ML20093N161

Once-Through Integral Sys Hot Leg High Point Vent Test 240100

ML20093N161
Person / Time
Site:	Crystal River
Issue date:	07/31/1984
From:	BABCOCK & WILCOX CO.
To:
Shared Package
ML20093N159	List: 3F1084-11, Requests Permanent Exemption from Installation of Reactor Vessel Head Vent.Vent Unnecessary Penetration of Reactor Primary Coolant Sys When Hot Leg High Point Vents Can Be Used ML20093N161 ML20093N168 ML20093N172
References
12-1152307, 12-1152307-00, 240100, NUDOCS 8410310434
Download: ML20093N161 (200)

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OTiS Hot Leg

, High Point Vent Test

1. 240100 l

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Florida Power Corporation Sacramento Municipal Utility District

• n Ra88R4J848!!2 e

9 JULY 1984 von 12 11s23o7 00 Babcock & Wilcox

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! OTIS GAS TEST 240100:

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! Preliminary Results i ,

B&W Doc. No. 12-1152307-00 l 8 June 1984 l

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i LEGAL NOTICE This report was prepared by the Babcock & Wilcox Company as an account of work. sponsored by Florida Power Corporation and Sacramento Municipal Utili-ty District. No persons acting on behalf of the Babcock & Wilcox Company, Florida Power Corporation, or Sacramento Municipal Utility O' trict:

1. makes any warranty, express or implied, with respect to the use of any information, apparatus, method, or process disclosed in this report or that such use may not infringe privately owned rights; or

2. assumes any liabilities with respect to the use of, or for dam-ages resulting from the use of any information, apparatus, meth-od, or pro' cess disclosed in this report.

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ABSTRACT This is an initial report for OTIS Test 240100 using preliminary data. The test examines the effectiveness of the hot leg high point vent and of plant venting procedures, with a gas-laden primary system. Test execution is as planned. Vent actuation and associated procedures restore natural circula-tion and support a rapid cooldown of the primary system.

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CONTENTS Page

1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

2. SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 2-1

3. TEST DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.1. Background . . . . ... . . . . . . . . . . . . . . . . . . . 3-1 3.1.1. Introduction . . . . . . . . . . . . . . . . . . . . 3-1 3.1.2. Te s t Desc ri p ti o n . . . . . . . . . . . . . . . . . . 3-1

, 3.1.3. Initialization . . . . . . . . . . . . . . . . . . . 3-3 3.1.4. Initiation and Conduct . . . . . . . . . . . . . . . 3-5 3.1.5. Post-Test NCG Accounti ng . . . . . . . . . . . . . . 3-7

-3.2. Performance . . . . . ................... 3-8 3.2.1. - Ini ti al i zation . . . . . . . . . . . . . . . . . . . 3-8 3.2.2. Conduct . . . ................... 3-9

.js 3.2.3. Me a s u r e me n t s . . . . . . . . . . . . . . . . . . . . 3-9

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3.2.4. Summary . . . ................... 3-10

3.3. Observations . . . . . . . . . . . . . . . . . . . . . . . . .

3-11 I 3.3.1. Initialization Phase, 0 to 310 Minutes . . . . . . . 3-11 3.3.2. Initiation, 312 Minutes .............. 3-14 3.3.3. Constant-Pressure Phase .............. 3-16 3.3.4. Depressurization Phase, 381 to 540 Minutes . . . . . 3-16 3.3.5. Stabilization Phase ................ 3-18 3.4. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . 3-18 D 4.

SUMMARY

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- 5. REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1 APPENDIX '- Data Plots . . . ................... A-1 r~~

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List of Tables l Table Page t

3-1. Initial Conditions ...................... 3-20 3-2. Operator Comments . . . . . . . . . . . . . . . . . . . . . . . 3-21 3-3. Unavailable Measurements ................... 3-24 3-4. Gas Additions . . . . . . . . . . . . . . . . . . . . . . . . . 3-25 List of Figures Figure 2-1. OTIS General Arrangement . . . . . . . . . . . . . . . . . . . 2-9 a 2-2. Leak Flow Control Orifice Assembly . . . . . . . . . . . . . . 2-10 J 2-3. Leak Flow Control Orifice .................. 2-11 2-4. Guard Heater Concept . . . . . . . . . . . . . . . . . . . . . 2-12 2-5. Reactor Vessel and Downcomer General Arrangement . . . . . . . 2-13 2-6. Reactor Vessel and Downcomer Instrumentation . . . . . . . . . 2-14 2-7. Hot Leg Instrumentation -- Temperature Measurements, Conductivity Probes and Viewports .............. 2-15 2-8. Hot la Instrumentation -- Differential Pressure Measurements . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2-9. OTSG Temperature Measurements and Tube Support Plate Elevations . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 2-10. OTSG Pressure and Differential Pressure Measurements . . . . . 2-18 2-11. Cold Leg Piping -- Temperature and Flow Measurements, Location of High Pressure Injection and Cold Leg Leaks . . . . 2-19 2-12. Pressurizer Instrumentation ................. 2-20 3-1. 3-la. Primary and Secondary Pressures . . . . . . . . . . . . 3-26 3-lb. Average Fluid Temperatures .............. 3-27 3-Ic. Collapsed Liquid Level s . . . . . . . . . . . . . . . . 3-28 3-id. Approximate Reactor Vessel Void Fractions . . . . . . . 3-29 3-le. Reactor Vessel Fluid Temperatures . . . . . . . . . . . 3-30 3-1f. Downcomer Fluid Temperatures ............. 3-31 3-1g. RVVV Fluid Temperatures . . . . . . . . . . . . . . . . 3-32 3-2. 3-2a. Primary and Secondary Pressures . . . . . . . . . . . . 3-33 3-2b. Collapsed Liquid Tends ................ 3-34

[ . 3-2c. P rima ry Fl owra tes . . . . . . . . . . . . . . . . . . . 3-35

( 3-2d. Seconda ry Ra tes . . . . . . . . . . . . . . . . . . . . 3-36 3-2e. Cold Leg Fluid Temperatures . . . . . . . . ..... 3-37 3-2f. Approximate RV Void Fractions . . . . . . . . . . . . . 3-38 3-29 RV Fluid Temperatures . . . . . . . . . . . . . . . . . 3-39 3-2h. Hot Leg Fluid Temperatures .............. 3-40 3-21. Downcomer Fluid Temperatures ............. 3-41 3-2j. RVVV Fluid Temperatures . . . . . . . . . . . . . . . . 3-42 9

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V Figure Page 3-3. 3-3a. Loop NCG Volume . . . . . . . . . . . . . . . . . . . . 3-43 3-3b. Apparent Loop NCG Volume ............... 3-44 3-4. 3-4a. Primary and Secondary Pressure ............ 3-45 3-4b. Average Fluid Temperatures .............. 3-46 3-4c. Collapsed Liquid Trends . . . . . . . . . . . . . . . . 3-47 3-4d. Primary Boundary Flowrates .............. 3-48 4e. RV Fluid Temperatures . . . . . . . . . . . . . . . . . 3-49 3-5. Primary Pressure -- Temperature Trends . . . . . . . . . . . . 3-50 3-6. 3-6a. Primary and Secondary Pressures . . . . . . . . . . . . 3-51 3-6b. Average Fluid Temperatures .............. 3-52 3-6c. Collapsed Liquid Trends . . . . . . . . . . . . . . . . 3-53 3-6d. Downcomer Fluid Temperatures ............. 3-54 m

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1. INTRODUCTION This is an initial report of OTIS Test 240100 using preliminary data. The test uses the hot leg high point vent and the associated (revised) plant procedures, adapted to OTIS, to restore natural circulation and to cooldown the primary within the specified pressure-temperature envelope. OTIS (Once-Through Integral System) is a single hot leg and single cold leg simu-lation of a raised-loop plant of B&W design, section 2. Adaptation of OTIS for this test related to lowered-loop plants of lesser rated power requires scaling compromises and adjustments, cf. section 3.1.

The test is initialized accordi ng to the procedure in section 3.2.1. A final initialization gas injection to the hot leg U-bend voids that region, (Q interrupts loop fl ow, and triggers test initiatinn as planned. The loop burden of noncondensibles at initiation is approximately 30 scf; injected and recovered gas volumes indicate gas closure to roughly 10% of the total injected volume, seci.lon 3.2.3.

The operator invokes recovery procedures, based on those of SMUD, immedi-ately upon test initiation, section 3.2.2. The loop condition measurements throughoat test initialization and conduct pennit extensive tracking of sys-tem intarvtions, sec t. ion 3.2.3. The post-initialization interactions are conveniently subdividsd according to sequential testing phases (sections 3.3.2 through 3.3.5): Initiation (at 312 minutes after data acquisition system activation); a *:onstant-pressure venting and cooldown phase; a de-pressurization phase; and a final, low pressure cooldown and stabilization period. The cooldown proceeds at an average rate of 60F/h, with rates some-times approaching 100F/h. The gas removal rate is greatest initially, and during the later portions of the cooldown and depressurization phase. Con-ditions are maintained within the specified pressure-temperature envelope throughout the venting and cooldown evolutions. The results satisfy the test objectives of demonstrati ng the ability of the hot leg high point Q

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vent, in conjunction with operator actions based on those of the plant op- ,

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erator, to vent excess noncondensibles, to restore circulation, and subse- 1 2 quently to cool the system while approximately maintaining the specified pressure-temperature limits.

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I 2.0 ' SYSTEM DESCRIPTION 7

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V OTIS is an experimental test facility at B&W's Alliance Research Center, designed to evaluate the thermal / hydraulic conditions in the reactor coolant system and steam generator of a raised-loop B&W reactor, during the natural circulation phases of a Small-Break-Loss Of Coolant Accident (SBLOCA). The test facility is a scaled 1x1 (one hot leg, one cold leg) electrically heated loop simulating the important features of the plant. The facility is used to perform separate effect and integral system tests at simulated scaled power levels of 1 to 5%.

The loop consists of one 19-tube Once-Through Steam Generator (OTSG), a simulated reactor, a pressurizer, a single hot leg, and a single cold leg. Reactor decay heat following a scram is simulated by electrical heaters in the reactor vessel.

No pump is included in the basic system, but a multipurpose pump in an isolatable cold leg bypass line may be used to provide forced primary flow. The test loop is full raised-loop plant elevation, approximately 95 feet high, and is shortened in the horizontal plane (to approximately 6 feet) to maintain approximate volumetric scaling.

'\"l Other primary loop components include a reactor vessel' vent valve (RVVV), pressur-izer power-operated relief valve (PORV).or safeties, and hot leg and RV high point vents. Auxiliary systems are available fce scaled high oressure injection (HPI),

controlled primary leaks in both the two-phase and single-phase regions, a secondary forced circulation system for providing auxiliary feeowater ( AFW) to the OTSG, steam oiping and pressure control, a cleanup system for the secondary 1000, gas addition, and gas samoling.

Scaling The confiauration of the test loop is dictated by scaling considerations. The four scaling criteria used to configure OTIS, in order of priority, are:

o Elevations o Post-SLBOCA Flow Phenomena o Volumes i

)o Irrecoverable Pressure loss Characteristics 2-1

A more detailed discussion of the scaling considerations is presented in Reference

3. OTIS power and volume scaling originates with the size of the model 0TSG. The model OTSG contains nineteen (19) full-length and plant-typical tubes, which represent the 16013 tubes in each of the two steam generators used in the 205-FA plants. Therefore, the dominant power and volume scaling in the loop is:

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Scaling Factor = 1 2 x 16013 l'6EB"-

The distance between secondary faces of the lower and upper tubesheets in the 19-tube OTSG is full length. Auxiliary feedwater nozzles are located in the model steam generator at two elevations. The tubesheet thicknesses in the model OTSG are not plant-typical, and the model inlet and outlet plenums are reducers.

Therefore, the hot leg-to-steam generator inlet and steam generator-to-cold leg lengths are atypical. Piping runs beyond the steam generator and plenums are used

, to retain plant-typical elevations.

The hot leg inside diameter is scaled to creserve Froude number, and thus the ratio of inertial to buoyant forces. This criterion is considered to preserve two-phase flow regimes and reflooding phenomenon according to certain correla-

, tions. Scaling with Froude number results in a hot leg diameter twice that indi-cated by ideal volumetric scaling. Although this adds approximately 20% to the ideal system (total loop) volume, this choice of hot leg inside diameter is considered most likely to avoid the whole-pipe sluggino behavior observeo in other scaled SBLOCA test facilities.

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The spillover elevation of the plant hot leg U-bend is retained in OTIS Dy match-ing the elevations of the bottom (inside) of the plant and model hot leg U-bend pipes. The radius of the U-bend obtains exact volumetric scaling.

The pressurizer in OTIS is volume and elevation scaled. The elevation of the bottom of the pressurizer is plant typical, as is the spillunder elevation of the pressurizer surge line. The centerline elevation of the hot leg-to-pressurizer surge connection matches that of the plant.

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An electrically heated reactor vessel provides heat input to the primary fluid to a simulate reactor decay heat levels up to 5% scaled power. Based on a plant power U rating of 3600 mwt, 1% of scaled full power in OTIS is 21.4 kw. The model core heat input capacity is 180 kw. OTIS primary flow scaling obtains 1% of scaled full flow = 0.259 lbm/s; on the secondary side,1% of scaled full secondary flow =

0.0265 lbm/s.

The annular downcomer of the plant reactor vessel is simulated by a single exter-nal downcomer in OTIS. The spillunder elevation in the horizontal run at the bottom of the model downcomer corresponds to the elevation of the uppermost flow hole in the plant lower plenum cylinder. The OTIS reactor vessel consists of three regions: a lower plenum, a heated section, and an upper and top plenum.

The center of the heated length of the core vessel corresponds to the center of the active fuel length in the plant core. The core region of the model reactor vessel contains excess volume due to construction constraints; therefore, to maintain the total reactor vessel scaled volume, the reactor vessel is shorter than plant-typical. Non-flow lengths were sacrificed to maintain reactor vessel scaled volume.

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The model cold leg does not contain an in-loop pumo, since OTIS is designed to simulate the natural circulation phases of a SBLOCA. A flange is provided in the cold leg piping upstream of the reactor coolant pump spillover point to admit a flow restrictor which simulates the irrecoverable pressure loss characteristic of a stalled reactor coolant pump rotor.

The model cold leg originates at the lower plenum of the 19-tube OTSG and extends downward to match the spillunder elevation of the plant cold leg. The highest point in the cold leg (the spillover into the sloping cold leg discharge line) 7N 2-3 i _

matches the reactor coolant pump spillover elevation in the plant. Because horizontal distances are shortened in OTIS, the slope of the cold leg discharge line is atypically large.

i OTIS atypicalities are summarized as follows:

o OTIS is predominantly a one-dimensional, vertical system, due to the shortened horizontal distances and small cross sections of the various components such as steam generator and reactor vessel.

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0 Because of the small size of the piping used in the model, the ratio of loop piping wall surface to fluid volume is approximately 20 times that of the plant. Therefore, the fluid and wall-surface temperatures are much more closely coupled than those of a plant.

o In high-pressure models, the ratio of metal volume to fluid volume increases as the model piping is made smaller. The ratio of model metal volume to fluid volume in OTIS is approximately twice that of the plant.

The pipe surface to fluid volume ratio atypicality of scaled facilities results in higher heat losses in the scaled facilities than in the plants. This atypicality can be minimized by using both guard heaters and passive insulation on the model H piping. Guard heating is used for the OTIS hot leg, pressurizer, surgeline, and

- RV upper head.

The OTIS secondary system orovides the steam generator secondary inventory, and those fluid boundary conditions which impact SBLOCA phenomena. These include steam generator level control, auxiliary feedwater, and steam pressure control valves.

4 The OTIS instrumentation includes pressure and differential-pressure measurements; thermocouple (TC) and resistance temperature detector (RTD) measurements of fluid, metal, and insulation temperatures; level and phase indications by optical-ports and conductivity probes as well as by differential pressures; and pitnt tubes and flowmeters for measurements of flowrates in the loop. In addition to these O

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1 measurements, loop boundary conditions are metered: HPI, HPV (hot leg and RV),

(controlled) leak, PORV, and secondary steam and feed flow are measured; noncon-

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V -densable oas (NCG) injections are controlled and metered; NCG discharges with the two-phase primary effluent streams are measured; and the aggregate primary effluent are cooled and collected for integrated metering. OTIS instrumentation consists of approximately 250 channels of data which are processed by a high-speed data acquisition. system. The data acquisition rate can be either event-actuated or adjusted by the loop operator to acquire and store a full set of data as often as every 5 seconds. Instruments are described further in Section 4 of the appendix.

Features OTIS consists of a closed primary loop, closed secondary loop, and several auxil-iary systems. A general arrangement showing the relationship of the key compo-nents of these systems is shown in Figure 2-1. The key features are:

o Multiple leak locations,

.A o Guard heating, o Scaled high pressure injection (HPI),

o Simulated reactor vessel vent valve (RVVV),

o OTSG level control, o Automatic cooldown, and o Hign and low elevation auxiliary feedwater addition.

Multiple leak locations in OTIS allow a controlled SBLOCA. Controlled leaks are located at the bottom of the lower plenum of the reactor vessel, in the cold lec upstream of the simulated reactor coolant pump (RCP) spillover, in the cold leg downstream of the RCP spillover, a high point vent (HPV) at the top of the hot leg U-bend (HLUB) and in the RV upper head, and a simulateo pilot operated relief valve (PORV) at the top of the pressurizer. Leak flow b controlled by an orifice located just downstre.am of the leak site. The leak flow control orifice is

. located in a 5/8" diameter tube as shown in Figure 2-2, to form the leak flow control orifice assembly. The details of- the orifice design are illustrated in Figure 2-3. Scaled leaks of 10 cm2 and 15 cm2 were tested in the single phase regions (cold leg leaks), while ~10 cm2 leaks were tested at the PORV. The l .

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Figure 2-3. Scaled leaks of 15 cm2 and 20 cm2 were tested in the single phase ,

regions (cold leg leaks), while 10 cm2 leaks were tested at the PORV. The actual diameter of the scaled leak was obtained from the ideal volume scaling factor of 1686. Thus a scaled leak of 10 cm2 has a diameter of 0.034 inches in OTIS.

To preclude leakage from the loop, sealed stem valves were used where possible throughout the loop. Additionally, all instrument fittings in the reactor coolani L system, above the top of the core heaters were seal welded. To characterize the leak tightness of the loop, a heliun leak check was perfonned.

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As a result of the large surface area to fluid volume ratio, heat loss in the loop

/ was proportionally greater than that in a plant. To minimize this effect, guam h aters were used along the hot leg piping, pressurizer, surge line, and RV upper

inad. The objective of the guard heating system was to provide heat to the components in an amount equal to heat loss of that component to ambient. The q , concept used for guard heating is illustrated in Figure 2-4. A layer of control j.

l insulation, approximately 1/2" thick, enclosed by a thin shell. of stainless steel lagging, was placed over the pipe sections to be guard heated. The heater tapes h

l were spirally wrapped over the laggine material, covering nearly 100*. of the pipe I

1 section. Two layers cf passive insulation tNn covered the guad heaters. The e

heaters were controlled based on thermocouples located on the pipe OD and at a l

j point mid-way into the control insulation. Tests were performed to evaluate the

heat loss from the loop and to characterize the operation of the guard heaters.

Two high pressure injection (HPI) locations were provided - one at the cold leg low point, upstream of the simulated OCP spillover, the other in the downward sloping cold leg, downstream of the simulated RCP spillover. A scaled HPI flow l' was provided by a positive displacement pump. The flow into the loop was controlled to simulate the scaled head-flow curves of the plant pumps. HPI flow was directed exclusively to the cold leg discharge piping.

, The reactor vessel vent valve (RVVV) was simulated by a single pipe extending from

, the upper and top plenum of the reactor vessel to the external downcomer. The u

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r v;ssel and downcomer reached preset values. A vertically-oriented slit orifice in

, >he pipe, downstream-of the valve, set the flow through the simulated vent valve.

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Th2 secondary loop consisted of the 19-tube OTSG, steam piping, a water cooled condenser, hot well, feedwater pump, feedwater heater, and feedwater piping. The s:condary side simulation of the plant was limited to the steam generator and the elcyation of the auxiliary feedwater (AFW) inlets. Additionally, several control functions were used to simulate plant performance. These included:

o Continuousclevel (inventory) control, o Band-level control, o Steam pressure control, and o Automatic cooldown.

Two modes of steam generator level control were available, continuous level control and band level control. With continuous level control, the operator set the desired ~ steam generator level from 0 to 100%. The controller maintained the collapsed water. level at this setpoint by adjusting the feedwater flowrate. The ggnal for the collaosed-level, for both modes of level control, was based on a

%ifferential pressure measurement.

The secondary loop could operate at steam pressures of approximately 200 to 1200

-psia. Steam pressure was automatically controlled by a steam control valve, based on a'sional from the steam pressure transmitter. In addition to automatic steam pressure control, the steam pressure could be controlled to decrease at a pre-cro-gramed rate. This feature allowed simulation of a plant-operator-controlled cooldown. The desired cooldown rate was keyed into the controller as a series of linear segments of pressure versus time. When activated, the steam pressure

. control valve modulated to obtain the stipulated depressurization.

Auxiliary feedwater addition could be made at either of two locations in the steam

_ generator - at a high feed elevation, typical of the B&W domestic plants, and at a low.' feed elevation. The AFW nozzle at each elevation could be configured for

maximum wetting or for minimum wetting of the steam generator tubes. The two configurations allowed comparison of the effects of a spray pattern on heat f3

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- transfer (typical of the outer rows of tubes near the AFW nozzles in the plant),

to the effects of pool heat transfer (typical of the large majority of tubes that are away from the AFW nozzles in the plant).

The OTIS arrangement and instrumentation are further illustrated in the fol-lowing figures:

Figure 2-5 Reactor Vessel and Downcomer Arrangement Figure 2-6 Reactor Vessel and Downcomer Instrumentation Figure 2-7 Hot Leg Instruments: Temperatures, Conductivities, and Viewports Figure 2-8 Hot Leg Instruments: Differential Pressure Figure 2-9 OTSG Temperature Measurements Figure 2-10 OTSG Differential Pressures f

Figure 2-11 Cold Leg Piping Figure 2-12 Pressurizer The instrument indications are tabulated in the final pages of the appendix.

L This tabulation is arranged by component, instrument type, and elevation.

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o MLMRO1 MLUS VIEWPORT MLTC11 MLCP12 MLTCOS - 300 MLCP13- PS11 MLCP14 - - MLCP10 MLTC07 l MLTCOs

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MLCP15 - - MLCPOS MLCP16 - - MLCPOS

1. 5 75 MLTCOs - 600

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, /~N 1 b MLTCo4 f=

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MLTC03

- 200 MLCP02 --

l MLTCO2 l  % MLTC01  % _q, l

1 MLCP01 - m MLR701 -0 MLcP17 -

x A l

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' Figure 2-7. Hot Leg Instrumentation - Temperature Measurements. .

Conductivity Probes and Viewports 2-15 e . ._.

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- 800 MLDPC3

- 700

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Figure 2-8. Hot Leg Instrumentation - Differential Pressure Measurements 2-10r

PRIMARY INLET 1I SPRT01. SP'tT02 TUBE ,P 7 ] puPPER TURESHEET ,

SUPPORT 42- ,

N 49'.9" - SSTC25 l

" 47*-0" - SSTC23. SSTC24

1. O~ --- 44'.2" - SSTC21. SSTC22 42*.8" ,__ 43 .3" - SSTC19. SSTC20 38*.S" "--

38*.2" - SPTC01. SSTC17. SSTC18. SMTC05 36'-8" --- 35'-4" - SPTCO2. SSTC15. SSTC16 33'.10" --- 32* 4" - SSTC13. SSTC14. SMTC04 ,

10" ---

. 29'-3" - SSTC11. SSTC12. SMTC03 U8~ --- 28'.4" - SSTC09.' SSTC10. SMTCO2 24'.10" -~~

23'.2" - SSTCOS O 21 '.S" ---

20'.2" - SPTCO3. SSTC07. SMTC01 13'.3" --- 17*.4" - SPTC04. SSTC06 15*.10" "~"

14'.2" - SSTC05 12'.8" ~~~

11 *.1" - SSTC04

- S'.7" " " " "

8'-1" - SPTC05. SSTCO3 s'.7" --"

4'-11" - SSTCO2 3'.5" ,__

1'.4" - SSTC01 0 - REFERENCE LINE 7 TOP OF LOWER TUSESHEET LOWER

/ {',\ 9: SPRT03.SPRT04 TUSESHEET l m l .

U PRIMARY OUTLET 1

O OTSG Temperature Measurements and l Figure 2-9.

l Tube Support Plate Elevations 2-17

l' I

PRIMARY If W SPMt01 4 6 s3s 3/4" gg ._ ._. .

TuSEsHEET PSM01

- $14"

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- 347 3/4" SsDPOS

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377 1/2" h

- ssoPot l' tower

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- o tREFEREPdCE) i o

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l Figure 2-10. OTSG Pressure and Differential Pressure Measurements h

2-18 i

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= 40 D

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Figure 2-11. Cold Leg Piping - Tenperature and Flow Measurements.

Location of High Pressure Injection and Cold Leg Leaks 2-19 7

I 1

l l

O t . 400 I PRTC04 - -MTC03

~ *

-PR OT03 C PRPR01 e I.

i PRTC05 -

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r Figure 2-12. Pressurizer Instrumentation l

2-20

m i

3. TEST DESCRIPTION 3.1. Background 3.1.1. Introduction -

This test applies (revised) SMUD hot leg high point venting and natural cir-culation cooldown procedures to OTIS. It is intended to demonstrate the ability of these procedures to cool and depressurize the p,rimary from ap-

. proximately 600F and 2000 psia initial conditions to conditions at which the DHS (Decay Heat System) would be activated, approximately 280F and 250 psia. This cooldown is to be performed with a burden of -NCG (noncondens-ible gas) in the primary.

3.1.2. Test Description The initial conditions assume that inadequate core cooling has occurred during a LOCA, such that significant volumes of NCG have been evolved. The operator has used HPI to cool the core and to partially refill the system, but the HLUB (Hot. Leg U-Bend) and RVUH (Reactor Vessel Upper Head) remain gas filled. AFW has become available, the operator intends to restore subcooled natural circulation (SNC) to cool the primary.

The relevant SMUD procedures are:

0.5 Loss of Reactor Coolant / Reactor Coolant System Pressure C.47 Inadequate Core Cooling C.48 Loss of Subcooled Natural Circulation (to be revised)

Referring to these procedures, D.5 and C.47 precede the conditions at which this test is initialized, at the start of this test C.48 is instituted to regain subcooled natural circulation (SNC) and to cooldown the primary sys-tem. Only those portions of the plant procedures which are relevant to i OTIS are invoked herein. Only those OTIS indications which simulate those of the plant are to be used for test control after test initiation.

i 3-1 u __

It should be noted that OTIS elevations replicate those of a raised-loop plant, the model steam generator is approximately 25 feet higher relative to the centerline of the simulated core than are the corresponding SMUD components. The OTIS SG secondary level is to be raised to 10' after test initiation, rather than apprcximately 30' which would simulate the SMUD pro-cedure, to partially offset this elevation difference. Also, OTIS simu-lates a single controlled discharge from the top of the model pressurizer.

The use of this discharge path t.o simulate the pressurizer vent precludes simulation of the PORY in this OTIS test.

