ML19290C663
| ML19290C663 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/30/1979 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML19290C651 | List: |
| References | |
| PROC-791230, NUDOCS 8001220548 | |
| Download: ML19290C663 (30) | |
Text
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SPECIAL TEST NO. 9A FORCED CIRCULATION COOLDOWN i
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SPECIAL NO. 9A 5
12/30/79 f
FORCED CIRCULATION C00LDOWN Table of Contents Page i
l 1.0 OBJECTIVES 1
2.0 PREREQUISITES 2
3.0 PRECAUTIONS 5
4.0 SPECIAL TEST EQUIPMEiT 6
50 INSTRUCTIONS T
6.0 ACCEPTANCE CRITERIA 10 DATA SHEETS 10 APPEIDIX A APPEIDIX B 13 APPEIDIX C 14 APPEIDIX D 25
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1787 117 a
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SPECIAL NO. 9A j
12/30/79 FORCED CIRCULATION COOLDOWN Test Descriptio_n This test will generate a correction factor which will be applied to the excore detector outputs in order to compensate for PV downcomer shadowing during a cooldown from ~ 550 F to
~ 450 F.
The RCS will initially be + 3% power, in forced circulation. A cooldown via steam dumps will be initiated and continue until Tavg is approximately 450 F.
During the cooldown primary side calorimetrics will be performed, movable detector integral power calculations performed, and excora detector data obtained simultaneously.
Power should be maintained as constant as possible using the results of the primary side calorimetric and integral power calculations. Data reduction will be on a continuous basis.
Af ter reaching ~ 450 F the plant will be allowed to heat up and additional data will be obtained.
Data reduction will average the cooldown and heatup data and generate an excore l
detector indicated power correction factor as a function of the average cold leg temperature.
1787 118 W
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- - - - - - ~ ~ -
1 SPEC'Ja, NO. 9A Page 1 of 9 12/30/79 1.0 OBJECTP/ES Determine an excore detector indicated power correction factor as a function of the average cold leg temperature.
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SPECIAL NO. 9A Page 2 of 9 12/30/79 2.0 PREREQUISITES 2.1 The following initial conditions exist:
2.1.1 Reactor power is at approximately 3% RTP.
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2.1.2 Forced circulation on all four' loops is established.
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2.1.3 Steam generators are being fed by the auxiliary feed water system.
Level is being maintained at approximately 33%.
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2.1.4 Steam generators are steaming via the condenser or atmospheric steam dumps.
(Preferred is to condenser for SG pressure equiliza-tion).
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2.1.5 Pressurizer pressure control in automatic and maintaining normal operating pressures.
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2.1.6 RCS temperature is approximately 550 F.
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2.1.7 Shutdown banks are fully withdrawn and control banks are at least at their insertion limit. Rod control system is in manual.
.(Preferably-alLreds-eve -out and control bank D is at ~70 steps).
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2.1.8 Pressurizer level control in AUTO and maintaining programmed water level.
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2.1.9 The RCS and Pressurizer baron concentrations are within 20 ppm.
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2.2 The reactivity computer has been checked out and flux, reactivity, Tcold (avg 4 loops), Thot (avg 4 loope) are being recorded on the strip chart recorders.
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2.3 Sufficient water is available to provide makeup for the expected cooldown to 450 F.
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1787 J20
SPECIAL NO. 9A Page 3 of 9 12/30/79 2.0 (Continued) 2.4 SI's which are necessary to perform this test have been performed (to be supplied later).
SI-41, SI-96,...
l 2.5 Set up the following test signals on brush recorders.
NOTE: Exact recorder / channel / parameter matching is not necessary.
