ML20043H796
| ML20043H796 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 06/21/1990 |
| From: | Silver H Office of Nuclear Reactor Regulation |
| To: | Beard P FLORIDA POWER CORP. |
| References | |
| 76799, NUDOCS 9006260462 | |
| Download: ML20043H796 (3) | |
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UMTED STATES-
- E NUCLEAR REGULATORY COMMISSION
~h WASHINGTON, D. C. 20085 June 21, 1990 Docket No.:50-302 Mr. Percy M. Beard, Jr.
Senior Vice President.
Nuclear Operations Florida-Power Corporation ATTN: Manager, Nuclear Operations Licensing P 0.-Box 219-NA-21 Crystal River, Florida 32629 i
Dear Mr. Beard:
SUBJECT:
CRYSTAL RIVER UNIT 3 - REACTOR BUILDING FLOODING (TAC NO. 76799)
~By letters dated May 17, June 4, and 15, 1990 and LER 90-005, you identified a problem with flooding of a number of instruments in the reactor' building (RB) which are used to mitigate desig'n basis accidents, and proposed to resolve that problem on an interim basis by imiting the amount of water drawn from the borated water storage tank in the event of.a loss-of-coolant accident (LOCA). Switchover from injection mode'to recirculation mode will be based on an RB. level which will provide adequate pump not positive suction head, yet avoid flooding the instru-ments in question. Time for operator action to initiate switchover will be at L
least 10 minutes. An alarm will be added as a backup to the procedurally-required
-operator action, and tha quality and reliability of the level instruments is in accordance with Category 1 of Regulatory Guide 1.97. Control room dose will be below Standard: Review Plan guidelines assuming reasonable iodine removal efficiency (75' percent) by charcoal adsorbers in the auxiliary building venti--
~ 1ation system, and pH:in large-break LOCAs will be satisfactory. You have performed an evaluation in accordance with 10 CFR 50.59 and state that there u
are no unresolved safety questions.
You have completed plant modifications, procedure revisions, and operator training necessary to implement-the interim solution, and have committed to continuetomeetthelimitingcondit1onsofTechnicalSpecification(TS)3/47.8
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until permanent resolutiert of the problem is implemented. We assume that this commitment applies also to surveillance requirements of this TS, as well as to the requirements of TS 3.3.3.6 as they apply to the RB level instruments.
You committed to complete implementation of the pemanent resolution of this problem by the end of Refuel 8, subject to material delivery constraints.
The permanent. solution will return the time after the accident for operator action for all break scenarios to previous values (about 20 minutes to initiate switchover in a large-break LOCA). You stated that you will infom us of the details of your permanent fix by October 1,1990, provide quarterly updates on l
the status of this matter, and seek NRC approval for any schedule changes.
9006260462 900621
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Mr. P.M. Beard June 21, 1990-In regard to the possible problem of RB spray pH in small. break LOCAs, which was:also discussed in the above letters, you have stated that-this issue is not
.related to the flooding problem. Therefore, we await early submittal of your report on this matter.
Based on the information and comitments discussed in your letters as sumarized 7
-above, we have no objection to implementation of your interim solution until
'the end of Refuel 8.
This completes our efforts on TAC No. 76799.-
i Sincerely, t
Original signed by t
Harley Silver,' Project Manager Project Directorate 11-2 Division of Reactor Projects. I/II Office of Nuclear Reactor Regulation-cc: See next page' i
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Document Name:' CR3 REACTOR BUILDING FLOODING
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Mr. Percy M. Beard, Jr.
Crystal River Unit No. 3 Nuclear Florida Power Corporation Generating Plant ec:-
Mr. A. H. Stephens State Planning and Development i
General Counsel Clearinghouse Florida Power Corporation Office of Planning and Budget MAC - A5D Executive Office of the Governor-P. O. 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 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. Borsum Mr. Rolf C. Widell, Director Babcock & Wilcox Nuclear Operations Site Support Nuclear Power Generation Division Florida Power Corporation i
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 15760 West Powerline Street P. O. Box 219-SA-2C Crystal River, Florida 32629 Crystal River, Florida 32629 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 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 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