Text

Forwards Data & Results of 48-h Standby Auxiliary Feedwater Pumps C & D Endurance Test
	ML17250A298
Person / Time
Site:	Ginna
Issue date:	05/28/1980
From:	White L; ROCHESTER GAS & ELECTRIC CORP.
To:	Crutchfield D; Office of Nuclear Reactor Regulation
References
	TASK-10, TASK-RR NUDOCS 8006030318
	Download: ML17250A298 (70)
	v • d • e

REGULATORY (ORMATION DISTRIBUTION SY 0

(RIDS) tL ACCESSION NBR:8006030318 DOC.DATE; 80/05/28 NOTARIZED:

NO DOCKET FACIL:50 244 Robert Emmet Ginna Nuclear Planti Unit ii Rochester G

05000244 AUTH BYNAME AUTHOR AFFILIATION l'jHITE g L ~ D ~

Rochester Gas 8 Electric Corp.

REC IP, NAME RECIPIENT AFFILIATION CRUTCHF IELDi D ~

Operating Reactors Branch 5

SUBJECT:

Forwards data L results of 48 h Standby Auxiliary Feedwater Pumps C

L D

endura'nce

test, DISTRIBUTION CODE:

A001S COPIES RECEIVED:LTR ENCL Q SIZE::W '7 TITLE: General Distribution for after Issuance of Operating Lic

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g, IlAIC CORPORATION o

89 EAST AVENUE, ROCHESTER, N.Y. 14649 LEON D. WHITE. JR.

VICE PRESIDENT TELEPHONE AREA COOE VIII 546.2700 May 28, 1980 Director of Nuclear Reactor Regulation Attention:

Mr. Dennis M. Crutchfield, Chief Operating Projects Branch 15 U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

NRC requirements for Auziliary Feedwater Systems R.E. Ginna Nuclear Power Plant Docket No. 50-244

Dear Mr. Crutchfield:

This letter is in response to the request that. we perform an endurance test of 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months on our Auxiliary Feedwater Pumps.

Enclosed with this letter is our test data and results of the endurance test performed on our Standby Auziliary Feedwater Pumps "C" and "D".

Sincerely yours, Attachment, L. D. Whi e, Jr.

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NRC UIMRENTS E)R AUKILIABYFEEIMATER SYSTEH GINNA Revision to Recomnendation No.

2 of "Additional Short Term Recomnendations" Regarding Auxiliary Feedwater Pump Endurance Test (NRC letter to L.D. white, dated April 18, 1980)

'Ihe licensee should perform an endurance test on all APd system pumps.

%he test should continue for at least 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months after achieving the following test conditions:

- Pump/driver operating at rated speed Pump developing rated discharge pressure and flow or some higher pressure at a

reduced flow but not exceeding the pump vendor' maxinMm 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 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 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 temperatures and vibration and that ambient pump room conditions (temperature, humidity) do not exceed environmental qualification limits for saf.ty-related equipment in the room.

The licensee should provide a summary of the conditions and results of the tests.

The sugary should include the following: 1) A brief desciption of the test method (including flow schematic diagram) and how the test was instru-

t t

mented (i.e.,

where and how bearing temperatures were measured) 2)

A discussion of how the test conditions (pump flow,

head, speed, and steam tenperature),,

compare to design operating conditions.

3)

Plots of bearing/bearing oil temperature vs.

time for each bearing of each AFW pump/driver demonstrating that temperature design limits were not exceeded.

4)

A plot of pump room anhient 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.

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RG&E RESPONSE R.E ~ GINNA 5/28/80 In the RG&E response on November 28, 1979 to the NRC we coaxnitted to perform the 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months endurance test of the two Standby Auxiliary Feedwater pumps and report the required data.

Lhe time requirement for the test was later changed by the NRC to 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months . h results of the test are presented in this report.

A) Standb Auxili Feedwater P

Data:

Hanufacturer:

Ingersoll-Rand Go.

