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Forwards Addl Info in Response to Auxiliary Feedwater Sys Safety Evaluation Re 48-h Endurance Test of Main Motor Driven Auxiliary Feedwater Pumps a & B
	ML17258A431
Person / Time
Site:	Ginna
Issue date:	01/08/1982
From:	Maier J; ROCHESTER GAS & ELECTRIC CORP.
To:	Crutchfield D; Office of Nuclear Reactor Regulation
References
	RTR-NUREG-0611, RTR-NUREG-611 NUDOCS 8201130453
	Download: ML17258A431 (58)
	v • d • e

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ROCHESTER GAS AND ELECTRIC CORPORATION

~ 89 EAST AVENUE, ROCHESTER, N.Y. 14649 JOHN C. MAIER Vice President Director of Nuclear Reactor Regulation Attention:

Mr. Dennis M. Crutehfield, Chief Operating Reactors Branch No. 5 U.S. Nuclear Regulatory Commission Mashington, D.C.

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Subject:

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

Dear Mr. Crutchfield:

This letter provides additional information M response to the Safety Evaluation Report (SER) for Auxiliary Feedwater System following implementation-of reeomnendation in NUREG-0611.

Specifically, the lette'r addresses the requirement for 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months endurance test of Auxiliary

'eedwater Pumps as stated in the"Additional Short Term Recanmendation number 2 section of the SER sent to RGB by your letter dated January 29, 1981.

Enclosed is a report of the 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months endurance test of the Main Motor Driven Auxiliary Feedwater Pumps A and B. Results of tests of the Turbine Driven Pump and Standby Auxiliary Feedwater Pumps C and D were provided M letters, dated June 8, 1981 and May 28, 1980 respectively.

Very Truly Yours, Attachment John E. Maier IIIOI0/

/r 8201130453 880108'DR ADOCK 05000244 108

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ROCMHKKR GAS AND ELECTRIC CORPORATION Motor Driven Auxiliar Feedwater Pum s A and B 48 Hour Endurance Test The 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months Endurance Test of the "A" and

",B" Motor Driven Auxiliary Feedwater Pump have been completed to meet Che requirements of additional short term recornnendation 2 of NUREG-0611.

The "A" pump test was conducted on October 9, 10, and 11, 1981.

The "B" pump test was conduct;ed on November 6, 7, and 8, 1981.

"A" and "B" Motor Driven Auxiliar Feedwater Pum Data:

Manufacturer:

Design Total Head:

Design Pump Rating:

Design Bearing Oil Temperature:

Bearing Vibration:

(ANSI Guide Specifications)

Worthington (pump curves Fig. 1II2) 1247 psig 6 200 gpm 200 gpm QoF 1@oF 0 1.5 mils Supply Tank Bladder Design:

Liquid Pumped:

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

Environmental Condition Design:

Temperature:

Humidity:

Descri tion of Test Method:

60 F 120 F 20% 80%

The flow path for the test in the recirculation mode is as follows:

(RG3WE Drawing 33013-545)

Pump suction is frcm the Condensate Storage ~ and the discharge is through the recirculation valve back Co the Condensate Storage This flow path was utilized during the entirety of the test.

Following the 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months test run in the recirculation Dade, the pump was shut down and allowed to cool to ambient temperature for an 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period.

Inmediately following the cooldown period, the pump was started again in the recirculation mode ard operated for one hour.

The Condensate Storage Tanks temperature and pump room humidity were read and recorded hourly as was pump suction and discharge pressure.

The pump and Dotor bearings were continuously monitored by thermocouples placed in an existing well of the respective bearing.

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Plots of Beav ar Oil Tem ratures vs. Time:

Thermocouples provided the input to the multi-point Leeds and Northrup roll chart; recorder.

Duving the entire test period, the pump and motor bearing temperatures remained below the manufacturers design Umits.

Copies of roll chart recovder data for the "A" ard "B" Motor Driven Auxiliavy Feedwater Pumps are included as Attachments I and II, respectively.

The points measured for both tests are as listed in Table I.

TABLE I Points Monitoved IIAII Pump IIBII Amb.East Amb. Nest Temp.

Temp.

Amb. East Amb. West Temp.

Temp.

Pump Inbd Pump Outbd Motor Inbd Temp.

Temp.

Pump Inbd Pump Outbd Motor Inbd TBllpe TBIlpo TBllpo Motor Outbd Telllpo Motor Outbd Temp>>

Plots of Condensate Stov e Tanks Tem erature Pum Rocm Hunidit and Pum Suet;ion and Dischar e Pressure:

Hourly readings were recorded throughout the test for relative humidity condensate storage tank temperatuve and pump suction and discharge pressuve as shown on Table II.

The humidity and t;empevatuve were within the environmental design criteria limits.

