ML19290C660
| ML19290C660 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/14/1979 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML19290C651 | List: |
| References | |
| PROC-791214-01, NUDOCS 8001220517 | |
| Download: ML19290C660 (25) | |
Text
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1 SPECIAL NO. 6 C00LDOWN CAPABILITY OF THE CHARGING AND LETDOW 4
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SPECIAL NO. 6 12/14/79 i.
C00LDOWN CAPABILITY OF THE CHARGING AND LETDOWN Table of Contents Page ,
1.0 OBJECTIVES 1 2.0 PREREQUISITES 1 3.0 PRECAUTIONS 2 4.0 SPECIAL TEST EQUIPME!TI 3
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5.0 INSTRUCTIONS 4 6.0 ACCEPTANCE CRITERIA 5 APPENDIX A - References n
APPENDIX B - Deficiencies '
APPENDIX C - Power Measurement Technique lC t
i APPENDIX D - Computer Points .
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. SPECIAL NO. 6 Page 1 of 5 12/14/79 1.0 OBJECTIVES The objective of this test is to determine the capability of the charging and letdown system tc cooldown the reactor coolant system with the steam generators isolated and one reactor coolant pump in operation.
2.0 PREREQUISITES ,,
2.1 The reactor is shutdown and borated to ensure adequate shutdown margin.
(Mode 2).
. Date 2.2 All four reactor coolant pumps are in operation.
Date 2.3 Steam generator level being maintained at appro.timately 33% with the auxiliary feedwater system.
Date 2.4 Reactor coolant system pressure and level under automatic control at approximately 2235 psig and 25% level.
? Date 2.5 Reactor coolant system temperature being controlled at approximately 545 F by steam du=p to the condenser under automatic pressure control.
(Steam generator pressure at 1005 psig).
^
s Date 6 Steam generator chemistry is within normal guidelines such that steam generator blowdown can be isolated when the steam generators are isolated.
Date 2.7 Set up one of the source range channels on NR-45 to monitor any changes in the core flux level.
- a Date 2.8 Normal charging and letdown in service and under automatic control.
. . = - . =..
Date ,
_1_ 1787 028.
O f LL LAL DU . O Page 2 of 5 2.0 (Continued) 12/14/79 2.9 Conna.ct Brush cecorders to the following test points in the auxiliary instrument room. .
Brush Recorder 1 Connect To: Monitoring:
Channel No. 1 1-R-23, TP130 Letdown HTX Outlet Temp.
Channel No. 2 1-R-19, TP127 Reg. HTX Outlet Channel No. 3 1-R-15 TP126 Charging Tem.
Channel No. 4 1-R-1, PP455B Pressurizer Pressure -
Channel No. 5 1-R-1, LP459B Pressurizer Level Brush Recorder 2 Connect To: Monitoring:
Channel No.1 1-R-18, FP121A RCS Charging Flow Channel No. 2 1-R-23, FP132 RCS Letdown Flow Channel No. 3 1-R-2, TP413E Loop 1 Hot Leg Temperature Channel No. 4 1-R-6. TP413F Loop 1 Cold Leg Temperature Channel No. 5 1-R-2, TP423E Loop 2 Hot Leg Temperature Channel No. 6 1-R-6, TP423F Loop 2 Hot Leg Temperature Brush Recorder 3 Connect To:, Monitoring:
Channel No.1 1-R-2 TP433E Loop 3 Hot Leg Channel No. 2 1-R-6, TP433F Loop 3 Cold Leg Channel No. 3 1-R-2, TP443E Loop 4 Hot Leg Channel No. 4 1-R-6, TP443F Loop 4 Cold Leg i
NOTE: Record the following on each recorder chart.
a4 Unit number b) 'Date c) Procedere number d) Parameter scale and range e) Chart speed f) Name of person recording data g) Recorder ID number 2.10 Setup the P-250 computer trend printer to monitor the parameters indicated in Appendix D.
-/ -
3.0 PRECAUTIONS 3.1 Corore beginning, and while the test is conducted, verify adequate shutdown margin by rod and boron worth calculations.
3.2 The boron concentration in the pressurizer should not be less than the concentration in the reactor coolant loops by more than 50 ppm. Use pressurizer spray to equel.izejconceneration.
3.3 One source range channel sha?.1 be in operation and monitored continuously on NR-45 during the condact of this test.
= - -
3.4 Charging flow to the RCS must be at the same boron concentration- as ~that--
required for shutdown.
3.5 The RCS should be sampled for boron concentration once toward the end of the 30-minute perica of maximum letdown and charsing and shutdown margin verified.
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SPECIAL NO. 6 Page 3 of 5 h.0 Special Test Equiment 12/14/79 Identification Calibration Instrument Specification Nu=ber Verification Strip Chart Recorder Brush 260 or equivalent (3) ..
Reactivity Computer Westinghouse i
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i If test instru=ents are changed during this t,est, the instrument informatio.n must be recorced here and an entry made in the chronological log book explaining -
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1 787 030
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- SPECIAL NO. 6 Page 4 of 5 12/14/79 5.0 TEST INSTRUCTIONS 5.1 If the reactor :olant system Tavg is above 545 F, reduce it by .
manually incre. sing steam dump to the condenser.
