a

E Idaho. Incp 1

F OftM E gag 398

(He< 12-?8?INTERIM REPORT

Accession No. NN28N3LTR LO-00-79-110Report No.

Contract Program or Project Title:

Subject of this Document: " Fast Loop Facility Nitrogen Injection Operation Test"

Type of Document: LTR

T. H. ChenAuthort.3:

Date of Document: January 1980

Responsible NRC Individual and NRC Office or Di- <= ion: G. D. McPherson, RSR

This document was prepared primarily for preliminary orinternal use. it has not receivedfull review and approval. Since there may be substantive changes, this document shouldnot be considered final.

EG&G Idaho, Inc. jidaho Falls, Idaho 83401

g jH. P. Pearson, SupervisorInformation Processing

Prepared for theU.S. Nuclear Regulatory Commissionand the U.S. Department of Energy

Idaho Operations OfficeUnder contract No. EY-76-C-07-1570

NRC FIN No.

inven7,"n*ePon1 BC lesearc1 and Technica!Assistance Rerrt

sooesso 2GJ

> ...

j ''l

E G a 5 \eanoy. .> .

INTEROFFICE CORRESPONDENCE R-5281

mi 4 i. . , .

DISTRIBUTIONio

LOFT CDCS, TAN 602, Ext. 6177' rom,

$** DOCUf1ENT TRANSMITTAL

The following documents released by LOFT CDCS, are hereby transmittedfor your use and information:

DOCUMENT NO. REV CHG DATE

LTR LO-00-79-110 0 1-3-80

" FAST Loop Facility Nitroger. Injection System Operation Test"

T. H. Chen

REMARKS: No disposition required.

DISTRIBUTIONM. Akimoto - 2 G. D. McPherson J. R. WhiteW. Amidei w/o Att. J. C. Morrow D. WuB. O. Anderson S. A. Naff G. B. ShullE. C. Anderson w/o Att. N. E. Pace w/o Att. ' *

J. G. Arendts T. F. PointerB. L. Chamberlain w/o Att. G. RiegerG. A. Dinneen P. SchallyD. B. Engelman D. G. Satterwhite ,/o Att.B. L. Freed-Orig.+7 W. A. SpencerR. T. French J. C. Stachew w/o 4tt.R. C. Go ttula K. C. SumpterR. C. Guenzler R. E. TillerJ. C. Hai re S. R. Wagoner w/o Att.G. L. Hunt w/o Att. G. WeimannF. K. Hyer w/o Att. L. WintersN. C. Kaufman w/o Att. B. J. Yohn

} { }gggg|'Ci 300 :0CIlilICSs

-

S. T. Kelppe T. H. ChenJ. L. Liebenthal P. A. Harris

kggjg{gt]P.P,$0[OJ[A. S. Lockhart L. P. LeachD.11. Marshall J. S. Martinell '

S. Matovich W. J. Quapp

[a,"."di,""*

'

, .r . m. .< -

- m. .

E Idaho, Inc. (LTR) Report No. I0-D0-29-120

Date: January 3, 1980 /1

RELEASED BY LOFT CDCS

USNRC-P-394

INTERNAL TECHNICAL REPORT

Title: FAST LOOP FACILITY NITROGEN INJECTIONSYSTEi1 OPERATION TEST

organization:LOFT TEST SUPPORT BRANCH

Author: T, yhe;;

Checked By: G. R_ Shg11 Approved By: W. J. Quapu

A'!nC'ltGS0?JCh and jeC|1n| Calo 3

Assistance Renart*

THIS DOCUMENT HAS NOT RECEIVED PATENT

CLEARANCE AND IS NOT TO BE TRANSMITTED

TO THE PUEllC DOMAIN

,,-

. .

OYD bbE6 Idaho, Inc'

LOFT TECHNICAL REPORT

LOFT PROGRAMF GAV f G 4 3 219w.. n- rs,

"'' FAST Loop Facility Nitrogen Injection System Operation Tes[ "'"' "LTR-LO-00-79-llo

i

- |sura:= --

;,, ,,.

T. H. Chenat r uoas e.:. u n en 53CBE0lGN

LOFT Test Support Branch'" RELEASED BY LOFT CDCSu,1 a,,,,,,,

Ilb .-c-(t 44 /]r/ % r January 3, 1980 j-- --

LEPD Mgr.