The pump suction ard discharge pressures weve also within the design limits throughout the entire test.

Pump bearirlg vibration data for the "A" ard "B" Motor Driven Auxiliavy Feedwater Pumps are shown on Table III.

%he pump bearings vibrations were well within allowable limits.

Discussion:

The 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months endurance tests for the "A" ard "B" Motov Driven Auxiliary Feedwater Pumps were performed under the conditions specified by the NRC in their test requirements ard in accovdance with PT-16.4, "Motor Driven Auxiliary Feedwatev Pumps Recivculat;ion Flow Endurance Test."

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Both pumps met the conditions specified as described in the pump specific sections of this report.

At the onset of both pump tests, it was noted on the temperature recorder that the cooling water supply to the pump outboavd bearing was throttled.

The valve was repositioned ard Che beavirjg temperatur'e decreased to a lowev steady state value.

The throttled valve position was measuved following Che completion of each individual test;,

and valve alignment procedures were revised to provide the necessary throttling, to assure that sufficient cooling water is continually available.

An additional cooing water valve ad)ustment was made on the "B" pump outboard beaving at 0130, ll/8/81.

The test technician on duty opened the valve an additional 1/4 Curn Co lower Che bearing temperature to what he considered a <rave acceptable value.

Subsequent discussion with the entire test group following a review of Che temperatuve roll chart, yielded a coneensus opinion that the technician's actions were unneeessavy.

The difference in time required for the bearing temperature to reach a steady state condition warvants some discussion.

The "A" pump vequired approx~tely 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months to stabilize, and Che "B" pump approximately 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

The ma)ority of the difference in the observed times can be attributed to the throttling of cooling water valves already mentioned in this veport.

The "A" pump coolie valves were throttled est and required narc ad)ustment than the "B".

Also, the experience gained in positioning Che "A" pump coolirg valves assisted Che test technicians M stabilizing the 'B" pump rmre vapidly.

In neither case did the bearing temperature exceed the design Hats.

1)

"A" Motor Driven Auxiliar Feedwater Pum In Che recirculation mode, the pump developed a discharge pressuve of 1450.0 psig with a suction pvessuve of 9.0 psig.

The discharge pressure at this reduced flow condition eompaved favorably with the expected pvessure based upon a discharge pressure of 1210.0 psig obtained in a previous test with normal flow of 200 gpm directly into the steam generators.

The two pump'earing oil tempevatuves increased from 63 and 77 F to a maximum of 73 F and 103'F from the time of test initiation until a time approximately 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months latev, at which time Che temperatures reached essentially a steady level.

Temperatures remained at these levels until the conclusion of the 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months run.

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%he two mtor bearing oil temperatures

&creased from 74'F and 76'F to a maximum of 133 F and 120'F fran the time of test initiation until a time approximately 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months later, at which time the temperatures reached essentially a steady level.

Temperatures remained at these levels until the conclusion of the 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months run.

All pump and motor bearing temperatures were well within the pump manufacturers upper design limit of 165'F.

All throughout the

test, temperature and humidity conditions were well within the environmental design conditions.

The pump bearirg vibrations were monitored by means of an IRD Mechanalysis vibration instrument at 15 minute intervals for the first hour and at 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months intervals thereafter.

Throughout the test period vibrations were well within the allowable limits of 0-1.5 mils.

The pump bearirg vibration readings ranged as follows:

TABLE III Vibrations:

Inboard Vertical:

.07 to.09 mils Inboard Horizontal:

.07 to.12 mils Outboard Vertical:.09 to.155 mils Outboard Horizontal:.07 to.12 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 "A" Motor Driven Auxiliary Feedwater Pump was shutdown and allowed to cool to ambient temperature for a period of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

Temperature decreased from 97'F and 72'F to 80'F and 53'F respectively, on the pump inboard and outboard bearings.

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

2)

"B" Motor Driven Auxiliar Feedwater Pum In the recirculation mode, the pump developed a discharge pressure of 1435.0 psig with a suction pressure of 10.8 psig.

%he discharge pressure at this reduced flow condition compared favorably with the expected pressure based upon a discharge pressure of 1180.0 psig obtained in a previous test with normal flow of 200 gpm directly into the steam generators.

The two pump bearing oil temperatures increased from 77'F and 76'F to a mxirnum of 102'F and 115'F from the time of test initiation until a time approximately 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months later, at which time the temperatures reached essentially a steady state level.

Temperatures remained at these levels until the conclusion of the 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months run.

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%he two rrotor bearing oil temperatures increased from 78 F and 78'F Co a maximum of 115'F and 122'F fran the t~ of test initiation to approximately 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Eater, at which time the Cempevatures essentially reached a steady level.

Temperatures remained at these levels until the cooling water valve was readjusted by the technician at 13 1/2 hours into the test.