OTIS Vent Size The size of the OTIS HLHPV (Hot Leg High Point Vent) governs its venting

( rate; it is thus important to the typicality of the test. Sizing the model HPV involves the OTIS general scaling factor,1686, which was derived for a 205 fuel assembly plant (cf. Appendix A of reference 4). This scale factor

{

obtains a model power of 21.4 kW per percent full power for simulation of a 3600 MW plant. Retaining the same model power equivalency, the plant bound-ary flow areas must be adjusted for plant rated power levels other than 3600 MW. The SMUD rated power level is 2772 MW, thus its boundary fl ow areas must be increased by 3600/2772 = 1.30 before scaling them to OTIS (us-ing the general OTIS scaling factor, 1686). The (flow-limiting) flow area

[ of 2 SMUD HLHPV's is 1.91 cm 2 , thus the power-adjusted area to be scaled in OTIS is 1.3 x 1.9 = 2.5 cm .2 For FPC, rated power is 2544 MW and the area of 2 HLHPV's is 1.4 cm2 . The area adjustment factor is then 3600/2544 =

( 1.42 and the adjusted area to be scaled in OTIS is 1.4 x 1.42 = 2 cm2 For this single HLHPV-effects test, OTIS employs a compromise vent size, which is intennediate to the two ideal areas, 2.11 cm 2/1686. This is 15% less than ideal for simulation of the SMUD vents and 6% greater ttan ideal for FPC. This compromise area is perceived to be adequate for the assessment of venting effects for both plants.

Nitrogen Versus Hydrogen l

OTIS employs nitrogen to simulate the plant noncondensibles, predominantly hydrogen. N2 di f fers from H2 in both soluability and densi ty . H2 15 roughly twice as soluable as N2 , the volumes of gas dissolved in the loop fluid differ by a like amount. Because only 20% of the initial loop burden h 3-2

[ - -

77 of NCG is ' dissolved nitrogen (versus 35% using hydrogen), this solubility D ~ difference is acceptable, The density of nitrogen is similar to that of steam, ..itrogen is somewhat more dense than steam at saturated conditions below approximately 1800 psia. Hydrogen, on the other hand, is roughly one-tenth as dense as steam.

This. difference between the relative densities of nitrogen and steam, and that of hydrogen and steam, has little apparent impact on transport pro-cesses; such transport processes occur throughout the primary loop during natural circulation of liquid with dissolved and/or entrained NCG. Separa-tion processes governed by buoyant forces are sensitive to relative density differences, however. With vapor at the HLUB region, the relatively dense nitrogen tends to be segregated toward the lower voided elevations and thus to the less readily vented (from the high point) than a higher noncondens-ible such as hydrogen. Testing with nitrogen is thus conservat{ ve by this consideration. With voiding in the upper RV, on the other hand, the rela-tively dense nitrogen gravitates toward the lower voided elevations and is more readily swept out of the RV upper head. The use of helium rather than nitrogen to simulate hydrogen is desirable on the basis of relative densi-

ties. But helium is much more difficult to contain than nitrogen, render-ing closure on gas inventory unlikely. For this reason, nitrogen is re-tained as the NCG for OTIS simulation of hydrogen.

3.1.3. Initialization Initialization obtains a hot and NCG-laden primary system. NCG additions are performed in three steps, the last of which (HLUB injection) triggers test initiation. The secondary is to be initialized at 1300 psia with a 5' level and high-elevation AFW injection. (Secondary pressure is initialized relatively high to elevate the initial primary fluid temperature at sustain-i ing power). The primary is initially at appros.imately 1700 psia on pressur-izer pressure control. Core power is at the sustaining level (approximate-ly 1/2% of scaled full power,1% = 21.4 kW). Initial pressurizer level is low, approximately 5'. During initialization, the pressurizer heaters are controlled to maintain an approximately adiabatic pressurizer. The RVVV is in automatic control with open/close setpoints of 0.25/0.125 psi.

O 3-3

I l The initialization steps are described in detail in the following section.

Saturate Primary Fluid With NCG Add nitrogen to the primary in approximately 1 scf increments using a loop dddition site other than that of the reactor vessel (to minimize gas col-lection in the RVUH before saturating the loop fluid). Continue this incre-mental injection into the loop, allowing primary system pressure to in-crease, until the primary liquid inventory is apparently saturated at approximately 2000 psia system pressure. Base the approach to saturation on the volume of gas injected and on the behavior of Pr level and primary pressure. The volume of nitrogen required to saturate the primary liquid inventory at the final pressure of approximately 2000 psia is 10 to 15 scf.

The Pr level is expected to increase roughtly 1/2' at each addition, then to subside to its initial level with gas dissolution.

Displace RVUH Liquid With NCG L Manually close the RVVV (the internals vent valve simulation). Inject ni-trogen to the reactor vessel gas addition site, to displace the RVUH liquid inventory with NCG. Approximately 30 scf of NCG are required to void the RVUH down to the RVVV elevation, inject this 30 scf in relatively large in-

~

crements to minimize sweeping of the injected gas out the hot leg. Pause between i njections to allow primary pressure to subside. Continue these incremental injections until the RV collapsed liquid level approaches the elevation of the RVVV (the RVVV elevation is +0.6' relative to the SGLTSUF, Steam Generator Lower Tube Sheet Upper Face). If necessary, momentarily L close the cold leg throttle valve during each of these injections to mini-mize sweeping of NCG into the hot leg. (The cumulative loop burden of NCG h will now be approximately 30 scf.)

F Pressurizer level will increase by 10 to 15 feet during these injections.

] Modify this injection sequence as required to cause RVUH voiding without significant HLUB voiding. Following this NCG injection sequence, return j the RVVV control to automatic actuation on differential pressure.

O

! 3-4 L

~

Void HLUB With NCG Inject approximately 5 scf .of nitrogen at the HLUB. Verify that the hori-

zontal run of the HLU8 is . completely voided by monitoring the HLUB view-point. If the HLU8 has not yet voided, continue NCG injections to the NLUS. After the HLUB has voided: Start a primary pressure-temperature plot, increase core power to 1% of scaled full power greater than ambient

. losses (1-1/21 total), and immediately initiate the test.

3.1.4. Initiation and Conduct p

Test initiation immediately follows the final initialization step, the void-

i' ing of the HLUB with NCG. Test. initiation begins with the - restoration of 1 $NC (Subcooled Natural Circulation). With SNC verified, cooldown as out-

[ lined. If SNC is lost during this cooldown (using the SNC verification cri-y teria) take appropriate acti'on to restore SNC. The system is to be cooled i in this fashion until Decay Heat System cooling can be instituted, i.e.,

}' primary temperature 1280F and primary pressure approximately 250 psia. The j- entire cooldown and depressurization is to adhere to the SMUD P-T envelope; i for TRCS 1500F, this P-T envelope may be approximated by the fluid tempera-

, tures between Tsat-50F and Ts at-100F.

! The automated secondary depressurization system avsilable in OTIS may be used to perform the cooldown specified in the following sectionr. Through-out the test, approximate the SMUD AFW head-flow characteristics by limit.

I ing the OTIS AFW flowrate versus pressure to that given for the OTIS simula-tion of Davis Besse AFW (cf. the OTIS Test Specifications,4 Figure A-6b,

! curve "D8"). ' Approximate the SMUD HPI head-flow characteristics; LPI simulation is unnecessary for this test. t The OTIS procedures herein are ' derived from SMUD procedures:

OTIS Procedure Corresponding SMUD Procedure Restore SNC C.48 Loss of SNC

• Verify SNC C.48 and B.4 Section 6.1.2 and .3  :

j SNC Cooldown C.48 - Revised l 4

i 3-5 i  !

t Restore SNC (Procedure C.48)

1. Increase primary system pressure to the maximum pressure allowed by the P-T envelope using throttled HPI, Pressurizer heaters may be used to assist pressurization. Note: Do not exceed 2300 psia primary system pressure. The method of primary system depressurization, beyond that 7

supplied by venting, cool down, and adjusting HPI, is by opening the

{ pressurizer vent, and by actuating pressurizer spray flow supplied by diverted HPI; limit this pressurizer spray flow to less than 0.01 f lbm/sec.

2. Raise the SG 1evel to approximately 10' using >1/3 gpm (0.04 lbm/s or 27, of full secondary flow) AFW flowrate.

- 3. Depressurize the SG secondary to obtain 100F/h secondary cooldown rate.

Note: Do not exceed 100F/h primary system cooldown rate.

4. Open the HLHPV (Hot Leg High Pcint Vent) and keep it open.

5. Verify SNC using Section 3.2. When SNC is verified, cooldown using the procedure of section 3.3.

Verify SNC (Procedure B.4, Section 6.1.2 and 3) O

[' The steps herein are used to verify SNC (subcooled natural circulation).

If SNC can not be verified, restore SNC. When SNC is verified, cooldown.

o Plot Teore, T hot. Tcold and Tsec sat (SG secondary saturation temperature at steam pressure) versus time to perform these verification steps:

F 1. TRCS > 50F subcooled.

2 (TH ot - TCold) .1100F.

3. Tgot and TCore rise approximately 35F above Tcold and, af ter approxi-mately 15 to 30 minutes, begin to track Tcold*

4. TC old remains steady or decreases slightly, and is equal to or slightly

]

greater than Tsec sat'

5. TC old tracks Tsec sat-

6. Tgot and TC old track changes in pSG :ec' 3-6

7. THot and TCold are approximately equal and have similar trends.

[Gl SNC Cooldown (Procedure C.48 Revised)

1. Continue to verify SNC. If SNC is lost, restore SNC.

2. Cooldown the primary at approximately 100F/h by regulating the sec-ondary system cooldown rate. Note: Do not exceed 100F/h primary sys-tem cooldown rate.

3. Depressurize the primary system in steps not to exceed 70 to 100 psi, l to remain within the P-T envelope. The method of depressurization (beyond that provided by venting, cool down, and adjusting HPI) is by opening the pressurizer vent, and by actuating pressurizer spray sup-plied by dive.*ted HP!; limit spray flow to less than 0.01 lbm/s. Pres-sure control and/or repressurization is accomplished using throttled HPI as augmented by pressurizer heater actuation. Note: keep the HLPHV vent open.

4. Control pressurizer level at approximately 12 i 5' using throttled HPI, but only as permitted within the P-T envelope.

i S. Continue primary cooldown and depressurization within the P-T band until TRCS 1280F and ppgt < 250 psia, i.e., to the DHS actuation conditions.

3.1.5. Post-Test NCG Accounting Determine the NCG volume remaining af ter the completion of testing. Com-pare this volume and the volume collected during testing to the volume of NCG injected considering initial and final dissolved gas concentrations.

Required Instruments The instrumentation requirements of this test correspond to those of the several OTIS tests, cf. Appendix B of the OTIS Test Specifications.4 In ad-dition to these measurements, the NCG-specific measurements are required, i.e., injection and collection times, amounts, and conditions.

3-7 L

3 3.2. Performance Test initialization, conduct, and measurements are compared to their speci-fications in the following paragraphs.

{

3.2.1. Initialization OTIS was initialized to obtain a hot and gas-laden system as specified.

Approximately 30 scf of nitrogen were injected into the system prior to test initiation. Several minor adjustments were made to the specified initialization steps and conditions.

The initial SG steam pressure was reduced from 1300 psia to N1200 psia, to reduce the initial loop temperatures; this slightly increases the time af ter the final (stagnating) gas injection at which the test is initiated

[ and at which the operator invokes the plant venting procedures.

The system was initialized at 1% of scaled full power, rather than N1/2% as

{ specified. This was done to offset the increased losses to ambient (due to a higher than usual initialization temperature), to ensure that the SG secondary remained at pressure throughout initialization, and to maintain a substantial primary flowrate with which to distribute the gases throughout the system. Just before test initiation, core power was increased an addi-tional 1% of scaled full power as specified; power during the test was then

( 2% of scaled full power (rather than 1% plus losses to ambient). This in-creased power increases the natural circulation flow rate (by the ratio of power levels raised to the one-third power); it also increased the primary-to-secondary temperature difference and thus raised the minimum temperature to which the primary fluid could be cooled. Af ter the cooldown was com-pleted, losses to ambient had decreased to roughly 0.13% of full power. At this time the available power (core less ambient losses) was %1.9% versus 41.4% specified, and the actual versus planned natural circulation flow rate was N10% higher.

Initial gas additions were made to install noncondensibles in the RV upper head, rather than tc first saturate the loop fluid with gas. This was done to ensure that the: U burden would be installed before the HL U-Bend voided and loop flow stalled, and was based on observations during initial injec-tions. The technique employed was successful in establishing the desired initial gas burdens, particularly in the RV Upper Head.

3-8

/O Primary pressure was maintained near 1700 psia during initialization, rather than increasing to 2000 psia as initialization progressed. As with the secondary pressure adjustment, this was done to expand the time and pressure band between the final injection and test initiation. The reduced primary pressure decreases the volume of gas which can be dissolved in the primary liquid. But the total amount injected (and subsequently recovered) was 30 scf (or approximately 3 loop volumes, cf. Figures 3-3a and b). Thus the slightly reduced initial primary pressure allowed a more orderly transi-tion from initialization to test initiation, and had no major impact on ini-tial conditions.

The final initialization step was to inject a relatively large amount of gas into the HL U-Bend, and to verify voiding and loop , flow stagnation.

This test-initiating evolution was performed as planned.

3.2.2. Conduct Test conduct was as specified. The procedures to restore SNC (subcooled natural circulation), veri fy SNC, and cooldown were invoked sequentially O

C/

and successfully. SNC was not lost af ter it was first re-established.

The operator used pressurizer spray (diverted HPI) extensively to reduce primary pressure; Pr heaters were used to a lesser extent to hold pressure.

The primary was cooled and depressurized well within the specified pres-sure-temperature band (cf. Figure 3-5). HPI was throttled such that ap-proximately unifonn cold leg and downcomer fluid temperatures were main-tained, cf. Figure 3-1f and appended plot 26. Operator comments during the test are given in Table 3-2.

3.2.3. Measurements Unavailable measurements are summarized in Table 3-3; none of these omis-sfons hindered test interpretation. Gas accounting is summarized in Figures 3-3a and b. The maximum apparent loop burden (Figure 3-3b) is obtained by assuming all the voided regions except that of the pressurizer contain only nitrogen, aad that the entire loop liquid inventory contains dissolved gas at the concentration indicated by the core-exit partial pres-sure. This maximum-volume estimate obtains s40 scf at test initiation and a residual burden of 45 scf.

3-9 L-

I The nitrogen is measured upon injection, and again as it evolves from the 7 venting (HPV) effluent. These measurements of input and output provide a

) second and w,are reliable indication of loop NCG burden, cf Figure 3-3a.

The burden at test initiation is s30 scf (Table 3-4); the total amount col-lected exceeds the amount injected by approximately 3 scf (and some noncon-densible gas certainly remains in the system at test termination). On the basis of the existing information, at least 30 scf of nitrogen were in the f

loop at the start of the test.

f 3.2.4. Sumary Test initialization, conduct, and measurements paralled the specifications.

Adjustments to the initialization procedure were made as required to con-duct the test, specifically to extend the brief period between the final initialization gas addition and test initiation. Test conduct was as speci-fied; once initiated, natural circulation was maintained using the speci-fled procedures. The specified pressure-temperature envelope was approxi-mately maintained Gas closure calculations (based on measurements of the amount of gas added and collected) indicate an uncertainty of roughly 10% of the maximum ini-tial total burden; this maximum loop NCG volume was approximately 30 scf or 3 loop volumes. Comparison of the amount of gas injected with that re-covered substantiates the ability of OTIS to contain gas.

t 3-10

f). 3.3. Observations G

Test observations are conveniently described according to the major test phases:

(1) Initialization, O to 310 minutes (DAS),

(2) Initiation, 312 rinutes, (3) Constant-Pressure Phase (to 381 minutes),

(4) Depressurization, 381 to 540 minutes, and (5) Stabilization Phase (beyond 540 minutes).

Subsequent sections address these 5 phases. Figures 3.1 through 3.6 are extracted from the larger plot file (appended) and augment the discussions of the loop interactions.

3.3.1. Initialization Phase, 0 to 310 Minutes The test is brought to its initial conditions over a 5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> period. The major activities during this time are multiple gas injections, a core power O

increase, and a larger gas injection just preceding the initiation of the test.

The DAS (Data Acquisition System) is activated at 1451 on 26 April 1984.

(This time of DAS activation establishes zero time for the several appended time-based plots). At this time the primary system is full, subcooled, and in natural circulation (Pr level is $13'). Core power is 1% of scaled full power (1% = 21.4 kW, losses to ambient are $1/2% power). Primary pressure is 1725 psia (Figure 3.la), loop fluid temperatures are 565F to 585F (Fig-ure 3.lb, saturation pressure at 585F is 1375 psia). Primary flowrate is 2.85% of full flow (1% = 0.265 lbm/s). The SG secondary pressure is 1200 psia (Tsat = 567F), secondary liquid level is s7'; secondary feed and steam flowrates are nearly zero. The primary loop fluid is largely gas free, primary boundary systems are inactive (no leaks, HPI, etc.).

At 1505, 14 minutes after DAS activation, the RVVV is manually closed in preparation for the gas additions. The incremental gas additions begin at 1517, 26 minutes after DAS activation. This first addition consists of N2 p scf (standard cubic feet) of nitrogen injected at the bottom of the RV.

O 3-11 L

)

Immediately upon injection the Pr (pressurizer) level increases, then sub-sides (Figure 3-ic). The Pr surgeline metal temperature increases from f 507F to 560F, reflecting the insurge of 565F hot leg fluid (appended plot 121). Loop flowrate perturbs by s1/2% at and after the injection. The second injection, N2 scf at 1525 (34 min. after DAS activation), is performed in the same manner as the first (the gas addition schedule is given in Table 3-4).

Most subsequent additions are done with the cold leg throttle valve (CLCV01) momentarily closed to reduce the transport of the injected gas out the hot leg nozzle, and thus to direct the NCG (noncondensible gas, nitro-gen) to the RV upper head. These brief periods of stalled flow (Figure f 3-lh) perturb system conditions generally (Figures 3-la-g). For example, primary flowrate momentarily decreases to zero, primary pressure briefly increases in response to the decreased heat removal rate, and the SG pri-mary fluid temperatures and SG secondary pressure similarly fluctuate.

The 5th gas addition at 71 min. (after DAS activation) begins to void the RV (reactor vessel) upper plenum (Figure 3-1c). The RV collapsed liquid level begins to decrease and the upper plenum void fraction begins to in-crease (Figure 3-1d); the core region and outlet plenum void fractions in-crease at each gas addition but subsequently subside. The Pr level begins to increase at an enhanced rate (Figure 3-1c). The cumulative gas volume in the loop is 9.43 scf (Table 3-4) which is approximately the amount needed to saturate the loop fluid at the current loop conditions.

Additions beyond the 5th gas injection correspondingly expand the RV upper plenum voided volume and continue to raise pressurizer level. Primary pres-sure increases with each add and is allowed to subside between injections.

Also, bubbles are repeatedly observed visually at the HL viewport (35' ele-vation) just after these RV gas additions.

At 155 min. the RV conductivity probe just above the elevation of the RVVV begins to indicate dry. This indication follows the 10th incremental gas addition, the cumulative NCG burden is now 18.1 scf (Table 3.4). 1he RV conductivity probe just below the elevation of the RVVV (+0.6'), RVCPO4 (appended plot 113), indicates decreased wetting at 185 min. These CP indications roughly correlate with the indicated RV collapsed liquid level (Figure 3.1c): +2. 2 ' a t 160 mi n. , +2 ' a t 180 mi n. , a nd +0. 6 ' a t 215 mi n .

h 3-12

During this period of RV voiding, the outlet plenum and upper plenum fluid temperatures fluctuate between 580F and 605F (nearly saturation, Figure 3-le). At 170 min. , the fluid upstream of the RVVV (RVTC09) begins to cool, reaching 555F by 195 mi n. (Figure 3-19); this temperature is lower than that of the RV-regicn liquid, which ranges from 560F to 570F (Figure 3-le). These indications confirm the presence of a gas other than steam in the voided RV volume, i.e., of the injected nitrogen.

After the 12th gas addition at 1755 (184 min. after DAS activation), void-ing is briefly observed visually at the HLUB (Hot Leg U-Bend). The cumula-tive NCG burden is now 20.5 scf (Table 3-4) or 2 loop volumes. At 215 minutes, the RV indicated level reaches the elevation of the RVVV (+0.6')

and remains relatively constant through the subsequent gas additions (14th through 16th, Figure 3-ic). Primary pressure is similarly more stable than before but these final small additions were made without interrupting loop flow.

After both the 14th and 15th gas additions at 232 min. and 255 min., brief p voiding is again visually observed at the HLUB. However the calculated HL b level indicates full throughout this period -- the short duration of the HLUB voiding apparently renders it undetectable.

The 16th incremental gas addition at 273 min. raises the loop burden to 23.3 scf (Table 3-4). The RV remains voided down to the elevation of the RVVV (Figure 3-Ic). In preparation for the test-initiating injection to the HLUB, core power is increased to 2% of full power beginning at 295 minutes, and control of the RVVV is returned to automatic on differential f pressure at 299 minutes; the valve remains closed. In response to this power increase, primary flow increases from 3% to 4% of full flow, and the

Pr (pressurizer) surgeline metal temperature increases with the insurge into the Pr. Loop fluid temperatures also change gradually with the power and flow adjustments. Core power approaches 2% of full power by 310 min-utes (appended plot 19) and the loop is ready for the initiating gas addition.

l At 312 minutes, 6-1/2 scf of nitrogen are injected into the HLUB, raising the total loop burden to approximately 30 scf or 3 loop volumes (Table l 3-4). This injection voids the HL by si' upstream of the HLUB and by 3' downstream of the HLUB (Figure 3-2b). The HLUB fluid temperature abruptly l

t 3-13 I. .

I decreases to 480F, then increases (Figure 3-2h). Primary loop flowrate i stalls in response to the voided HLUB (Figure 3-2c). The RVVV differential pressure increases, the valve opens and the temperature of the DC (downcom-er) fluid at the RVVV discharge increases from 532F to 580F (Figure 3-2j).

The CL (cold leg) flowrate begins to diverge from that of the DC (downcom-er) (Figure 3-2c). the decreasing loop fl ow impedes primary-to-secondary heat transfer, causing primary pressure to abruptly increase toward 1900 psia (Figure 3-2a). These indications of stalled ficw prompt test initia-E tion.

J 3.3.2. Initiation, 312 Minutes At test initiation, the loop burden of noncondensible gas has been raised to 30 scf with a final injection of 6-1/2 scf at the HLUB. Loop flow is stalled, core region fluid temperatures are increasing markedly, and pri-mary pressure reaches 1900 psia by 312.4 minutes (Figures 3-2a, c, and g).

' At this time the test is initiated and the operator begins to use the HLHPV (HL High Point Vent) and the steam generator to regain circulation and to cooldown the system.

As mentioned at the end of the description of loop initialization, condi-tions are changing rapidly as the test is initiated (Figures 3-2a-j). At l 312.8 minutes, the HLUB-downstream void fraction abmptly increases to 13%

and persists until 315 minutes. The conductivity probe downstream of the HLUB indicates dry. Simultaneou sly loop flow, which had briefly returned to 3% of full flow, subsides and remains nearly stagnant until 314 minutes I

(Figure 3-2c). The RVVV momentarily closes but by 313 minutes the actuat-ing DP has increased to 0.2 psi and the valve reopens at 313.2 minutes as

? confirmed by the RVVV downstream fluid temperature response shown on Figure 3-2j. The RVVV discharge progressively heats the downcomer fluid (Figure t 3-21). As the HL voided volume diminishes the RV voided region expands (Figure 3-2b); at 313.5 min. the RV upper plenum void fraction begins to in-crease from a minimum of 60% (Figure 3-2f).

At 313.6 minutes the HL High Point Vent (HPV) is opened. The initial gas venting rate over the first half hour is roughly 20 scf/hr (Figure 3-3a).

At 313.8 min. the AFW flowrate increases from 0 to 3% of full secondary flowrate (Figure 3-2d. 1% = 0.0265 lbm/sec). (Both the HPV and AFW 3-14

~

t indications are in response to specified operator actions.) Secondary Q steam pressure begins to decrease from 1200 psia (Figure 3-2a) and the SC in4 primary outlet temperatures begin to decrease. SG secondary level begins to increase (Figure 3-2b).

By 314 minutes liquid again reaches the HLUB spillover elevation (the HPV effluent metering system fi rst begins to indicate liquid in the vented stream at 314.6 minutes). Loop flowrate restarts (Figure 3-2c), sthe rela-tively hot DC fluid reaches the core (Figure 3-29) and the HL fluid tempera-tures increase (by 15F) sequentially with elevation as this wanner fluid passes (Figure 3-2h). AFW activation with stalled primary flow had de-creased the upper-elevation wetted-tube primary fluid temperatues roughly to secondary saturation temperature; now the resurgence of loop flow re-heats this fluid (the aforementioned warmer HL fluid reaches the SG at

'316.5 minutes).

By 314.3 minutes the HLUB-downstream conductivity probe indicates rewetted.

With the continuing discharge from the HPV and the reactivated primary-to-secondary heat transfer, primary pressure begins to decrease at 314.5 min- ,

utes (Figure 3-2a). With this pressure reduction the RV voided volume con- ,

tinues to expand , gradually (Figure 3-2f). At 314.7 minutes the RV conduc-tivity probe above the elevation of the RVVV indicates dry and the RVVV DP  ;

peaks at the actuation pressure. Subsequently the valve momentarily opens, the DC fluid beyond the valve briefly reheats (Figure 3-21 and j), and the DC flowrate peaks at 0% of full flow (Figure 3-2c). By 315 min. the indi-cated RV collapsed liouid level reaches the RVVY elevation (+0.6', Figure 3-2b), and at 315.2 min. the RVCP (conductivity probe) just below the eleva-tion of the RVVV indicates decreased wetting.

t Prienary loop flowrate reaches a maximum of 6-1/2% of full flow by 315.8 mi n. (Figure 3-2c). The operator transfers AFW control to automatic (con- #

stant level) as the secondary level approaches the specified control point (10', Figure 3-2b) and the AFW flowrate abruptly decreases (Figure 3-2d).

The primary flowrates in the wetted versas the unwetted SG tubes begin to ,

diverge. With the continued heat transfer and decreased AFW flow the SG secondary begins to repressurize (Figure 3-2a); the SG secondary fluid tem-l peratures increase from 575F to 585F.

l s .

t,

?

I

' 3-15

3.3.3. Constant-Pressure Phase (to 381 Minutes)

Five minutes after test initiation (which occurred at 312 minutes based on DAS time) the loop is virtually liquid full, primary flow and primary-to-secondary heat transfer have been reestablished (Figures 3-4a-e). The RV collapsed liquid level remains between the elevations of the HL nozzle and the RVVV (Figure 3-4c); based on the " depressed" temperatures (vapor tem-

)

J peratures which are less than the saturation temperature from total pres-sure) in the voided region of the RV (Figure 3-4e), this volume contains significant amounts of the injected noncondensible gas. At 317 minutes the operator reduces the SG steam pressure control point to 1050 psia (Figure 3-4a). Secondary steam and feed flow begin to increase (Figure 3-2d), as does primary loop flow rate (Figure 3-2c). Primary pressure begins to de-crease from 1790 psi at 318.2 minutes (Figure 3-4a). At this time the to-tal primary fluid energy begins to decrease; the pressurizer outsurges gradually as the loop fluid contracts (Figure 3-4c), and the total primary fluid volume decreases. The operator uses the main Pr (pressurizer) heat-ers to slow the rate of primary pressure decrease at 320 minutes. Primary pressure is maintained roughly constant until 381 minutes (Figure 3-4a).

