Text

Forwards Info Re 48 H Endurance Testing of Auxiliary Feedwater Pump G10W.New Pump Can Run Continuously for 48 H W/O Exceeding Design Limits Re Bearing/Bearing Lube Oil Temps
	ML13322A994
Person / Time
Site:	San Onofre
Issue date:	06/08/1989
From:	Nandy F; SOUTHERN CALIFORNIA EDISON CO.
To:	; NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
	NUDOCS 8906130089
	Download: ML13322A994 (13)
	v • d • e

Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 F. R. NANDY TELEPHONE MANAGER OF NUCLEAR LICENSING (818) 302-1896 June 8, 1989 U. S. Nuclear Regulatory Commission Attention:

Document Control Desk Washington, D.C. 20555 Gentlemen:

Subject:

Docket No. 50-206 Auxiliary Feedwater Pump G10W, 48-Hour Endurance Run San Onofre Nuclear Generating Station Unit 1 By letter dated November 15, 1979, the NRC provided recommendations regarding the Auxiliary Feedwater (AFW) system at San Onofre Unit 1. In response to one of these recommendations, SCE performed endurance testing of the two existing AFW pumps. The test results were provided to the NRC by letter dated February 14, 1980. The purpose of this letter is to provide to you similar information regarding endurance testing of the new AFW pump (G1OW) which has been installed as part of elimination of single failure susceptibilities in the AFW system. Based on this testing, the new AFW pump can run continuously for 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months (minimum) without exceeding design limits with respect to bearing/bearing lube oil tempertures.

If you have any questions regarding the enclosed information or require additional information, please let me know.

Very truly yours, Enclosures cc:

3. B. Martin, Regional Administrator, NRC Region V F. R. Huey, NRC Senior Resident Inspector, San Onofre Units 1, 2 and 3 83906130089 890608 FDR ADOCK 05000206 I

P PDC

0 The following information provides a summary of the conditions and results of the 48-hour endurance test of the third Auxiliary Feedwater pump, GlOW.

1. Provide a brief description of the test method (including flow schematic diagram) and how the test was instrumented (i.e., where and how bearing temperatures were measured).

Response

Section 8.11, "Pump GlOW Forty Eight Hour Endurance Run," of Preoperational Test Procedure SO1-XVI-9.3364.0.1 was developed to establish test methodology and acceptance criteria for bearing and lube oil temperatures and vibration levels. The acceptance criteria were derived from the pump and pump driver manufacturer instruction manuals and pump head curves, or from similar test criteria which have been developed for the In-Service Pump Testing Program performed in compliance with ASME Boiler and Pressure Vessel Code,Section XI requirements.

Pump bearing lube oil temperatures were measured utilizing surface pyrometers which were inserted into thermal wells at the outboard bearing and lube oil cooler inlet and outlet piping. Pump inboard bearing temperatures were obtained using a surface pyrometer on the bearing caps. Motor bearing temperatures were obtained by reading the normally installed temperature elements using fluke multi-meters. Wahl Model 392 MX Platinum Pyrometers were used for the surface pyrometer. Vertical, horizontal and axial (where possible) vibration readings were measured with an IRD Model 308 vibration analyzer at the pump and motor inboard and outboard bearings as shown in Figure 1.

Pump GlOW was operated for at least 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months using the full flow recirculation path from and to the Auxiliary Feedwater Tank as shown on Figure 2. At the conclusion of the 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months endurance run, the pump was stopped and allowed to cool down. Approximately 39 hours4.513889e-4 days 0.0108 hours 6.448413e-5 weeks 1.48395e-5 months later, GlOW was restarted and a one hour operability run was conducted.

2. Provide a discussion of how the test conditions (pump flow, head, speed and steam temperature) compare to design operating conditions.

Response

Pump GlOW was operated at discharge pressure and flow conditions which are representative of design operating conditions. The established flow rate of approximately 390 gpm for this test is at the upper limits of the full flow recirculation line and was determined to be an optimum range of pump and driver operation.

-2

3. Provide plots of bearing/bearing oil temperature versus time for each bearing of the AFW pump/driver demonstrating that temperature design limits were not exceeded.

Response

Pump and driver bearing temperatures were recorded throughout the endurance test. Plots of bearing and bearing lube oil temperatures (pump and driver) versus time for the AFW pump are shown on Figures 3, 4 and

5. A tabulation of these results was extracted from the endurance run test procedure and is provided as Enclosure 2. All bearing and lube oil temperature readings remained within the acceptance criteria during the endurance tests.

The acceptance criteria were as follows:

1. Motor bearing temperture not exceeding 194*F,

2. Pump bearing lube oil temperature not exceeding 155*F, and

3. Lube oil temperature out of the lube oil cooler not exceeding 128 0F.

4. Provide a plot of pump room ambient temperature and humidity versus time demonstrating that the pump room ambient conditions do not exceed environmental qualification limits for safety-related equipment in the room.

Response

AFW pump GlOW is located outside in an open area adjacent to the primary makeup tank and the Dedicated Safe Shutdown diesel generator. Therefore, ambient conditions (temperature, humidity) are not substantially affected by AFW pump operation. Actual temperature and humidity conditions were not measured during the endurance testing.