A11 pump and motor bearirg temperatures were well within Che pump manufacturers uppev design 1Lmit of 165'F.

All throughout the

test, temperature and humidity conditions were well within the Environmental Conditions Design.

The pump bearirg vibrations were monitored by means of an IRD Mechanalysis vibration instrument at 15 minute intervals for the fivst hour and at 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months intervals thereafter.

Throughout the test period, vibrations were well within the allowable limits of 0-1.5 mils.

'Ihe pump bearirg vibration readings ranged as follows:

Vibrations Inboard Vertical:.07 Co.105 mils Inboard Horizontal:

.06 to.10 mils Outboard Vertical:.13 to.23 mils Outboard Hovizontal:.075 Co.12 mils At the completion of the 48 houv test interval, Che "B" Motor Driven Auxiliavy Feedwatev Pump was shutdown and allowed to cool to ambient; tempevature for a period of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

Temperature decveased from 97'F and 78'F to 77'F and 46'F respectively, on the pump inboavd and outboard bearings.

The pump was Chen restarted'nd successfully operated for one additional hour as pev test requirements.

==

Conclusion:==

Both motor dviven Auxiliary Feedwater Pumps A and B can be operated within their design, conditions for periods of at least 48 houvs and will perform their intended functions during extended operating periods.

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ATTACHMENT "A" MOAFMP page 1 of 9 I
C TYPE T"68 C
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page 5 of 9
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page 6 of 9, "A" Pump 05 Qm Q~
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( Q jQ/y VC'll<C4l PEP B~~G VTBRATZON DATA S~T Ve~rical HWLZdh+dI OUT30ARD OGTHOARD 2k' 0
3
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"A" NDAFWP Table IIX PT-16.4 PUHP EMLQfG VIBRATZOH DATA S3EET Ve~e col Ve~vic~(
Ho+i%,can't41 Aovi2n74l OQTHOARD IHBOARD OUTBOARD
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Attachment II "B",MDAFWP Page 1 of 9 50 150 200 TYPE T-68 IJ 300 C
C 50 150 20 0 TYPE T-88 IJ 300
~ et
~ 4 TYPE T-68 50 0
150 200 Points Monitored 11' 1
Pump Amb.
Esse Amb. West Pump Inbd Pump Outbd Mococ Inbd Temp.
Temp.
Temp.
Temp.
Temp.
Motor Outbd
Temp,
0 I
4
\\
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page 2 of 9 "B" pump CO LLC CD 0
50 150 200 TYPE T-68 lj 300 I
CC CD 0
oF 50 0'50 200 TYPE T-68 300
0
Page 3 of 9 "8" Pump i!
Il I
oF 50 00 150 200 TYPE I
25 "68 300 50 150 200 TYPE "68 300 C
'F 3
V, 9 0 150 zao TYPE 300
I F
Page 4 of 9 "B" Pump CLJ CD 0
'F 50 180 150 200 TYPE T-68 300 I-CD fcL I
0 oF 50 1
0 150 200 TYPE I
25
-68 300
'O C~
4 z
0 50 0
150 20 0 TYPE T-68 300
Page 5 of 9 llBlt pUgp C
CO LLIa C z oF 50 0
150 200 TYPE T-88 lj 300
< m
(" x C m CO C3 0
50 150 200 TYPElj T-6 300
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page 6 of 9 "B" Pump i~
I CL ID
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page 7 of 9 "8" Pump CCJ 0
50 100 150 200 TYPE T-68 I
250 300
(
CO I-CD CD CJ
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0 150 200 TYPE T-68 25 300
(% CO C(J 0
OF 50 i 00 150 200 TYP T-6 300
Page 8 of 9 "B" Pump
~
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I cn p, H LeJ 0
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I 25
-68 300 col
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10 0 150 200 TYPE T-68 300 r
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Page 9 of 9 "8" Pump 100 150 200 TYPE I
25
-"68
'00 150 200 TYPE IJ
-68 00 150 200 TYPE I
25 T-68
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MDAFWP PT-.16.4 Table II
'T-16.4:8 1/6/81 Fri'day 0
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Pj-16.4 PT-16.4:7 it PUK? BEARER VIBRATION DATA SKEET vest<<col Hovi2ogta)
He vi~~la tart 11/6/81 Friday I >00
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0 ioEd Ply BEAEL~iG VIBRATZON DAL4 S~T Ve ~"'I Havi2..~at PT-16,4:7"A" (con't)
Ho ~<~~ra ODT30ARD 0
6 iOW o /4-oO lO
~ /W Stop 11/8/81 Start 11/8/81 1 >
ol nday Stop 11/8/81 SU

ML17258A431

Text

Subject:

Dear Mr. Crutchfield:

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