At 330 minutes, the operator actuates throttled HPI with the Pr level ap-proaching 20' (Figure 3-4d),' the HPI flowrate is subsequently throttled, at

. 4335 min. Total primary fluid mass begins to increase, primary pressure in-creases from s1600 psia; Pr level begins to increase (Figure 3-4c); the RV level begins to increase from 1/2', the RV upper plenum void fraction be-gins to decrease from 95%. The introduction of cold HPI fluid abruptly de-creases the CL exit fluid temperature to s520F.

The operator initiates a series of stepwise reductions of secondary control

]- pressure beginning at 338 minutes. Secondary pressure responds accordingly

> (Figure 3-4a), SG steam and feed flow increase briefly with each pressure reduction, and the primary loop fluid temperatures begin to track the de-creasing secondary saturation pressure (Figure 3-4b).

3.3.4. Depressurization Phase, 381 to 540 Minutes The operator has cooled the primary at roughly constant pressure for approx-imately 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, from test initiation at 312 minutes until 381 minutes. Pri-mary conditions Ibased on total pressure and hot leg fluid temperature) 1 ,

3-16

f')

have been altered from 20F subcooled to 80F subcooled at 1750 psia (Figure 3-5). The operator now initiates primary depressurization to conform to the specified p-T envelope.

It should be noted that the indicated primary fluid subcooling (based on total primary pressure and HL or core outlet fluid temperature) is greater than the actual subcooling. The individual total primary pressure consists of the partial pressure of water vapor and the partial pressure of nitro-gen. At least during the initial venting phase, and perhaps sporadically throughout the couldown, the correspondence between the trends of apparent saturation temperature and core outlet fluid temperature indicate that the core outlet fluid was saturated, cf. Figure 3-5.

At 381 minutes a small amount of HPI is briefly diverted to provide pressur-izer spray. Primary pressure begins to decrease, Pr level increases, and the RV voided volume expands (the RV liquid level decreases l' from the RVVV elevation, Figure 3-4c). Primary flow rate decreases toward 3% of full flow and then increases, apparently in response to the momentary diver-sion of loop fluid to the pressurizer. This depressurization moves loop

{J-)

k conditions from 80F subcooled at 1750 psia to s60F subcooled at 1525 psia (Figure 3-5). Primary pressure is stabilized at 1525 psia at 388 minutes using the Pr main heaters (Figure 3-4a). The primary is held at this pres-sure until the continuing cooldown increases the subcooling margin to rough-ly 70F.

This combination of depressurization followed by cooldown at constant pres-sure is used repeatedly to traverse the p-T envelope (Figure 3-5). Pressur-izer spray is used to depressurize, the Pr main heaters are used to main-tain pressure only for the fi rst few cooldown periods. As the sequence progresses, visual indications of gas evolution are more commonly encoun-tered; bubbles are seen at the HL viewport (35'); brief and partial-voiding is sometimes seen at the HLUB viewport. These sightings occur shortly after a primary depressurization. The metered gas discharge rate from the HPV also increases as the depressurization -- cooldown sequence progresses.

This collection rate increases to s15 scf/ hour at 475 minutes (s163 minutes after test initiation) (Figure 3-3a); at this time the primary pressure is j s600 psia and the rate of primary cooldown approaches 100F/hr.

v 3-17

The sequence of depressurizations and cooldowns progresses smoothly. At 442 minutes the operator transfers secondary depressurization to the auto-t matic controller, set to obtain a 100F/ hour secondary cool down. At 455 7

minutes, during the depressurization from 1000 to 840 psia, the downcomer level decreases 1/2' from full and continues to evidence slight voiding for the next 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> (Figure 3-6c). The DC level did not decrease enough to afford a measurement of its temperature, but based on the highly subcooled temperature measured downstream of the RVVV (Figure 3-6d), the DC void is apparently nitrogen gas.

3.3.5. Stabilization Phase (Beyond 540 Minutes)

The SG secondary approaches its minimum pressure (approximately 30 psia) at 540 minutes, 228 minutes after test initiation (Figure 3-la). The primary

[ cooldown rate begins to diminish correspondingly (Figure 3-lb). The DC level indicates full, and the RV level slowly increases toward the eleva-

~

tion of the RVVV (Figure 3-ic). At 590 minutes, the RV conductivity probe above the HL nozzle rewets.

Primary pressure and temperature are maintained within or just below the specified band as the cooldown diminishes (Figure 3-5). The cooldcwn is

' completed at 600 minutes, 388 minutes after test initiation. Pressure and

- HL fluid temperature are 180 psia and 380F. The average cooldown rate was roughly IF per minute (Figure 3-lb).

At 690 minutes the HPI flow rate is increased to raise the Pr level. The r test is completed at 700 minutes. The final burden of noncondensibles is less than 5 scf (Figures 3-3a and b), roughly 30 scf have been discharged from the loop and recovered.

3.4. Conclusion l

OTIS Test 240100 exercises the HLHPV with a burden of NCG in the primary l' system. Plant procedures modified to apply to OTIS are used. The OTIS HLHPV size is intemediate to the ideal scaled area to simulate the SMUD

~

and FPC HL HIgh Point Vents.

The test is initialized in the manner specified. After 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> of injec-tions, 46 scf of nitrogen are added to the HL U Bend, bringing the total O

l, 3-18 e

i

gas burden to s30 scf. HLUB voiding and primary flow interruption are veri-fied and the test is initiated. The operator employs the adapted plant pro-cedures to restore natural circulation and to cooldown the primary. The l specified p-T envelope is approximately adhered to while maintaining an average cooldown rate of 60F/ hour. Measurements are sufficient to explore major loop interactions, gas closure is obtained to within approximately 10% of the injected volume. This test meets its objective.

l O

f 3-19 L _

h) u Table 3-1. Initial Conditions The adjustments of the specified intial conditions are addressed in section 3.2.2 and are appropriate to the test.

Specified Actual SG Secondary Pressure (psia) 1300 1200 SG Secondary Liquid Level (f t) 5 5 High-Elevation AFW Injection yes yes Primary System Pressure (psia) 1700 to 1700 2000 Core Pcwer (% of full power,1% = 21.4 kW) 1-1/2 2 Pressurizer liquid level (f t) 5 13 RVVV in automatic control, setpoints yes yes 0.25/0.125 psi (note the pressure difference)

5. Nitrogen injected to displace the RV Upper Head Liquid, to apparently satu-rate the loop liquid with NCG at 2000 psia, and finally to void the HLUB.

(

i l~

n I 3-20 I

• • - , . - . - - - . . . . . . - - . - - . . , ~ . . . . - - , . ..n--,,....--,.-,....,.-..-.--...-..- . , - . , , . . . . . . . - - - . . , - - . . , . - - . - . - . .

1 l

Table 3-2. Operator Comments TIME COMMENT 14:51 START DATA SAVE FOR RUN 240100 15:05 CLOSED RVVV MANUAL FROM AUTO CLOSED 15:16:45 FIRST CAS ADDITION MADE 1.98 SCF ADDED AT RV 15:24:55 SECOND CAS ADDITION MADE 2.23 SCF ADDED AT RV 15:35:20 THIRD CAS ADDITION MADE 2.01 SCF ADDED AT RV WITH STALLED FLOW (CLOSED CLCVO1) 15:37 OPENED CLCVOi, FLOW STARTED 1 15:46 CLCVOi CLOSED TO STALL FLOW

-[ 15:47:20 FOURTH GAS ADDITION MADE 2.27 SCF ADDED AT RV ,

OPENING CLCVO1 FLOW STARTED 15:49 I 16:01 CLOSED CLCVO1 TO STALL FLOW 16:01:55 FIFTH CAS ADDITION MADE 2.02 SCF ADDED AT RV 16:03 OPENING CLCVO1 TO START FLOW i 16:13 CLOSING CLCVO1 TO STALL FLOW l 16:13:46 SIXTH GAS ADDITION MADE 2.04 SCF ADDED AT RV j 16:14 OPENING CLCVO1 TO START FLOW 16:24 CLOSING CLCVO1 TO STALL FLOW 16:24:46 SEVENTH CAS ADDITION MADE 2.01 SCF ADDED AT RV 16:26 OPENED CLCVO1 TO START FLOW

]l 16:37 CLOSING CLCVO1 TO STALL FLOW y

16:38:20 EIGHTH GAS ADDITION MADE 2.07 SCF ADDED AT RV 16:39 DPENING CLCVO1 TO START FLOW 16 59 CLOSING CLCVO! TO STALL FLOW

~

17:00:25 NINTH GAS ADDITION MADE 2.30 SCF ADDED AT RV 17:02 OPENING CLCVO1 TO START FLOW 17:14:30 CLOSING CLCVO1 TO STALL FLOW I 17:14:50 TENTH GAS ADDITION MADE 2.28 SCF ADDED AT RV F. 17:16 CLCVO1 OPENED TO START FLOW 17:23 CLCVO1 OPEN~0 ALL THE WAY ( 100 % )

17:31:05 ELEVENTH GAS ADDITION MADE 2.17 SCF ADDED AT RV 17:54:42 TWELEVTH GAS ADDITION MADE 1.09 SCF ADDED AT RV 18:25 CLCVO1 CLOSED, ADDITION 13 OF 1.08 SCF AT RV 18:27 OPENING CLCVO1 TO REGAIN FLOW l 18:42:40 FOURTEENTH GAS ADDITION MADE 1. 02 SCF ADDED AT RV 7 19:06:25 FIFTEENTH CAS ADDITION MADE 1.08 SCF ADDEL AT RV

' SIXTEENTH GAS ADDITION MADE 1.41 SCF ADDED AT RV 19:23:46 I 19:46 STARTING TO INCREASE CORE POWER TO 42. 6 PJ n 19:50 RVVV TO AUTO, VALVE CLOSED 19: 54 CONTINUE TO INCREASE CORE POWER 19:58 DCDPO1 OUT OF SERVICE 20:05 ADDED ABOUT 10 SCF HLUB , OPENED CLCVO! , VERIFIED STALLED FLOW J HPV OPEN AFW ON '

l 20:07 SFCVO3 TO AUTO AS SG LEVEL REACHES 10 FT l 20:08 REDUCING STM PRESSURE TO 1050 PSIA 20:11 PRESSURIZER MAIN HTRS ON 20:18 SWITCHED FROM NORTH TANK TO SOUTH ACCUMULATING j

TM4(MANUALLY THROTTLED HPI INJECTION j 3-21

i Table 3-2. Operator Comments (Cont'd) 20:22 RVVV CYCLED ( CLOSED AT THIS TIME )

20: 23 CLDPO2 AND DCDPO1 DUT OF SERVICE 20: 30 LOWERED SEC STEAM PRESSURE 20 PSI 20:32 DCDPO1 AND CLDPO2 BACK IN SERVICE 20:33 DCDPO1 DUT DF SERVICE LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 20:34 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 20: 39 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 20:40 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI

{ 20:43 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI f- 20:48 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 20:*51 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 20:56 LDWERED SEC STEAM PRESSURE ABOUT 20 PSI 20: 58 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21:03 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI E1:20 LOWERED SEC STEAM PRESSURE ABOUT 2'O PSI 21:22 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21:25 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21:27 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21: 28 PRESSURIZER SPRAY ON i 21:34 PRESSURIZER SPRAY OFF LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21:37 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21:38 LDWERED SEC STEAM PRESSURE ABOUT 20 PSI r -O 21:42 DCDPO1 BACK IN SERVICE

[ 21: 43 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21: 44 DCDPO1 OUT OF SERVICE

21

47 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI l 21:48 PRESSURIZER SPRAY ON 21: 51 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21: 54 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21: 55 SPRAY OFF 21:57 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 21: 59 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI j 22:00 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI PRESSURIZER SPRAY ON 22:02 22:04 LDHERED SEC STEAM PRESSURE ABOUT 20 PSI 22:07 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI l 22:00 SPRAY OFF 22:09 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 22:10 LOWERED SEC STEAM PRESSURE ABOUT 20 PSI 22:13 LOWERING SEC STEAM PRESSURE VIA RAMP CONTROL ABOUT 100 DEG/HR COOL DOWN j- 22:22 PRESSURIZER SPRAY 22:29 PRESEURIZER SPRAY OFF 22:30 SWITCH FROM S3UTH TO NORTH ACCUMULATING TANKS lo 3-22

Table 3-2. Operator Coments (Cont'd) 22:31 PRESSURIZER SPRAY IS ON 22:36 SPRAY OFF 22:37 PRESSURIZER HAIN HTRS OFF 22:40 PRESSURIZER SPRAY ON 22:43 THROTTLING BACK ON HPI 22:45 SPRAY OFF 22:46 SWITCHING TO NORTH TANK 22:50 OPENED HIGH STEAM HAND VALVE SET PSDPO3/04 AND PSORO3/04 TO READ 22:53 PRESSURIZER SPRAY IS ON ~

23:01 PRESSURIZER SPRAY OFF 23:09 PRESSURIZER SPRAY ON 23:13 PRESSURIZER SPRAY OFF 23:16 OPENED SOUTH TANK PRESSURIZER SPRAY ON 23:20 DRAINING NORTH TANK %d 23:25 CLOSED NORTH TANK DR6/ VALVE 23:26 PRESSURIZER SPRAY ON

{ 23:34 PRESSURIZER SPRAY OFF 23:42 PRESSORIZER SPRAY'ON 23:54 PRESSURIZER SPRAY OFF 00:00 NORTH TANK FILL OPEN '

00:01 SOUTH TANK FILL CLOSED 00:08 DRAINING SOUTH TANK f 01:45 CONTINUING TO THROTTLE HPI AT A VERY LOW FLOW L RATE WHICH DOES NOT INDICATE ON OTIS DISPLAY O2:21 INCREASED HPI TO RAISE PRESSURIZER LEVEL W O2:45 HPV CLOSED i

STOPPED HPI RV CORE TEMP APPEARS TO HAVE BEEN STALLED AT 300 J

DEG STOP DATA SAVE HPV LEAK WT = 297 LBM ELLIOT TANK USAGE = 57 GAL

+

P 4

1 (Il J

3-23 4

'l O /^T j O V Table 3-3. Unavailable Measurements SUMMAPY OF VAPIABLES DISCAFDED ON INPUT, TEST 240100 -

f ND. VIAB SYSILM INST. ElfVA110h 0E 5C R 1PT I ON 1 155H L T C 06 2HL 2fTC 50.00 HOT LEG FLUID TEMP (F)

! 2 262HLCP05 2bl 16 C P 41.00 HOT REG CONDCTVTY (WET /ORY)

! 3 263HLCP06 2hl it CP 45.00 HOT LEG CONDCTVTY (WET / DRY) l 4 264HICPC7 2HL 16 C P 49.00 HOT LEG CONOCTVTY (kET/DRV) 5 265HLCP08 2HL 16 CP $3.00 HOT LEG CONDCTVTY (WET / DRY) 6 266HLCPC9 2HL 16 CP $7.00 HDT LEG CONDCTVTY (WET / DRY) 7 274HLCP17 2bl 23RCP .50 HOT LEG REF. C.F.

8 272HLCP15 35GP 16 CP 56.90 SG PRIMRY. CONDCTVTY (WET /ORV) 9 26S P TC 19 35GP 21STC 23.10 SG PRIhRY. STRING TC (F) 10 275PTC20 35GP 21STC 30.10 SG PRIMRY. STRING TC (F) 11 2d5FIC21 35GP 21STC 35.10 SG PRIMRY. STRING TC (F) i Y 12 295PTC22 35GP 21STC 39.10 56 PRIMRY. STRING TC (F)

N

• 13 30SPTC23 35GP 21STC 43.10 SG PRIMxY. STRING TC (F) i 14 31S P TC 24 35CP 2151C 47.10 SG PRIMRY. STRING TC (F) 15 32SiiC25 356P 21STC 49.10 SG PHIMPY. STRING.TC (F) 16 335 P TC26 35GP 21STC 50.10 SG PRIMRY. STRING TC (F)

17 355PTC28 356P 21STC 51.10 S G PklMR Y. STRING TC (F) f 18 1.03PFDT03 6PR 10 D T 42.80 PRESURIZR. INSUL. DT (F)

! 19 53551C13 22565 2FTC 32.30 SG SECbHD. FLUID TEMP (F) i 20 795FICO2 22565 25MTC 26.30 SG SECOND. METAL TC (F) 1 21 76SPTC06 22SGS 25PTC 44.20 SG SECOND. METAL TC (F)

22 20051CF20 22565 32KCP 0.00 SG SECGND. UP.hti.CP (REF. FT) 1 23 3 44VliCO3 34CLD 2FTC -999.00 CLD LEAK FLUID TEMP (F) 7 i

l i

4

l l

Table 3-4. Gas Additions as Volume (sc O Addition Clock DAS time number time (min) Added Cumulative 0

1 1517 26 1.82 1.82

) 2 1525 34 2.03 3.85 3 1535 44 1.80 5.65 4 1547 56 1.95 7.60 5 1602 71 1.83 9.43 6 1614 83 1.79 11.2 7 1625 94 1.72 12.9 8 1638 107 1.76 14.7 9 1700 129 1.68 16.4 10 1715 144 1.70 18.1 11 1731 160 1.63 19.7 12 1755 184 0.83 20.5 13 1825 214 0.74 21.3 14 1843 232 0.89 22.2 15 1906 255 0.84 23.0

- 16 1924 273 0.31 23.3 17 c.!005 <314 6.44 29.8 r

1 a

/

3 2e

)

i .

^

(} Figure 3-la. Primary and Secondary Pressures V

PRELIMINARY DATA 240100. O SMUD/FPC GAS TEST pto- 3 2000 3F- 38 F/0 INDEX VTAS Ha/Nell'*ASN- 'e , / + RV KPR RVPR20 ldpOM4 ZSTMKPR pspe20 1750..;

'sMdiukos 1500 ini}iaNok ,c k 000eshnh-msort. -

' pkst- .g; ,

'M 1:50 l 2

$m '

i ol:

a. -

~

rm.

g ic00 k h.

O A

W w 3

% . s C -

750 _  !

I l i

500 .

l l I  !

l l 250 _ j r I _ _

s i

1

~

3 i l , i i l 0 200 400 600 200 1000 1200 OTIS TIME (MIN.) 0=1450 55 26-APR-84 C'

N)\

3-26 l

L ..

Figure 3-lb. Average Fluid Temperatures PRELIMINARY DATA 240100. O SMUD/FPC GAS TEST oto- 2 1000 r INDEX VTAB l +PRISAT cAtco ZRV AVT cALCo XHL AVT cAtco 900._ 0SGPAVT'cAtco

+CL AVT cAcco.

XDC AVT catco ZPR AVT cALco Y SG S AVT cAcco b 200 U 57ivi3 A T cALCD D

% 700.

CL

" 2 w

>=

0 3 (00

• iQ S

a 6eK?^

w; ; d l

- O W \

k '

SCO. -

u L

W 2

r D 400 o

'W 300.

2oo , , ,

200 400 600 800 1000 1200 O.

>~ OTIS TIME (MIN.) 0=1450.55, 26-APR-84 0

3-27

j.-

, 4 Figure 3-Ic. Collapsed Liquid Levels 240100. O SMUD/FPC GAS TEST ,to. 4 70 U.,

E --

INDEx VTAB e -

c._ y =

, , +RV KLV RVLV2D XHL KLV HLLv20 X SG PK L V sPLv20 so.o_ 0SGPKLV'HLLV21

+CL KLV cLLv23 XDC KLV cLLv21 v

x x ,

ZPR KLV P'ti v 2 0 I Y SG SK L V ss v23 so.o u.

o m

I o

40.o.

u

. u3 1-

• u.

30 o IN -

m, i V

\

L.: 1.

8 O 20 O_

m Q.

a a

o U~

i 0. 0 4

W m m .

. y y y '

o. o_ "-

-ic o , , i g, 20 403 60; Sco ;o:0 120; OTIS TIME (MIN.; 0=1450 55. 26-APR-84 l

l lp PRELIMINARY DATA O

3-28 l

r l

._ , - . . , . . . _ . . . , _ . . . . - . . - . . _ ~ . . . - . . . _ _ _ . . - . . , - . . - , . _ _ , . - . . . . . . . . - _ , . - - . - . - - . - . - - . . . _ . ,

Figure 3-1d. Approximate Reactor Vessel Void Fractions 240100.0 SMUD/FPC GAS TEST PLOT 25

[

140 0

[

INDEX VIAS

• CORE catco ZOUTLET cauco XUPPER cacco i20.0_ oOVERAL'cacco m

/ v 100.0 5 x

>  ; J 0  :(

E 6 80.0 O

2 O 60.0 s

$ )

G

- U E

O

- 0 40.0 W

1  :

'2 m >

X 20.0

@ r m

CL

0. 0, A - -

^

. , =' ;

m_ .

5

'C_

-20 0- 6 3 3 3 6

O. 200 400 c00 800 *000 1200 OTIS TIME (MIN ) 0=1450.55. 26-ADP-84 l

PRELIMINARY DATA g 'l 3-29 1

/' Figure 3-le. Reactor Vessel Fluid Temperatures V) 240100 0 SMUD/FPC GAS TEST n oT3,3 1000 ,

INDEX VTAB Y -23 7 PVTC01 E -19 1 RVTCO2 X -8 3 RVTC07 900 - D 6 d'RVTCO2 6 RVTC09 800

^ 700 _ t L. i v i 1

2 -

L.:

w 60'~  !

O

\j O

. ~- -- s 1

% [* '

_ %)*p

' A 1 l

L.: 500 _l X

s \ W ,

> \ ' -

l l '

w  !

O 's 1 J \

T 400 I \

I 1 -

3:0 . i 1

i E I' S  ; i 6 i i

;;3 4; e

: 20: .... ---

OTIS TIME i, v I N ) J=1453 55 ZE-A -54 l ih PRELIMINARY CAIA 3-30 L

Figure 3-1f. Downcomer Fluid Temperatures 240100. O SMUD/FPC GAS TEST peorisi INDEX VTAB

• -10 0 ocT:c2 X -3 zccT::

X -. 5,ccTcos 900 D 1 d C6TC04

+ -20 O ocetoi X qReicio 800 I

- 7eo _ t L

v

a. 1 2 l w  :

oo l c

3.

_ ~

C e - -- =

}k g

i u

s sea _ .

C U

z N S i c

o ,

4:s N.

I 300.

l --

t 233 , , , . .

, .: 4:: e:: a:: .:::  :::

OTI5 TIVE (MIN.} 0=1450 55 26-A *-B4 PRELIMINA:!Y DATA $

3-31

eI :

f 1-j,,-

Figure 3-1g. RVVV Fluid Temperatures

. 240100.. b SMUD/FPC GAS TEST PLOT 171 1000 ,

INDEX VTAB i 6 RVTC09 X 6 avreio 900 _

i ,

.l.

800.  ;

- ^ 700._ . >

- L

. - I 2- .

. w-

[N:t . H- p i  !

I 600' i , I

.e- i <

o.  :- -'

1

' .x M\

t

\ l ,

o 500 _

\, 4  !

\,

e

\. , i i 6- ,  ;

\ I

. 400

• }

g  :

} -

i

, i

[. 300 _  !.

1:

i .

• • e l

i i n f- .'

'f f l 20:  :

, e . . . e <

i- 0 2:: 4:: e:: a:: .::: .;:- t

OTIS TIME (MIN ; J=;450 55 1. 6 - A

3.-54 i

PREtIM: NARY DATA t 2

E l'

i i

3-32 r hy.gg i yyg, m g re-e- T' ww*-'"**~'+M-"="r*De**arw- rw-+v-*-***wm***"*'N**ewevevwNem=rwee-eew-**-Nw'*-,- '

Figure 3-2a. Primary and Secondary Pressures 240100. O SMUD/FPC GAS TEST ptg7 3 2600.

INDEX VTAB

+RV KPR RVPR20 ESTMKPR PSPR20 2400.

~

i 2200.

t d /

2000. 4,~)

%)

d i g yv-I t.aJ 1800- .J b

V)

~

Y CL 1600.

W r 1400.

u 4 ,

. 1,s v (. .'

1200  ; I g C

q\ '

I

_- 1000 , , , -

300 00 . 305.00 310.00 315.03 320 00 325.00 330 00 OTIS TIME (MIN.) 0=1450.55, 26-APR-84 PRELIMINARY DATA $

3-33

/_ '

Figure 3-2b. Collapsed Liquid Tends

( /

'J 240100.0 SMUD/FPC GAS TEST PLOT 4 70 0 5-  ;

'=

, y

-T NT X VTAB RvLv20 In 1;I,J $di .

p. j XHL KLV HLLv20 X SG PK L V sPLv20 80 0- 0SGPKLV'HLLv21

+CL KLV CLLv20 XDC KLV cLLv2s x Y ^x C x 2PCxKLV PRLV20

,, s.,f Y SG SK LV ssLv20 w

a m

J O

40 O_

J , 1.5 W

e ,

w 6

v 30 0 '

,ey , ,

m .s (V i J w

W J

20 O_

m O.

<C J

J 10 0 j

u

"'- - - - - ' --~--

O. O_ 7 '

._ , . . _ 3c. __. N

'~

39

-10 0 , , ,

300 00 305 00 310 00 315 00 320 00 325 00 3:0 00 OTIS TIME (MIN.) 0=1450 55. 26-APR-84 73 V PRELIMINARY DATA 3-34 L

Figure 3-2c. Primary Flowrates ,

240100. O SMUD/FPC GAS TEST ptor 9

'o. INDEX VTAB 9' 5 +CL ORF cuoR20 4 ZDC ORF ocoR20 3-zdN:

5 gli

~

, A. -

00 l;

]%F

/

3 11 2 y:.f gh.3 00 -

0 0.

00 ,

~,.s I

!J0.

?> '! ?

f i i i

315 00 320 03 325 00 330 03 300 00 , 305.03 310 00 OTIS TIME (MIN.) 0=1450.55. 26-APR-84 PRELIMINARY DATA g 3-35

_ _ _ _ _ _ _ _ _ _ _ _ _ _ __ - - . . . - - - - - - - - - - . - - - - - -A

r' Figure 3-2d. Secondary Flowrates O;

i 240100. O SMUD/FPC GAS TEST PwT 12 INDEX VTAB

+ FEED sroR2o X STEAN PSOR20 X F D -ST N cALCD.

S 00-0 DM/DT'catco

~

n

• L 3: 2.50 d

• m

=j _ _ _ - _

i j,

.g f+

s L o.00_ =- . "7 Ww _- A Sm

'1 '

L eaf: %

o 'N

_ i

[ -2.50 s  ;

i S

-5 00_

s

, 5 y-750 l

-10 00.

-'2 30

) , ,  ; ,

300 CO 305 00 310 00 315 00 320 00 325 00 330 00 l

OTIS TIME (MIN.) 0=1450 55. 26-APR-84

'O PRELIMINARY DATA 3-36

~ _ _ . _ . - _ - - - _ - - . - _ _ _ _.__.

l Figure 3-2e. Cold Leg Fluid Temperatures 240100. O SMUD/FPC GAS TEST PLOT 26 INDEX VTAB

+ SG PF TC cL7cci ECL FTC cLic02 575.c0_ ;d XCL FTC cLic03 ODC FTC'cLic05 f +DC FTC cLic04 gr.%

570.00 -

M 4 d.1

$65.00 3 l u

?

