Vice President J W 9

William J. Cahill, J

Vice President

W

9

Consolidated Edison Company of New York, Inc. 4 Irving Place, New York, N Y 10003 Telephone (212) 460-3819

June 30, 1980

Re: Indian Point Unit No. 2 Docket No. 50-247

Director of Nuclear Reactor Regulation

ATTN:

Mr. Steven A. Varga, Chief

Operating Reactors Branch No. 1

Division of Licensing

U. S. Nuclear Regulatory Commission

Washington, D. C. 20555

Dear Mr. Varga:

In accordance with our letter dated April 14, 1980, attached is a Test Report for the endurance testing of the Indian Point Unit No. 2 auxiliary feedwater pumps performed as required by the B&O Task Force Short-Term Recommendation No. 2.

Should you or your staff have any questions, please contact us.

Very truly yours,

attach.

William J. Cahill, Jr. Vice President

I'e

% BOO0oQ090

TEST REPORT

ENDURANCE TESTING OF THE AUXILIARY BOILER FEEDWATER PUMPS

1. INTRODUCTION

By letter dated March 5, 1980 the Nuclear Regulatory Commis sion required Con Edison to perform endurance tests of the Indian Point Unit 2 Auxiliary Boiler Feedwater Pumps (ABFP). The test was to be run in accordance with Short Term Recommendation No.2 which required that each pump be run for a period of 48 hours, followed by a shutdown of at least 8 hours and then restarted and run for 1 more hour.

The endurance testing of the ABFPs was performed during the period of April 18, 1980 through April 28, 1980. This report describes the performance of these tests and presents the results that were obtained.

2. DESCRIPTION 2.1 General

The testing of the pumps was done in accordance with Con Edison's test procedures P-MT-32 Rev.0, "Motor Driven Auxiliary Boiler Feed Pump 48 Hour Endurance Test", dated April 16, 1980 and P-MT-33 Rev. 0, "Steam Driven Auxilary Boiler Feed Pump 48 Hour Endurance Test", dated April 25, 1980.

The two motor driven pumps (Nos. 21 and 23) were run and tested concurrently during the period of April 18 thru 21. The steam driven pump (NO.22) was run and tested by itself during the period of April 26 thru 28. The operation of the two motor driven pumps at the same time and the steam driven pump by itself was selected as being representative of the normal mode of operation of the Auxiliary Feedwater System (AFWS).

The motor and-steam driven pumps were operated with the AFWS in the recirculation mode which draws water from the Conden sate Storage Tank (CST) and then pumps it back to the CST through a 3 inch diameter miniflow line. The system line-up for the two series of tests is shown in Figure Nos. 1 and 2. All of the pumps were operated in accordance with the pump manufacturer's recommendations and limitations for recircu lation flow conditions. All other test conditions were as close to design operating conditions as could be practically achieved without causing pump damage.

Each pump was run continuously for a period of 48 hours, stopped for a period of 8 hours and then restarted and run for 1 more hour. Prior to the restart, the pump bearing temperatures were checked to ensure that they were within 20?F of their values at the start of the test.

-1-

2.2 Test Data & Instrumentation

During the tests the following parameters were measured: 1. Pump discharge and suction pressures

2. Driver bearings vibration

3. Driver bearings temperature

4. Pump bearings vibration

5. Pump bearings temperature

6. Room temperature and humidity

7. Steam Temperature

8. Pump speed The bearing temperatures were measured by holding the probe of a contact pyrometer against the bearing housing at the horizontal mid plane as shown in Figure 3. Bearing vibration was also measured at the same locations using a portable vibrometer.

The room temperature & humidity were measured using a stan dard thermometer and Sling Psychrometer. pump suction and discharge pressures were measured by installing calibrated test gages, at appropriate points, in the AFWS. The speed of the turbine driven pump was measured using a portable strobotac. As defined in the ASME Code Section XI, page 79 paragraph IWP-4400, the motor driven pumps shaft speed need not be measured because these pumps are directly coupled to constant speed motor drivers. 3. TEST RESULTS

The following is a summary of the test results: 1. Pump speed, pump and motor bearing vibration and pump suction and discharge pressures are shown in Table 1. All of these parameters were within the acceptable opera ting range. The vibration of the pump and driver bearings did not exceed allowable limits during any of the test periods.

2. Plots of bearing temperature vs time demonstrating that design limits were not exceeded are shown in Figures 4, 5 and 6. The curves were calculated using a linear regression least squares fit. Pumg No. 22 experienced the highest recorded bearing temperature 142-F. This is within the operating capability of the lubricating oil. The oil, Mobil DTE-797, is a high grade turbine oil with rust inhibiting and oxidation preventative additives. The normal opera tional range of this oil is between 120?F and 155?F with allowable temperatures up to 175 F.

3. All three pumps ran continuously for the 48 hour test period, restarted and ran for 1 more hour after an 8 hour cooldown period. During all of the test runs no operational problems with the pumps were experienced.

4. Plots of pump room ambient temperature and humidity vs. time are shown in Figures 7 and 8. These data show that the environmental qualification limits for safety-related equipment in the room were not exceeded.

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TABLE 1 - TEST DATA

TIME-hours

START I 8

16

24

32

40

48

56

PRESS1

SUCT. PRESS #21-psig

36

DISCH. PRESS. #22-psig i1525

SUCT. PRESS. #22-psig

37

DISCH. PRESS. #23-psig 1570

SUCT. PRESS #23-psg__

36

TURBINE SPEED-rpm BEARING VIBRATION-mils. #21 MOTOR OUTBOARD

3250 1.0

4DISCH.

1540

1530

L3 8 . 1610

39 1630

37 .... 36 . .36.5

37

1600

153._.153O0 .

545

37

25

38

38

42

39

1570

1520

1530 .. 1520 ! 1500 i 1500 -

_

3521

39-9.38

37 . 37 .

3528 1 3517

3512 _

3517

3509

1.0 1 0.8

1.3

1.0

1.5

1.3

J525 . 39

_ . 37

1500

3515

1.2

#21 MOTOR- Inboard

0.5

#21 PUMP- Inboard

-

0.7

#21 PUMP- Outboard

0.4

#22 TURBINE- Outboard

0.8

0.8

0.6

0.6

0.5

0.6

00.3 5

0.2

1.5

0.7

2.5

0.6

0.4

1.3

0.5 _ 0. 3

1.3

0.3 10.3

0.2

2.5 0.7 0.6 .0.3

1.4 0.7

0.5

0.3

:

#22 TURBINE - Inboard _ #22 PUMP -Inboard

0.45 _ _ 0.85 0.35---- 0.4.

#22 PUMP - Outboard #23 MOTOR - Outboard

0.25 1.0

0.25 _ 1.1

#23 MOTOR - Inboard #23 PUMP- Inboard

2.0

1.3

0.5

0.9

0.6

_0.5 .5...............

0.3 .

0.35 .0.35

... 0.3 ........ 0.2

0.3.

0.25 .. 0.25

3

1.4

1.5

0.8

12,.

1i.6..

.

2.0

0.6

0.5 - 0.5 1 1.0

0.6

A _0.

2.1 0.8

#23 PUMP - Outboard __- __________

0.5

0.6

0.5

0.6

0.5

1.3

0.4

0.9

-

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