2.5.1 Recorder No. 1 Channel Parameter Test Point Rack 1
Przr Pressure PP/455B R1 2
Przr Level LP/459B R1 3
Lp 1 H2 Temp TP/413E R2 4
Lp 2 H2 Temp TP/423E R2 5
Lp 3 H2 Temp TP/433E R2 6
Lp 4 H2 Temp TP/443E R2
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2.5.2 Recorder No. 2 s
Channel Parameter Test Point Rack 1
LP 1 CL Temp TP/413F R6 2
LP 2 CL Temp TP/423F R6 l
3 LP 3 CL Temp TP/433F R6 4
LP 4 CL Te=p TP/443F R6 5
LP 1 Flow FP/414B R1 6
LP 2 Flow FP/424B R1
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2.5.3 Recorder No. 3 Channel 7KranstE"
' ~ Test Point Rack 1
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2.5.4 Recorder No. 4 Channel Parameter Test Point Rack 1
LP 4 SC Press PP/546B R12 5
6
/ 1787 121
SPECIAL NO. 9A Page 4 of 9 12/30/79 2.0 (Continued) 2.6 Trend the following parameters on the process computer at ~ 5-minute intervals.
Wide range cold legs T0406A T0426A T0446A T0466A Wide range hot legs T0419A T0439A 5
T0459A T0479A Steam generator levels LO403A LO423A LO443A LO463A Loop Flow-F0400A F0420A F0440A F0460A
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2.7 Obtain the wide range 6 1 correction factors using Appendix D.
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i 2.8 Perform the reference (REF) portion of the primary calorimetric Appendix C' and a M/D trace simultaneously, Appendix C, Part B.
Use the output of the primary calorimetric to set the M/D Power Monitor Program.
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SPECIAL NO. 9A Page 5 of 9
12/30/79 3.0 PRECAUTIONS, LIMITATIONS, AND ACTIONS 3.1 Do not exceed 5% RTP. Caution should be used in maintaining the desired power level because of flux shadowing of the excore detectors.
Don't depend on the excore detectors. Use as many methods as possible to determine actual core power.
3.2 During the cooldown the isothemal temperature coefficient will be small but may be of either polarity. Care should be taken when changing reactivity using control rods or boron concentrr. tion because at some point the temperature cofficient polarity could change.
3.3 Maintain control bank D at ~ 160 steps if possible. This same suggested minimum limit will be used during the natural circulation test. This height vill minimize the effect of rod shadowing of the excore detectors and insure uniformity between forced and natural circulation test.
i i787 123 3
SPECIAL NO. 9A Page 5 of.9 4.0 Suecial Test Equirment 12/30/79 Identification Calibration Instrument Suecification Number Verificatier:
Reactivity Computer and Associated Equipment (4) 6-channel recorde rs (2) DVM's i
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1
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If test instru:sents are changed during this test, the instrument information must be recorded here and an entry made in the chronolo6 cal log book explainic6 1
this change.
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1787 124 6
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SPECIAL NO. 9A Page 7 of 9 12/30/79 5.0 INSTRUCTIONS NOTE: Perform SI-38, SI-48, and SI-127 periodically during the cooldown.
5.1 Cooldown 5.1.1 Verify that the CVCS will provide auto makeup.
NOTE: Depending on rod position and the magnitude,and polarity of the isothermal ter:perature coefficient dilution and/or boration may be required'.
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5.1.2 Verify that the system is in equilibrium with respect to power, RCS temperature, pressure and boron concentration.
Pressurizer pressure ~ 2235 + 50 psig S/G pressure
~ 1005 psig RCS-PRZR boron concentration within 20 ppm Successive boron concentration within 10 ppm Reactivity is approximately zero and constant
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5.1.3 Start the test recorders on slow speed (5mm/ min). Record on the charts, the date, time, recorder ID, parameters measured, measurement range, test being performed and name of person recording data.
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5.1.4 Start process computer trend block.
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5.1.5 Obtain a ther.noccuple map, per Appendi:; C, Part C, and repeat every 10 F during cooldown.
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5.1.6 Record excore detector data on Data Sheet 1 and repeat every 10 F.
One of the P.R. channels is disconr.ected so record the Keithley amplifier output for that particular channel on Data Sheet 1.
NOTE: Mark out "N-
" and write in "KA."
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5.1.7 Initiate the program for obtaining M/D trace data and record on Data Sheet 2.
Repeat every 10 F during cooldown. Use applicable portions of Appendix C.
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1787 125 Se <
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SPECIAL NO. 9A Page 8 of 9 12/30/79 5.0 5.1 (Continued) 5.1.8 Initiate the primary side calorimetric and repeat every 10 F.