< 2 560 00 3 4,,; y .

s,n r W, 555.00.

L O

U k\,

J %4 1 350 00 m .. - - a BM 545 00_

i 540 00 300 00 . 305 00 30 00 315 03 320 3C 325.00 330 00 OTIS TIME (MIN ) 0=1450 55. 26-APR-84 PRELIMINARY DATA h

3-37

r'm. Figure 3-2f. Approximate RV Void Fractions t,

v )

240100.0 SMUD/FPC GAS TEST PLOT 28 i.o o INDEX VTAB

+ CORE catco ZOUTLET catco 120 O_ XUPPER catco 00VERAL'cAtco n

v 100 0 Z

O L 80.O.

O

~ A* g ri.3 O I

> =

40 0 j) h, ill.;

NY Y w

O o 40 0.

U . a 2 . .

m v - _.

X 23 0 C.

C.

34 l'I

~

~ - 2  ;

- r

-20 0 6 6 e i 300 00 305 00 310 00 315 00 320 00 325 00 330 00 OTIS TIME (MIN.) 0=1450 55. 26-APR-84 f) n PRELIMINARY DATA i 3-38 i

i L ..

I Figure 3-2g. RV Fluid Temperatures ,

PRELIMINARY DATA

( .

240100. O SMUD'/* F'PC G AS T E ST 620 0 * .

~~

- vV \ INDEX VTAB

- \

.- ~ ~ * 'g + -23 7 RVTC01 E -19 1 av7002

\ ~ ' "#

610.0 O I N 68'avic0s

( N,j 6 avTcos tid 'S )

y t.,.

600 0 1

~

\

w

^ 590 0

)/ )

1.

e h TW.i

~

~

a. }

e O 1

5

/ \(.O- y

[ F 3 j f., -

l

)

570 0 j~ [

x N' - $r q_' xyn ,

Q' AY r O w 560 0

[

550 0 Of r

4 6 6

' 4 6 300 00 . 705 00 310 00 315 30 320 00 325 00 330 00 h

7 OTIS TIME (M:N.) 0=1450 55. 26-APR-84 r

3-39 L

(~') Figure 3-2h. Hot Leg Fluid Temperatures Q)

PRELIMINARY DATA 240100. O SMUD/FPC GAS TEST PLOT 121 800.O INDEX VTAB

+ 8 1 HLTc01 Z 9 I HLTCO2 X 20 0 HLic03 750 0_ 0 30 0'HLic04

+ 40.O HLicos X 60 0 HLic07 Z 67 4 HLicos Y 00 MLRiot 700 0

^ 650 0.

6 v

\

g

\

3

~

,W 600 0 K,

a _.

__<>,,,- .' ~-

~

8. .

L 3 m'. I e ss: o_

w a

>=

o 500 O f ;i 2,5 in.f 450 0 400 0 , , , i 333 33 305 c: sic 0:  ::: Os 320 00 325 c:  ::: c:

L) OTIS TIME (MIN.) 0=1450 55 26-ADR-84 3-40 i .

i L

1 Figure 3-21. Downcomer Fluid Temperatures PRELIMINARY DATA 240100.0 SMUD/FPC GAS TEST 610.O INDEX VTAB

+ -10.C Ocico:

E -3 2 ccTcci X .5 c.Tcos 0 1. E'cLTcca

+ -20 0 OCRT0i 2jl.3 X 6 avTcio

<P .

+ $90 0 i

(

,l, I

i 3

{ 580 v

O_,

{

l

~

N ..

O 570 0 --J1

~ -- wh fu t, y' p  % ,

="P ^ 'y 4 R g w_- St 1:, \

\

f ,b  ?

/ '2 560 O_, -

[ O < '

t z \.

g o  %

Y Q

550 0 m * -

Kncs _5 K _z zy a =

7 540.0..

5:: e f&%^ 2: J' soo :o - ses a: sto oc  :: ::  :: :: s:: ::

OTIS TIME (M!N.) 0=1450 55. 26-AoR-54 J

3-41

J Figure 3.2j. RVVV Fluid Temperatures PRELIMINARY DATA 240100. O SMUD/FPC GAS TEST .

. PLOT 171 sooLo INDEX VTA8

+ 6 avices X 6 mvicio 67o o 6so o

{ 63o. o v

l ~V $

LJ "

• 2;:

c 613 o .

o d Nk pu i

sea o_

l

- n 57o o ( iA.

r

\s sso.o_

l i

! sao o i

1. Dci - i .

l 33: 0: Jos 0: 3:e co sis ao 3 o o: athoc 33: 3-OTIS TIME (MIN.) 0=14L0 55. 26-APR-84 3-42 I t

-- , - w, . a w .

~ - - -

50 _ Tcst ini tiction - ' App:rcnt* NCG volumes cssume cil void;d v:Ium ;d c:ntain NCG.

" Cal.culated" involves correction of venting rates for transducer noise.

40 - F j c.

, I , Apparent f rom void-volume o I '

- & dissolved a 30 eg ',,,

af k \ '

.- s Apparent f rom voids only w $ 1 \

's i

w

• o A \

s

\ ' Calculated from o

y 20 - 4

.s 's inj ected-ven ted

.s ,

o. ..s '

s 8a  % s s

s \

N

\ s 10 -

N .s' -

\ '

, 's-  %

\

N '

s O

3% I i l l I I I

" 350 400 4C0 500 550 600 _' 650 Time Af ter DAS Activation, r.l i n ,

/ -

w 4

/.

s._

~ .

Time Af ter DAS Activation, min .

/_-

s < - _ > . i ,

j w e e h

. l 0 . , + * . / .'

I , M' en-

T-

,o

\ .

L

~ ,v )

5. ,

9 ,

e f

-i,' j- j -

s p g)t

'3C Figure 3-4a. Primary and Secondary Pressures

( s 't'!

PR E L IhM N A R Y DATA 3 . yj s .,

i 240Td0.O SMpb/fPC' GAS TEST .

,: , - 4

?(

'/

4  ? PLOT 1 2000 '

gi) t 't .);;- I INDEX VTAB s

• g

+RV KPR RvPR20 4 XSTMKPR psPR20 BI q3 k! 1750 ~ /

6 .g  : SI J

^'4 / -

e

.,I '

'- { l

,.; -s  ;' '

-\\  ;: s ( $30 ,318 1 ",0 0. '

. .-~/<l s uu

)?r ' \'e % i s . .

f 1 T

g s )"1 .

in g. _ .

n <

- - gp .

l  ;)

vi(% ; y .3%.

( C- M

\f , <! 8

, 1. - m s .

f, t

l

-i "

'- i t: 100C '

}m 3, ,

uh , 's  : ,

h *

._e- /

.r g5 ~$ '

. c% s .

., ' ) k-7 5 0 q '

-f lg '

d j Q, x s

{ E m i

,)-

' , , *g , .} \ . g

')

f. 'j l P y .'y ,

l 5*C- L .

-L g

p. g J

~} ,

I

' a

-g f* k 'N s

4, 250 _ -

s .

,< a -\ s.

3 [' ,

T ' !. .I

) '

( ('

, Na .s , l r.

, .. A g . I

! ) e . ., i i i l ,

303 2 ,

32Y ! 340,0 -- $ 6 0 3II 400 0 420 )

k- l '# C=1450 55. 26-AP -E4 0 T I S T I ME ,. ('M I N . J .

e

,p' Y g

O f #

g 4 g

- \,  % ,_

m t

• P I

,-}e . - j i t- g .

' I

,  %, , 1 s

-* \

.-. - - . . . .-. L.J. L:. - .- _-.:

Figure 3-4b. Average Fluid Temperatures PRELIMINARY DATA 240100. O SMUD/FPC GAS TEST PLOT 2 a ~

INDEX VTAB

+PRISAT catc0 ERV AVT cAtco XHL AVT cAtco 750 0_ OSGPAVT'cAtc0-

+CL AVT cAtco.

XDC AVT catco ZPR AVT catco Y SG S AVT cat;o b 700 0 57m3AI CALCO.

U T

D w

E 650 O_

• I w i i

1 I

a

O 600 0

.m. -

_- = -

\- -

I U ^

t W, D 550.c_

s  % -

6 w  %

w 59 \ NN 3:  ! .

s 3 500 0

\_ ,-

450 O_

fI I

i 400 0 i 6 . I 300 0 3 0 ! 2'O ' "

OTIS TIME (MIN ) 0=1450 55 26-APR-E4 3-46 l

1 l

l

[] Figure 3-4c. Collapsed Liquid Tends

-\_)

PRELIMINARY DATA.

240100.0 SMUD/FPC GAS TEST i.

70.0 4'1

'1-

. mne v -Q VT A S l

,,9 + RV KLd evtv2: i EHL KLV HLLV20 X SGPKLV SPLV20 60 0-OSGPKLV'HLLv21

+CL KLV ci.t v 20 XDC KLV cttv21 x -

x -x " "

Z oo MLN patv20

,, c, . Y SG SK L V sstv20 <

50 0 L

D m

J O

40 0-

. J w gl3

/~' & a N [

v

' 3C 0 B

V '.t l'

W w

J C. 20 0-W.

l m

! 1 i.

I

<t, O-

}ti U y I

• \ "#

I 10 0 l .) l l L' l g , .-. . . - ... - - . ,

0 . 0 i- ~

A ..

}

i u-t l:

I

-i o a , , , ,

3: 0 ,

3:0 : 24: : se: e 2e: : 4: : 4::

i 'u/ OTIS TIME (VIN.) 0=1450 55. 25-A:R-84 i

3-47 L _ . _ _ . . _ _ _ _ , . _ - - - _ _ _ . _ _

i Figure 3-4d. Primary Boundary Flowrates PRELIMINARY DATA 240100. O SMUD/FPC GAS TEST PLOT 17 70 INDEX VTAB

+ HPI catco.

A HPV catcc X PORV catto 80- 0 NET 'catco O

m O

50 O

W F-H 2

m J

, 40.

O w

M 1 -

N 7

a C2 30 .

b O

Z J

$ 23- t i

7 'C l W

< l L 2 y

10 W \

g 2

~ \ \

, E I P CL

< .03 - - -

' "' - - U -

6jo" g,

i t

I

- 5: , , . , . i i 2:00 2:0 0 243 3 26 3!O 400 0 4:0 :

CTIS TIME (MIN.) O=1450 55 26-APR-64 s

l 3-48 i

L.

h

,ew - Figure 3-4e. RV Fluid Temperatures

! I PRELIMINARY DATA 240100. O SMUD/FPC GAS TEST PLOT 111 800.O INDEX VTAB

+ -23.7 Rvicci X -19.1 RvTc02 X -8. 3 RVTC07 750.O_ D 6.8'RVTC08

+ 6 RVTC09 700.O 650.O_

{

m ,

> O i, ) 2  :

s' W l. .

N j

.s , _ _ . . , _ s s

, . . s 600.0 '

CSI ' - -

W

~

__-N-

i 550.0 ,,, m  ;

W '.L cr.

O 500.O MMW

~-

'. 4 5 0. 0_

i 400.0 , j i i i

[] 300.0 , 320.0 340.0 360 0 380 0 400 0 420.0 d OTIS TIME (MIN.) 0=1450.55, 26-APR-84 3-49

O O O rigure 3-5. Primary Pressure - Temperature Trends P-T envelope from SNUD procs (Encl. 8.1 of B.4-21)

Test 240100 conditions from Pzr pressure (PRPR20) ano !!L fluid temperature (HLTC07 at 60').

Circled numbers indicate times (min.) af ter test initiation (0=312 min af ter DAS activation at 1451, 26 April 1984.)

\

2000

\ 0 interim Brittle Fracture Curve "s

\ /

62 9 23 18 75 86

\ 9' "

$ E.'

(Tsat (p) - 100F)

J \ lit n8 g \

g 1000 -

126 138 Satu rati on-50F 2 ggg g Saturation 'j0f 154 N 162 71 500 -

N 176 18 Saturation *

• 95

% 20

• 97 213

% 88 28 "58 88 q-0M 600. #

i I40 0 1

300 Temperature, F

- -- A ' - . . . , , , , ,, _, ., _,, _ _ , ,, , , , , _ _ _

1- Figure 3-6a. Primary and Secondary Pressures PRELIMINARY DATA 240100.0 SMUD/FPC GAS TEST PLOT 1 is00 INDEX VTA8

+RV KPR even20

{ XSTMKPR P59RIC 14C0 _ 7 6200 '

(23 JA 1000 _

2w i el +

+

0 5

0' 1

D

44 L.: e00 (E s

> . I M l 0

L.J 8/sf f E- a

'Cr i C "\_ JT3 j 60: _. -L ,

v, i ig

't Q\ 4%

'\Vn . { ^ *;

g- I l

=

400 y; ,,

r \ i'l

!. Is

\ -

. 2co _ s I

,! . K,-

I, \

1 l l l C

, , . . . i .

l 3:: 0 ss: : _ 4e: : 4s: e 5:: o  !!: : e:: :

! J OTIS TIME (MIN ) 0=1450 55 2 6 - A P.F -8 4 i

l 3-51 Li ..

I Figure 3-6b. Average Fluid Temperatures l PRELIMINARY DATA l 240100 0 SML'D/F PC G A S T E ST I

PLCT 2 7CO O INDEX VTAB

• PRISAT cat :

Z RV avl: catto 6sc 0 ,

XHL AVT: catco OSGPAVT catcc

+CL AVT cateo RDC AVT catro f n ZPR AVT :4. cc YSGSAVT ca s :0 b 600 0 3 7 rvi3 A I CALCO 3

w E

% 550 0 t w

c.

2 y (s N c blw.w t Si'N

~  !

l I

$ sea e ny \  !

es, \.e ,

'g 3

h kTsx 45: :_

c

- , . {

u .

s'{ (\

3 3

s i

. w 5  % )

l D, 4ce o 3 1.,

1 S

h4 '

's v 4 l\ ,

\

A l 350 c_

l k {

x ,

I i

se: : - '

3l,;

, 3f:- 4:: e es: : 5" '

"'3 '"

OTIS TIME (VIN ) *I#50 5E E- ~

3-52

[], Figure 3-6c. Collapsed Liquid Tends

'~'

PRELIMINARY DATA 240100 0 SMUF,/F PC G AS TEST PLOT 4 70 C.

w m . , ,

1

, INDEX VTAB y y- 7,

+RV KLV mvLvro ZHL KLV HLLV20 XsGPKLV 3 SPLV20 s e c _,

O sGPKLv HLLv2t

+CL KLV cLLv2o XDC KLV cLLv2s y y -

x y x _x 2PR KLV PRLV20

. YsGsKLV ssLv2o e

50 0.'

k D

0 c-J O '

4C 0 I

J l u I l

i

/ x i

i i

V -

l i {'

2 c'-l,- A 4 .

,., , y r  :

- I,

, i

i, i i I .

F 2 ;I  !

f I l

. I l ,

< b i

" i i

l '

Y '

e b' , _, ihb r '.' M.A -

&:S ,

n -- h.g_. _

h '

l,

l.  :

I i

-1* .

f% 3;; ; 36;

• 4* O 4 ? ~~ b *'

/ 1

(_) 07:r TIVE (V'N ' 145' 55

." M -A -I' 3-53

Figure 3-6d. Downcomer Fluid Temperatures j PRELIMINARY DATA 240100.0 SMUD/FPC GAS TEST l

,g, ,

PLOT 151 INDEX VTAB

+ -10 0 cer:c2 2 -3 2 ccte:i X -5 cLices

0

1. 8 ctice.

+ -20 C ocatoi I N 6 RvtC1; i

600 0 550.O_

{

m 1

- s O I.-

-  : q s D

J ~

L.

% y

$ 453 Da 'fsat o

O Z

N I O g s I O

\ <0c 0

/

hL

,50 C.

20 o

) >== 0

,,0 0 0= 0 i

,== .

i i

OTIS TIME (MIN ) 0=1450.55. 2 6-APR-8 4 3-54 i

- - . . . . - - . . _ . . _ -- . . . _ . . . = - --

s

[+., l

4.

SUMMARY

Test initialization, measurements, and conduct were appropriate to the test objectives. The results of this test indicate that HL high point venting is effective. in removing NCG; it thus permits a controlled natural circula- '

tion cooldown while maintaining primary fluid conditions approximately with-in the specified pressure-temperature envelope. The gas in the HL U-Bend region was quickly removed by opening the vent. OTIS was then cooled at 60F/hr using (revised) plant procedures adapted to the model.

i O

d T

t i

d O

4-1

I 1

i e

! 5. REFERENCES

1. "0 TIS HLHPV Test," B&W Document No. 86-1149137-00.

2. "0 TIS Non-Condensible Gas test," ARC Technical Procedure ARC-TP-626 Revision 1.

3. "0 TIS Design Requirements," B&W Document No. 51-1149127-00.

4. "0 TIS Test Specifications," B&W Document No. 86-1149120-03.

J I

5 9 r

(

L t

O l

S-1

. . . _ _ _ . _ . . . . _ _ _ _ _ . _ . . . _ _ . _ . _ _ _ _ _ _ . _ _ _ -- .___-__ ~._.

r i

APPENDIX - DATA PLOTS Page i

1  :

1.0 INTRODUCTION

i 2.0 DATA REDUCTION TECHNIQUES . . . . . . . . . . . . . . . . . 3 l e

3.0 PLOT DIRECTORY. . . . . . . . . . . . . . . . . . . . . . . 40 ,

4.0 -0 TIS TEST FACILITY INSTRUMENTATION. . . . . . . . . . . . . 51

---PLOTS---

h i

F h

I i

l l ,

I. i t

Is . i t i 1

A-1 [

A l 1 t

1.0 INTRODUCTION

AND

SUMMARY

The OTIS (Once Through Integral System) data processing program is called 0 TIS.

The program provides plots and printout of the data obtained from the OTIS test program performed at the Alliance Research Center (ARC). In addition to the data reduction routine OTIS also provides plots and printout of several derived quantities. The plots are used for assessing the performance of the OTIS test fability and for qualitatively assessing the performance of B&W raised loop plants during SBLOCA related transient conditions.

The OTIS data processing program is supplied engineering-units data from the VAX computer at ARC either electronically or via tape. The outputs from OTIS readily differentiate between supplied and derived variables by assigning no "VTAB" identifier to all derived variables.

The OTIS data processing program is a collection of subroutines whose functions are as follows:

o List the supplied data without alternation (System Subroutine INLIST).

o Identify the supplied variables (Subroutine SETUP).

o Read the input (Subroutine READIT).

o Reject meaningless data (Subroutine WEEDIT).

o Convert the input data to the desired units (Subroutine CONVERT).

o Derive infonnation from the supplied data (Subroutine DERIVE).

o Calculate mass and energy closure (Subroutine CLOSURE).

o Derforn crimary system mass, energy, and fluid and vapor volume c.alculations (SubroutineBALANCE).

o Print the indexed and derived data (Subrcutine PRINTIT).

o Generate basic plots (Subroutines TESTIT, STUFFIT, and PLOTIT).

o Create general plots (Subroutine GENPLOT).

o Plot SG temperature profiles (Subroutine PLO*VSZ).

o Evaluate and plot SG heat transfer (Subroutine 5CMTRAN).

o Evaluate and plot natural circulation characteristics (Cubroutine NATURAL).

O A-2

p _

A description of each subroutine and the function it performs is provided in Section 2. Derived quantities are identified and the formulation of the equations O used in their derivation is also provided in Section 2.

O This data processing program requires essentially no user input. Exceptions to this occur only when insufficient or a lack of data occurs, i.e. failure of an  !

-instrument required to determine a derived variable.

Section 3 provides a directory of plots which is the output from the OTIS data processing program. An instrument key and location diagram are given in Section 4.

O v

O .

A-3

2.0 PROGRAM DESCRIPTION This section presents a description and the function of each subroutine used in the OTIS data processing computer program.

2.1 Subroutine INLIST This subroutine provides an engineering units printout of all the OTIS test data obtained and transferred from the VAX computer at ARC.

2.2 Subroutines SETUP and READIT These subroutines provide the necessary identification of the variables from the VAX computer at ARC and arranges the data into pre-ordered arrays.

More than 300 OTIS test variables are transferred and each variable is assigned to a numbered position within the complete table of variables. Each position is thus associated with an alpha-numeric identifier (the "VTAB" identifier), and its system, instrument, and elevation. (Instrument elevations are referenced to the upper, or secondary face of the SG Lower Tube Sheet, the "SGLTSUF"; instruments are identified in Section 4.)

Upon execution of OTIS, Subroutine SETUP sets these descriptor arrays, which are subsequently associated with the supplied variables based on their position in the VTAB variable table. An ancillary subroutine (INDEXIT) reorders the suDolied variables by 2ystem, instrument, and elevation, respectively. Subroutine READIT then installs the sucolied data into the pre-ordered arrays. Associated Subrou-tines TAPED and TEXPAND read data from tape and permit analysis of time-based subsets of the supplied data, respectively.

2.3 Subroutine WEEDIT The electronic and imediate transfer of oreliminary test data necessitates at least a coarse review of supplied data for validity. This is the function of Subroutine WEEDIT. The general constraint on input data is that it must vary at

.4 A-4

r least 10-10 between any two successive points during the test period (the total duration of data acquisition for the testpoint being considered). Only limit-switch signals bypass the WEEDIT checks.

(~'}

v Separate validity checks are used for pressures, temperatures, core power, col-lapsed levels, and auctioneered Conductivity Probe (CP) indications.* Pressures are discarded if t. hey are outside the range 14 to.3000 psia. Temperatures are tested against the range 32 to 1500F. Core power and collapsed levels are retained if they are ever non-zero, even if they are invariant. Finally, an auctioneered CP indication is retained if it reads both non-zero and not equal to

-99.* Variables removed from the supplied data base will read identically zero (within the field length of the supplied data); "-99" is obtained when all of the cps of the associated string indicate wetted.

A variable which is found to be invalid by the aforementioned checks is deleted from further consideration (within the calculations for the associated testpoint),

and is " lagged by a appropriate print statement.

t 2.4 Subroutine CONVERT lQ '

G The input data is converted to the desired units in Subroutine CONVERT. The affected variables are: Time, power, flowrates, level, conductivity probes, limit switches, and accumulated flows.

2.4.1 Time Each data scan has an associated scan clouk-time. These times are converted to decimal minutes at input (Subroutine READIT). The clock times are then converted to minutes after test-initiation by subtracting the " reference time" (the time at which the Data Acauisition System was started for the testpoint). Therefore all variables will be keyed to time zero which is defined as the time when the data acquisition system was actuated.

• The"auctioneered" CP indicates the elevation of the highest wetted CP below which all CP's of that string are also wetted.

A V .

A-5

2.4.2 Power The OTIS core power is converted from Kw to percent of scaled full power. The g conversion factor is obtained by dividing the 205FA full thermal power of 3600 MW W by the OTIS power scaling factor (1685.6)*

OTIS full scaled power = 3600 MW/1685.6 = 2136 Kw Therefore the OTIS power conversion factor is 21.36 Kw per 1% of full scaled power.

2.4.3 Flowrates The OTIS primary and secondary system flowrates are converted to the percent of full (scaled) flow.

The conversion factor for the OTIS primary system flow rate, based upon the simulation of a domestic 205 FA plant, is obtained as follows:

205 FA plant flowrate at 100% flod = 157.4x106 lbm/hr OTIS primary system scaled flowrate at 100% flow

= 205 FA Plant Flow Rate at 100% Flow /0 TIS Power Scaling Factor

= (157.4x106 lbm/hr)/(1685.5x3600 sec/hr)

= 25.94 lbm/sec (for 100% or full scaled flow)

Therefore the OTIS primary flowrate conversion factor is 0.2594 lbm/sec per 1", af full scaled flow.

The conversion factor for the OTIS secondary system flowrate, based upon the simulation of a domestic 205 FA plant, is obtained by dividing the 205 FA plant secondary flowrate by the OTIS scale factor.

• The OTIS power scaling factor is defined as:

S = Total number of steam generator tubes in a 205 FA plant / Total number of steam generator tubes in OTIS

= 16013x2/19

= 1685.6 ,

A-6

OTIS secondary system scaled flowrate at 100% flow

$ = (16.1x10 6 lbm/hr)/(1685.6x3600 sec/hr)

V = 2.653 lbm/sec Therefore the OTIS secondary flowrate conversion factor is 0.02653 lbm/see per 1%

of full scaled flow.

Pr'imary boundary flowrates (leak, HPI, etc.) are converted from lbm/hr to lbm/sec.

Pitot tube indicated flowrates are converted to equivalent Primary flowrate; the

' input flowrate (1bm/hr) is multiplied by the number of SG tubes (19), multiplied by the inverse of the approximate integral of the 1/7th-power velocity profile over the SG tube area subtended by the Pitot tube (0.847), and divided by the conversions to obtain % of full Primary flow (0.259 lbm/sec per % full flow).

2.4.4 Collapsed Levels Input collapsed levels are referenced to the SG Lower Tube Sheet Upper Face (SGLTSUF) using the elevation of the appropriate lower level tap. (Corrections for thermal expansion are applied elsewhere). The supplied Hot Leg level O\ -

downstream of the HLUB is combined with the input. SG Primary level to obtain the composite collapsed level on the SG side of the HL U-Bend.

2.4.5 Miscellaneous Conversions (CP, LS, and Accumulated Flow)

The auctioneered CP is supplied as "-99" when all probes of that string indicate wetted. To limit the scale of the CP-plot ordinates, auctioneered CP (elevation) indications are limited to not less than the lowest elevation of the probed component. (The "auctioneered" CP is discussed further in Paragraph 2.5.3).

Limit switches (LS) are arbitrarily offset 0.02 each, to separate their plots for readability.

Accumulated flowrates are converted from gallons to lbm by multiplying by (62.4

[

lbm/ft3 )/(7.481 gal./ft3 ).  !

A-7  !

-_1

2.5 Subroutine DERIVE This subroutine is used to derive additional indicators of testing behavior. The derived quantities are obtained by combining various supplied variables. The derived quantities include- Component average temperatures, Secondary saturation temperatures, fluid properties, CP indication corrected for thermal expansion, flowrate from accumulated flow, Primary system boundary flowrates, and differenced Secondary flowrates.

2.5.1 Component Average Temperatures Component average temperatures (for each data scan time) are formed for the Pri- l mary system components and for the SG Secondary. Primary components include the Reactor Vessel (RV), Hot Leg (to the HL U-Bend Spillover), SG Primary (including the HL downstream of the HL U-Bend), Cold Leg, Downcomer, and Pressurizer. All available fluid thermocouples and resistance temperature detectors are used.

(Averaging is performed in the ancillary Subroutine PROPS).