DISPOSITION OF RECOMMENDATIONS

No disposition required.

,f !( L i W S C 8 i til i . -r w m^'. ,.

"u

[FSiS1;jili,08{''''

i *a

LTR-LO-00-79-110

LOFT TEST SUPPORT BRANCH

DATA ANALYSIS REPORT

FAST LOOP FACILITY

HITROGEN INJECTION SYSTEM OPERATION TEST

BY

T. H. Chen

Sash Yh~

APPROVED BY: 4/G. B. Shull

bL 'Lv4)W./J.'' Quapf f

N1C Rereme"""> TicfiiiiTAssistan c hacr':

. .

LTR-LO-00-79-110

ACKNOWLEDGEMENTS

The author would like to thank Messrs. J. Hauth, B. L. Barnes,R. L. Crumley, and R. W. Stanavige for their assistance in planningand carrying out the test. Acknowledgements are also due toDr. C. W. Solbrig and Mr. W. J. Quapp for their comments and technicalguidance.

i

. .

LTR-LO-00-79-110

ABSTRACT

This report presents the results of the Nitrogen Injection SystemOperation test, which was run in the FAST Loop at LOFT Test SupportFacility (LTSF) in the Idaho National Engineering Laboratory. The

primary purpose of this test is to evaluate the feasibility ofinject ing the nitrogen gas into the FAST Loop Facility to simulatetwo-phase flow conditions for a later scheduled Pulse NeutronActivation (PNA) test, and determine the maximum attainable void

fraction without causing severe damage to the main coolant pump. The

test results indicate that the two-phase operation of FAST Loop ispossible with injecting nitrogen but that the maximum void fractionshould not exceed 35% for this type operation.

The measured two-phase characteristics of the main coolant pumpwere compared with those calculated by the RELAP4 pump model used forLOFT L2-2 test prediction. The test data indicate that the loss ofpump head, pressure differential and hydraulic torque at theintermediate void fraction is much less than that obtained by theRELAP4 pump model. It is concluded that the RELAP4 pump model which

is based on the results obtained from testing the Semiscale pump isnot generally applicable to predict the characteristics of the LTSFFAST Loop main coolant pump under steady-state two-phase flowconditions,

ii

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LTR-LO-00-79-110

TABLE OF CONTENTS

Page

A 8 5 TR A C T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii

I. INTRODUCTION............................................... 1

II. TEST CONFIGURATION......................................... 2

I I I . A N AL Y T I C M0D EL S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

IV. TEST RESULTS............................................... 7

V. DATA COMPARIS0NS........................................... 9

VI. CONCLUSIONS................................................ 11

VII. REFERENCES................................................. 12

* 4

LTR-LO-00-79-110

FIGURES

1. FA ST L oop f ac i l i ty s chema t i c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2. Pump head comparison....................................... 20

3. Pump p re ssu re-d i f f erent ia l comp ar i son. . . . . . . . . . . . . . . . . . . . . . 21

4. Pump hydrau li c torque comparison. . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5. Pump he ad deg rada t i on comp ar i son. . . . . . . . . . . . . . . . . . . . . . . . . . . 23

TABLES

I. System Operation Test Cor,ditions............................ 13

II. Measured Loop Properties and the Calculated Void Fraction... 14

III. Measured Main Coolant Pump Properties and the Evaluated

Head........................................................ 15

IV. RELAP4 Predicted Pump Characteristics Compared with Test

Data........................................................ 16

V. Comparison of the Various Pumps Rated Operating

C h a r a c te r i s t i c s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

. .

LTR-LO-00-79-110

1. INTRODUCTION

A test to be conducted in the LTSF single-phase FAST Loop usingPulse Neutron Activation (PNA) requires the facility operation undertwo-phase flow conditions. Nitrogen injection was proposed tosimulate the steam phase. This type operation has never beenperformed in the FAST Loop facility. A preliminary investigationElldetermined that it was possible to simulate two-phase flow conditionsby injecting nitrogen gas into FAST Loop with certain mechanical andoperational modifications.

The Nitrogen Injection System Operation Test was performed inFAST Loop to :

(1) Evaluate the feasibility of injecting nitrogen gas into FASTLoop to simulate two-phase flow conditions.

