ML20024D137

Forwards Results of 48 H Endurance Runs for Each of Three Emergency Feedwater Pumps During Preoperational Testing to Confirm Pump Operability within Design Limits

ML20024D137
Person / Time
Site:	Waterford
Issue date:	07/12/1983
From:	Drummond F LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
W3I83-0197, W3I83-197, NUDOCS 8308030194
Download: ML20024D137 (20)

Text

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3 0 W E R & L I G H T ! NEW ORLEANS LOUIStANA 7e174-BOOe . (504)368-.345 MIDDLE SOUTH UTIUTIES SYSTEM July 12, 1983 W3I83-0197 Q-3-Nil.F6 Q-N21.P2 3-N33 Mr. John T. Collins, Regional Administrator Region IV q U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 g ak -

g Arlington, Texas 76012 i i- l

, g l SG83 0 i

SUBJECT:

Waterford 3 SES Unit No. 3 Docket No. 50-382 h

Endurance Tests of the Emergency Feedwater Pt J W ~

REFERENCE:

Safety Evaluation Report Section 10.4.9.3

Dear Mr. Collins:

Section 10.4.9.3(2) of the Safety Evaluation Report states that, "In FSAR Table 10.4.9A-2, the applicant committed to perform a 48-hr endurance test on all EFWS pumps during preoperational testing. The applicant also committed to provide a copy of test results including:

(a) A brief description of the test method and instrumentation used, (b) A plot of bearing and bearing oil temperatures vs time to demonstrate that the temperature design limits were not exceeded, (c) A plot of pump room ambient temperature and humidity vs time to demonstrate that the pump room ambient conditions do not exceed environmental qualification limits for safety-related equipment in the room, and (d) A statement confirming that the pump vibration limits were not exceeded."

In accordance with this commitment Louisiana Power & Light Co. conducted endurance runs of 48-hr duration for each of the threb Emergency Feedwater Pumps (2 motor driven and 1 turbine driven) during preoperational testing to confirm that the pumps were capable of operation within design limits.

Test Method The Emergency Feedwater pumps were tested in accordance with preoperational test procedure SP0-73-001, " Emergency Feedwater". The pumps were operated for at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> with minimum flow in the recirculation mode. The pumps were aligned so that suction was taken from the Condensate Storage Pool (CSP) and pump discharge was recirculated back to the CSP. Minimum flow operation was used because it is the most rigorous mode of operation for the pumps.

8308030194 830712 PDR ADUCK 05000382 PDR p b[ \\

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Parameters measured during the tests included: pump discharge pressure, recirculation flow rate, pump, motor, and turbine bearing temperatures, pump room temperature and' humidity, pump vibration limits, motor winding temperature, and motor current. Hourly readings were taken and are tabulated on the attachments along with reference to the. instruments used to obtain the data. Where practicable permanent plant instrumentation was used to monitor pump performance and for collecting data. Permanent plant insrumentation was used to monitor pump discharge pressure,. recirculation flow, bearing temperatures, motor winding temperature, motor running current, and steam pressure of the turbine. It should be.noted that bearing oil temperature is not an instrumented parameter on the Waterford 3 Emergency Feedwater Pumps. Bearing temperatures are monitored by permanently installed thermocouples in direct contact with the bearing metal on each pump / motor inboard and outboard bearings. The actual EFWS pump A recirculation flow was. greater than that indicated on the attachement due to a problem with the orifice flange for DPIS-FW-8320AS. This problem was corrected after completion of the endurance run and had no effect on the results since the objective of the test was to monitor bearing temperatures and pump vibrations.

Conclusion As shown on the attachments the 48-hr endurance runs were completed satisfactorily for all three Emergency Feedwater Pumps and bearing temperatures, pump vibrations, and room temperature / humidity conditions measured during the testing were well within the design limits which are as follows:

Motor / Turbine Bearings - 194*F Motor Stator - 266*F Pump Bearings - 200*F Vibrations - 0.314 in/see Room Temperature - 104*F (motor driven pump rooms) 150*F (turbine driven pump room)

Relative Humidity - 90%

If you require additional information or wish to discuss this matter further, please do not. hesitate to contact me.