Use applicable portions of Appendix C.
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5.1.9 Initiate a cooldown by slowlg increasing the rate of stexm dump and The rate proceed to approximately 450 F core inlet temperature.
should be approximately 30 F per hour. Whe.n Tavg is reduced to 540 F bypass the steam dump interlocks.
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5.1.10 Use the control rods and soluable boron as necessary to maintain core power approximately constant. Core power is determined by the primary side calorimetric and the M/D trace data. Refer to Appendix C, Parts A and B.
NOTE: Control bank D should be maintained at approximately 160 steps if possible.
i 5.1.11 Upon reaching approximately 450 F terminate the cooldown and allow the RCS to come to an equilibrium condition. Continue to obtain data.
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5.2 Heatup 5.2.1 Allow the RCS to heatup at the same rate indicated above. Obtain the same data at tha same temperature plateaus.
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5.2.2 Upon reaching approximate'.y 550 F terminate the heatup and allow the RCS tem.come,,to-e n quilibrium condition. Af ter one sur of data has been obtained at 550 F the test is over. Attach ALL data to this test.
5.3 Data Reduction NOTE: This reduction must be performed and an excore detector indicated power correction factor as a function of temperature determined before proceeding to the NC cooldown portion of this test.
5.3.1 Use both the cooldown and heatup data.
If for some reason the data was not obtained at exactly the required temperature plateaus mark through that temperature and record the actual measurement temperature.
Excore Data: Sum the top and bottom currents for the 3 channels in (Data Sheet 1)scrvice and enter under sum.
The Keithley amp output should be in sum column. Transfer the data to the Calculation Sheet.
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1787 126 e -
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SPECIAL NO. 9A Pase 9 of 9 12/30/79 t
i 50 5.3 531 (Continued)
I Transfer the calculated power level to the Calculation M/D Data:
l (Data Sheet 2) Sheet.
Primary Calor. : Transfer the power level obtained from the prirary j
( Appendix C) calorimetric to the Calculation Sheet.
l Average Power: Using the incore data and pri=ary calorimetric data (Calculation determine the actual core power at each temperature Sheet) plateau. A straight average should be used unless one i
method or the other proves unreliable.
t Power Normalization: Divide the average power obtained at each l
to REF Average Power temperature plateau by,the average power I
(Calculation Sheet) obtained at the reference (REF) condition, 550 F.
This factor vill in turn be used to correct the excore outputs.
Power Corrected:
Divide the measured excore detector currents br Excore Currents & the power normalization factor. This in effect Keithley Ann Output _ corrects all data for flucuations in core power.
The resulting currents then vill only be a function of the cold leg temperature.
Excore Current:
Divide the power corrected excore currents obtained Multiplier as a at each temperature plateau into the excore current Function of Cold obtained at the REF condition. NOTE: the factors Leg Teaterature:
should increase as T decreases. Plot the correction factors as a function of T for each The plots will be used in Ehe natural detector.
circulation cooldown phase of this test.
n,.,--
-9 1787 127
i SPECIAL NO. 9A i
Page 1 of fl 12/30/79 DATA SHEET 1 EXCORE DATA SHEET Hap No.
Shutdown Bank Position:
A B
C D
E Date Control Bank Position:
A B
C D
E i
Power RCCA Position N-41 N-42 N-43 N-44 l
Tima/ Temp Top Bottom Sum Top Bottom Sum Top Bottom Sum Top Bottom Sum
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t Data Taken By:
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SPECIAL NO. 9A Page 1 of 1 12/30/79 i
CAT rift ATTON 9tivvT APPROXIMATE AVERAGE COLD LEG TEMPERATURES ( F)
REF.
Item #
Parameters 550 540 530 520 510 500 8: /U 480 470 460 450 Movable Detector 1
(% RTP)
Primary Calorimetric 2
(% RTP)
Average Power 3
(% RTP)
Power Normalization 4
to REF condition 1.00 Excore Currents N-5 and N-Keithley Amp N-Output KA Power Corrected N-Excore Currents N-3 6
Keithly Amp N-Output KA N-1.00 7
Corrections N-1.00 Factors N-1.00 KA 1.00 Remarks:
i C.alculated,by Reviewed by: 1787 130
- - -- - - - g-yo,y,g, Appendix B 2/6/79 Page of Rev.
