ML17342A091
| ML17342A091 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 05/02/1980 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| References | |
| NUDOCS 8005130664 | |
| Download: ML17342A091 (13) | |
Text
5>3O i/0I IIsI.I'I'- tiIiIIL MAY 0 2
~98P Docket No. 50-335 Dr. Robert E. Uhrig Vice President Florida Power 8 Light Company Advanced Systems 8 Technology P. 0.
Box 529100 Miami, Florida 33152
Dear Dr. Uhrig:
Distribution:
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- Attorney, OELD OI8,E (3).
ACRS (16)
Gray file PNatthews By letter dated December 21, 1979, you provided information,in response to our letter of October 17, 1979, on the auxiliary feedwater systems at St. Lucie, Unit No. 1.
Enclosure 1 identifies information that we need to complete our review.
Enclosure 2 states our position on endurance tests for auxi'liary feed-water pumps.
Sincet'ely, Original signed b}(
Robert N, Reid M
Enclosures:
1.
Request for Additional, Information 2.
Staffs Position on Endurance Tests for Auxiliary.Feedwater pumps cc w/enclosures:
See next page Robert ti. Reid, Chief Operating Reactors Branch lml4 Division of Licensing 4'
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II UNlTED STATES NVCLEAR REGVLATORYCOMMlSS(ON WASHINGTON, D. C. 20555 May 2, 1980 Docket No. 50-335 Dr. Robert E. Uhrig Vice President Florida Power 5 Light Company Advanced Systems 8 Technology P. 0.
Box 529100 Miami, Florida 33152
Dear Dr. Uhrig:
By letter dated December 21, 1979, to our letter of October 17, 1979, at St. Lucie, Unit No.'.
you provided information in response on the auxiliary feedwater systems Enclosure 1 identifies information that we need to complete our review.
Enclosure 2 states our position on endurance tests for auxiliary feed-water pumps.
Sincerely,
Enclosures:
1.
Request for Additional Information 2.
Staffs Position on Endurance Tests for Auxiliary Feedwater pumps cc w/enclosures:
See next page Robert M. Reid, Chief Operating Reactors Branch 84 Division of Licensing
I Florida Power 5 L ght Company cc w/encl osure{ s):
Robert Lowenstein,=Esquire Lowenstein, Newman, Reis h Axelrad 1025 Connecticut Avenue, N.M.
Mashington, D.C.
20036 Norman A. Coll, Esquire McCarthy, Steel, Hector 5 Davis 14th Floor, First National Bank Building Miami, Florida 33131 Indian River Junior College Library 3209 Virginia Avenue Fort Pierce, Florida 33450 Administrator Department of Environmental Regulation Power Plant 'Siting Section State'of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 Mr. Meldon B. Lewis County Administrator St. Lucie County 2300 Virginia Avenue, Room 104 Fort Pierce, Florida 33450 Director, Technical Assessment Division.
Office of Radiation Programs (At~-459)
U. S.
Environmental Protection Agency Crystal Hall f2 Arlington, Virginia 20460 U.S. Environmental Protection Agency Region IV Office ATTN:
EIS COORDINATOR 345 Courtland Street, N.E.
Atlanta, Georgia 30308 Nr. Jack Shreve Office of the Public Counsel Room 4, Holland Bldg.
Tallahassee, Florida 32304 Bureau of Intergovernmental Relations 660 Apalachee Parkway Tallahassee, Florida 32304
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Enclosure 1
ST. LUCIE, UNIT NO.
1 RE(VEST FOR ADDITIONAL INFORMATION AUXILIARYFEEDWATER SYSTEM DOCKET NO. 50-335 A.
Short Term Recommendations-.
1.
Recommendation GS-4 FPL estimated that it would take up to 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> to initiate the alternate water sources to the condensate storage tank.
There-
- fore, FPL should assure that the AFW emergency procedures include directions for switchover in a time frame that would prevent AFW pump damage.
- Also, FPL should commit to include tha hotwell make up procedures in their emergency operating procedures and should identify the time needed for such a switchover, if hotwell is used.
2.
Recommendation GS-5 FPL should verify that adequate lighting is powered by DC sources and that communications are available at the local station.
B.
Additional Short Term Recommendations 1.
FPL should provide a redundant low-level indication and alarm channel for the condensate storage tank.
The level indications should be redundant from the detectors to the readouts and alarms inside the control room.
Power supplies for the indication and alarm should also be redundant.
Use of non-Class lE circuitry and power supplies is acceptable for the short term provided one power train has a backup battery source.
Since the tank is a
seismic Category I water source, the entire water level indication and alarm systems
- should, by January 1, 1981, be installed to safety grade requirements including the use of Class 1E circuitry and power supplies.
2.
We agree with FPL that the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> test is excessive but disagree that a
12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> test is sufficient.
We have revised our position and reduced requirements for the endurance test from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> (see enclosure 2).
FPL should complete the 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> endurance test and provide the requested test information (enclosure 2).
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C.
Lon Term Recommendations 1.
Recoranendation GL-3 FPL should commit to modifying the AFW system design to meet the requirements of GL-3.
The modifications-should allow automatic AFW initiation in the event of a complete loss of AC power with AFW control inside the control room and with no operator action outside the control room for at least two hours.
2.
Recommendation Plant S ecific Our letter dated October 17, 1979, requires the modifications or procedure changes to be completed by January 1, 1981.
FPL should, therefore, submit the proposed modifications within 120 days of receipt of this letter to allow adequate time for an NRC review.
D.
Hasis for AFW S stem Flow Re uirements FPL should provide a response to the information requested in Enclosure 2 within 120 days of receipt of this letter.
Enclosure 2
Revision to Recommendation No.
2 of "Additional Short Term Recommendations" Regarding Auxiliary Feedwater Pump Endurance Test The licensee should perform an endurance test on all AFM system pumps.
The test should continue for at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after achieving the following test conditions:
- Pump/driver operating at rated speed and
- Pump developing rated discharge pressure and flow or some higher pressure at a reduced flow but not exceeding the pump vendor 's maximum permitted discharge pressure value for a 48-hour test
- For turbine drivers, steam temperature should be as close to normal operating steam temperature as practicable but in no case should the temperature be less than 400'F.
Following the 48-hour pump run, the pumps should be shut down and allowed to cool down until pump temperatures reduce to within 20'F of their values at the start of the 48-hour test and at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. have elapsed.
Following the cool down, the pumps should be restarted and run for one hour.
Test acceptance criteria should include demonstrating that the pumps remain within design limits with respect to bearing/bearing oil tempera-tures and vibration and that ambient pump room conditions (temperature, humidity) do not exceed environmental qualification limits for safety-related equipment in the room.
The licensee should provide a
summary of the conditions and results of the tests.
The summary should include the following:
1)
A brief description of the test method (including flow schematic diagram) and how the test
was instrumented (i.e., where and how bearing temperatures were measured).
2)
A discussion of how the test conditions (pump flow, head, speed and steam temperature) compare to design operating conditions.
- 3) Plots of bearing/bearing oil temperature
'.s. time for each bearing of each AFW pump/driver demonstrating that temperature design limits were not exceeded.
4)
A plot of pump room ambient temperature and humidity vs.
time demonstrating that the pump room ambient conditions do not exceed environmental qualification limits for safety-related equipment in the room.
5)
A,statement confirming that the pump vibration did not exceed allowable limits during tests.