(2) Determine +.he maximum void fraction of the nitrogen gasattainable for FAST Loop cold temperature ( < 95 C) at high0

speed (3600 rpm).

(3 ) Determine the FAST Loop main coolant pump characteristicsunder steady-state two-phase flow conditions.

This test was done to evaluate the loop and pump performanceunder two-phase conditions for the preparation of PNA test. The PNAmass flow measurement technique is considered to be the most suitable

means of in-situ two-phase mass flow measurement available today.This technique shows a potential as a standard method for two-phasemass flow calibration measurement. Any inf ormation or knowledgegair.ed from the present test and the later scheduled PNA test are

valuable in future mass flow calibration tests for the LOFTinstrumentation.

1

., .

LTR-LO-00-79-110

II. TEST CONFIGURATION

The Full Area Steady-state (FAST) Loop is shown schematically in

Figure 1. The test section (14" GL-4) consists of a 14 in., Schedule160 pipe (0.284 m ID) which is about 2.5 m log. The loop is normally

operated in steady state single phase conditions with two fluidvelocities available:

Hump high speed - 303 1/s nominal flow rate - single phasevelocity 4.78 m/s in the test sectionReynolds Number in the test section between 1and 10 x 106 (according to loop temperature

to 230 C).6pump low speed - 151 1/s - 2.39 m/s - 0.5 to 5 x 10 ,

The reference flow measurement instrument is a full flow turbine(FE 1) located in tne 0.152 m pipe section downstream of the tests ec t i on. The main coolant pump is a Westinghouse Model E/N 3000-El

canned rotor pump.

Before the loop modifications made for this test, the system waslimited to single-phase, steady-state conditions. The modificationswhich have been made to provide the capability of generating the twophase flow include:

(1) Installation of a Nitrogen Injection System to inject the

nitrogen gas into FAST Loop at the test section to createthe nitrogen-water two-phase conditions.

(2) Installation of a main coolant drain and measurement system

to measure the mass of water displaced by the nitrogen gasto determine the system overall void fraction.

(3) Installation of a purge pump to circulate the cooling waterthrough main coolant pump (MCP) top vent to provide MCP

bearing cooling. A flow turbine (FE-3) has been alsoinstalled to monitor this flow.

2

. .

LTR-LO-00-79-110

(4) Several accelerometers (AE), and a sound speaker have been

also installed to monitor the MCP vibrations and noiselevels.

3

, .

LTR-LO-00-79-110

III. ANALYTICAL MODELS

The overall void fraction for this test is defined as thefract ;f total loop volume occupied by the nitrogen gas, namely;

VN

2a=y (1)0

3where V is the system volume which has been measured as 1.68 mO

(excluding the volume of the pressurizer). The volume occupied by the

nitrogen gas (VN ) is measured indirectly by measuring the mass of2

water expelled by the injecting nitrogen gas.

The effect of the dissolved nitrogen has been determined to beE23small The maximum error is what less than one-tenth of a

percent, with dissolved nitrogen neglected. Therefore, the amount of

nitrogen dissolved in the drained water is ignored in calculating thevoid f raction.

The main coolant pump head is determined from the its measured

pressure-differential (PDE-2). The pump pressure-differential dividedby the two-phase flow density yields the pump head, namely,

H = ap/o (2)

where the two-phase density is assumed to be

[= CNg + (1-a) CH O and is given when the void fraction has2

been determined.

The single-phase dimensionless pump head and hydraulic torque

characteristics are usually represented by the following equations:

h=f(q/w) (3)W

4

. .

LTR-LO-00-79-110

for 0 slhl5 1

= g (q/u) (4)

or

= f (w/q) (5)q

for 0 s[ |s 1

t y = g (w/q) (6)q

where

h = H/Hr

t = T/Tr

q = Q/Qr

w = G/D 7

and

H = H (Q,R) = pump head (m)

T = T (Q,0 ) = pump hydraulic torque (N-m)

Q = volume flow rate (1/s)

U = pump angular speed (rpm)

The subscript r denotes the pump rated operating value.