Page of Test Deficiencies #
Test Deficiency Recommended Resolution
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Final Resolution Originator
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Signature Date PORC Review of Final Resolution Date
)f hf- } 3l Approval of Final Resolution
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Plant Superintendent Date --
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SPECIAL NO. 9A Page 1 of 11 12/30/79 APPENDIX C Outline I.
Core Power Determination A.
Primary Side Calorimetric (Forced Circulation Only) 1.
Reference (* 550 F) Calorimetric (Before NC test) a) Output used to adjust M/D Power, Monitor Program's power conversion constant.
2.
Non-reference Temperature Calorimetric (Cooldown) a) Output used at every temperature plateau as a continuous core power monitoring Leheme.
b) Output is used in conjunction with the ouput of the M/D Power Monitor Program to assign a best estimate core power at each temperature plateau. The powers are used to normalize'the excore detector outputs which in turn are plotted as a function of the core inlet temperature.
B.
M/D Power Monitor Program 1.
Power Conversion Constant Adjustment.
a) The output of the REF primary calorimetric will give a
% power output; this output must be input to the M/D Power-Monitor Program so that the program output will be in percent power and equal to the primary calorimetric output.
2.
Power Monitoring a) The M/D Power Monitor. Program will calculate the integral power as seen by one pass of 5 or 6 detectors. Af ter the output haLbeen calibrstedVWequaTId'thi FIF primary calorimetric it will be
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rerun up to once every 2 minutes or as necessary to continuously monitor core power.
1787
!32
SPECIAL NO. 9A Page 2 of 11 12/30/79 l
APPENDIX C CORE POWER DETERMINATION PART A: Primary side calorimetric - Data Sheet C.1 (Forced Circulation)
C.1 Use two DVMs and measure the voltage at the test points specified for each loop as rapid as possible.
C.2 Calculate the A T; multiply tha't' A T by the specific heat and the Westinghouse best estimate flow rate of the core average temperature (Table C-1).
(Special Test No. 9 uses vide range 4 T so a correction factor is required to compensate for pu=p heating, refer to Appendix D of ST-9A).
C.3 Sum the loop heat rates and convert to a percent reactor power. The output is used in Part B and on the Calculation Sheet.
__ =
1787 133 __
SPECIAL NO. 9A Page 3 of 11 12/30/79 APPENDIX C (Continued)
Core Power Determination PART B: M/D Power Monitor Program 1.
Set up the movable detector system for a 1 pass partial core flux map as per TI-53.
Select flux thimbles as per the table below for the flux map.
Drive 10-Path Position Core Location A
B C
D E
F These positions may be altered by the test engineer, based upon low-power physics testing results and previous special testing experience.
2.
Determine the detector normalization constants and enter them into the P-250 as follows:
Enter a value of 1.0 into the P 250 for the addresses shown in 1
a) the table below.
b) With all 5-path selector switches set to normal, run a flux trace.
c) With all 5-path selector switches set to Emergency, run a second flux trace.
d) Determine the detector normalization constants from Data Sheet C.2.
e) Enter these detector normalization constants into the P-250 as shown in the table below.
Drive P-250 Address A
K0908 B
K0909 C
K0910
- D K0911 E
K0912 F
K0913 17BL7 134 SPECIAL NO. 9A Page 4 of 11 12/30/79 APPENDIX C (Continued)
Core Power Determination PART B:
(Continued) 3.
Verify that the P-250 parameters listed in the following table have the proper value and that the P-250 time and date are current.
Update as required.
Address Value Function K0901 1
Set the power normalization factor Selects the modified K5525 1
" Flux Map Print" programs K0900 0
Initiated Pass Number
. Calibration Constant for M/D Variable (1 Power Monitor K0864 (1) Variable: The value entered is a ratio of the Primary Calorimetric Indicated Power (Item 8 on Data Sheet C.1) to the M/D calculated power (UO906) times the current value entered in (K0864). If no value has been entered into (K0864) enter 0.25.
Item #8 Data Sheet C.1 New (K0864) = Current (K0864) x (UO906) i 4.