2.5.2 Subroutine PROPS Liquid and vaoor properties are determined for each Primary Component (RV, HL, O

SGP, CL, DC, and Pr) and for the SG Secondary. Properties include density and enthalpy. Determinations are made in Subroutine PROPS which calls the system subroutines ZZP and ZZTP, portions of the STP package. The STP package is self-consistent. Each property determination, irrecardless of the sucolied state properties, iterates about a single saturation state. Subroutine PROPS obtains volume-weighted licuid temperature, as well as volume-weighted liouid and vapor densities and enthalpies. The subroutine is written in four parts: (1) Initiali-zation, (2) Temperature sorting, (3) Liquid region calculations, and (4) Vapor region calculations. Subroutine PROPS is called once for each 1000 comoonent (Reactor Vessel, Hot Leo, Steam Generator Primary, Cold Leg, Downcomer, Pressuri-zer, and Steam Generator Secondary). Initialization thus consists of identifying the temperature sensors for the current component, using sensor elevation to find fluid volume up to this elevation (subroutine VOLFMZ), and ordering these O

A-8

r temperature indications by increasing elevation (and the volume encompassed).

This arrangement of temperature sensors is then used for the time-based evalua-ON /

tions. The first calculation at each time obtains saturated liquid and vapor properties at the current primary pressure, for use as bounding properties.

2.5.2.1 Liquid-Vapor Interface The cu rent (by-component) collapsed liquid level is used to estimate the liquid-vapor interface. Temperature sensors below the collapsed level are assigned to liquid-region calculations, the remaining sensors are assigned to the steam-region calculations. If there are no liquid-region temperature indications, the component is assumed to be steam filled and the liquid-region calculations are bypassed. Similarly, if the component is apparently liquid filled, only the liquid-region calculations are used. -

2.5.2.1.1 Liquid-Region Calculations The liquid-region calculations are considered in 4 parts: (1) Bottom liquid

, volume, (2) intermediate liquid volume, (3) top liquid volume at the top of the V component, and (4) top liquid volume but with steam above. Each of these types of calculations requires the determination of a local temperature (Tj) and a local fluid volume (Vj) over which this temperature applies. Local volume is used to weight each of the three local properties: local temperature, density, and enthalpy; density and enthaloy are obtained from Subroutine ZZTP using the current primary pressure and the local temperature Ti . (If ZZTP finds that the state is indeterminate, usually because Ti and p aooroximately define saturation, the aopropriate liquid or vapor saturation properties are substituted). Cumulative volume, and volume-weighted temperature, density, and enthalpy, are calculated at each time step; the final properties are these accumulated sums divided by the accumulated volume.

1. Lowest Liouid Volume volume is set equal to the volume up to the lowest sensor; temperature is taken from the lowest sensor, but limited to TSAT = TSAT - 0.001, or less.

v A-9

2. Intermediate Licuid Volume, This calculation is bypassed if only one sensor is in liquid. The number of intermediate liquid region volumes is one less than the number of '

liquid-region sensors. For each pair of liquid-region sensors, the temper-ature is taken from the average of the two, and the volume is obtained from the difference of the fluid volume at the higher sensor less that at the lower. The calculation is repeated over each pair of liquid-region sensors.

3. Highest Liouid Volume, No Steam This calculation is bypassed if there are any steam-region temperatures.

Temperature is the (single) indicated temperature, limited to TSAT .

Volume is component total fluid volume less the volume up to the highest sensor.

4. Hiohest Liouid Volume, Steam Above Volume is the difference between volume to the collapsed liquid level and g the volume up to the highest liquid-region sensor. Local temperature is W the average of the indication from the highest-elevation liquid-region sensor (limited to TSAT-), and TSAT .

2.5.2.1.2 Vacor-Region Calculations If there are no vaoor-region sensors, these calculations are bypassed. Vapor-region property calculations are analogous to those of the liquid region, and are also performed in four categories: (1) Lowest steam volume with liquid below, (2)

Lowest steam volume but no liquid present, (3) Intermediate steam volume, and (4)

Highest steam volume.

1. Lowest Vapor Recion, Liquid Below If there are no liquid-region sensors, this calculation is bypassed. Local volume is the volume up to the lowest vapor-region sensor minus the total liquid volume. Local temperature is the average of TSAT + = TSAT + 0.001 and indicated temperature (limited to TSAT+). .

A-10

r

2. Lowest Steam Volume, No liquid

(] This calculation is bypassed if there are any liquid-region temperatures.

'd Local volume is the component fluid volume up to the lowest sensor. Local temperature is as indicated by this sensor, limited to TSAT+ or greater.

3. Intermediate Steam-Region Volume This calculation is performed only if two or more temperature sensors are in the steam region. The calculation is repeated for each sequential pair of steam-region sensors, low 2st to highest. Local volume is volume up to the higher sensor minus volume up to the lower sensor. Local temperature is the average of the two indicated temperatures, each limited to TSAT+ or greater.

4. Highest Steam-Region Volume Local volume is total component fluid volume minus volume up to the high-est-elevation sensor. Local temperature is as indicated by the highest

( ) (elevation) sensor.

Summary PROPS calculates the following volume-weighted properties for each component, and at each time increment:

Liquid temoerature, Liquid density and enthalpy, and Vapor density and enthalpy.

Temperature-sensor elevations and component volume-versus-elevation, as well as collapsed liquid level, are used to form these volume-weighted properties.

Calculation sensitivity is limited to the maximum elevation span of component level indication. Properties for a state (liquid or vapor) apparently not present in the component default to the corresponding saturation properties, n

( )

x A-11

2.5.3 Modification of Conductivity Probe Indications for Thermal Expansion The "auctioneered" Conductivity Probe (CP) signal indicates the (unheated) eleva- i tion of the highest wetted CP below which all cps of that string are also wetted.

These indications are modified for thermal expansion by applying the appropriate material properties and component (fluid) average temperatures. This calculation is slightly encumbered by the juxtaposition of three materials in the OTIS loop --

Catbon Steel in the steam generator, Inconel 600 in most of the 60.5' vertical run of the Hot Leg, and Stainless Steel (SS 304) elsewhere; the respective thermal expansion coefficients are 6.85, 7.78, and 9.37, x 10-6 ft/ftF.

2.5.4 Flowrates From Accumulated Flows Accumulated flows recorded at the Single Phase Venting, High Point Venting (HPV),

and Relief Systems are differenced, and divided by the duration of the correspond-ing time increment to obtain flowrates.

2.5.5 Primary System Boundary Flowrates HPI (High Pressure Injection) and total Primary system boundary flowrates are determined on the basis of the supplied indications. Total Primary system boundary flowrate is the difference between this HPI flowrate and sum of the Single Phase Venting System flowrate (assigned to one of the liquid-region leak sites), the Hign Point Vent flowrate, and the Relief flowrate.

2.5.6 Secondary System Derivations Feed flowrate minus steam flowrate is installed as a derived indication. Also, two SG Secondary saturation temperatures are determined. Steam saturation temoerature is found (using Subroutine STp, as before) at the current indicated steam pressure; maximum SG Secondary saturation temperature is found at the total pressure at the bottom of the SG, i.e. steam pressure plus the density head of the current collapsed Secondary level (this saturation temperature increase, usually resulting from 26' of licuid, is only a few degrees F but it is useful in the analysis of the SG temperature profiles).

6 A-12

p The SG Secondary Outlet (steam) enthalpy is found (again using STP) at the highest current SG Seconuary temperature (and indicated steam pressure). This highest-( temperature feature is required to mitigate the effects of heat losses to ambient from the SG Outlet steam piping.

i 2.6 Subroutine CLOSURE This subroutine determines the fluid mass, energy and their rates of change for the various components (RV, HL, SGP, CL, DC, PR and SG) and for the entire system, j The component and system mass and energy content, as determined by this subrou- '

tine, are defined as the " indicated value" and are obtained by combining supplied and derived information.

2.6.1 Fluid Volume l

l -

The indicated collapsed liquid level (Section 2.4.4) and the average fluid I

temperature (Section 2.5.1) for each component are used to determine the volume of ligaid contained in each component, and the current liquid fraction (% of full).

I Component volume-versus-elevation tables are corrected for thermal expansion l!] (using component average fluid temperature and the appropriate linear expansion

} coefficients), and interpolated using the current collapsed liquid level to obtain an apparent liquid volume. These calculations are performed in the ancillary l subroutine VOLFMZ. This apparent liquid volume is divided by component total volume to obtain the apparent liquid fraction, expressed as percent of full. The liquid volumes of the Primary system components are summed to obtain Primary liouid volume, and divided by total Primary volume to obtain Primary System liquid fraction.

2.6.2 Fluid Mass and Rate of Change Because the apparent liquid volume (Section 2.6.1) is based on collapsea liquid level, it approximately reflects the volume of liquid required to match the sensed liquid elevation head. Thus the contained fluid mass is the product of contained fluid volume and the liquid density. The total Primary fluid mass is the sum of the Primary System component fluid masses. The mass rate-of-change is obtained by n differencing the fluid masses between sequential time scans and dividing by the kh ,

A-13 L

2.6.5 Power

Available Primary Power, and SG Primary and Secondary Heat Transfer Rates Comparisons of available and transferred power levels are useful for the O

evaluation of energy flow, storage and leak-HPI (High Pressure Injection) cooling effects. Available Primary power is Core power minus Primary system heat losses (Section2.6.4).

SG Primary extracted power is the difference between the energy being convected into and out of the SG Primary. The flowrates for this calculation are the Primary System inter-component flowrates (Section 2.6."'). The specific energies being convected are calculated at the SG Primary pressure (or at another Primary pressure if the SGP pressure is not supplied); temperatures for this calculation are obtained from the SG Primary Inlet and Outlet RTDs (Resistance Temperature Detectors).

SG Secondary extracted power is calculated analogously to that of the SG Primary, except that SG Secondary heat losces are also included. SG Secondary extracted power is the steam flewrate times the steam enthalpy (determined at the highest SG Secondary temperature (Section 2.5.6), minus the product of feedsater flowrate and the feedwater enthalpy, plus the SG Secondary heat losses to ambient (Section 2.6.4).

The Primary available, SG Primary extracted, and SG Secondary extracted, should be coincident under steady state conditions when the ?rimary boundary systems are inactive. Any major differences in these cowers would indicate Primary system boundary heat removal, and/or energy storage.

2.6.6 Fluid Energy and Rate of Change Fluid energy and rate of change (de/dt) are estimated for each Primary System component (RV, HL, SG Primary, CL, DC, and Pressurizer), for the overall Primary, and for the Secondary. The rate of change of fluid energy may be compared to the three inter-system heat transfer rates (Paragraph 2.6.5), but it should be recalled that metal storage is not explicitly considered in these calculations.

O A-14

o Calculation of component fluid energy involves a combination of available quanti-

,o ties. The contained fluid energy is the sum of the liquid energy content and that b of the vapor. Liquid energy content is the product of liquid mass (Paragraph 2.6.2) and liquid enthalpy (Paragraph 2.5.2.1.1). Similarly vapor energy is the product of vapor mass and vapor energy. The vapor mass is determined as follows:

Vapor mass (M y ) is vapor volume (V v ) times vapor density ((v)

My=VyX(v.

Vapor volume is total volume less liquid volume Vy = V - V1 .

Because liquid volume has not been retained, but rather liquid mass (M1) and liquid volume fraction (RJ ), it is convenient to express total volume as liquid volume divided by liquid volume fraction V = Vl /R),

and to express liquid volume as the ratio of liquid mass (M 1 ) to liquid density V1=M/g11 ihen the expression for vapor mass is f') My*VvX(y V

My = (V-Vi yy My = (V1 /R1 - V1)gy My = VI (1/R1-1)gy My * (M/(1)(1/R1-1)Gy 1

Therefore the determination of vapor mass and hence component fluid energy requires the introduction of no new variables. This is significant in the effort to minimize variable arrays, such that large input data blocks can be handled.

Energy content of the Primary fluid is obtained by suming over components. This energy content versus time is normalized to the initial energy content and expressed as percent of initial energy. Energy content is differenced between successive data scans and divided by the time between scans to obtain the energy rate-of-change. The standard conversion (1% of full power = 21.36 Kw) is used to express de/dt in the usual units of power and the calculated values are installed at the time corresponding to the end of the time increment.

A-15

, t 2.7 Subroutine BALANCE ,

Calculated and indicated total primary fluid mass, fluid energy, and liquid volume are compared at each time step, as are calculated and , indicated primary pressure change. Indicated total quantities are obtained directly from indications, they are largely calculated in Subroutine CLOSURE (and receive little emphasis herein).

4 Calculated total quantities at the first time of data are set. equal to their counterpart indicated values (this also applies when a data reduction is started part way into the data set). Thereafter, each calculated total is set equal to its previous value plus the calculated change over the intervening time step:

M (calculated time = t) = M (calculated time = t- at) + at ,

lb, ,

2.7.1 MASS: Total Primary System Flud Mass 2.7.1.1 Indicated Total indicated primary fluid mass (lbm) is the sum of the primary component fluid masses (Mi):

M= r Mj , I b, ,

component Component fluid mass is component fluid volume (V i , ft 3) times volume-weighted component fluid density (pf) $ , lbm/ft3 )-

Mj = Vj pf),j , lb m (Weighted densities have been calculated in subroutine PROPS).

2.7.1.2 Calculated Total calculated primary fluid mass at time t is the sum of calculated mass at the preceding time, M(t-at), and the intervening time increment (a t) times the calcu-lated mass rate of change over that increment (am/At):

M(t) = M(t- at) + at (am/at) , lb m A-16

qg ' -

1 3

Primary fluid mass rate of chmge 6 m/a t, lbm/s) is the sum of the primary system boundary mass 'flo'wrates, i.e.HfI,less discharge:

fN '

p , l' 9

\ ) ,

,tm/5t=%pg- I activea $ discharge , lb,/s .i s

dischar.ges i Q'01scharges include liquid-region leaks and vapor-region leaks. One liquid-region I discharge mass flowratalis suppIfed, it is link'edst'o the appropriate discharge site using' limit' switch indications. The vapor-region discharges (HPV, PORV) are

-) ., s A- >a supplied separately. ! '

),

, s' ,g

'2.7.2 ENERGY: Total Primary System Fluid Energy h (

2.7.2.1 Indicated J 1 s s,

, .w

. Total indicated prim 6fy, fluid energy is found by suming over the primary 1 components:

4 E' = I E(Btu)xkl00/E (t=0)) , T. of initial E

[') ,? '

" compo;ients 4 total q) a .

where (100/E(t=0) is used to reference E(t) to % of initial total energy

,- (c'lculations a done in CLOS]RE).

.f v Component fluid energy (Ei) is found by summing the component fluid and vapor erlergies:

a Ei=Mf1_hj + Vy oy h where '4f1 = component fluid mass (lbm),

h1 = liquid-volume-weighted h'(B/lbm),

V y =vaporvolume(jt), 3 p = vapor-volumerveighted density (lbm/ft3 )

and by = vapor-volume-weighted enthalpy (B/lbm)

(calculations done in CLOSURE, properties from PROPS).

l, A-17 5 e -- - - --

2.7.2.2 Calculated Calculated total primary fluid energy at time t (E(t)) is that calculated at the preceding time (E(t-at)) plus the intervening change calculated:

E(t) = E(t-at) + AE, (% of initial fluid energy) 100 where aE = at e T

net CE(t=0) at = duration of time increment (sec),

e net

= net primary fluid energy rate of change (calculated)

(% full power),

100/E (t=0) converts energy in BTU to % of initial energy, and C= 3600 s/hr  % full power (3412 B/kw-br)(21.4 kw/% full power) '

B/s 2.7.2.2.1 Net Primary Fluid Energy Rate Of Change - e ge n Calculated net primary fluid energy rate of change (dnet) is the sum of the various energy sources and sinks:

net " 4 core

+

primary metal - 9ieak-HPI - 9SG - 9 ambient' "Il PO**

where the individual terms are discussed below.

2.7.2.2.1.1 a Core Core power is supplied (and converted to % full power in subroutine CONVERT).

2.7.2.2.1.2 q Primary Metal Heat transfer from the primary metal to the primary fluid is considered in two regions, " low" metal adjacent to liquid and "high" metal adjacent to vapor; the

" quenching" contribution is also estimated:

9 primary metal

• 91ow + 9high + 9 quench , i full power O

A-18

r low Primary Metal: q low is the contribution of primary metal adjacent to liquid. It is estimated by assuming that this metal temperature responds as

) the (component) volume-weighted fluid temperature. The " low" metal volume is obtained by multiplying total component metal volume by the fraction of the component fluid volume in liquid. Metal properties are approximated as (oCp ) metal = 60 (B/ft3 F). The total primary contribution due to low metal is then the sum over the primary components:

1 V ~T li(t-at)-TH (t)"

= r 60 B H 3 E, C

,d, "" P ** ")

qlow components

'ft'F, V$

Vmi(ft ) _

at _

,s , , B/s j where (V)$

/V$ ) is the ratio of component liquid to total fluid volume and C converts (B/S) to (% full power).

High Primary Metal: q high is the contribution of metal adjacent to vapor and is analogous to that preceding. Similar approximations are made, except that the metal adjacent to vapor is assumed to respond to primary saturation temperature:

'Y vi sat (t-at)-Tsat(t)' p, (3 B 3 V

9 high " components -

ft'F, V mi (ft ) _

at _t,s uH power' C

L B/s ,

Noting the assignments of old and new temperatures (T(t-at) and T(t)) in both q1ow and qhigh, it can be seen that fluid cooling is assumed to be accompanied by heat transfer from the primary metal to the primary fluid, and vice versa.

Quenching: q quench is estimated during component refill only, i.e., compon-ent liquid volume is increasing. Metal power is assumed to respond to the temperature difference between saturation and the current volume-weighted liquid average temperature. The amount of metal interacting is taken to be the fractional liquid volume increase times the component metal volume:

3' B

vH(t)-V)$(t-at)' ft

• 4 quench u

• s, comp nents s i ,

I " "" P **#

[V T

, sat

-T li; (F) C B/s ,

A-19

2.7.2.2.1.3 q Leak-HPI The energy impact of discharges and HPI are:

9 discharge -9 HPI ,

full power 91eak-HPI discharges The components are addressed below.

Dvscharge:

The discharged power-equivalent is:

q = C in h (% full power),

where C converts (B/S) to (% fp),

m is indicated discharge mass flowrate (lbm/s), and h is discharge enthalpy (BTU /lbm).

The determination of discharge enthalpy (as well c.s fluid density, for subsequent .

volume balance calculations) involves discharge-specific state checks.

CLS or CLD Leak: The leak h and g are found at system pressure and leak temperature (using ZZTP), i.e., h=f(P,Tleak),G=f(P,Tleak). If P and Tleak are close to saturation the properties are set to those for saturated liquid.

HLHPV: The HLHPV discharge involves a deliberate estimate of state. A state indicator (KEYPHAS) is set to zero, then perturbed based on several indications of state. The final value of KEYPHAS, i.e., the aggregate of several state checks, is used to choose between phases.

Saturation Temperature: If the HLHPV fluid temperature is more than 2F subcooled, KEYPHAS is set to -1; if the temperature indicates more than 2F superheated, KEYPHAS is set to +1.

Hot Leg (upstream) Liquid Volume: If the Hf volume is 100% full, KEYPHAS is reduced by 1; if the volume indicates less than or equal to 98% full, KEYPHAS is increased by 1.

A-20

_m_. - _ _ _ - - - . . _ _ _ _ _ _ _

r l

HLHPV flowrate: If the current HPV indicated mass flowrate is more than 2.5  ;

times the " base" rate, KEYPHAS is set to -2 (i.e., the previous T and j V-liquid checks are over-ridden and saturated liquid discharge is ased). The

{) base is established at the first instance of HLHPV flow greater than 0.0012 lbm/s (this minimum flowrate to distinguish flow from noise is based on data observations). Subsequent HPV flowrates greater than 0.0012 either update the base, or trigger KEYPHAS=-2 if they are greater than 2.5 times the cur-rent base ("2.5" was established by reviewing data and consulting critical flow relations, but it is unfortunately not unequivocal).

Following the KEYPHAS setting just outlined, KEYPHAS is tested to flag state:

KEYPHAS<0 obtains saturated or subcooled liquid, KEYPHAS>0 obtains saturated or superheated vapor (if P-system and T-HLHPV obtained a state in agreement with the KEYPHAS state check, the P-T properties are retained). Once the HLHPV enthalpy is determined, the HLHPV energy transfer is then qHLHPV = C InHLHPV h,(% full power) f3 RVHPV: The reactor vessel high point vent involves a state determination U which is identical to that described for the HLHPV with the exception that conditions in the RV plenum are used. The energy transfer is then:

ORVHPV = C mRVHPV h,(% full power)

PORV: The PORV discharge involves a state determination similar to that just described for the HPV. The PORV setting of KEYPHAS based on temoerature is the same, i.e. 2F subcooled obtains KEYPHAS=-1 ano 2F superneated yields +1.

The PORV level test is done on the pressurizer. If the Pr is more than 98%

full (of liquid), KEYPHAS is reduced by 1; if the Pr liquid inventory is less than or equal to 98%, KEYPHAS is increased by 1. The PORV uses no base-flow check. Instead, if the previous two state tests obtain KEYPHAS=0 (no net state determination), and if the STP routine returned its flag =0 (indicated L conditions approximately at saturation), then the vapor state is imposed by setting KEYPHAS=+1.

l l

\

Iv A-21

, r --

y-. - , - , . - - _ ~ ,,--3, - , , --

PORV-fluid properties are set based on KEYPHAS as with the HPV; again, if p-T results are confirmed by the indicated state, then subcooled or superheated properties are used.

HPI:

The HPI energy contribution is determined using the HPI fluid enthalpy at system pr' essure and HPI fluid temperature.

2.7.2.2.1.4 g:

"qss" is the energy tranfer rate across the SG tubes, from the primary to the secondary system. Early attempts to calculate qsg from mpri t.h 3g were thwarted by primary flow determination - it is inaccurate at low flowrates, and is sometimes adversely affected by voiding and/or HPI backflow at the flow metering device. For this reason, qsg relies on the secondary energy balance:

SG Secondary: e in * 'out *

• storage or: q pri-to-sec +9SG metal " 9 steam-feed + 9sec fluid storage 9SG to ambient where q pri-to-sec is the sought-after q3g.

oSG Metal: The qSG-metal calculation is exactly analagous to that used to calculate the primary metal contribution to net primary e. Again the calculation is performed for "high" and " low" metal (that adjacent to vapor and assumed to respond to Tsat, and that adjacent to liquid and assumed to respond to volume-weighted liquid average temperature). The approximation (:Cp) metal = 60 3/tt F 3 is again emoloyed also the metal fractions in the two region are apportioned as the current liquid volume. Unlike the primary metal calculation, no quenching term is estimated for the SG secondary.

qsteam-feed: The energy contribution of steam and feed flow are calculated from 9 steam-feed

=0.02653h steamh steam - feed hfeed) C A-22

r where 0.02653 converts steam and feed mass flowrate from % full (secondary) flow to'(ibm /sec), and C is the usual conversion from (B/S) to % full power. Steam and feed flowrates (rn) are indicated, the stream enthalpies are taken at secondary

(~]

D steam pressure and the stream temperatures. (Because of heat loss impact in the steam outlet piping upstream of the steam temperature measurement, steam temperature is taken at the highest SG secondary temperature.

As'c e fluid storage: The energy contribution of SG secondary stored fluid energy is determined by differencing the total stored SG fluid energy at successive times: 'E(t) - E(t-at)' ,,. uH power 9sec fluid starage " i at ,

The stored fluid energy (E) is taken from indications:

E = E) + E y

=M j 6+V1 y oy y6 where M = Total liquid mass (in the SG secondary),

6), n y= volume-weighted average liquid or vapor enthalpy, Vy = Vapor volume, and p cy = vapor density.

\

qSG to ambient: The SG secondary energy loss to ambient, qSG to ambient, is estimated at the current SG average secondary fluid temperature using previously obtained SG heat loss data (calculation in subroutine CLOSURE). For the SG secondary the heat loss to ambient is 9 21.4 (0.0159)(i - 206) 5G to ambient where i for the SG secondary is the average of all SG secondary temperatures.

2.7.2.2.1.5 gambient:

Primary heat loses are calculated from earlier heat loss data, similarly to the previously-noted SG secondary calculation. The primary is considered in three regions for this purpose - reactor vessel (RV), hot leg (HL), and cold leg (CL).

The respective equations are:

]" (1/21 A)(0.0107) d - 200)

RV: q =

amb HL: q amb = (1/21.4)(0.0142)(T - 296) ,

CL: q amb

= (1/21 A)(0.0088 @ - 14 )

A-23

Calculations are performed in CLOSURE, each obtains units of % full power. The 3 regions used regional bounding RTD indications to setT, as was done for the heat loss fits. The HL heat loss is set to zero when the HL guard heaters are energized, as signalled by a HL insulation temperature difference less than zero.

2.7.2.2.1.6 Summary Of Net Primary Fluid Energy Rate Of Change - enet The initial equation for " calculated" net primary system fluid energy rate of change was:

' net *9 core +9 primary metal ~ 91eak-HPI ~ 9SG ~9 ambient It is instructive to tabulate the relations for these components of enet which have been described in the preceding pages:

qcore from indication. (1) 9 primary *91ow

• 9high + 9 quench (2) metal where

'V) . ' ,T)$(t-at) - T)$(t),

( ^}

components 60 OW V y mi at j ,

fVVi I iT

sat (t-at) - T sat (t)l q = ~

60 lV. C (2b) high components (Vji *l L -

and 60 V)$(t) - V)$(t-at)' _

(2c) 9 quench

= I Vi at Ymi (Tsat - T)$) C components - -

where Equation (2c) is only used during refill, i.e., when V)$(t) > V)$(t-at) l i

Each of the components of qmetal, viz. glow, ghigh, and q quench.

tie directly to indications (or are assigned constants, such as component metal volume Vmi, fluid volume Vj , and the conversion to ". full power, C). The l volume-weighted liquid average temperatures were obtained (subroutine PROPS) from 1

A-24

[

observed fluid temperatures, observed levels, and component volume-versus-eleva-

-tion,V(z). Saturation temperature Tsat of course was defined at indicated syste

'~

temperature. Thus no empiricism was used to define qmetal, rather indepen-

- ; dent indications and several assumptions (already described) were used.

The next component of enet was qleak-HPI 9 -9 HPI (3) 1eak-HPI

• discharges discharge where, in general,

-9 discharge = C mdischarge hdischarge-Discharge mass flowrate (mdischarge) was indicated (or was obtained directly from. indicated accumulated flow measurements). But the discharge fluid enthalpy (hdisenarge) invoked a number of tests and assumptions regarding discharged fluid state.

The qsg component was quite involved:

s 9SG " 9 steam-feed + 9sec fluid storage +9 5G to ambient - 95G metal (4) qsteam-feed: required indicated steam and feed mass flowrates, and stream temperatures combined with secondary pressure.

9secy fluid storage: used levels and V(z) to get volumes, and sensed temperatures and SG pressure to find h and a = f (p,T).

I qSG to ambient: used earlier' heat loss data and current SG secondary fluid l

temperatures.

qSG metal: like the primary metal, used current fluid volume and fluid temperatures plus several approximations (and ignores metal time delay).

A-25

.m- 4 . - - . ,.,, , . . _ . , , . - , - . . , _ , . . - . _ , . - . . _ -,-- - -_- ,,.- -_..,. .,..-, ....m..,_-_--..-..-._,.,, , - , - - . ~ . . . . . - -

2.7.3 VOLUME Like the preceding mass and energy comparisons, the rate of change of primary liquid (and vapor) volume is calculated, summed in time, and compared to indicated total primary liquid volume.

2.7.3.1 Indicated Indicated liquid volume is the sum of the component liquid volumes:

I V) = primary V)$

components where V1 j = Component liquid volume, from component liquid level and volume-versus-elevation,V(z).