5

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LTR-LO-00-79-110

The pump model employed in RELAP4 calculated the pressure

differential across the pump as a function of fluid volume rate, pump

angular speed and the fluid properties. The model is designed totreat any centrifugal pump and allows for inclusion of two-phaseef f ec ts. The two-phase pump head and hydraulic torque are calculatedas:

y y4 (q, u) - h24 (q,u) x HrH (q, o , a ) = H ) (q,u ) - M (a) h

y4 (q,o ) - t2& (q,u ) x TrT (q, w , a ) = Ty4 (q,w) - M (a) t

where the hydraulic torque is calculated by

-3T= Q XaP x 10 /n (7)

and

14 = single-phase value

2$ = fully degraded two-phase value (0.2s a s 0.9)

h (c) = two-phase head multiplierM

M (a) = two-phase torque multiplier

Ap = pressure differential across the MCP (KPa)

The two-phase head and torque multipliers plus their differencecurves were based on the data obtained from two-phase tests on the

Semiscale pump. The relationship of the two-phase to single-phasebehavior of the Semiscale pump in RELAP is assumed to be applicable tolarger reac tor pumps.

6

% 4

LTR-LO-00-79-110

IV. TEST RESULTS

Data that were recorded for each void fraction increment at all ofthe instrument locations are shown in Figure 1. The data reported inthis report include only those essential to evaluate the test results.In addition, the mass of the drained water was measured and recorded bythe loop operators.

The actual test conditions are listed in Table I. For the first

test, the noise monitoring equipment indicated the abnormal pumpoperation when void fraction reached approximately 40 percent. The pump

was shut off and the test was terminated immediately. The second testwas terminated at a void fraction of 20 percent due to the cccurrence ofthe abnormal noise from the pump. For the first test, the pump vibration

levels recorded by the accelerometers indicated pump oscillations withinthe range of 30 to 40 g at void fractions of 0 to 35 percent. However,

for the second test, the pump vibration levels were twice as high (60 to80 g) as that of the first test. It indicated that the pump may haveexperienced some minor damage during the first test when a void fractionreached 40 percent. The second test was terminated at a void fraction of

20 percent in order to avoid further damage and to save the pump for thePNA test.

A water sample taken from the loop following the system operation

tests contained black particles, probably from the graphitor pumpbearings. A post mortem inspection of the pump after the PNA testindicated extensive pump damage.

The measured values of system pressure (PE-2), system thetemperature (TE-7), and the total mass of drained water, plus the actualcalculated void fraction are presented in Table II. It can be seen thatsystem pressure is fairly constant for all void fraction. H owever ,system temperature rises slowly and later reaches a constant value. Thisinitial increase in coolant temperature is due to heat dissipation by themain coolant pump. The actual void fractions calculated using Equation 1closely matches the original desired values.

7

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LTR-LO-00-79-110

The measured main coolant pump properties which include the systemvolume flow rate (FE-1), MCP pressure-differential (PDE-2), and MCPcurrent (PC), plus the calculated head are listed in Table Ill.

It can be seen that both the pump pressure-differential and currentdecrease nonotonically as void fraction builds up within the loop. The

pump pressure-differential at 15 ~35 percent void decreases more rapidlythan that at 0-15 percent void. The pump current shows similar

characteristics. However, the pump head behaves di f ferently. The pump

head increases gradually at the beginning and then reduces monotonicallyas void fraction increases. This initial increase in pump head is due to:

(1) the increase in void fraction which results in smallertwo-phase density,

(2) the measured single-phase pump pressure differential of 681 KPawhich is slightly: lower than the value of 710 KPa obtained from

the pump characteristics curve, because the pressure

differential transducer is limited to the maximum value of689.5 KPa.

8

. .

LTR-LO-00-79-110

V. DATA COMPARISONS

In this section, the measured two-phase characteristics of the FASTLoop MCP are compared with those calculated by the RELAP4 pump model .

The purpose of performin, these data comparisons is trying to determinewhether test results of the FAST Loop MCP can be reproduced withacceptable accuracy by the RELAP4 pump model. The RELAP4 pump model is

based on the results of testing the Semiscale pump.

The rated operating characteristics of the LTSF FAST Loop MCb

together with those of Semiscale, LOFT, and CE/EPRI pumps are presentedin Table V. It can be seen that the FAST Loop MCP is very similar to theLOFT L2-2 prediction was employed to predict the performance of the FASTLoop MCP.

