ML19339A334
| ML19339A334 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 10/17/1980 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| References | |
| NUDOCS 8011030604 | |
| Download: ML19339A334 (3) | |
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,f*# "' % g UNITED SThTES NUCLEAR REGULATORY mMMISSION g
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WASHINGTON, D. C. 2uoS k
October 17, 1980 o****
Docket No. 50-335 Dr. Robert E. Uhrig, Vice President Advanced Systems and Technology Florida Power and Light Company P. O. Box 529100 Miami, Florida 33152
Dear Dr. Uhrig:
SUBJECT:
RESPONSE TO STAFF QUESTIONS ON ST. LUCIE NATURAL CIPCULATION C00LDOWN EVENT
References:
(1) Letter, Uhrig to Novak, "St. Lucie Unit 1; Docket No.
50-335; Natural Circulation Cooldown" L-80-227, dated August 25, 1980.
(2) Letter, Uhrig to Novak, "St. Lucie Unit 1; Docket No.
50-335; Natural Circulation Cooldown" L-80-306, dated September 16, 1980.
(3) Letter, Novak -to Uhrig, dated July 8,1980.
The staff is reviewing your responses, provided in References 1 and 2, '.o Questions 1, 4 and 5 of our Reference 3 request for additional inforr.ation regarding the June 11, 1980 St. Lucie Natural Circulation Cooldown Event.
As a result of our review to date, we do not believe that your response to Question 1 fully addresses our concerns.
You are requested to provide the information identified in the enclosurb within 30 days of receipt of this letter.
Sincerely, Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Enclosure:
Response to Question 1 cc w/ enclosure: See next page 8011 080 [()'[:
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Flcrida P;wer & Light Company.
i cc:
l Robert Lowenstein, Tsquire Mr. Jack Shreve Lowenstein, Newman, Keit, & Axelrad Office of the Public Counsel 102S Connecticut Avenue, N.W.
Room 4, Holland Bldg.
Washington, D.C.
20036 Tallahassee, Florida 32304 Nonnan A. Coll, Esquire McCarthy, Steel, Hector & Davis lath Floor, First National Bank Building Bureau of Intergovernmental Miami, Florida 33131 Relations 660 Apalachee Parkway Indian River Junior College Library Tailahassee, Florida 32304 3209 Virginia Avenue Fort Pierce, Florida 33450 Resident Inspector /St. Lucie Administrator fiuclear Power Station
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Department of Environmental Regulation c/o U.S.N.R.C Power Plant Siting section P.O. Box 400 State of florida Jensen Beach, Florida 33457 2500 Blair Stone Road Tallahassee, Florida 32301 Mr. Weldon B. Lewis County Aaministrator St. Lucie County 2300 Virginia Avenue, Room 104 F o r's Pierce, Florida 33450 Director, Technical Assessment Division Office of Radiation Progrart.s (AW 459)
U. S. Environmental Protection Agency Crystal Mall f2 Arlington, Virginia 20450 U.S. Environmental Protection Agency Recion IV Of fice ATTN:
EIS C003.:: N'. TOR 345 Courtland S reet, it.E.
Atlanta, Georcia 30305 Mr. Charles 3. 3rinkma.,
Manager - Washington Nuclear Operations C-E Power Systers
, Combustion Engineering, Inc.
4553 Cordell Avsnue, Suite A-i Bethesda, Maryland 20014
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fNCLOSURE Response to Question 1 a) The question requested that an optimum cooldown rate be established, based on analyses which show upper head voiding would not occur at this optimum cooldown rate. The analyses provided demonstrate your capability to qualitatively predict the voiding process, but do not demonstrate the acceptability of the cooldown rate and method
- identified in your question
,4 response.
Provide this analysis to confirm the acceptability of the specified cooldown rate.
How long is it estimated to take to achieve cold shutdown (shutdown cooling system entry) assuming your proposed cooldown rate and method?
b) Your resronse did not confirm that an adequate condensate grade auxiliary feedwa',, supply was available to support the cooldown rate and method iden6.fied in your response to Question 4.
It is the staff's position that the auxiliary feedwater supply should be sufficient to support a cooldown on natural circulation to shutdown cooling system entry conditions without voiding in the vessel.
Please provide the requested confirmation.
- 25-300 F/hr cooldown rate. Stop and hold at 3509 for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
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