2.7.3.2 Calculated Calculated liquid volume is the preceding calculated volume plus the time-incre-mental contributions:

'100' V)(t) = V)(t-at) + vinet at " full whereh (ft /s) 3 is the sum of the calculated primary liouid volume het rate of change, and Y = Total primary system fluid volume.

2.7.3.2.1 vi-net (liouid) v *V -V -V +V inet HPI - Vleak ao steam aP where the components, to be discussed next, are:

YHPI

= v1 due to HPI, Yleak " VI discharged (leaks + HPV + PORV),

v 3e = v1 due to liquid thermal expansion / contraction, Ysteam =y1 due to steam generation, and v p = v1 due to primary pressure effects.

VHPI: The primary liquid volume change due to HPI is considered in two components, that HPI mass flowrate less than or equal to liquid-region leak A-26

r-

]

i flow, and that HPI in excess of leak flow. When HPI is less than liquid-region leak flow, V

HPI*bPIpleak where pleak is the density of the liquid region leak fluid. The assumption here is that leak-HPI cooling or heating are felt in primary liquid average ,

temperature (which is introduced in the v3p-term) but that the steady-state leak-HPI mass exchange without primary fluid temperature change (e.g., with core heating offsetting HPI cooling) has no net impact on primary liquid vol ume.

When HPI mass flowrate exceeds leak flow, OHPI is calculated using:

1. 1eak #HPI ~ # leak VHPI

• o leak

. o1 Here.the first tenn invokes the assumption just described, the second term similarly ' obtains no heating / cooling effect of HPI in excess of leak flow (reserving that for the O g term) by introducing the excess HPI mass flowrate 4

(,) at system average liquid density (p)).

yleak: The aggregate discharge of primary liquid from leaks (CLS or CLD), HPV, and PORV are grouped under y leak. As described in the previous section regarding primary energy balance, the various discharge calculations involve tests for discharge fluid temperature and for effluent state. These identical deteminations are used to assign each discharge stream to the liquid-or vapor-change category. For each stream determined to be liquid, the stream fluid density is used to find the liquid volume effect:

leak/#leak leak (Recall that the CLS is limited to subcooled and saturated liquid; the remaining discharges may affect either the liquid or vapor volume change).

O Y .

A-27 i

m ,

v g: The effect of primary liquid inventory contraction and expansiori on liquid volume is estimated using:

p) (t-at)'1 y =

I V 1- -

60 II at components p j(t) where V)$ is the liquid volume in component i, and p1 is the volume-weighted average liquid density in that component.

y steam: The effect of vapor generation and/or condensation on liquid volume is calculated using:

pq . . . . .

v =- v -v -v V -V -V steam V V V metal pf vcore HPI BCM amb where the components ofv y are described subsequently, 3P : The effect of pressure on near saturated liquid and vapor is detemined using:* -

2P gV aP V

lap

• V 1Ea f vH where

1. 3y# .

3y T v sat fg ~f

= 144 v d=M lyf at BP i at aP v

f h fq-778.2

,g f

h h 7

ov,' - -

Sf = 3T

, the coefficient of volume expansivity ( R-1)

P SV 1 fl Kg=- 3p ,

the coefficient of isothemal comoressibility (in2/lbf)

%f denotes the mass of liquid which is near saturation vy is the corresponding contribution for pressure affects on the near-saturated vapor volume The factors 144 and 778.2 convert ft2 to in2 and Stu to ft-lbf respectively.

O A-28

r-2.7.3.2.2 Vapor Volume (n) a Vapor volume change is calculated for display, and for use with liquid volume change to predict pressure (described subsequently). Net vapor volume change (y )

is considered in its several constituents:

vy =v core ~V HPI ~ Vleak ~ VBCM ~ Vamb ~ Vp where vp =vgp - vmetal ~ Van .

the pressure-responsive components of vy.

vcore: Core vapor production is calculated using

. q v

=

v core -

-0.259$0C (hf-hin) _

fg where C converts qcore (% fp) to (B/S), 0.259 converts DC flowrate (mDC) from % full flow to (lbm/s),

and the units of vcore (as usual for v) are (ft3/sec).

,q Core inlet fluid enthalpy is calculated at the temperature indicated by V RVTC02, it is limited to hf or less. If the core outlet fluid is subcooled (based on RVTC07), core vapor generation is nulled.

hp7: The role of cold HPI fluid in vapor condensation is introduced into the HPI term, HPI. Two components of HPI are considered: (1) HPI "AWAY" is assumed to heat to leak fluid enthaloy by steam condensation, and (2) HPI "COND" is assumed to heat to the upper downcomer fluid temperature, also by vapor condensation. The "AWAY" component is taken to be the single-phase lea!; flowrate (CLS or CLD). If CL loop flow indicates reverse flow, the current SG primary liquid inventory change is converted to a mass flowrate (HPI2SGP) and added to the "AWAY" component:

HPI2SGP = (M3g(t) - M3g( t - at))/at The "AWAY" tem 1s limited to the range:

0 < AWAY < mgpt and its contribution is:

5 AWAY (hleak-hHPI) p)

'q  ;HPI AWAY , p h g fg A-29

Tha HPI "COND" , component is set equal to the excess of HPI:

HPICOND = mHPI - mAWAY ,

and constrained to be greater than or equal to zero. Its y contribution is taken over the heatup from HPI enthalpy to that at the upper DC fluid temperature, DCTC01:

1. COND("DCTC01 -hHPI)

HPI COND " og hfg Then the y effects are the sum:

0HPI " OHPI AWAY

• HPI COND (Note the differing assumptions regarding HPI heating used to get the v) effects of HPI, versus those used here for the v y effects). When the DC is approximately filled (collapsed level above 1.5'), v HPI v is limited to no

, more than v vcore

• BCM:

The primary vapor volume impact of the SG boiler condenser mode is activated when the SG primary collapsed liquid level is within 3' of the secondary, and when the SG primary level is within the SG with AFW active.

Then this contribution is:

9 V vBCM " C h 5G o, 3

/s fg where C converts qsg from *. fp to (B/S),

and the calculation of qsg, primary-to-secondary energy transfer rate, has. been described previously in the energy section.

l O

A-30

e-V amb:

g 4,<~/ . System heat losses to ambient are assumed to condense primary vapor in linear proportion to the vapor length exposed to these losses. The two primary components for which this condensation mechanism is calculated are the SGP an'd RV. The calculation of their heat losses to ambient (qSGamb and qRVamb) has been described in the energy section. Then:

amb = (X3g qSGamb + XRV 9RVamb) V g /C hfg where XSG and XRV are the fractional SG and RV lengths in vapor:

SGP X

3g =1- 52 and

,ZRV + 24, X

RV

=1- 31 s .

where both are limited to the range:

0<X<1.

jss O  : Pressure effects onv are considered in three forms: (1) Pressure effects on near-saturated liquid and vapor; (2) condensation of vapor on metal with pressurization,y metal; and (3) compression effects on v through bulk vapor density, vg.

ap: The effect of pressure on the volume of vapor is determined using:

BV O cp 3p q .

f*

• vtP * "vsg at BP h P

g where av g .

'T sat *fg 3 0 144 - l

~

3P 9 n 778.2 g h - fg ,

3v

, the coefficient of volume expansivity ( R-1)

S g = - h9 aT {

P 1 3*gl K

g= 7 3p , the coefficient of isothemal compressibility 9 T (in2/lbf) i O M vg denotes the mass of vapor which is near saturation ,

A-31

v) is the corresponding contribution for pressure effects on the near-saturated liquid volume The factors 144 and 778.2 convert ft2 to in2 and Btu to ft-lbf respectively v metal: As pressurization raises saturation temperature, vapor is

, condensed on the bounding metal to elevate its stored energy correspondingly.

The usual assumption is made that the metal is without time lag, that the metal is adequately characterized by (pCp) metal = 60 (B/ft3 F), and that the volume of metal surrounding vapor equals the volume of vapor (the system total fluid and metal volumes are approximately equal). Then:

[Tsat(t) - Tsat(t-at)] Vy 60 3

!8*

Vmetal

• p h g f at '

Ao : Bulk vapor density change effects on v are:

. V y

p g(t) v3, = Tt' p g (t- at) -

where Vy = Primary vapor volume.

2.7.4 PRESSURE The calculated total primary liquid and vapor volume change are assessed to calculate pressure, the calculated pressure rate of change is compared to the l indicated pressure change. For this purpose the liquid and vapor v's are sub-calculated without pressure effects. Label these volume changes without pressure effects using primes ('). Then Liquid With Pressure Effects:

- +

1*bHPI ' hieak ao - steam aP where , ,

= l, y y -v -v V -v V -v V steam of vcore V

HPI BCM amb metal, O

A-32 t

(_.

. Liquid Without Pressure Effects:

... . . o

(],, v) = v) - v3p - vymetal Vapor With Pressure Effects vy =v core ~V- HPI ~ Vleak ~V BCM - Vamb + VP

'where VP*VaP - Vmetal - Vao Vapor Without Pressure Effects:

s'=O y y -9 p To calculate the system pressure change compatible with the liquid and vapor volume changes calculated, a pressure is chosen iteratively. At this pressure, the pressure-dependent terms of v y ands j are determined, added to yO ' and 10 ',

and the sum (i.e., the total liquid and vapor volume change) is compared to zero.

Convergence is signalled when the total volume change rate at the calculated

- pressure is less than + 10-6 ft /sec, 3 or when the iteratively-set maximum V and minimum pressure change rates differ by less than 10-3 psi /sec. Iteration is greatly accelerated by chosing the successive estimates of dP/dt based on the straight line fit of the last two results. The first two sets of v versus dP/dt are available fran (0)' + Cy ') at dP/dt = 0 and (v) + vy ) at dP/dt indicated. The calculated dP/dt is limited only such that calculated P Pcalc(t) = Pindicated(t-at) + at calc lies within the range 01 p 13000 psia.

2.3 Subroutine SGHTRAN Indications of SG performance are obtained by determining the SG local heat transfer coefficients and the SG linear heat rate. This subroutine performs the intermediate calculations necessary and determines the SG linear heat rate and the SG local heat transfer coefficients as explained in the following sections.

O V .

A-33

--1 w- ,,--+-1,- pew- e ,- -na g ---,-

2.8.1 Steam Generator Temperature Profiles The actual temperature locations vary depending on the tube and the axial eleva-tion. To perform the calculations in this subroutine the steam generator tempera-tures must first be assigned to one or more of four categories:

1. On-nozzle SG primary temperatures - these consist of the fluid inlet and

' outlet RTD's (Resistance Temperature Detectors) and the string thermocouples located in the SG tube which is adjacent to the minimum AFW nozzle.

2. Off-nozzle SG primary temperatures - these consist of the fluid inlet and outlet RTD's and the string thermocouples located in the SG tube which is located in the SG tube which is 180* away from the on-nozzle tube (on the opposite side on the periphery of the steam generator).

3. Composite SG primary temperatures - these consist of various primary thermocouples located within different tubes at various axial locations including the string TCs and the SG primary inlet and outlet RTDs.

4. Composite SG secondary temperatures - these consist of all the SG secondary temperature indications from the various axial and radial thermocouple locations (they are not segregated into " wetted" and "unwetted" categories based on their lateral position within the SG).

It should be noted that in order to define the axial temperature distribution within the on-nozzle and off-nozzle SG tubes, the SG primary fluid thermocouple at 8.1 ft (SPTC05) is included (the lowest elevation for the string TC is 23.1 ft).

2.8.2 Curve Fitting of the Steam Generator Temperature Profiles The four types of SG temperature profiles are curve-fit for plotting and local analyses. Because standard curve-fitting togic requires ordered and single-valued functions, the supplied temperature indications within each category are ordered by elevation (Subroutine ORDERIT), and are condensed to a single average tempera-ture at one elevation when several indications are within 1/4 foot of elevation of 9

A-34

each other. Fitting is performed by a standard package supplying modified spline

~- fits.

'J The boundary conditions imposed on the curve-fit differ between the Primary and Secondary profiles. Because the Primary profiles contain end points (the RTD's) beyond the region of active heat transfer, the imposed Primary boundary condition is no heat transfer, i.e., zero first derivatives, dT/dz = 0, at both ends.

Secondary temperatures do not delineate the extremes of SG elevation, however.

Thus zero second derivations (constant dT/dz) are imposed at the end points of the Secondary 1.emperatures, local analyses are performed only within the extremes of the elevations of the supplied SG Secondary temperatures (extrapolation of spline-like curve fits is not defensible).

These curve-fit SG temperature profiles are limited by the axial density of the temperature measurements. This limitation may be observed by examining a SG primary fluid temperature curve-fit just below the elevation of Secondary dryout.

The curve-fit primary profile drops sharply at this elevation. The actual profile is likely to extend to lower elevations before beginning its rapid decrease, p corresponding to augmented Primary-to-Secondary heat transfer over the Secondary d boiling length.

-2.8.3 Steam Generator Linear Heat Rates SG linear heat rate is the heat transferred per unit axial distance. It is evalu-ated for each of the SG Primary temperature categories: On-Nozzle, Off-Nozzle, and Primary comcosite. The curve-fit SG Primary temoerature profiles are evalu-ated at multiple axial increments, these extracted temperatures and SG Primary pressure are u' sed to obtain local SG Primary fluid specific enthalpy (using property Subroutine STP). Adjacent enthalpies are differenced; linear heat rate is then the product of these local fluid enthalpy differences and primary flow-rate, divided by_ the length of the axial increment. Evaluations are performed only over the range of elevation subtended by the available SG Secondary . tempera-tures, as previously mentioned; to accommodate the total energy transfer to the Primary fluid within the SG, the linear heat rate calculations at the top and bottom increments are modified to use the SG Primary Inlet and Outlet (RTD) temperatures, their increment lengths are correspondingly modified. Linear heat A-35

l rates are expressed in the customary units of Kw/ft, i.e. heat transferred per unit axial distance.

The Primary flowrate used to calculate SG linear heat rate is total Primary System flowrate from the Cold Leg Orifice indication, distributed uniformly through the 19 SG tubes; the SG linear heat rate is not modified to account for any estimate or observation of flow maldistribution through the various SG tubes.

The method used to determine the linear heat rates is only valid when single phase liquid conditions exist in the SG primary, i.e., the fluid enthalpy is obtained from the fluid temperature and pressure which is indeterminate when the fluid becomes a two-phase mixture.

2.8.4 Steam Generator Local Heat Transfer Coefficients Local SG heat transfer coefficients (htc) are obtained from local linear heat rate and local Primary-to-Secondary temperature differences. Local temperature differ-ences are obtained by evaluating the appropriate curve-fit SG temperature profiles and differencing the results. Calculated htc's are limited to positive values, i.e. when local linear heat rate and local Primary-to-Secondary temperature difference differ in sign, htc is set to zero. Local htc's (BTU /hrft2F) are exneessed as base-ten logarithms for plotting and for ease of comparison; log-htc is limited to 0 or greater, plotted log-htc is limited to 1 or areater. Local htc is conceptually the SG Secondary convective heat transfer coefficient, its varia-tions during testing comonly reflect Secondary phenomena (boiling, superheat, AFW effects, and so on). It should be noted, however, that the log-htc calculations just defined use a Primary-fluid to Secondary-fluid temoerature difference. The htc is thus a series-composite of the convective htc within the SG tube, conduc-tion through the tube wall, and heat transfer from the tube to to Secondary, i.e.,

an overall heat transfer coefficient.

Since the steam generator local heat transfer coefficients are determined using the local linear heat rate, they are also valid only when the primary fluid is a single phase liquid as explained in Section 2.8.3.

O A-36

2.9 Subroutine Natural

[ In this section the single-phase natural circulation et 'ulations are described.

The calculations are used to generate four different p . . types. The first type shows temperature versus elevation for a given time. The second type displays the calculated and indicated flowrates versus time. In the third type the thermal center locations are plotted versus time. In the fourth type tha natural circula-tion. driving head versus time is displayed. Following a discussion of the natural circulation equations and their solution, a brief description of the input and output formats is given.

2.9.1 Program Description The single-phase natural circulation equation can be derived from the equation of motion:

. p = - VP - [v t] + pg Assuming that natural circulation is a quasi-steady state then h=0 If it is further assumed that the viscous force tenn can be approximated by

- [v.r] = E! SZ 2 23A

.and the pressure gradient is dominated by the gravity term:

7P=3g and the density can be approximated by the first order expression o = 3 + ao then:

?

• ~

+0#)

O = - 39 + h- 23A2 + 9(

therefore 2 sq A2 ao az

NC, ,

Eu j

'O v .

A-37

For a closed continuous loop with a distributed temperature field the natural circulation can be evaluated by:

2 -

f2cA 9 (PC-PH)( C H

• N C , L " ,

Eu,L .

where, o = average density

= density of hot thermal center H

p = density of cold thermal center C

Z " * *** " *** "*" *"

H Z " * *** " *** "*"'*#

C Eu,L = loop Euler number A

R

= reference area The thermal center densities and elevations are defined as follows:

pH"fPi dz$/fdz$ ZC =fZd da//dad d C" Dd dzd / dz d ZH *[Zi do$/fdo$

where the subscripts i and d mean increase and decrease.

That is, the hot thermal center density is equal to the elevation weighted density i

increase whereas, the hot themal center is the average elevation of the increasing densities.

For discretized data the integrals are evaluated as:

Z =

o g = Io$ aZ$ /I aZ$ H Z$ ao$/ ao$

p

• l d C d

1. d / d C d d and o=: caZ/ aZ where o= p(T,P)

O A-38

I l l

I 2.9.2 Input - Output The input to subroutine NATURAL consists of the recorded temperatures at various elevations around the loop along with the loop pressure. The temperature-pressure data is converted by way of water property routines to local densities. The densities are averaged as described in the preceding section to obtain the natural circulation flow, thermal center values and location as well as the natural circu- '

lation driving head (ao). The output consists of the plotted results. The first set of plots shows the input temperatures at a given time versus the instrument elevation. The second and thini series of plots shows the computed natural circu-lation flowrates versus time and the thermal center densities and elevations used in the flowrate calculation respectively. The last plot series shows the natural circulation driving head (ao) versus time.

O O .

A-39

_ . . - _ . - _ , _ - ~ - _ ._.. _ ____ _ __ . _ . _ _ _ _ _ _ _ _ _ - _ _ _ . _ _ _ _ _ _ _ _ _ _ .

3.0 PLOT DIRECTORY The plots indexed herein are the primary method of presentation of test results.

There are two major types of p'ots: (1) Time-based plots (Section 3.1), and (2)

Elevation-based plots (Section 3.2). Plots are futher categorized by the types plotted variables:

Range of Plot Numbers Type of Plot Time-Based Plots, Section B.1 1-30 Basic 100-109 Calculated Conditions 110-119 Core Vessel 120-129 Hot Leg 130-139 SG Primary 140-149 Cold Leg '

150-159 Downcomer 160-169 Pressurizer 170-179 Reactor Vessel Vent Valve 180-189 Primary Boundary 190-199 Secondary System 320-329 Natural Circulation Elevation-Based Plots (indexed by time), Section B.2 200-219 SG Temperatures 220-239 SG Temperatures and Trends 240-259 SG Linear Heat Rates 260-279 SG Heat Transfer Coefficients 300-319 Primary Fluid Temperatures Throughout these plots, supplied variables have their alpha-numeric instrument descriptor entered under "VTAB", calculated variables contain the VTAB-entry "CALCD." These calculations have been outlined in Section 2, instruments are located in Section 4 O

A-40

e. ,

3.1 TIME-BASED PLOTS Time on the abcissa is displayed in minutes after the start of testing.

\

V PLOT DISCUSSION NUMBER ORDINATE Basic Plots, Plots 1-30 1 Pressure (psia), -

Primary and Sec-ondary.

2 Fluid Temperature Volume-weighted fluid temperatures are shown for each (Volume Weighted, primary component (RV, HL, SGP, CL, DC, and PR) and F) the SG Secondary (SGS). Primary and Secondarv (steam) saturation temperatures are also shown.

4 Col 1apsed Levels Fully-corrected collapsed levels are shown for each (feet relative to instrumented component. " Collapsed" level indicates the SG Lower Tube the equivalent all-liquid level. Two levels are Sheet Upper - indexed "SGPKLV"; variable-index (VTAB) SPLV20 is the Secondary Face). Primary level in the SG, while HLLV21 indicates the sum of the SG Primary level plus that in the HL stub downstream of the HL U-Bend (HLUB).

8 SG Secondary The collapsed and auctioneered-CP SG Secondary levels Level (ft.) are shown. "Auctioneering" obtains the highest CP

(')

V (Conductivity Probe) elevation at and below which the remaining CP's are wetted. Note the testpoints in which Secondary CP's were not calibrated (shown in the Instrument Status Table). The collapsed-level maximum instrument sensitivity and the minimum CP spacing are both frequently visible in this plot.

9 Primary Flowrates CL and DC Orifice flow is shown. Note the calibra-(". of Full Flow) tion limitations of the CL orifice (cf. the Instru-ment Status Table). The conversion from % (scaled) full flow is: 1% Full Flow = 0.259 lbm/sec.

12 Secondary Flowrate The two direct variables are feed flow and steam flow

(% of Full Flow) (auctioneered between the high-flow and low-flow steam and feed circuits as appropriate). The two indirect variables are "FD-STM" and "DM/DT." FD-STM is the difference of feed and steam flow already plotted. DM/DT is the SG Secondary fluid mass difference over each time increment, divided by the duration of each increment. (DM/DT at time zero is nulled). The conversion for secondary flow is: 1%

(scaled) Full Flow = 0.0265 lbm/sec.

(3 O -

A-41

PLOT NUMBER ORDINATE DISCUSSION Basic Plots, Plots 1-30 13 SG-Primary String The temperature indicted by each of the 10 TC's is Thermocouple (TC) indicated; their elevations (ft. relative to SGLTSUF)

Temperatures, On- are given under "INDEX." "On-Nozzle" denotes the SG Nozzle (F). tube directly in front of the min.a.um-wetting AFW nozzl e.

14' SG Primary String The temperatures analogous to Plot 13 are given for TC Temperatures the string in the SG tube which is directly opposite (F), Opposite (and across the tube bundle) from the minimum-wetting Nozzle AFW nozzle.

15 System Energy Energy transfer is shown for the Core, Primary, SG Transfer (% Full Primary Out, and SG Secondary Out. Core power is Power) taken directly from the wattmeter. " Primary" power is Core Power less losses to ambient'. SG Primary power-out is SG Primary flow times SG inlet minus outlet fluid specific energy. SG Secondary power out

- is steam minus feed convected energy, plus SG Secondary heat losses to ambient.

16 Limit Switches 17 Primary Mass Primary mass rate of charge due to HPI and dis-Balance (lbm/s) charges, and net primary system mass rate of charge.

Discharge sites are keyed to limit switch actuations.

The ordinate is limited to -0.1 to +0.7 lbm/sec.

18 Cumulative Primary Calculated and apparent (indicated) Primary System Mass (lbm) fluid mass.

19 Primary Energy Primary system energy rate of change due to: core, Balance (". of all discharges minus HPI (EFLUNT); and all Primary full power) ambient losses (AMB-PU). The net of these energy change sources is also shown. The ordinate is limited to -2 to +61, of full power,1*. = 21.4 kw) .

20 Total Primary Calculated and indicated total Primary fluid energy, Fluid Energy (% of normalized to initial total fluid energy.

Initial Total Energy 21 Primary Fluid Calculated and indicated Primary fluid average Average Specific specific energy.

Energy (Stu/lbm)

A-42

PLOT NUMBER ORDINATE DISCUSSION f ') Basic Plots, Plots 1-30 LJ 22 Primary Liqu'id Primary liquid volume rate of change due to: HPI; DVOL/DT all liquid-state discharges (DISCH); liquid density (ft /3 min) effects (DVDRH0); and steam generation (2 STEAM).

The net of these liquid volume change sources is also shown. The ordinate is limited to -0.2 to +0.6 ft3/ min.

23 Primary Vapor Primary vapor volume change rate due to: steam Volume Change generation in the core (CORE); condensation by HPI (ft /3 min) fluid (HPICON); vapor-region discharges (DISCH);

boiler-condenser mode condensation in the SG (BCM);

condensation due to heat losses to ambient (AMBCON);

and pressurization effects (DPRESS). The net of these vapor volume change sources is also shown.

24 Primary liquid Calculated and indicated Primary system liquid Volume (% of total volumes are shown.

Primary Volume) 25 Primary Pressure Calculated and indicated Primary system pressuriza-Change (psi / min) tion rates are shown.

26 Cold Leg Fluid Cold Leg fluid temoeratures, CLTC01-05, are shown.

Temperatures (F) (CLTC01 has been combined with the SG Primary fluid (Vm) temperatures, and CLTC04 and 5 with the Downcomer fluid temperatures, to perform fluid-volume weighted

, property calculations in subroutine PROPS).

27 Pressure (psia) The RV, SG primary and the PR pressure are shown.

Primary Loop 28 Aoproximate Core- Approximate voided length in the RV (based on level Region Void AP's without flow corrections) expressed as a percent Fractions of the total length of the component.

< 29 Approximate Hot Implied voided length in the HL (based on levelaP's Leg Void Fraction without flow corrections) expressed as a percent of the total length of the component. Note the RV-to-SG void fraction becomes negative when the HL level is greater than the SG pressure tao elevation, about 53 ft, due to the locations of the pressure taos and the liquid level difference in the upstream and downstream portion of the U-bend.

30 Approximate Steam Implied voided length steam in the SG secondary l Generator Second- (based on level AP's without flow corrections) f ary Void Fraction expressed as a percent of the total length of the I component.

g

. A-43

Component-Oriented Plots, Plots 100-199 100-Series Plots, Calculated Conditions PLOT I O l NUMBER ORDINATE DISCUSSION i 101 Ambient Heat Losses Losses to ambient are shown for the RV, HL, CL and

(% of Full Power) SGS. RV, HL, CL, and SGS losses are determined as ~

l functions of component average temperature. HL

, losses are nulled when the HL Guard Heaters are energized. The conversion factor is 1% (scaled) full power = 21.4 kw.

102 Saturation Tempera- Saturation temperatures are shown for secondary ture (F). steam, "SGS", and for the Pressurizer. "STM5AT" is saturation temperature at steam pressure. "SGSSAT" is saturation temperature at steani pressure plus the pressure of the current liquid column in the SG Secondary (i.e., it is approximately the (maximum)

SGS saturation temperature, at the bottom of the generator). "PR SAT" is the saturation temperature at the Pressurizer pressure.

103 DM/DT lbm/sec 1

104 (Component) Liquid Component. fractional liquid volumes are shown for the Volume (% of Full) RV, HL, SGP (including HL stub to HLUB), CL, DC, PR,x SGS (Secondary), and Primary total (PRI). Each vol-ume reflects the collapsed level (Plot a) converted-using approximate component volume versus (heated) elevation. The Primary total volume represents the sum of the primary component fluid volumes, normalized to the total primary volume.

105 Component Fluid Mass (lbm/sec) ,

106 Component Eneray Component Enercy normalized to initial energy is

(% of Initial shown for the RV, HL, SGP (including HL stub), CL, Energy). DC, PR, SGS (Secondary), and PRI (Primary Total).

For each component, energy is taken as liquid mass times liquid sp>~i9c energy, plus vapor mass times vapor specif P A "gy. "PRI" is the sum of the primary ce? -PT energies, normalized to time-zero content.