Based on the measured volume flow rate obtained from the first test,the MCP two-phase hea. . pressure-differential and hydraulic torquecalculated by RELAP4 pump model used for LOFT L2-2 prediction togetherwith their corresponding measured values are presented in Table IV. The

two-phase head and torque multipliers plus the values of their respectivedifference curves are taken directly from input data used for the RELAP4pump model used for LOFT L2-2 test prediction [53 The head and torque

multipliers have been modified to better represent the larger pumps usedin the LOFT experiments.

Figure 2 presents the measured and calculated MCP head degradationas function of the void fraction. Figures 3 and 4 present thecorresponding pressure differential and hydraulic comparisons.

The data clearly indicate that the loss of two-phase pump head,pressure differential, and hydraulic torque at the intermediate voidfractions (i.e., 0.2 to ~0.35) is much less than that calculated by theRELAP4 pump model used for LOFT L2-2 prediction. Figure 5 also presentsthe head degradation as function of the void fraction for the FAST LoopMCP and CE/EPRI pump ](both have approximately the same specific speed,C6

9

. .

LTR-LO-00-79-110

but their geometries are not similar) compared with that used for LOFTL2-2 prediction. It is apparent that the loss of two-phase pump head for

any centrifugal pump is dependent upon the pump specific speed arid theparticular pump design characteristics.

The RELAP4 pump model used for LOFT L2-2 prediction is primarily

based on the data obtained from testing the Semiscale pump understeam-water conditions. Assuming that nitrogen-water testing isrepresentative of steam-water testing the discrepancies between themeasured and calculated two-phase pump characteristics is attributed tothe different pump specific speed and design characteristics.

10

. .

LTR-LO-00-79-110

VI. CONCLUSIONS

The test results indicate that at a void fraction of 35 percent, themain coolant pump pressure differential is reduced by 38 percent, the

pump current is reduced by 27 percent, the pump head is reduced by7 percent and the hydraulic torque is reduced 47 percent compared totheir respective single-phase operational values. During two-phase

operation abnormal noise was detected by the noise monitoring equipmentand following the system operation test black particles were found in thesample water. This indicated that the graphitar pump bearings hadexperienced some minor damage. A post mortem inspection of the pumpaf ter the long duration PNA test, indicated extensive pump damage. It

appears that the two-phase operation of the FAST Loop by injectingnitrogen at lower void fraction (5,35 percent) for a shorter period willnot cause immediate severe pump damage. However, repetition of this typeof operation for a longer duration may eventually cause extensive pumpdamage. It is concluded that simulation of two-phase flow using nitrogenin the FAST Loop Facility is possible for the PNA test provided that themaximum void fraction does not exceed 35 percent and long duration testperiods can be avoided.

In order to obtain a more realistic (best estimate) prediction ofpump performance under two-phase flow conditions, pump degradation data(as applied in models such as the RELAP4 computer code) should be based

on data from pumps having similar specific speeds and designcharacteristics as the one to be analyzed.

11

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LTR-LO-00-79-110

VII. REFERENCES

1. J. C. Hauth, " Air-Water Operation of FAST Facility Main CoolantPump," letter to C. W. Solbr ig, JCH-10-78.

2. T. H. Chen, "The Effect of Dissolved Gases on the Accuracy of VoidFraction Calculations in the FAST Loop Nitrogen Injection SystemOperation Test," letter to C. W. Solbrig, THC-4-78.

3. Westinghouse Electric Corp., " Technical Manual," 5710-26A.

4. Aerojet Nuclear Co., "RELAP4/M005: Computer Program for TransientThermal-Hydraulic Analysis of Nuclear Reactors and Related Systems,User's Manual," ANCR-NUREG-1335, Vol.1, Septemoer 1976.

5. EG G Idaho, Inc., "Best Estimate Experiment Predictions for LOFT

Nuclear Experiments L2-2, L2-3, and L2-4," LOFT-TR-101,November 1978.

6. J. A. Hunter and P. A. Harris, " Performance of Small Nuclear ReactorPrimary Coolant Pumps Under Bloddown Conditions," ASME Winter AnnualMeeting, San Francisco, California, December 1978.

