ML17213B065

Auxiliary Feedwater Sys Pump Endurance Test Rept.

ML17213B065
Person / Time
Site:	Saint Lucie
Issue date:	01/12/1983
From:	FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17213B064	List: ML17213B063 ML17213B065
References
NUDOCS 8302280276
Download: ML17213B065 (24)

Text

AUXILIARY FEEDWATER SYSTEM PUMP ENDURANCE TEST REPORT PREPARED FOR THE UNITED STATES NUCLEAR REGULATORY COMMISSION BY POWER PLANT ENGINEERING JANUARY 12, 1983 8302280276 830225 PDR ADOCK 05000389 A PDR., I

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ABSTRACT .

The purpose of this report is to provide the results of the endurance tests performed on all auxiliary feedwater pumps during the St. Lucie Unit 2 preoperational testing.

Testing was performed in accordance with Preoperational Test Procedure 2-0700095, "Auxiliary Feedwater System Endurance Test". Data of bearing housing and bearing oil temperature vs time and pump room ambient temperature vs time for each auxiliary feedwater pump was recorded and plotted. The pumps performance characteristics were also observed and plotted. The test also examined the pumps to ensure that allowable vibration limits were not exceeded.

The test demonstrated that bearing housing, bearing oil temperature and ambient temperature remained within the design temperature limits. In addition, the test showed that vibration limits were not exceeded and that the pump's performance requirements were maintained.

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INTRODUCTION The Auxiliary Feedwater Pump Endurance Test for the St. Lucie Unit 2 nuclear site was performed between October 8, 1982 and November 7, 1982. This test was performed as a result of a USNRC recommendation. To implement this recommendation, FPL committed to perform this test and provide a copy of the test results.

This report presents the test results in five sections as follows:

(1) Description of the test method (2) Results and conclusions demon-strating that temperature design limits were not exceeded for the pump bearing housing/bearing oil (3) Results and conclusions demonstrating that pump room ambient temperature did not exceed environmental qualification temperature limits for safety-related equipment (4) Confirmation that pump vibration limits were not exceeded and (5) Demonstration that pump performance parameters were maintained. At the end of the report, conclusions are presented.

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(1) Test Procedure The test was performed by pumping water thru each pump by either a recircu-lation loop to the Condensate Storage Tank or by feeding the Steam Generators as required to support Pre-core Hot Functional Testing. The testing lasted a period of at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. Figures 1, 2 and 3 show the flow configurations used for pump 2A, 2B and 2C. Each pump was stopped at the end of the 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> test and allowed to cool down before it was restarted and run for an additional hour. A summary of the relevant test parameters are listed in Table 1.

Table 1 - Test Condition PARAMETER Operating Design Pum Head (ft H20) Test Condition 0 eratin Condition 2A AFW Pump 3058 - 2960 2660 2B AFW Pump 2991 - 2933 2660 2C AFW Pump 3040 2660 PUMP FLOW (GPM) 2A AFW Pump 50 - 170* 300 2B AFW Pump 50 - 170* 300 2C AFW Pump 70** 570

• Includes 50 GPM recirculation flow

• • Includes 70 GPM recirculation flow PUMP SPEED (RPM) 2C AFW Pump 3750 - 3850 3750 RPM Steam Inlet Tem erature ( F) 2C AFW Pump Steam Inlet temperature 518F -532F 512 F 544oF (2) Bearing housing/bearing oil temperatures for the AFW pump driver, inboard and outboard bearings were recorded (Tl - T4 ) as a function of time.

The results are presented in figures 3 thru 6 and they demonstrate that the pump/driver design temperature limits for these bearings were not exceeded during the tests.

(3) Figures 3 thru 6 also contain the pump room ambient temperatures (T5 )

versus time. As can be seen from the recorded results, a steady and acceptable ambient room temperature was maintained throughout the endurance test and environmental qualification temperature limits were not exceeded for safety related equipment.

(4) Pump vibration data was recorded during the endurance tests using a calibrated hand-held vibrometer. The results indicate that AFW pump vibration

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did not exceed allowable limits established by plant procedures.

(5) Auxiliary Feedwater Pump performance characteristics (based on assumed recirculation flow) were recorded during the endurance test. The results are presented in figures 7 through 9 and demonstrate acceptable performance.

CONCLUSIONS This report presents the results of St. Lucie Unit 2 AFl< pump 2A, 2B, and 2C endurance tests performed as a result of a USNRC recommendation.

The results demonstrate that the pumps remain within design limits with respect to bearing housing/bearing oil temperature and vibration, that the pump room ambient temperature did not exceed environmental qualification temperature limits for safety-related equipment in the room and that the pumps'erformance characteristics were acceptable.

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