4 9

A-44

' ^

F s ,

s.

110-Series Plots, Core Vessel

.I PLOT

')

l (n - NUMBER

.O ORDINATE DISCUSSION 111h Core vessel Fluid Available core fluid temperature indications are Temperatures (F) shown; they are indexed in feet relative to the SG

-LTSUF.

112- Core Vessel Available core vessel insulation DT's are shown; they -

., Insulation DT (F) are indexed in feet relative to the SG LTSUF.

113 Core Vessel High conductivity indicates wet, low indicates dry.

Conductivity 114 Core vessel Metal Available core vessel metal temperatures are shown, Temperatures (F) and indexed by elevation above the SG LTSUF.

120-Series Plots, Hot Leg ,

121 Hog Leg Fluid . The hot leg fluid temperatures are shown, from the HL Temperature (F) Nozzle to the HLUB, indexed by feet relative to the

. SG LTSUF.

122 Hot Leg Insulation The hot leg insulation DT's are shown from the HL-DT (F) nozzle to the SG inlet, indexed by feet relative to

, the SG LTSUF.

123 Leg Conductiv- High conductivity indicates wet, low indicates dry.

~

124 Hot Leq Metal The hot leg metal temperatures are shown, from the HL

. Temperatures (F) nozzle to the HLUB indexed by feet relative to the SG LTSUF. The pressurizer surge line metal temperature, at the low point of the surge line, is also shown.

130-Series Plots,-SG' Primary

.131 SG Primary Fluid The SG primary fluid temoeratures (but not the strina Temoeratures (F) TCs), and the HL temperatures downstream of the HLUB, are shown and indexed in feet relative to the SG LTSUF.

132 SG Primary Fluid The 4 SG primary inlet and outlet RTDs are shown, and Resistance Tempera- indexed in feet relative to the SG LTSUF.

ture Detector (RTD) ..

133 SG Primary Pitot. The flow indicated by the SG Primary Pitot Tubes is Tube Flow (% Full shown. Individual tube indications are multiplied by 19 to include all tubes, and by 0.847 to approxi-i Flow) mately correct for the tube flow profile sampled by the Pitot tube. No correction is made for SG tube resistance differences due to the instrumentation.

L) .

s A-45

~

130-Series Plots, SG Primary l

PLOT NUMBER ORDINATE DISCUSSION 133 VTAB SPPT04 samples the on-nozzle tube containing a TC string, SPPT05 samples of off-nozzle tube containing a string TC, and SPPT06 samples a tube without a string TC. The conversion of Primary flow ~

is: 1% scaled full flow = 0.259 lbm/sec. 134 SG Primary High conductivity indicates wet, low indicates dry.

Conductivity 135 SG Primary Pitot Temperature 140-Series Plots, Cold Leg 141 Cold Leg Fluid The available CL temperatures are shown, and are Thermocouple indexed by elsvation (ft relative to SG LTSUF). Note Temperature (F) that the VTAB numbering indicates the occurrence of the TCs, proceeding from the SG outlet to the CL nozzle: CLTC01 is at the CL lowpoint, CLTC02 and 03 move up the CL from the lowpoint to the spillover (50), and CLTC04 and 05 are in the sloping run toward the nozzle.

150-Series Plots, Downcomer 151 Downcomer Fluid The available DC fluid temperatures are shown, and Temperature (F) indexed by elevation.

160-Series Plots, Pressurizer 161 Pressurizer Fluid The available PR fluid temperatures are shown and Temoeratures (F) indexed by elevation (ft relative to the SG LTSUF).

Saturation temperature at PR oressure is also shown.

162 Pressurizer The available PR and surge line insulation DT's are Insulation DT (F) shown and indexed by elevation (ft relative to the SG LTSUF).

163 Pressurizer Metal The available PR and surqe line metal temperatures Temperature (F) are shown and indexed by elevation (ft relative to the SG LTSUF).

170-Series Plots, Reactor Vessel Vent Valve 171 Reactor Vessel Vent The fluid TC temperatures bracketing the RVVV are Valve.(RVVV) Fluid shown (RVTC09 upstream and RVTC10 downstream).

Temperature (F) 9 A-46

f.

170-Series Plots, Reactor Vessel Vent Valve

.. -PLOT f NUMBER ORDINATE DISCUSSION

%]' 172 RVVV Pressure Difference (psi) 173 RVVV Miscellaneous The open/close actuation of the RVVV limit switch is shown.

-174' RVVV Calculated The plotted variable (RVRF20) is the indicated Flowrate (% of Downcomer flowrate minus the indicated Cold Leg full flow). flowrate (cf. Plot 321).

180-Series Plots, Primary Boundary 181 HPI Turbine Meter FlowRate(Ibm /sec) 190-Series Plots, Secondary System

. 191- SG Secondary Fluid The available SG Secondary fluid temperatures are 193 Temperatures (F) shown, as well as SG Secondary saturation temperature at steam pressure. Fluid TCs are indexed by eleva-tion (ft relative to the SG LTSUF). For plotting clarity, only the lowest 9 TCs are shown in Plot 191, the next-9 in 192, and so forth, until all are f3 displayed (usually 3 plots).

\,J 194 SG Metal Tempe a- The available SG Secondary Metal temperatures are ture (F) shown, and indexed by elevation (ft relative to the SG LTSUF).

320-Series Dlots. Natural Circulation 321 RVVV Flowrates Predicted and indicated RVVV flowrates.

.322 Loop Flowrates Predicted and indicated loop flowrates.

323 Thermal Centers Heating and cooling (normalized) densities and elevations versus time.

324 Natural Circulation Driving Force A-47

, m I

3.2 ELEVATION-BASED PLOTS Elevation on the abcissa is displayed in feet relative to the SG Lower Tube Sheet Upper Secondary Face (SG LTSUF). Plots commonly extend from -5 to +55 feet, to encompass the SG-bracketing primary fluid RTDs.

Elevation-based plots are made at selected times, the time of each plot is printed on the plot, directly above the plot number.

SG Heat Transfer Plots 200-299 PLOT NUMBER ORDINATE DISCUSSION 200- SG Temperatures at Five types of SG temperatures are shown: SGPRI SGries Time...Date... (F) (Primary) RTD/ Fluid TC, 0FFN0Z String TC, ON-Nozzle Plots String TC's, SEC, and Saturation. The SGPRI RTD/TC include all the SG Primary temperature measurements other than the String TC. The OFFN0Z and ON-N0Z String TC's indicate all the temperatures of Plots 13 and 14. The SGSEC points include all the secondary fluid temperature indications. The SECSAT plot shows

. SG secondary fluid saturation temperature corrected for level. The point at elevation 0 is saturation at steam pressure plus the pressure of the current liquid column. The middle and Z=52 ft points are saturation at steam pressure; the middle point is

- plotted at the elevation of the current collapsed secondary level. Only these saturation temperatures, and'those of the String TC's, are connected (by straight lines between points).

220- SG Temperatures Temperatures and Trends are shown from ON-N0Z (On-Series and Trends (F) at Nozzle STC), OFF N0Z (Off-Nozzle STC), ALL PRI, and Plots Time..., Date... ALL SEC. The On-Nozzle and Off-Nozzle plots include the String TC's (Plots 13 and 14) plus the bounding SG Primary fluid RTD's, plus the SG Primary fluid TC at 8.1 feet (this TC is needed to define the STC profiles). The ALL PRI plot includes primary fluid temperatures from TC's, String TC's, and bounding RTD's. The ALL SEC plot includes all secondary fluid TC indications. Other than the String TC's, no allowance is made for TC position within the SG tube bundle.

Modified splines are used to curve-fit these tempera-tures for analyses. The measured temperatures are used, except that measurements near one elevation are collapsed to a single temperature and elevation. The 3 primary spline fits use the be ry condition that the first derivatives are 0 at .nd points , the O

A-48

i

'SG Heat Transfer Plots 200-299 O- PLOT Q NUMBER ORDINATE DISCUSSION 220- ALL SEC fit uses O second derivatives at the end Series points. These curves fits are limited by the density

. Plots- of temperature measurements, cf. Section 2.

240- SG Linear Heat The SG Primary Linear Heat Transfer Rates are shown -

Series Rate (kw/ft) for the 3 g'oups of SG primary temperatures of the Plots' previous plots: ON-Nozzle, OFF-Nozzle, and All Primary (temperatures).

The curve-fit temperature profiles (of the previous plots) are used to obtain specific energy change with elevation, calculated SG primary total flow is introduced to calculate incremental linear heat rate (no allowance is made for flow redistribution among the SG Primary tubes).

260- Log-hte LOG 10-hte (heat transfer coefficient) is plotted

. Series for the 3 temperature groupings of the 2 previous Plots plots: ON-Nozzle String TC's, 0FF-Nozzle String TC's, and All Primary temperatures. hte is calcu-lated using the incremental q of the preceding plot,

, - and the local primary-to-secondary temperature difference from the curve fits of the preceding plot.

Heat transfer coefficients less than 10 are shown as log-hte = 1.

Natural Circulation Plots, Plots 300+

i 300- Primary Fluid Each Primary Loop fluid temperature versus elevation Series Temperatures-(F) is plotted and keyed to its Primary comoonent.

Plots Thermal centers are also shown.

J.

2 A-49

I TABLE 3.1

[( .

CROSS REFERENCE OF PLOTTING VARIABLES (SECTION 3)

TO THE SECTION 2 DISCUSSION OF THEIR CALCULATION-l l Appendix Discussion l

-Plot Number- 1 Variable l In Paragraon ...

.. -l l 2- l Volume-Weighted Fluid Temperatures l 2.5.1 4 l Collapsed Levels l 2.4.4 9 'l Primary Flowrates l 2.4.3 12- l Secondary Flowrates, Feed-Steam and l 2.5.6 l dm/dt l 2.6.2 17 l Primary Mass Change Sources l 2.7.1 2.7.1

~

18 l Cumulative Primary Mass l 19 l Primary Energy Change Sources l 2.7.2 20 l Total Primary Fluid Energy l 2.7.2 22 l Primary Liquid Volume Change Sources l 2.7.3 23 l Primary Vapor Volume Change Sources l- 2.7.3

.() 24 25-l Primary Liquid Volume l Primary Pressure Change l 2.7.3 2.7.4 l

191-3 l SG Secondary Fluid TC, Steam Saturation l 2.5.6 101. l Heat losse:; to Ambient l 2.6.4 102 .l Saturation Temperatures l 2.5.6 103 l Component Liquid Volumes l 2.6.1 107 l Component Fluid Energy l 2.6.6

i. 200+ l SG Temperat'ure Profiles, Secondary l 2.3.1 l Saturation l 220+ l SG Temperatures and Trends l 2.8.2 l

L .240+ l SG Linear Heat Rate l 2.8.3 260+- l Log-htc l 2.8.4

,. 301+ l Loop Fluid Temperature Profiles l 2.9

~

321, 322 l Predicted and Indicated Flowrates l 2.9 323 l Thermal Centers l 2.9 324 l Natural Circulation Driving Force l 2.9 A-50

4.0 OTIS TEST FACILITY INSTRUMENTATION The relative location of the OTIS Test Facility Instrumentation is shown on Figure 4-1. Instrument designations consist of two, two-letter groups and a number group. The first two letter group identifies the loop component or sub-system in which the instrument is installed. For example, RV notes that the instrument is located in the reactor vessel. The second two letter group de-fin ~es the instrument type, such as TC for a thermocouple or CP for a conduc-tivity probe. The two number group indicates that the instrument is used for test data and also the sequential instrument number of that type in a component.

Table 4.1 provides a listing of loop component abbreviations and Table 4.2 pro-vides a listing of instrument abbreviations which are used to identify the instrumentation shown on Figure 4-1.

As an example of the instrument designation a test data thermocouple (number

8) in the reactor vessel would be:

RVTC08 RV , Reactor Vessel TC - Thermocouple 08 - Test data sequential number O

A-51

O

' TABLE 4.2 INSTRUMENT ABBREVIATIONS Instrument or Hardware Abbreviation Thennocouple TC Resistance Temperature Detector RT Differential Temperature DT Pressure PR Differential Pressure DP Orifice OR Ultrasonic Flow Meter US Pitot Tube PT l'

' Conductivity Probe CP Heated RTD HR View Port VP i

e f

O .

b .-

O TABLE 4.1 LOOP COMPONENT ABBREVIATIONS Loop Component Abbreviation Steam Generator - Primary SP Steam Generator - Seconda:y SS Steam Generator - Metal SM Reactor Vessel RV Downcomer DC Pressurizer PR Cold Leg CL Hot Leg HL HPI HP Secondary Forced Circulation SF Steam Piping PS Feedwater Pipin9 FP l

l l

O l

A-53

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- . ~ ,

L: '

l Z

l

- i

, i l

< l

~

f

.~1 l

3 , i l I

• - 1 q- *1 - k- -

< l 2

we

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c

, ,,l. .= i , / 4 _ - - . - .

$ ( ,_ m 4- *[=, ' * *' - [ f. 3' 77, . ,~

-+ 5 l Y e I

• ' i

[ { I i i

)I[3 i I\lI i \i ['s -

, ')ai*C.  ; .1 &Gs~~~~~

I o e

! A-62 Cot, t y , , , , ,1 C , nA A

- - ~ _ . . . - - - - - -

PRELIMINAR'Y' DATA 0 0100 0 SMUD/FPC GAS TEST cuar is 233 3-,

INDEA vias

• C ALCD .A 3 g4[ ZINDICD A..a 9 m a l

m.: r te  !

, I d i.

• l C i l

J J v F. l 6

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7 <

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I

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l

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y . -

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w. l

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l i

k i i I

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l j

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.:. .:. ..- 4- . ...

l l

3I[5 i SME (M[N.) 0=i450 cc c c - A CC -5 4 l' A-63 per i ry s, a o v n6TA

PRELIMINARY DATA 240100 0 SMUD/PPC GAS TEST g o.-- ,r i_,

C . w, . ~

INDEA viAB

• CDRE =. . /.v :

E \E T A _ . .A..:

>( : c-it -

,vNI .A... .

~

., des r* I A , A. .:

i; O A nvi' O- _.C ,1, C .k.

I  !: .

i

< i l' 1

Z l '

i 68 ,, ,

l 1'

g .

Q' l t c i l

i; O I  !

t , ,i ,

t-- .

y .: . _ . i k, k .

i a f I i

[

i i d ' '

i l

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18 i wh i t

[ I w , , -

z I

f. .

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e; 4 .

t

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u d, .f 1 l N i 1 j,;

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x

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I

[ j l l l . ... ... <.  :. ..

l

, Ci[5 I [\lE t,\i[N., ):i4IS C' O ' C ~k 9 ~E T i- A-64 poc T .s A .s. .a o v n A ~~ A

PRELIMINARY ~ DATA

( '0100 0 SMUD/FPC GAS TEST

.i: 2]_

INDEA v743

' C A L C, D ,;..:

Z IND ::: a. _:

.:: 23-i i I  :

i I

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i J '

l

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4 i I .

i ,

i

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i -

I s i l $  ! .

\

'g .,

...~-Hi.h x j.~ - 9 I

w i

. c/

• I.

.Y c.

j 2

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g

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2'

< i ,

i \,

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g

+

-l -

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i

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NDiE - inE 29 AuvJL Ai : N At~ :MO r.  :.E

- 3- . .

i.

i i i i i

.:- 4: . c:a >

Ji!l 7:ME (MIN j J=i4c] os .n-AO'-b A-65 Dori T U ,.s.a p v NATA

PRELIMINAR'Y DATA 2.40100 0 SMUD/FPC GAS TEST g

=, .-t .,

w. u .

j T

. % 4- D,7. j v

~?Q l As 1 e, .s a< pcaa e

7-u

,L t. .... ...

I' eLL r- -

• i- .7,-

D 3, I I .,,

T ';

i Ans r i at-l Ke---, ,. :- - 4' . . ...

I i

l l l j l m .. , .

7  ;

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^ -

l J n

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l t

I b i l t ,

l 1 1

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t a

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1 I

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R V------ -R W vg 7' l i X w

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I -

i 5 '

I ** b * *

. 6

( .j

! A-66 l pori Tu .,, A p v NATA

PRELIMINAR~Y DATA 0 0100 0 SMUD/FPC GAS TEST e LJi 4/-

. 0 a, ., -.

[NDEA ViA3

• R v 6P e,==.:

3 .5G D6 PR 2:== :

E X o ci 6 PR 09:= . :

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f$

i i $

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s ; ^

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4 -  !

N ~

l 7 >

t i ,

C' I i'

J s

w

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l  ; 4 x

C 1

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i

. . . 6 i

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i l

.;- y "

i i

h l

, . , . . e

, & = "

g . %IP A-67 Op p i T M , . s. ,1 R < OATA

PRELIMINARY' DATA l 240100 0 SMUD FPC GAS T E 5 i' g

q. ..

.Ye

• m.e l

• N l '

7

-a ' 0 7.. l .

, + . . .

7% e* ,

I "s a e < . , _

L.7*l l

t

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rc l.r...

H 0:v r : A J . a_ .:

i  ;

i  !

l i w l l l i l 2? ( , l C I(, (

3 v - , ,

l* J l  % e i < . (I l

r I (

L a ;j i e

i l 2 , < l w.

f,y. , >

c , . ..

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J. -

~

l L

l H i U_.

~

+

m

., *)

--t...

t '.. p t I c  ; ,1 y v  :

4, ,

_f, h p i

4 e

l i

l' l

4 I

r, ,

j , ..w -._..._._...,,y.

_,d 3

..t.

I

• a. -, * - -

• l

~ ' ~ ' ~ ~

l .

,. e l

l 3 i [ 2. i[VC ,

MI.\. ' = i '+ :: 2 2 c 0 A ~

A-68 DDC TV \ C' < PATA

PRELIMINARY DATA g 0100 O SMUD/FPC GAS TEST a L s6

.s - <-> 1

. , : 3 3 3-.

gg -W INDEX vias

- ,.>Y r O , s, . a 1

.A..a

,_ _ m O Z 4 3 -c 5 w:

~

r

, J W-

. 7 X 2 c. _3 2 o , ~ ._ z.a;

.4'.o i

as 33 "b A...

^3-51 e .A..a l

.v i ,

3:  : 1 z i O

I a '

. ,.)

m l i

< i

& t- -

i u_ t o

m I I C

.' j l

.. . ,. . . s- .

xA .

e +: :: ! .1. n VA - ~ ,  ;

i 9

a i

1 Aff ' l l- ,

L:

n l .

.. f

(

L: t  ;

u {' +

! < ft '

3 ((.h,, '

3I

, x . _.

i e  ! ,

l 6 L [, i t

, c. -

t G

! es ::_  ;

7 i

i >: n. i i i i i

6 i 1

3 4: 3 4:: .:: *:2 .: ..

i OTIS TIME (MIN.; 3=1453 oc 2 c - A D P. - 2 4 1

!I A-69 Opt t T V . , s, ,i p v NATA

DRELIMINARY A~A 4, %:, } u, v, U

O 'VILi -n pp-L -

bA3 I F c- I

- ., ._ _ 1 .

r b r, '

. d 'l s" f

! ./ N.h .\_,

I  ! 3i~ W E- .r..:

s I

1

/s ~

.giic

v. , _ . -.

r ._ l p-I ,

d. . W [* \_  :

! , " : s.9 3 .%. s *. T.

4 . ._

l l .

I T.

"_.=

L O

(,__ # _ . . -

4*

e

( .._ . (

=

. .- 2(

1 X

> +

i

\  ;, =

l, i

e- ...e ,, ,

g ,

~ ' soc

. f.  ! . Vi se*%

vs . v. '_i

't -s ' .. . . ~

~ L ,~

-s .*

A-70 .- -

'l \/i i !\I

-j h,

r 1

1 1

l PRELIMINAR'Y DATA  !

O100 0 SMUD/FPC GAS TEST c._.. .

.m

• d -

e INDr x v7A5

• 5 T Nis A T ...;

35~,5 CAT . A .:

l XCC 1AT a_ .:

i L

I l 1

i i- ,

4

. t I

i s

l

, - j d

5 2

6 l '"mm"-

._. (

4

\

J '-.

\

. ..\

i l

+. a . - - - . . . . _ - . ~ . . - - _ . - - - .

a

_ __ g _.

i I

.)I15 i \t C q \1 [ N . ) = 1 4 5 _ :i .:. c -AC O -i t

! A-71 Dpri Ts,f , ni,i o v nata

PRELIMINARY DATA 240 3;  ; 5 MUD /FPC OAS TEST g ,

L,eie...*

• w 9 9* *y

• 1 M' ". N /I *\ 2 l 'Cv f. '.i .i. _

! E .9 f. . ' .4 f I i r. s

f. . -

, L (, 1. . :

a. s f . 'v X:: r. . ..  :

7

- ._ .: f, .

' - e

~ ~- f.. . .

l _

h a, t

=

d e

r .

.,_q. < .g .:.gg4 - - -

T'

, 4 l

( l Ii.n';,/j

~

. b- L-w -

m n, ' p ' g e .;'.. .

W y

k, w

w#

~

T i.

6 9

. Xz 1

=' (W,Y. }j --

r. .

i .

l- .,

_ s 2

t

? 0 --

Rf t -l- & Z 4 l  ! z ._ . .g -

I i

l_

. - ---z . . .z; _

' M Y

., p

• A-72 coc, r u ,iv A C . PATA

t .

PRELIMINARY DATA' I h0100.'01 SMUD/FPC GAS TEST

'j - PLOT 105  :

7 p' aoo. ' t

, INDEX VTAS t t,

, a.

+ RV KV CALCD -

l i.

,,f* ZHL

. r. KV cAtco i

• ; nd- XSGP KV cAtco '

j f.

700 -

OCL KV cAtto i- e 'DC KV cAtco I,- X PR KV CAL:o I

, ZsGs KV cA,co i J

YPRI KN cAtto.

L e aa. _

f' 4

j. .

.m i

'2 - i  !

. cc .- 3 33._

.a y 3 :' v ,

w

/ 1  ;

' 'A . v  ;

j w  ?' e'

'i ' '-

l. 2 T .i l

l.

4 :.y 1-~ <."_

.

• i -

, o j

. L L i '

e I , s  !

33i _

~

L i ,

75 r

} ,

, y ,

i  ;

-h-i 4 [ }

4 l

I g f

N .-

l s..

t 3 3. - . .,',. ,

i q  ! ' 8 i

.r n? o_  !

c. r l : 4.' f a., i L i '-

. .-. ; r:-

-s i

1

, ca.

.. 5' 2.

' "] < 3y * .i

+

., ,m l-g/ .j l .i  ; -

t: v p  ; I s

. .. . . b- '

I

• l l w.

.f( ~

~,z., l} g-k,-Z~,rL P i

l l l. I i i'

' ~

"[,t .

~

0- ,. 203. 403. 003 333 '003 'E s ,~,

'OTIS. TIME'(MIN.) 0=1450.55 26-APR-34 l

. ,e .

.e, .

pt -

v&' ' ' '

A-73

.0 3

., l p p c- l T M i av A PY NATL 1

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g PLOT 106 4:3 O_

INDEX VTAB 1 p...v K' r_ v 4 .- .. .

EML /(E C A . '. O X SG p r;E c A. :,0 350 0-- o, A r_ ,Au,..

'DC r;E Au;o.

IS 6E ;A.;D Z:Le- er .A..-- -

1 N'pO! t. r_

3:  : -.

u l

Z l

.1: :_

~

c p 5  : : _. ,.

t_ T

[~MV ;E

f ' .j i'

~)

.e .. t .

' 1.-

fl z, f s

f:

M

.:: 3-m i

l=f'n --~kgk _ <s t

u- E -

l Y b< '

i z..f .<..c--

( fV -

i

s. ?Y i

,, , m ..

.s-l l v.....=..-

l 1

j l l l 3 to: ,3 c:: a:: .::: ..::

OTIS TIME (MIN.) ]=1450 55 2 6 - AP R -5 4 I A-74 DOEi r g a , ,s, a cv NATA

PRELIMINARY DATA C 0100 0.SMUD/FPC GAS TEST PLOT 111 4 1000._

4 INDEX VTAB 4 * -23.7 evic0i ~

2 -19.I Rvic02

. X _a. 3 evic07 i- 900 - 0 6. a evTcaa 1- 6 eVic09 4

a 00.

+

~ 700.

v ct .

.00. .

j. ]' (

C jhmM a ,

L 4 i -

.a

\ \4 l 4

A L.:. '. t00 .k -

1

% i

> j ,

, L:

4 e

i o

-J;

+ l j.- '400 ,

i I

a 0 0. _, a

'3 I

200. , , , ,

j. ,

O. 200. 400. o00 300- 8000- 1200

j. 0 TIS TIME'(MIN.-) 0=1450.55, 2 6 =-A P R -8 4

' A-75

.x.--- - -.-.-.._ _ -. .

PRF i -ThA i iu A RY DATA . - - ... _ - . _

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g PLOT 112

-45.00-INDEx VTAB (b MW ' .3 %crai ~

2 4. 8 %cro2 l

-51.33-. I 1

-57.05

^ -e 2. 7 7_ .

t_

f I i

u l o l  !

j -63 23 i O

m z

_J h 1 W -7 4. . I i i

> i i l i e i

~

I l C '

o  !

a i I ,

-72 at l-1 - ,

i

-as e 7._

i p I ~[.

-+

,j q j M! t .g - jj_ tt .

l

.:h &L l 1

~ #

i i i i i i

0. 2ca 400 eaa aaa ,Jac . 2 .' :

l OTIS TIME (MIN.) 0=1450.55 2 6 - A P P, -6 4 2

A-76 i PPFI T hA . ,u a P Y DATA

r h

L.  :

2

~PREL~IMINARY DATA-k,J SMUD/FPC GAS TEST

@ 0100.0 PLOT 113 '

t. 60 INDEX VTAB ,

+ -2. 4 avcoo2 >

X I -

-1 4 evcasi

i. .. X 6!evcoo4 i 1.40_ Q pqqeo)3 i

. 1.-20 I .x. - I .

y *

[' M' i O

l 5 i u i.co_ .l ic

.v.

1 i

. Oi_.

.O Q .-

an =

i._  !

,- z i o j-

. O  ;

l' .; -%

, m e , w. co_ -

i 1

l x i i 'g o u.

(

4o m .l e U

'Df l ' ' ,q j 40 Q 2

~Al  ;

)

L ,

i- Ik e It  : 1 l

~*

LO 0 .

200. 400 000 e30 ioco 1200

!- OTIS TIME (MIN.) 0=1450.55 2 6 -A P R -8 4

~:. ~A-77 P R F I T M , . s -\ R Y DATA

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g PLCIll4 10 0 0 _.

INDEx !viAB

• -16.OesTcaa ~

X -11 3' evic 35 X -9 9 e, c33 930 - 0 - 3 a.T;it

• 4. a =  :.2 333 i

t

^ 7 0 0 -l -

L a

a

00

< 33- -

.  % ~

L 3

t U  ::: _ N -

g w

e

> \ l o  :

?,i a j saa ! 'k i

i\ l

\ t l .' l 1\

x\

200 _. s% -

433 a

i iaa i

,aa i

oca aaa i

.000 .:::

h OTIS TIME (MIN.) 0=1450 55 26-APR-84

A-78 opp j T M ,,y APY NATA

i dB]lIWINVBA OVIV U,OL00 0 SWnO/d.dO DVS 13SI dl01L3t t0CC' ING3X AIVS 4 g I HlloC!

g 6~I H,ioCz

' X 20 0 ",ioCt eee - o go 0 >>,ioCt po e u,lacs x 9 0 0; u' loc 4 Z 9L P 4,ioCe A

PCC' 0 clu'alCt v 1C C' ~

, f m '

, i a i r  ;

J[,.

o:C

~

i

^^ :. - , .T ~ ^

r ,

C 900 " f m t r  ;

I i

O a

i i

PCC' '

1  :

1 j i

F CC' -

1 i

i I

l

).