12

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LTR-LO-00-79-110

TABLE I

SYSTEM OPERATION TEST CONDITIONS

Te st System Temperature System Pressure Void FractionNumber (oC) (MPa) (%)

I 57 s 75 5.5 0 s 40

II 63 s 82 3.67 ~ 4.1 0 s 20

13

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LTR-LO-00-79-110

TABLE 11

MEASURED LOOP PROPERTIES AND THE CALCULATED VOID FRACTION

Data Point Pressure-PE2 Tempera ture-TE7 Desired Void Total Coolant Actual Void(MPa) (O ) Fraction (%) Orained (Kg) Fraction (%)C

1.0 5.56 57 0 0 0

1.1 5.90 62 5 82.03 4.97

1.2 5.77 67 10 162.60 9.95

1.3 5.6 74 15 246.94 15.03

1.4 5.64 75 20 328.83 20.09

1.5 5.62 76 25 411.54 25.14

1.6 5.53 75 30 493.57 30.14

1.7 5.55 75 35 575.82 35.16

1.8 75 40 652.53 40.02

2.0 3.67 63 0 0 0

2.1 4.13 65 5 82.66 5.01

2.2 4.25 74 10 164.64 10.01

2.3 4.14 76 15 246.85 15.02

2.4 4.11 82 20 329.56 20.07

14

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LTR-LO-00-79-110

TABLE III

MEASURED MAIN COOLANT PUMP PROPERTIES AND THE EVALUATED HEAD

Flow Rate-FE-1 MPC-oP Pump Current MCP HeadData Point (1/s) P'52 (KPa) PC (amps) (m)

1.0 261 681 424 70.52

1.1 260 664 421 72.33

1.2 257 634 409 72.84

1.3 254 600 390 73.13

1.4 250 564 374 72.78

1.5 244 525 357 72.01

1.6 236 479 335 69.95

1.7 223 419 308 65.52

1.8_

2.0 260 650 460 67.51

2.1 255 628 445 68.60

2.2 253 605 430 69.96

2.3 250 573 414 70.06

2.4 244 540 392 70.26

15

iABLE IV.

RELAP4 PREDICTED PUMP CHARACTERISTICS COMPARED WITH TEST DATA

Void Predicted Measured Preditted MeasuredH H (a) H(a) P PFrac tion

(%) Mh (a ) (h : - h .) (m)g (m) (m) (KPa) (KPa)l 2

0 0.00 0.95 73.56 73.56 70.52 710 681

5 0.04 0.95 73.92 71.31 72.33 655 664

10 0.10 0.95 74.66 68.14 72.84 593 634

15 0.28 0.94 75.41 57.35 73.13 470 600

$20 0.46 0.95 76.43 46.45 72.78 360 564

25 0.83 0.95 75.42 21.33 72.01 155 525

30 0.96 0.96 77.32 14.10 69.95 97 479

35 0.97 0.98 80.09 14.88 65.52 95 419 G?GSL'?

O

.

9

.

.

TAPLt i. :sotd)

RELAP4 PREDICTED PUMP f.tARACTERISTICS COMPARED WITH TEST DATA

Void Predicted MeasuredFrac tion Tit T (a) T (a )

(%) Mt (a) (t14 - t29) (N-m) (N-m) (N-m)

0 0.00 0.97 491.9 491.9 471.8

5 0.03 0.97 491.2 476.5 458.1

10 0.06 0.97 488.9 459.5 432.2

15 0.10 0.96 486.1 437.6 404.30

20 0.33 0.95 484.6 326.1 374.1

25 0.56 0.95 466.4 197.5 339.9

30 0.56 0.94 463.0 196.9 299.9

35 0.56 0.92 453.4 192.4 248.0 El?5S4,'?-

. .

LTR-LO-00-79-110

TABLE V

COMPARISON OF TdE VARIOUS PUMPS RATED OPERATING CHARACTERISTICS

Pump Rated Rated Rated Rated Specific SpeedType Flow Head Speed Torque

/H '75)(nQ *50 0(1/s) (m) (rpm) N-m

Semiscale 11 59 3560 47 550

__

LOFT 315 96 3530 500 2043

CE/EPRI 221 77 4500 418 2574

MCP 284 68.6 3600 506 2540

_-

18

. .

LTR-LO-00-79-110

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N;) ,g--y"GL.3

\ s L TE 27-

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INEL A-9248FIGURE 1. FAST LOOP FACILITY SCHEMATIC

19

. .

LTR-LO-00-79-110i

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