ML20043H844
| ML20043H844 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 06/20/1990 |
| From: | Silver H Office of Nuclear Reactor Regulation |
| To: | Beard P FLORIDA POWER CORP. |
| References | |
| TAC-76945, NUDOCS 9006260512 | |
| Download: ML20043H844 (3) | |
Text
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UNITED STATES f
NUCLEAR REGULATORY COMMISSION W ASHINGTON, o. C. 20666 t
June 20, 1990 Occket No. 50-302 Mr. Percy M. Beard, Jr.
Senior Vice President, Nuclear Operations Florida Power Corporation ATTN: Manager, Nuclear Operations Licensing-P. O. Box 219-NA-21 Crystal River, Florida 32629 Dear Mr. Beard
$UBJECT: CRY $TAL RIVER UNIT 3 - HIGH ENERGY LINE BREAK (HELB) IN THE INTERMEDIATEBUILDING(TACNO.76945) i In your letter of June 15, 1990, you describe a problem you identified durin your recent HELB efforts, namely that the large main steam line break (MSLB)g in the intermediate building may not bound smaller breaks with regard to maximum temperature and duration in the building. A number of components associatedwiththemainsteamandfeedwaterisolationfunctionofprincipally the Emergency feedwater Initiation and Control System used to mitigate such breaks, are not qualified for the resultant temperature profiles.
Analyses are continuing which may resolve the problem but the interim actions you describe are intended to resolve the problem until the end of Refuel 8.
These actions include insultting certain equipment, which, combined with thermal lag calculations, will demonstrate continued operability of the components.
You state that evaluations in accordance with 10 CFR 50.59 have been performed and that operability of the equipment will not be jeopardized by the added insulation.
In this connection, you should also address the effect of insulation and any resultant increased temperature on the qualified life of the components involved In addition, for the interim period until Refuel 8 you intend to rely on calculationswhichshowthatanenvironmentforwhIchthecomponentsare qualified can be assured by taking credit for operation of the reliable (but not fully safety-grade) fire suppression sprinklers, which would be actuated by a small MSLB. To assure availability of the sprinklers you will require that the plant be placed in Mode 4 if the sprinklers are no,t operable for more than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
FPC has not yet selected a permanent fix from among various options available, but you have committed to implement such a fix before the end of Refuel 8 (subject to material delivery constraints) so that the plant will be in full conformance with 10 CFR 50.49 without reliance, on the fire sprinkler system. You state that the permanent modifications will be defined within the next several weeks and presented to the NRC by October 1 1990. Quarterly progress updates will be provided, and NRC approval for any, proposed schedule change will be requested.
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June 20, 1990 4
Based on the information and commitments discussed in your letter as summarized above, we have no objection to implementation of your interim solution until the end of Refuel 8.
This completes our efforts on TAC No. 76945.
Sincerely, Original signed by Harley Silver, Project Manager Project Directorate 11 2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation ec: See next page 1
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Mr. Percy M. Beard, Jr.
Crystal River Unit No. 3 Nuclear Florida Power Corporation Generating Plant cc:
Mr. A. H. Stephens State Planning and Development General Counsel Clearinghouse Florida Power Corporation Office of Planning and Budget MAC - A50 Executive Office of the Governor P. 0. Box 14042 The Capitol Building St. Petersburg, Florida 33733 Tallahassee, Florida 32301 Mr. P. F. McKee, Director Chairman Nuclear Plant Operations Board of County Commissioners y
Florida Power Corporation Citrus County P. O. Box 219-NA-2C 110 North Apopka Avenue Crystal River, Florida 32629 Inverness, Florida 32650 Mr. Robert B. Borsus Mr. Rolf C. Wide 11. Director Babcock & Wilcox Nuclear Operations Site Support Nuclear Power Generation Division Florida Power Corporation 1700 Rockville Pike, Suite 525 P.O. Box 219-NA-21 Rockville, Maryland 20852 Crystal River, Florida 32629 Senior Resident Inspector Mr. Gary L. Boldt Crystal River Unit 3 Vice President, Nuclear Production U.S. Nuclear Regulatory Commission Florida Power Corporation t
15760 West Powerline Street P. O. Box 219-SA-2C Crystal River, Florita 32629 Crystal River, Florida 32629 Regional Administrator, Region II U.S. Nuclear Regulatory Comission 101 Marietta Street N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Jacob Daniel Nash Office of Radiation Control Department of Health and Rehabilitative Services 1317 Winewood Blvd.
Tallahassee, Florida 32399-0700 i
Administrator Department of Environmental Regulation Power Plant Siting Section State of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 Attorney General Department of Legal Affairs The Capitol Tallahassee, Florida 32304 l