mr. Charles G. Pardee, Director Nuclear Plant Operations (NA2C) Senior Resident inspector Florida Power Corporation Crystal River Unit 3 Crystal River Energy Complex U.S. Nuclear Regulatory Commission 15760 W. Power Line Street S745 N.' Tallahassee Road

, . Crystal River, Florida 34428-6708 Crystal River, Florida 34428 Mr. Bruce J. Hickle, Director Mr. John P. Cowan Director, Restart (NA20) Vice President, Nuclear Production Florida Power Corporation (NA2E)

Crystal River Energy Complex Florida Power Corporation 15760 W. Power Line Strcat Crystal River Energy Complex Crystal River, Florida 34428-6708 15760 W. Power Lirie Street Jrystal River, Florida 34428-6708 Mr. Robert B. Borsum Framatome Technologies Inc. Mr. James S. Baumstark 1700 Rockville Pike, Suite 525 Director, Quality Programs (SA20)

Rockville, Maryland 20852 Florida Power Corporation Crystal River Energy Complex Mr. Bill Passetti 15760 W. Power Line Street Office of Radiation Control Crystal River, Florida 34428-6708 Department of Health and Rehabilitative Services Regional Administrator, Region 11 1317 Winewood Blvd. U.S. Nuclear Regulatory Commission Tallahassee, Florida 32399-0700 61 Forsyth Street, SW., Suite 23T85 Atlanta, GA 30303-3415 Attorney General Department of Legal Affairs Mr. Kerry Landis The Capitol U.S. Nuclear Regulatory Commission Tallahassee, Florida 32304 61 Forsyth Stteet, SW., Suite 23T85 Atlanta, GA 30303-3415 Mr. Joe Myers, Director Division of Emergency Preparedness Department of. Community Affairs 2740 Centerview Drive Tallahassee, Florida 32359-2100 Chairman Bcard of County Commissioners Citrus County 110 North Apopka Avenue Iverness, Florida 34450-4245

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