Very truly yours, f

'-c> mtal F. J. Drummond Project Support Manager - Nuclear FJD/RWP/WAC/pjl cc: G. W. Knighton (USNRC), E. L. Blake, W. M. Stevenson, J. Wilsin (USNRC)

5 l . t EMERGENCY FEEDWATER PUMP A ENDURANCE RUN DATA AND PLOTS

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EMERGENCY FEEDWATER' PUMP B ENDURANCE RUN BEARING TEMPERATURE VS TIME 200 --

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DATA AND PLOTS

EMERGENCY FEEDWATER PUMP A/B ENDURANCE RUN BEARING TEMPERATURE VS TIME 200 --

BEARING TEMPERATURE LIMIT = 194 F 180 .-

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EMERGENCY FEEDWATER PUMP A/B ENDURANCE RUN TEMPERATURE / HUMIDITY VS TIME TEMPERATURE LIMIT = 150 F 150--

M 100-- --100 HUMIDITY LIMIT = 90 %

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EMERCENCY FEEDWATER PUHP A/8 ENDURANCE RUN DATA Turbine Turbine Turbine High Pump Disch. Recirculation Pump Inboard Pump Outboard Ir. board Outboard Steam Pump Room Pump Room Steam Vibration rime Pressure Flow Bearing Temp Bearing Temp Bearing Temp Bearing Temp Temp Ilumidity 2 Temp 'F Pressure  ?

FI-FW-8322S DPIS- FW-8320 TE-FW-8335 TE-FW-8336 T E-FW-833 7 TE-FW-8338 TE-HS-8345 H&TE PETE FI-HS-A103OI S10300 A10304 A10305 A10306 A10307 A10310 Hi-itT-156.06 M1-IrT-156.06 kfkkhy 3/20/ 13 1400 1359.4 80.9 144.1 153.2 '!!4.5 117.3 542.7 62% 66.0*F 940.8 No 1500 1361.2 81.2 144.3 153.1 114.5 117.2 546.2 70% 65.0*F 964.2 No -

1600 1361.6 80.7 144.9 153.2  !!4.9 117.6 546.8 65% 66.0*F 968.2 No 1700 1364.2 80.7 144.4 153.3 114.9_ 117.8 550.8 63% 63.0'F 999.2 No 1800 1364.2 80.6 144.3 153.4 115.2 118.3 553.7 58% 62.0*F 1020.0 No 1

1900_ 1359.7 81.0 144.3 153.5 115.3 118.4 548.3 54% 62.0'F 980.0 No 2000 1361.2 80.8 144.4 153.6 115.5 113.7 549.0 52% 62.0*F 905.3 No 2l00 1360.9 80.6 144.7 153.9 116.0 119.2 548.5 47% 62.0*F 980.9 No 2200 1361.6 80.8 145.0 154.0 116.1 119.4 548.0 47% 62.0'F 977.6 No 2300 1360.1 80.6 145.2 154.2 116.3 119.3 546.8 75% 64.0*F 968.7 No 3/21/13 0000 1361.6 80.8 145.4 154.6 116.8 130.3 546.6 70% 62.0*F 967.2 No 0100 1362.7 30.8 145.1 154.6 116.4 119.7 547.1 56% 61.0*F 970.6 No 0200 1362.4 80.7 144.8 154.1 115.3 119.0 547.7 55% 60.C'F 975.7 No 03C0 1364.6 81.0 144.5 153.8 115.3 110.4 550.1 56% 61.0*F 993.6 Ilo JLQ}0_ 1362.0 80.5 144.0 153.0 114.9 117.9 546.8 53% 58.0'F 963.3 No 0500 1361.6 80.7 143.9 152.8 114.7 117.7 546.6 46% 58.0'F 966.6 No 0600 1363.5 80.7 143.8 152.6 114.4 117.4 547.2 51% 58.0'F 971.6 No 0700 1360.1 80.3 143.3 152.4  !!4.0 117.1 545.7 52% 59.0*F 959.8 No 08C3 1364.6 80.9 143.4 152.2 113.9 Il6.E 546.9 46% 59.0*F 969.7 No 0900 1362.0 80.5 143.5 152.3 113.9 116.9 545.8 46% 60.0*F 960.7 No

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