(Punp Curve-Fig. I)

Design Total Head:

1300 PSIG Desi"n Pump Rating:

200 GPM at 3560 RPH Desi~ Bearing Oil Temperature:

60'F to 165'F Bearing Vibration:

(ANSI Guide Specif ication) 0-1.5 1"QLS Supply Tank Bladder Design:

130'F Liquid Pumped:

32'F to 120'F for condensate or (Lake Ontario Water)

Environmental Condition Desi':

Temperature:

60'F 120'F Humidity:

20/. - 80/

B) Descri tion of Test Method:

The primary water source for the Standby AFW Pumps is Lake

Ontario, which is untreated water.

For testin"

purposes, a 10,000 gallon supply tank of demineralized water is available.

%his supply of treated water

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R.E.GXNNA 5/28/80 would not allow the testing of these pumps at full'low for 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months .

Therefore, each standby pump was operated on recirculation for the required period.

The flow path for the test in the recirculation Bode is shown on the attached diagram.

Pump suction is taken from the condensate supply tank and the discharge is through the recirculation valve through an orifice in the return line to the Condensate Supply Tank.

The condensate supply tank watex temperature was monitored by means of a thexmocouple connected to a Leeds and Northrup roll chart recorder.

'Ihe pump and gator bearing temperatures were monitored by means of thexmocouples inserted into the bearing oil and also connected to the roll chart recorder.

Since the standby system was never designed to operate in the recirculation mode for 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months , a temporary bleed and feed line was added to operate with condensate to maintain the supply tank temperature below the design limits but above the Lake Ontario water temperature.

'Ihe bleed and feed was accomplished by feeding condensate at the top of the tank and bleeding from the bottom.

To further aid in maintaining the tank temperature within design limits and to acconxmdate the tank bleed discharge

hose, the standby APW pump room door was left open to the outside atmosphere.

C) Plots of Bear'Bear Oil T erature vs Time:

Copies of roll char t recorder data for the bearing/bearing oil temperatures for the "C"

and "D" standby AFW pumps are included as Attachments I and II, respectively.

D) Plots of Room Ambient Tem erature and Humidi Temperature and humidity conditions were not continuously recorded during the test but data was taken at various intervals throughout the test period as shown in Table A.1.

'Ihe tempexature and humidity were within

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J R.E.GINNA 5/28/80 the design. criteria limits.

However, it should be noted that this data was obtained with the pump room door open to an outside environment to help maintain the supply tank temperature within limits.

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Pump and rmtor bearing vibration data for the "C'nd "D" standby AFM pumps are shown in Tables A.2 and A.3 respectively.

F) Discussion and

Conclusions:

The 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months endurance test for the Standby Auxiliary Feedwater System pumps was performed under the conditions specified by the NRC in their test requirements in accordance with PT-36.2.1, Standby Auxiliary Feedwater System Recirculation Flow Endurance Test.

The "C"

Standby Auxiliary Feedwater pump test was started March 18, 1980.

The "D" Standby Auxiliary Feedwater pump was tested beginning May 14, 1980.

Both pumps met the conditions specified as described below.

1) "C" Standb Auxiliar Feedwater P

In the recirculation mxle, the pump developed a discharge pressure of 1366.4 psig with a suction pressure of 18.3 psig.

The discharge pressure at this reduced flow condition compared favorably with a discharge pressure of 1253.5 psig obtained in a previous test with normal flow of 200 gpn directly into the Steam Generators.

The two pump bearing oil temperatures increased from 64'F and 66'F to a maximum of 102'F and 111'F from the time of test initiation to approximately five hours later at which time the temperature essentially reached a steady level.

Two hours later the nestor cooler fans were switched with subsequent temperature decreases to 100'F and 102'F respectively.

Temperatures remained at these levels for the duration of the test.

Throughout the test

period, the bearing oil

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R.E.GINNA 5/28/80 temperatures were well within the pump manufacturer' upper design limit of 165'F.

By utilizing a bleed and feed rxde of cooling for the supply tank, tank temperatures remained relatively constant at approximately 80'F throughout the test period.

This temperature was well within the manufacturer's upper design temperature limit of 120'F but above the expected terq~ature of the lake water used during accident conditions.