For power determination, obtain a partial core flux map as per TI-53.
The M/D's need not be withdrawn between passes, and passes may be repeated as of ten as a power determination is required.
NOTE: The calculated power (UO906) is printed af ter each pass and may be trended by the P-250 if desired. The individual detector normalized integrals are also printed.
9 1787 135 m.
,eee m-49 M**
SPECIAL NO. 9A Page 5 of 11 12/30/79 APPENDIX C PRIMARY SIDE CALORIMETRIC DATA SHEET C.1 Loop 1
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8 L P LOOPIl0V LoopRxPwr RCS Temp R2/IP-41 R6/TP-41
- 2-#3
- 4+c.f.(2)
- 5xCp(3)
Approx.
HL CL T
4)
- g x #7 F
Volts F Volts F
F F
Btu /lb 10 lb/hr 10 Btu /hr 550(REF) 540 530 520 510 500 490 480 470 460 450 460 470 480 490 500 510 520 530 540 550
)From appropriate scaling document.
(3)From Appendix D.
Remarks:
(4)Cp from Table C-1 6 from Table C-1 Data by:
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Checked by:
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SPECIAL NO. 9A Page 6 of 11 I
12/30/79 APPENDLX C PRIMARY SIDE CALORIMETRIC (CONTINUEDj DATA SHEET C.1 Loop 2
- 9
- 10
- 11
- 12
.#13
- 14
- 15
- 16 Approx.
EL CL T
L 2 k3) L pFlow LoopRxPwr RCSfemp R2/TP-42]} R6/TP-42g}
110-#11
- 12+c. f. (2)
- 13xCp f4)
- g4x#15 F
Volts F Volts F F
F Beu/lb 10 lb/hr 10 Beu/hr i
550(REF) 540 530 520 510 500 490 480 470 460 450 460 470 480 e
490 1
500 5,1,0, r 520 530 540 550 Remarks:
i Data by:
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Checked by:
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, 1787 137
I SPECIAL NO. 9A Page 7 of 11, I
12/30/79 j
APPENDIX C PRIMARY SIDE CALORIMETRIC (CONTINUED)
DATA SHEET C.1 Loop 3
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24 L PFlow LoopRxPwr Approx.
EL CL T
Loop k3)
- 20+c.f.
- 21xCp f4)
- g3x#24 RCS Temp R2/TP-43(() R6/TP-43(()//18-#19 F
Volts F Volts F F
F Beu/lb 10 lb/hr 10 Btu /hr 550(REF) 540 530 520 510 500 490 480 470 1
460 450 460 r 470_
480 490 i
500 510 r
520 530 y
540 550 Remarks:
Data hy:
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r Checked by:
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0 1787 138
- ~ - - - - - - -
SPECIAL.NO. ?A Page 8 of 11 12/30/79 APPENDIX C PRIMARY SIDE CALORIMETRIC (CONTINUED)
DATA SHEET C.1 Loop 4
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32 Loop LoopFlow LoopRxPwr
- 28ge.f.g
- 29xCp{3) f4)
- g0x#31 Approx.
HL CL T
RCS Temp R2/TP-g4(() R6/TP-g4(() #26-#27 F
Volts F Volts F F
F Btu /lb 10 lb/hr 10 Beu/hr SSU(REF) 540 530 520 510 500 490 480 470 460 450
(
460 470 480 490 l
500 510 520 530 540 550 Remarks:
Data by:
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Checked by:
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1787 139
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SPECIAL NO. 9A Page 9 of 11 12/30/79 APPENDIX C PRIMARY SIDE CALORIMETRIC (CONTINUED)
DATA SHEET C.1 Total
- 33
- 34
- 35
- 36 Approx.
Total Reactor Power Reactor Power
% Reactor Power RCS Temp.
- 8+g16+#24+#32
- 34 x 0.29307
- 35 x 0.02932' F
10 Btu /hr MWt 550(REF) 540 530 520 510 500 i
490 t
480 470 460 450 460 470 480 490 i
500 510 520 530 540 550 Remarks:
Data by:
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Checked by:
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. 1787 140'
SPECIAL NO. 4A
age '10 of 11 12/30/79 APPENDIX C PRIMARY SIDE CALORIMETRIC (CONTINUED)
Table C-1 Temp.
