William J. Cahill, J Vice President W

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

9

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,

William J. Cahill, Jr. Vice Presidentattach.

I'e

BOO0oQ090 %

TEST REPORT

ENDURANCE TESTING OF THE AUXILIARY BOILER FEEDWATER PUMPS

1. INTRODUCTION

By letter dated March 5, 1980 the Nuclear Regulatory Commission 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 Condensate 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 recirculation 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 standard 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 operating 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 temperature142-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 operational 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.

-3-

TABLE 1 - TEST DATA

TIME-hours START I 8 16 24 32 40 48 56

4DISCH. PRESS1 1540 .1530 J525

SUCT. PRESS #21-psig 36 L3 8 . 39 37 .... 36 . .36.5 37 39

DISCH. PRESS. #22-psig i1525 1610 1630 1600 153._.153O0 . 545 _ .

SUCT. PRESS. #22-psig 37 37 25 38 38 42 39 37

DISCH. PRESS. #23-psig 1570 1570 1520 1530 .. 1520 ! 1500 i 1500 - 1500

SUCT. PRESS #23-psg__ 36 -938 _ 39. 37 . 37 .

TURBINE SPEED-rpm 3250 3521 3528 1 3517 3512 _ 3517 3509 3515

BEARING VIBRATION-mils.

#21 MOTOR OUTBOARD 1.0 1.0 1 0.8 1.3 1.0 1.5 1.3 1.2

#21 MOTOR- Inboard 0.5 0.8 0.8 1.5 0.7 2.5 2.5 1.4

#21 PUMP- Inboard - 0.7 0.6 0.6 0.6 0.4 1.3 0.7 0.7

#21 PUMP- Outboard 0.4 0.5 0.6 0.5 _ 0. 3 1.3 0.6 0.5

#22 TURBINE- Outboard 003 0.35 0.2 0.3 10.3 0.2 .0.3 0.3 :

#22 TURBINE - Inboard _ 0.45 _ _ 0.85 0.6 _0.5 .5...............

#22 PUMP -Inboard 0.35---- 0.4. 0.3 . 0.35 .0.35 ... 0.3 ........ 0.2 A

#22 PUMP - Outboard 0.25 0.25 0.3. 0.25 .. 0.25 3 _0.

#23 MOTOR - Outboard 1.0 _ 1.1 1.4 1.5 0.8 12,.

#23 MOTOR - Inboard 2.0 1.3 1 i.6.. . 2.0 2.1

#23 PUMP- Inboard 0.5 0.9 0.6 0.5 - 0.5 1 1.0 0.6 0.8

#23 PUMP - Outboard 0.5 0.6 0.5 0.6 0.5 1.3 0.4 0.9

__- __________ -

See Figure 2

(TYP.)

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Storage Tank

Auxiliary Boiler Feed Pumps

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See Figure 2

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Figure No. 1 Auxiliary Boiler Feed Pump Suction Piping

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