The temperature and humidity in the standby AFM pump room were monitored periodically throughout the test.

The room temperature during this period ranged between 62'F and 70'F with humidity conditions between 30%

and 37/.

These values may not reflect the conditions which auld exist during energency operation since the room door was kept open to the environment to help maintain the supply tank temperature low and to acconaadate the tank bleed discharge hose.

The pump and mtor bearing vibrations were aonitored by means of an IRD Mechanalysis vibration instrunent at 15 minute intervals for the first three hours and at one hour intervals thereafter, and were well within the allowable limits of 0-1.5 mils during the test period.

The pump and motor bearing vibration readings ranged as follows:

Inboard:

Vertical

.08 to.13 mils Horizontal

.13 to.175 mils Outboard: Vertical

.11 to.22 mils Horizontal

.13 to.18 mils Inboard:

Vertical

.22 to.28 mils Outboard: Vertical

.20 to.40 mils Horizontal

.22 to

.36 mils Horizontal

.23 to.40 mils

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R.E. GlNNA 5/28/So At the completion of the 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months test

interval, the "C"

Standby Auxiliary Feedwater pump was shutdown and allowed to cool-to arrbient temperature for a period of 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Temperature decreased from 102'F and 106'F to 74'F.

The pump was then restarted and successfully operated for one additional hour as per test requirements.

2) "D" Standb Auxili Feedwater Using the recirculation rrode, the pump operated at a discharge pressure of 1353.4 psig and a suction pressure of 15 psig,.

The discharge pressure at this reduced flow condition compared favorably with a

discharge pressure of 1306.8 psig which was obtained in a previous test with normal flow of 200 gpn injected directly into the Steam Generators.

The two pump bearin'il temperatures increased fram 64'F and 66'F to 101'F and 135'F fran the time of test initiation to approximately five hours later.

These bearing oil tanperatures then stabilized at maxin~s of 113'F and 144'F by approximately twenty seven hours into the test.

The temperatures remained at these levels for the duration of the test.

Throughout the test period, the bearing oil temperatures were well within the pump manufacturer's upper desi~ limit of 165'F.

The feed and bleed mode of cooling for the supply tank allowed tank temperatures to be maintained relatively constant at approximately 90'F.

The temperature was well within the manufacturer's upper desi~

limit of 120 F but above the expected temperature of the lake water used during accident conditions.

The temperature and humidity conditions in the Standby AFW pump room were monitored periodically throughout the test.

The. room temperature during this period ranged between 68'F and 82'F with humidity conditions between 28/

and 40/.

These values may not reflect the conditions

>Rich would exist during emergency operation since the

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R.E.GZNNA 5/28/80 outside door was kept open to the environment to help maintain the supply tank temperature low and to accommodate the tank bleed discharge hose.

An IRD Mechanalysis vibration instrunent was used to measure the pump and motor bearing vibrations.

'Ihe vibrations were monitored at 15 minute intervals for the first two hours and then at one hour intervals for the remainder of the test period.

All vibration indications were well within their allowable limits of 0-1.5 mils.

%he pump and notor bearing vibration readings ranged as follows:

Inboard:

Vertical

.08 to.19 mils Horizontal:

.10 to.15 mils Outboard: Vertical

.08 to.13 mils Horizontal:

.11 to.15 mils Inboard:

Vertical

.13 to.22 mils Horizontal:

.18 to..23 mils Outboard: Vertical

.17 to.25 mils Horizontal:

.15 to.24 mils At the completion of the 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months test

interval, the "D"

Standby Auxiliary Feedwater Pump was shutdown and allowed to cool to an ambient temperature for a

period of 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months .

Temperatures decreased from 114'F and 144'F to 81'F.

'Ihe pump was then restarted and successfully operated for one additional hour as per test requirements.

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Contents

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SUBJECT:

Subject:

Dear Mr. Crutchfield:

Conclusions:

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ML17250A298

Text

SUBJECT:

Subject:

Dear Mr. Crutchfield:

Conclusions:

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