Cn( )
m F
Btu'/ih. F
- m/hr 7
560 1.270 3.6239 x 10 7
550(REF) 1.246 3.6765 x 10 7
540 1.221 3.7254 x 10 7
530 1.202 3.7729 x 10 7
520 1.183 3.8179 x 10 7
510 1.168 3.8621 x 10 7
500 1.152 3.904 x 10 490 1.140 3.9436 x 10 480 1.127 3.9837 x 10 470 1.117 4,0215 x 10 7
460 1.107 4.0589 x 10 7
450 L.098 4.0949 x 10 7
440 1.089 4.1294 x 10
(
These values are from the 1967 ASME Steam Tables. Values are for a pressure of 2250 psia.
1787 141
-23_
SPECIAL NO. 9A Page 11 of 11 12/30/79 APPENDIX C (Continued)
E, -
r-D C
B g-y y
y y
r-E D
i, -
B,.
C 3
3 g
s N = 1.00 A
N%
N N
i 0
B B
N N
B N.. = b BE
=
=
[N CN N
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D" D
N N
o "D E
.AN N
g i
s N
u, "E g E
I Yu N
Definitions:
Nomli=ed integral from summary map for each A,B'
=
g N
N' N'
N' N
detector in a normal path in the first pass Normalized integral from su= mary map for each E, D. E, FE A,B'
=
E E
g E
detector in an emergency path in the second pass N, N ' "C' D'
E' F
A B
Remarks:
Data By:
Date 1787 142
SPECIAL NO. 9A Page 1 of 3 12/30/79 APPENDIX D WIDE RANGE A T CORRECTION D.1 Use two D'Al's and measure the voltage at the test points specified for each loop as rapidly as possible.
D.2 Use the appropriate scaling to convert the DV voltages to F.
D.3 The correction factor (c.f.) determined in item 5 is used'on Data Sbeet C.1 to correct the calculated wide range 6 T for the A T across the core generated by the Reactor Coolant Pumps.
1787 143.
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SPECIAL NO. 9A Page 2 of 3 12/30/79 APPENDIX D (CONTINUED)
WIDE RANGE a T CORRECTION LOOP 1 Ites Parameter Location Reading Parameter No.
Rack / Test Point Volts F
LOOP 1 (1) 1 Hot Leg R2/TP-413E LOOP 1 (1) 2 Cold Leg R6/TP-413F Loop 1 3
W.R. 6 T Item 1-Item 2 Loop 1 (1) 4 N.R. d T R2/TP-411G W.R. 6T 5
CorrectionFactor Item 4-Item 3 c.f.=
LOOP 2 LOOP 2 (1) 1 Hot Leg R2/TP-423E Loop 2 (y) 2 Cold Leg R6/TP-423F Loop 2 3
W.R. 6 T Item 1-Item 2 LOOP 2 (1) 4 N.R. 6 T R6/TP-421G W.R. 6 T 5
CorrectionFactor Item 4-Item 3 c.f.=
(1) Scaling Document.
I787 144 _._
g eem e hwm W
SPECIAL NO. 9A Page 3 of 3 12/30/79 APPENDIX D (CONTLNUED)
WIDE RANGE a T CORRECTION LOOP 3 Item Parameter Location Reading Parameter No.
Rack / Test Point Volts F
Loop 3
(
1 Hot Leg R2/TP-433E Loop 3 (1) 2 Cold Leg R6/TP-433F Loop 3 3
W.R. 6 T Item 1-Item 2 Loop 3
()
4 N. R. 6. T R10/TP-431G W.R. o T 5
CorrectionFactor Item 4-Item 3 c.f.=
LOOP 4 Loop 4
(
1 Hot Leg R2/TP-443E Loop 4
)
2 Cold Leg R6/TP-443F Loop 4 3
W.R. A T Item 1-Item 2 Loop 4 1) 4 N.R. 6 T R13/TP-441C W.R. o "I 5
CorrectionFactor Item 4-Item 3 c.f.=
(
Scaling Document.
/
1787 145.-
-