5. Include a statement confirming that the pump vibration did not exceed allowable limits during tests.

Response

Pump and driver bearing vibration readings were recorded throughout the endurance test and are provided in Enclosure 2. All vibration readings remained within the 1.0 mil amplitude peak-to-peak acceptance criteria.

0793n

Figure 1 Guide to Obtaining GlOW Bearing Vibration Data

1. Motor Outboard

2. Motor Inboard

3. Pump Inboard

4. Pump Outboard

F1 5689 AFW-D-2A AFW-E-947 LUBE OIL COOLER CV AUXILIARY FEEDWATER 110 STORAGE TANK AFW-G-10W AUXILIARY FEEDWATER I

PUMP TO STEAM GENERATOR MSS-E-1A,1B, & 1C Figure 2 AUXILIARY FEEDWATER PUMP G-10W ENDURANCE TEST FLOW PATH

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GlOW Endurance Run Data Record

I.UCLEAR CO.SiHUCI ION PROGRAM MANUAL TEST PROCEDURE SOI-XXVI-9.3364.O VOL.

III TEST PROCEDURES REVISION 0 PAGE 193 OF 205 1 I

~~ATTACHMENT 10.10

(

1\\

IAUXILIARY FEEDWATER PUMP GI0V ENDURANCE RUN DATA RECORD(

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(Hrs)I *Motor Bearing IPump Bearing Lube M&TE TemplSuction jDischargeGIOW FlowlLube Oil LO Cooler I Pump Vibration Motor Vibration I

I I Timel Temp (Ohms/oF)

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(Mils)

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Pumpl(psig)

J(psig)

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1 _____

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Use Attachment 10.10.1 to determine equivalent temperature from measured resistance.

ATTACHMENT 10.10 Page I of 3

NUCLEAR CONSTRUCTION PROGRAM MANUAL TEST PROCEDURE SOI-XXVI-9.3364.U.1 VOL. III TEST PROCEDURES REVISION 0 PAGE 194 OF 205 ATTACHMENT 10.10 AUXILIARY FEEDWATER PUMP GIOW ENDURANCE RUN DATA RECORD I(Hrs)I *Motor Bearing IPump Bearing LubeIM&TE TemplSuction jDischargelGlOW FlowiLube OillLO Cooler I Pump Vibration I Motor Vibration j

I Timel Temp (Ohms/oF)

Oil Temp (OF) IndicatorlPressurelPressure I (GPM) IIniet lWater Inlet I

(Mils)

I (mils)

I PERF./ I I I I I

l(oF) Pumpl(psig)

I(psig)

I FI-5689 lPressurel(psig)

I CIF) I Outboard Ilinboardl Outboard Illnboard DATE I

I ITE-50691 TE-5070I -I5966-I+I-5e61Inboard IPI-5650 I PI-5651 I 1(psig)

IPI-5658IF+-56591 H I V I A 11 H I V I H I V A 11 H I V I T -6 IT\\-506 Bearing I

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Use Attachment 10.10.1 to determine equivalent temperature from measured resistance ATTACHMENT 10.10 Page 2 of 3

NUCLEAR CONSTRUCTION PROGRAM MANUAL TEST PROCEDURE SOl-XXVI-9.3364.O.I VOL. III TEST PROCEDURES REVISION 0 PAGE 195 OF 205 ATTACHMENT 10.10 AUXILIARY FEEDWATER PUMP GIOW ENDURANCE RUN DATA RECORD j(Hrs)l *Motor Bearing IPump Bearing LubeIM&TE TemplSuction 1DischargelGIOW FlowlLube OiILO Cooler I Pump Vibration I Motor Vibration I I Timel Temp (Ohms/OF)

Oil Temp (OF) IlndicatorlPressurelPressure I (GPM) IInIet IWater Inlet I

(Mils) l (mils)

I PERF./

I I. L 1

L I(OF) Pumpl(psig)

I(psig)

I FI-5689 IPressurel(psig) I (OF) I Outboard Illnboardl Outboard Illnboard DATE I I TE-50691 TE-50701++-868 I I-+- 564lInboard IPI-5650 PI-5651 I I(psig)

IPI-56581+-I56591 H I V I A 11 H I V H I V I A 11 H I V w-

-50'-

R

-SOW [Bearing_

IPI-5063 1 I1TR14 1I.JI I

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I Use Attachment 10.10.1 to determine equivalent temperature from measured resistance.

One hour operability run.

Wah] y-91>/

OvJ7/2 97 CnP C)1

-_ATTACHMENT 10.10 Page 3 of 3

ATTACHMENT 10.10.1 NUCLEAR CONSTRUCTION PROQM MANUAL TEST PROCEDURE SO1-XXVI-9.3364.0.1 VO Ll.l TES;T ROCEDUREs GIOW MOTOR BEARING RTD'S REVISION 0 PAGE 196 OF 205 (TE-5069 AND TE-5070)

TEMPERATURE VS RESISTANC GRAPH

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ML13322A994

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