N

?CC i i t i  !  !

O' ?OC *CC' oCC PCC 'CCC' !2Jt OlIS IIW3 ) WIN'( 0=ttsO 99'  ? 9 -V d d'-9 t

V-46 d d J ! L. NV ' ' T d A OVL V

PRELIMINARY DATA 2'40100 0 SMUD/FPC GAS TEST g PLOT 122

-4.50 INDEX VTAB 2 4nuorai ~

3 12. 6 necr:2 N 23 O n DT;3

- 0 34 5t nacT34 g

40 2 n_OT M )

v 57 4., nuCT:e g y ,-J Z 65 9 n.:::7 4{lb,p qM ll 1 y' f

^ V 57 i n :-::a

-14.33 e.e L i 9

' , . ,l l.

i

.m

35 #

13 g4

\R b i O

d _;4. ,5 It  ! .' '

N I I il f j h :i , 17 7

? \ iI l l l i I / i ,. ,

q _;9 ;e ,  ;, ,

ZJ T jDJ ./D L AVN ,

Ie 'l '%

\ A '

I

.. /"E ~ .

b ] -

IW j, 1 Q

=

Ri ,/ I '

) ,%hd I f '%f W- _

-33 3E } f i

', p.- fe_v~- i ti 1 df , -h g. p

! $l 1 L _ E y{ a 4, , 4 -

l- b _

f, '-

A i

-32.23_

I .

i t

~4 2 2 i

3 i

100 i

4n i

oa, i

saa i

,c,'

i

. ~'

g OTIS TIME (MIN.) 0=1450.55. 26-APR-84

A-80 i

PRFI T M . s,a R Y DATA

PRELIMINARY DATA 0 SMUD/FPC GAS TEST

(')0100

\,_,

PLOT 123 1.60 _

INDEX VTAB

+ 1 0 stcPoi Z

~

15.O secoo2

, X 35 O ne c p o.3 i 40- 0 37. Oj necPor 61 0 nt;oic X 65 d nucoi:

Z 6 7 i sucoi2 1.20 O i x  !

O N l u

u ..Ja_ .

3:

v l C

• ,._ l t~%

, L- ,

Ga >, 2%.

o  !

a

/

f..':,W x N ,

jj s o e3_

U ll f/

w - }/

c  ;

l

,; t 4o 'MC+N bv  !

qpar-- y i

l WW9  !

.2c_ .!

l l

1

,O - 3 0 --

i i i I '

l ( )

O. 400 433. 600 203 8033 iLO3 1

l OTIS TIME (MIN.) 0=1450 55 26 -ADR-8 4

A-81 P R FI T M iiu a R Y DATA

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g CLOTi24 700.O_.

INDEX lVTAS

2. ntTC12 -

Z 12. 7 n :a 3 X 23 7 scTci4 esa ]_ O 34 S nm ;;c

^ 46 2 n T;is X 57 2 n T;.6

_ Z 65 9 ,.T;;;

Th Y 57 2nT;i7 600 2 ' --

Z r., =c7;:7 I, '! c I  !  !

O _lb.m h~

t k

.g]! '

v  !?

~ 53: \\ ' ,%\.!

L X\

l ./

L j - Z '

\

\

,e

\

I

]\{ \

2 1 1i i

\

1 j 5;: : '

.},-

u. 4 -

i 2  ;

'{

l ,

y~' V l \

45

.J e -

_: [,t' ,(

2 ,i 4 :a a r.

I 4

l <

l 1

1 3= 3 \ -

i 1 \

l 1 y

\

\ \

l 3:3 3 , ,

l o. 200 4:3 o:: e:: i :: -

l OTIE TIME (VIN.) 0=1450 55 26 - APR-3 4 l- A-82 P Rf l T M , n,A o v DATA l

PRELIMINARY DATA o suuD/FPC GAS TEST 040100 PLOT 131 eaa.a_ "

INDEX IVTAB Au# -

e w j j (% Z

-4 / etica, i

" , ., y :vr- d 8. ij sorc 5 X 17 3 307c 4 55U U- i O 35.3jsorc: 2

• 38 2 se ;;2 X 47. I sorce.

Z 5 9. 9 n_7;;3 v -2 9':=er:4 5**

• C l c. 8 8= ora:

I , M 53 i :ce::.

I l .

i .:.  !

i i

'h

~ 45: 3_

L_ ' '

{  ! .

v s

ct ,

2

.-, , I c

--  ; .e l

D \

a .

L ir 353 )_

N 2

c' j '

a -

\

) )%

,,3.,

Qa -

L 'N-1

~y l l

45 3. J -

i i i i i i a 200 430. nas a2: .:a

, OTIS TIME (MIN.) O=1450.55 26-APR-84 5

3 A-83 pppj T hjj , , y .1 p Y NATA

l l

l PRELIMINARY DATA l

g l

240100 0 SMUD/FPC GAS TEST j PLOT 135 t o03.0-l INDEX iVT AB

• 0 O spT;te 3 ;jpy~4.; E 2 0 0 scT;;7 -

- X 0 0 sorcia

550.0_.  ;

(

t i

_a: 3 I

l l

I m ,!

i i

a o 40: :

.- i m  :

c.  !

l i z l 2  ::: .: _

'  ! r I

9, . .

l i 3:: l .-}

l

i l

l

'%x

.m.

2:1 , 7

,ca eso aca

.o:: ..:-

h a 2:

OTIS T E (MIN.) 0=1450.55 2 6 - A P R - 5 -

f A-84 DDEi T h. A ,,SDV NATA

^

! ., PRELIM'INARY DATA g 0l100L..;0 SM.UD/FPC GAS TEST PLOT 141

.:. .'6 0 0. 0 ' -

l INDEX VTAB

~ +L -4, 5 curc02 1F . 2"4 - 3. "% ; E -- I!CLTCO3

-e -

g ,

55010_ 1 -

S03.0 i

^ 450.)_ -

L.

• y ,

2.

O w!-- _g. 420. 3

-1 a.

u_

' .w a s ] O_ ,

-Q l.

to

a ,

3D. 0 253. 3- - l b

230 0~ , , , , , i

.o. 200._ 400, osa an .000 a::

OTIS TIME (MIN.) 0=1450.55 26-APR-84

. ~t . A-85

t. . . ~ . ..

'P P F I T M'..s a R Y DATA

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g PLOTj32

{ INDEX VTAB d A

- 2 . eJ s e a.T s. .-

'@W Y. 3

~

-2. 6 scc;;j

" X 53 i scu n 553'3- I O

, 53 it s=c.r::

• l 8

l I

.\  ;

\

5:a a i g ,

l

\ i

!^\ \

t c

\ ,i

^ 45a ]_  !

L. i  %- I v i  !

a i i cc l e i

4: 2  ;

o '

i J ,

' I t

w l ce ,

)

40 - i I .

\

c'  ;

ct i l

- l I i 22: : ,

, l I

l 1 i

i l .5 3 J. l ,

i f

I i

'33 2 i l , [ ,

a .ca 4: 2 eaa aa: . :: .;::

OTIS TIME (MIN.) 0=1450 55 26-APR-54 A-86 PRPi T AA . ., a p Y DATA

1 dB3lIWINV8A GVIV

))tol00 7

0 SWnG/d.dO DVS 13S1 G

dI01tEC I N G 3 '> A1VG

+ -t bseelet g -t seeics

. y -L seelc9 it ec-

+ i

!? CC -

t i

r i "4 -.

2  ! ti l

tccc{ ,

{g 4 ,

^ i j a- ,

I ,

$ y O? f[-((' #,h

11 ' I  !

i

~

~

IL ld.

fh. l '.

2 c;

o ec-l! ' I !,

l f ,I p

a-- -

's I ~

a y

• v t y t' c;~

i

@ ' hvrg q,4.pj t"r' r ' Y J i

c l:( t

                                                                                                   '    f          \             G i                                                                                                     ,9,
                                                                                                                             - 4 1

],l l\,

L U

                                                                                                                                            /J*g'\

(

                                                                                                                              .      j e cn-                                                                                                        y1,
   )vC                                                           '                                           '                              '           '        '

O' ?CC *0C~ oCC ECC '00C .?;; OlIS IIW3 )hIN'( 0=t99C~99 ?9-veb-9t i

V-84 d d d.1 1 NV ' "' ? b A UV1V

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g C LOT 134 50 INDEx tVTA9 x - O s, . 1: n ;c16 _ Z 60 3 nmcoi4 X 64 9 m: cia 70

                                                                                                                                                                                                            .t/

l  ! l ll i l,

                                                                                                                                                                                                     !.       I o:---                                                                                                                                                        s*   ,
                             ^                 l                                                                                                                                                         I i

z" i X ( a ' i N i g  : : _l ' lI v  : l

                                                                                                                                                                                                                                    /no[ofvo

_ p.-_ _ .._=.._-> .u . .- . m . . ag /'Y 3 ., a _- Z O I -, J  : ,. I

                                  >-            i                                                                                                   ;

z 7 e' g .5 : _i% pg7~ -

                                                                                         ,r-~2                                                         y                                                                                                                               -

t E Un .p p . Q s< i s3d I i I i aad -

                                     - 3 3-a.

i i 003 a;;

                                                                                                                                                                                                                                                                       .:3_

g JTIS TIME (MIN.) 0=1450 55 2 6 - A D ;i - 3 4 h A-88 Coci Ty , ,1 o v n r, T /i

s *

         /

PRELIMINARY-DATA g o100 OL'SMUD/FPC' GAS TEST PLOT 151

                      - ,0 0 0.

INDEX lVTAB 1

                                                                                                                                               + -10. 0 ocTc02 X-  -3. 2l ocica i X       . Si eticas
                        $co. _                                                                                                                 O     1 dcuico4
                                                                                                                                               * -20. 0I oca.T as X         6' wTct eaa:

i

              . n      .Ta3_,                                                                                                                              -
               .w v.
               . ct .                                      j
              -s                                           -

i I Su.c' l  ! e'3 3 ',  ;

m. ,.

o l __ j

               .a.              - _         -   -

L, , 2 i.

-w e: \ i j

ss.  : 31_ \ - o -\ o 5:

Z- \  !

3 f

                                                            }                                                        ,

o a i ,

4aa _ l l

                                                          -l                             -J
                                                             !                              5                         i
                                                              !,                                    \                 ,

1' I

                         ~4 01                 ,_                                                 ;                                                          i i                     4
                                      ),       203         400.                                  o00                200                     '001         '   '33 OTIS TIME (MIN.)                                      0=1450.55,                      26-APR-84
      .-           '                                                                          A   u .. . . .
                                                    .P R E L I M ,, d Ps Y                                       DATA                --_ _-

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g PLOT 16 ] 7Ca a INDEX IVTAB 21 's = =.: c a i X 3 4. 2 c= ;22 X 46 5 ==r;;a 653 U- O o; S AT ;A ca 2 l , 7 m _ . _ _

                                             ,j

[ i al 6: i i Yi l l i

t. T ,

I \ , I

     ^ 55:     3.]

u_ v , I \ CL i i 2 i 5 a  :....

     )              f
                                                               \

a > s u  ;

                                                                   \
                                                                     \
                                                                         \

N

     -   se: 2
      ~                                                 +                   '

5., h ' N L. , Y x 1 , X 4:: a /

/

as a_ . 3: a- , , a taa .3 c:a  ::: .:::  ;.-- OTIS TIME (VIN.) 0=1450 55 Jc -ARR -2 4 h A-90 DRFi T M , n,A R Y DATA

                                           -PRELIMINARY DATA.
 ^

T" 0 SMUD/FPC GAS TEST A)0100 Pi.0 T 16 2 INDEX iVT AB

• 3. l' ==.07:4 E 12. I peoro. -

X 27. I peorat

                 - 6 0. 0_                                                                                    .
                 .43.3 23.3.                   -'_                                                                -

a a3-sh- M M w, ' L$' -p

                                                 .        %ay 6                                                   !!   1
                                                 -            l\
                                                                \
              =
      ~         ,: ;_                                                                                           .

g 3 )i 3 ' Il .)k h E  !

                 -- e s
                                     /(          l   .
                                                       )               \

i _ _ NL Lj,1

                  -s a . a.                                                                                      .

l Q -83 3 o. i 203. 403. i eso l aaa i

                                                                                             .c0,             - --

i 0 TIS TIME-(MIN.) 0=1450.55, 2 6 -A P R -8 4 5 A-91 P R Fi T M ity A R Y' _ DATA

PRELIMINARY D A T .A 240100 0 SMUD/FPC GAS TEST g. I 700.O PLOT}63 INDEX '/ T A B

2. 6; =er;or _

3 3. i ==r;ii X 1 2 . 2 oer:. n oso 0- O ie Q ==7;34

• 27 i ==:::a b d g X Z

36 5 ==r;;5 42 3 ==::::

k. 46 5 = erne

t. .

                                                                                          .t r
                                                                                       ~

x t, th 6

                                                                                                                    . \,
                                        .,L      @          -r                       '1 I.-\
          - 5 5 a a _.g ti 1 't 1

a 3 S [ L-a i

                                                      .L          \           \4.
                                                                                                           .t.. T, j~ _.\              .ti i

l\t i v

                                                            " {s l. i
                                                                   >                                                    n     T i

( j 3:3 ;I L: , k\ t Y l t_ E ( U-l 7 "

                                                                                                                            ,           g                                                       ,
                                                                                                                                          \

N ' u 4:- , N .', . e i N  ! o ' N.  :

s. *

                                                                                                                              .t.                                                               !

r - k '

                                                                                                                                                                  ?                             .

1 / 4:: a ' l

                                                                                                                                   \/      -
                                                                                                                                                             %-                                 l as: ] _.

l  ; F

                                                                                                                                             %o

• ac .

a 2:c. 4as eaa ea: .:)) . :: OTIS TIME (MIN.) 0=1450 55 26-ADR-84

A-92 DDFj TM niaOV nata

PRELIMINARY DATA 0 SMUD/FPC GAS TEST QO100 PLQT]7] INDEX VTAB 6 "!VT C O 3 E 6l OvT:i3 900. _ I 5:0 l i p 7:a _ t O I

       ^

2  ! xC

    ]m     , _._ .

5 a N t

                                                                              ~

I l .I y- -__ M\

        >                                                                        \

3: - ,

I i

        >                      i                                                       4 l

z \

                                                                                               \

l

            ,,.                                                                                   N
                                                                                                     \g N,s O

g  :: 3 2ca. 43 c:a a3: .0 - ... OTIS TIME (MIN.) 0=1450 55 26-APP-54 A-93 093 t _ _ _ _ _ _ - _ _ - _ _ _ _ PRF!TM,,4Pv NATA

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g PLCTl72 8.C0-INDEX lVTAB

                                                                                                                                                                                                                                                      +      b " /D P 3.5
       . 40_

l I l m., i l l i C I  : A ..

                                        -                                                     i,                                                           ;
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l  :

   't                                                                                          .

t s i m 4

   '                                                            i -

i,

    '>                                                                                          i e-,

i  ; ev n r' I l ' 4:_ 1

                                                                          +     'j 1

i

                                                                                                                                                                                                                                                                ~

h. }' .. ft ['

f Q)i NJ l%. [4 d .

                                                               -f                          .

g l

          ~

i i i i , i a .30 403 oc: e:: .::: . :: OTIS TIME (MIN.) 0=1450 55 2 6 -A M-5 4 ? A-94 DCEi TA/ ,nov n 6 T A.

 ' i_.

f5 PRELIMINARY DATA 6f00'.-0 LSMUD/F.PC .G ASl T E ST PLOT 181

                               >So INDEX            VTAB
                                                                                                         + -9 9 9. O        n o Tuai ~

Z -9 9 9. 0 n o iva2 X - 9 9 9 . 0 riorv as To_

oo x.. -

o. i ,

n .w. -  ;

    , . ';m                                                           4 4               -

j;. "  ; N -  : i ,- 2 >

                               .n;                                                                                     .
                . JCD )                                                                                                !

,C ,r v l i .

g:--

o. l l

                                 ._                                                         ,                         ~!
                ; co :         .A s                                                         ;                          ,
          ~

L - 96 i, l. i l L--

                                                                                            .                           i iz                                                                       j J
                -e.            .3:_                                                          !                         .

i, .,  !

                .. Z :

I r

                 -- 7 1

2: -

                                                                                                                      'I
                                . . o.                      --
                                                                                            }                           .
   ~

I 30 :r -

                                                ,T  _ - .
                                                                   ~

-..R. D" ' Y i ,

I a ... 200 433. oca. ass .003 .::: OTIS TIME (MIN..) 0=1450.55. 26-APR-84 I . A-95 m .- .. PRFI T A A - , ,y, a P Y nata

l 1 l PRELIMINARY DATA i 240100 0 SMUD/FPC GAS TEST g PLOT 19) oaa. c_ INDEX v'T A B

• 1 5 ssM :.

m.~m,._ -r d

                 ..__m-
               . s ,n        ,e,
                             ._  -                                                    g       4 gi ,

a.. X a  ;; s n ;;3 552 a_ , o 11 ij .e. . _, -

                                                                                                                     ,4 l
                                                                                      '    1 4 . i: ::n :5 X    17. 3 :r;:c Z    20 i. _;n:7 Y    -

4 .z 1,. 2 .:, ....: l sa: ] -f aC , ...... a, l .a..: M S T M S A T.:

                                      ,                                                            I I

i m se: :. . i i c 3 I H

     ~                                     ^ l t-                          i                       j 4:: ;                                It j     a

( I j i o i . l J > L ' .

     ^          '

I  ! Z l o  :: :j .i i

o .

                                                     .                     1 L*                                              I

( A ! I a I' I n -

                                                            =

h l n: a ,  !' ! i  ! i k l

                                                                \ DD        !                         ,

! 5: _ 5 i i i

        '00'3                                                                       i                  i i             i                       i           i a      .:a        4::                        ca:       a:a     . ::          ..::

OTIS TIME (MIN.) 0=1450 55 26-APR-34

A-96 P R F i T AA . . , A R Y DATA

                                                                       ~

PRELIMINARY DATA 0 SMUD/FPC GAS TEST (G70100 PLOT 192 saa.a- , INDEX VTAB

                  . ua iu m - += d

• 26 3 ssic]3

                       @ ' !?                                                                             Z    29 2,ssici;
               ,                                     .                                                    X    29. 2 ssT:i; 553 3-                                                                                        0    35. d ssT ;s

• 35 j ssT;.5 X 38 d ssT:is Z 3a 2 sT_,7 Y 41 2jssT;23 c39 3

            -~                                                                                            w         .:
                                                                                                               *i  c ssT; 3
                                                                                                    -     XSTVSAT;;ux l

i i

      ^ 4 5 3 3.                                                                                                      t u_           .

v l CL 2 i a 4?O J w 3 , i J '

        ,                                                                                                              I i

o , i , i z  : a s3: : I' a u A j Q i t. < a j k l 2:; i !\ kN N

                                                                            ' N'Q l
                                                                              'N   -

i

a a-  ;

i i I I O " a

                                              .s;.

4:3 eaa 52: OTIS TIME (MIN.) 0=1450.55 2 6 -A P R -5 4 2 A-97

u. -

PRFI T M ,,s A R Y D A T l4

PRELIMINARY DATA 240100 0 SMUD/FPC GAS TEST g c33 0 DtOT193 INDEX VTAB w s u na. w.a.4 =

• 44 2 a:.a:

w ,e av 3 m v -

                                                                                                                                     -    4 +. 4 22,.ci          _ _ _ .

X d 55: 3-47 33s7.24 O 47 ) sar;. (}c ^ 49 :  ::;.5 l i R STV5 AT a_; 1-l .

3. 3 ' Y l

4

   ,~ 4::      _                                               i v                                                                                          -
  .y
                   '                                                                                                                                                          1 1

2 L-u a 4:: : w

• h

   =              ,
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   =       .
                 ,i
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                                                                         ..4
   .n
       ;:: : _t i

fed 9 s t

                                                                                     \ cw M,
                                                                                +
                                                                               .f                  ,
                                                                                               \1' a:: :-                                                                                                                                              -

i t:3 i 432 03: i c ' :- .::: h 0iIS TIME (MIN.) 0.=i450 55 2 6 - A 0 0. -6 4

A-98 DDR t T h .A . ,, .A DV hATA

f if o PRELIMINARY DATA  : GAS TEST  !

          $0100. OLSMUD/FPC
    ' ~                ~

PLOT 194 h 600:0 , t- INDEX VTAB -

' hn% - A + 20. I surcai ~

                                     " V ', v F V          VV""                                                                                                                Z    3,; gg lJ V

X 38. 2 surcos 5 5 0. a_.  ! p, - 3 o sac _a L 1 .- ~ 45 0 3_. u

                                                                                              \.      .

l' i i:r- -u_. ,

                                                                                                 \                                          i a                                                                                 \

. - ,. . .l. i

                 <       4:3.- 2                                                     -'

7 w ig

          ,u                                                                             -                -

7 i.

.- .. g i - p I~  ! C -U. z. .. I \

'o asa:3_  ; )? ..

O y

't- . -w-  ; .

A i w r h -[- t l -- i 233:a

                                                                                       }~                          .h-                      :

i \' t ! , 7 [-- N- l l

                                                                                                                      \                                                                                '

[, L ! 253ra_ t

                                                                                                                          \ N-                                                             .

p . s- . i f I i- f I r-  ;

n j  !

t

• i 233'3-- i o i i i i 0, 203 s00 oaa aca ,:33 . ::

l n -0 TIS TIME (MIN.) 0=1450 55 26 -APR-5 4  ! 1: < i if A-99 l i:-_. _. _. . PPTITMin,ARY NATA -- --

PRELIMINARY DATA 240100 0 SMUD FPC GAS TEST

-: evn.

g Pt O T20 i o33 33 , INDEX iVT AB i

                                                                                                                                *SGoc!I!=to/c                                        '

XON-NJZ si; X a^ <uc e._ t.- r . .- 5 25. n_ o c, ;4 t . 3_-- T T i x =2: :: 1 l

i e i N f i

is 22 w

r l 3

       .+
         ~

2 a zi: :L _ m  ; s .< K n  ! a < l C </ n:

                                                                                  ;^
                                                                                                                 -(                ,
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j g  ; < < ,- v , 'g U ' X X ~i < [/

      <                \                                                    x.

X /

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C . , . . -l

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ze: D- i

             ;$2 23-                                                                                                         ;
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                       -5 . ]                       5 :                           .5  ;         c: 2        J: :             41 -

E L EVAT ION (ri 0=SGL750r j

 !                                                                                         A-100 DOCi T A ,, . , , , , \ p v   NATA

r , _ c5 4 3

                               >.C,              3                                                               'g      <*
                                                                                                          .: f                                                                                                                                                                                      l p

i#& -

                                              ~
                                                                                                             ,a1                          - PRE L IMIN ARY: .D AT A~
                                                                                                                                                                                                                                                                                                 .i l

4 r > ~ 3 s_.2(0300'd;SM$D F P.C IG A SD T'E ST T= 710. 0 MIN, f

                                                                                                                                            -                                    .                                                                                        PLOT 202 933.3 t

, INDEX VTAB l w ":,47c-z J ,.. ,/^ > *SGDRI o,To/r:

g .,l' ~ XON-NOZ sT:

                                                   . 3 j,.y                                                 @j X SG SEC                 =r:

0SECSAT  %:o.

        -. mil' '                                                                                                     <
           \

t

                             .-t
                                                                                                         '5 001

. ..j l

                                                                                                           +

-# - J. - . .. , '

tr 310!] O. 4 , 1

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p. ,

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                              -. N t:

1

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u .a a 3 4 ..; -4 H -. 3

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T.% ,T

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f

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g

 , c=./ i 1-'                          -

L 1:i w. y ( t 7 u: '

,, :4

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x 4

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D ]$ * : ' 2 z t Y x X f t , c !.L'

                             . C :-                                                                                                                                                                X
                              ~[ y -                                                                                            _
                              .L2                                                                                                                                                                                                         X i
                               " ' . 2 73 ;2
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<g2 s a1 X X < i i + . e -e. *

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6 $-. . .  : e O. 0 O j .g ,

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s y ,i

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X i p , ,

5 -

X  ; TX f y ' p . s.s.:s I i- 1 I l 6

A j -; 3IJ $. 0 $'

6 5. ] 25 3 .55. 3 45 3 5: :

                                                                           -f4   '

ELEVATION (FT 0=SGLTSUF)

W . A-101 iz-- . ..

>:. M P.P F l: T M , ,,, a P V DATA

   ,                    . . ._2,-                        , 2. , _

P PRELIMINARY DATA 240100 0 SMUD FPC GAS TEST

                                                                                                                                                                   .=s    -v:s.

g PLOT 331 530 00 INDEx 'v i A S

• RV r

Ac.:

ML :Au:0 v 3Go ;4,;; 555 an X r-m_: l

                                                                        +   +                                                                                               t        s_-r  .-

N v .n

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                                                                                                                                                                            .4
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       ,q-l Lk, l

u- - lI o e/ e o s

                                                                                                                                                                    , " i :; .' ~?

j. - i-;

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u_- ' ' _ n x om , i 1 i ,

         ,,                           ,-                                                                              '!               ',5 z                              '                                                                               i  !                                                  l s

a m .. -.-

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i  ; w  : \

f. 1, J .

n i t 4

                            - ..i                      \                                                                  ;                                                   ,

z. , e-- -- m , 1 < ,  ! l I 2 i  ! , u l ' C i , c i i us ::a I j l i

                                                                                                                            !                                                   l I
                                                                                                                            '                                                   i
                                                                                 ,                                          l u . -  .-                                               ,

i I i i i ,

                                     -4 : ;         -z : ;                         3 :              .: ;                 .    . .                    c.      ,

E L E v~ A T IO N (FT REL 5G L T 5 u'F )

  -3                                                                                          A-102 DOEi Tu,                inDv              NATA

l PRELIMINARY DATA  ; i 0 SMUD/FPC GAS TEST  ! (V'T0100 t-712 avis. PLOT 302 33]. ] INDEX lVTAB

• Rv ' cat:0 .

Z HL ;A.00 o SGP Au;3 323 J_ R ;tS ' s..:. y v - r vLv . A . ., o A D C, ;A_;; x X (,j T; ,t;; [ , O ( -) 7; .A.;; u l z w j i 1 2  !  ! a:] ]_ .!

                                                   *p2:                    2             2 1

y

                                                                                                                      .. u 3 pe         -

2

       "                                               i i_                                                                                                          4
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v I x f l

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s J: i  ! C  ! n j ' 1  ; c_ r i

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c. - _7: :- ,

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2

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       -                                                                                      I t            >

j \ . I 26 : ]_ g l i, 1 i e O i / e/ i h Q 52 : l

                                                      '                      '                                               i i

_43 3 -20 ] a] 23 3 43 3 c- - ELEVATION (FT REL. 5GLT5dr) l 's A-103 DDci Ta, ,,,\ C 'v "*~A

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