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5.1.1 Start the recorders iu the auxiliary instrument room at 25 mm/ min, and trend printer.
5.2 Shutdown reactor coolant pumps 1, 3, and 4 in accordance with SOI 68.2.
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5.3 Isolate all four steam generators by closing main steam isolation valves 1-FCV, 1-4, 11, 22, and 29.
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5.4 Isolate steam generator blowdown if it is presently in operation by closing FCV-15-12 from the controller located next to the flash tank.
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5.5 Allow the RCS Tavg to increase to approximately 547 F and then increase charging flow and letdown to the maximum allowable.
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5.6 Continue maximum letdown and charging for a 30-minute period and then reduce letdown and charging to the minimum allowable. Continue recording d.ata.
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NOTE: Ioward the end of the 30-minute period a boren analysis of the RCS should be done to verify adequate shutdown margin.
5.7 After running with minimum letdown and charging for a 30-minute period, stop the recorders and attach the charts to Data Sheet 5.1.
5.8 Stop trend printer and recorder.
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5.9 Open MSIV bypass valves and then the MSIV's when the steam generator pressure and steam header pressure are approximately equal.
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5.10 Startreactorcoolanthumps'1,3,and4inaccordancewithSOI68.2.
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5.11 OnDataSheet5.2,usingrecordeddata,calculateth'eaverak5"rateof te=perature change for the 30-minute periods of maximum and minimum letdown and charging.
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] Page 5 of 5 12/14/79
. 1 6.0 MCEPTANCE CRITERIA ,
6.1 Core exit T/C temperature did not exceed 610 F.
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6.2 Delta-T for any loop did not exceed 65 F.'
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6.3 Tavg for any loop does not exceed 578 F.
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- SPECIAL NO. 6 l Page 1 of 1 12/14/79 DATA SHEET 5.1
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Attach the recorder cnarts and computer printouts to this page.
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l'/14/79 DATA SHEET 5.2 q
e }J Maximum Letdown and Charging Charging Flow gpm Letdown Flow gym ,
Average Temperature Change F
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\ s Charging Flow gpm Letdown Flow spm Average Temperature Change F t
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. SPECIAL NO. 6
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'd Page 1 of 1 12/14/79
- APPENDIX A
, ,, References t
i 1. FSAR .
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- 2. Technical Specifications -
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,a 3. Plant Operating Instruction SOI 68.2 1,
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Page of Test Deficiencies #
Test Deficieney_ .
Recorrended _ Resolution i
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s Final Resolution _
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Signature Date - - -
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PORC Review of Final Resolution Date i787 036 -
Approval of Final Resolution / -
Plant Superintendent Date
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SPECIAL NO. 6 1 v 1 ef 10 l' 9/79 APPENDIX C Punchlist:
- 1. Part C - Ther=ocouples
- 2. Part B - Address in P-250 for:
- a. Priority scan option selection
- b. Power calibration constant
- c. Calculated power I
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. SPECIAL NO. 6 Page 2 of 10 12/30/79 APPENDIX C (Continued)
Outline I. Coze "7 *r Datery%at. )n A. ~r cle.*
- Side Calorimetric (Forced Circulation Only)
- 1. Reference ( M50 F) Calorimetric (Before NC test) a) Output used to adjust M/D Power Monitor Program's power conversion constant.
B. M/D Power Monitor Program
- 1. Power Conversion Constant Adjustment.
a) The output of the REF primary calorimetric vill give a -5 power output; this output must be input to the M/D Power-Monitor Program so that the program output vill be in percent power and equal to the prinary calorimetric output.
- 2. Power Monitoring a) The M/D Power Monitor Program vill calculate the integral power as seen by one pass of 5 or 6 detectors. After the output has been calibrated to be equal to the REF pri=ary calorimetric it vill be l'
rerun up to once every 2 minutes or as necessary to continuously monitor core power.
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SPECIAL NO. t3 Page 3 of 10 12/30/79 APPENDIX C CORE POWER DETEPMINATION 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 that 4 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 A T so a correction factor is required to compensate for pump 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.
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SPECIAL NO. 6 Page 4 of 10 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 I
These positions may be altered by the test engineer, based upon low-yower physics testing results and previous special testing
, experAence.
I j 2. . Determine the detector normalization constants and enter them into the P-250 as follows:
a) Enter a value of 1.0 into the P-250 for the addresses shown- in
.: 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 Shee.: C.2.
e) Eater these detector normalization constants into the P-250 as shown in the table below.
Drive P-250 Addrees A K0908 B K0909 ,
C K0910
- 17B7 040 D K0911
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E K0912
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F K0913
SPECIAL NO. 6 Page 5 of 10 12/30/79 AP'~ SN C (Continued)
Core rever Determination PART B: (Continued) 3 Verify that the P-250 pcraseters 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 never normalization factor Selects the modified K5525 1 " Flux Map Print" programs K0900 0 Initiated Pass Number Calibration Constant for M/D K086h Variable Power Monitor (1} Variable: The value entered is a ratio of the Primary Calorimetric Indicated Power (Item B on Data Sheet C.1) to the M/D calculated power (UO906) times the current value entered in (K086k). If no value has been entered into (K086h) enter 0 25 Item #8 Data Sheet C.1 New (K0864) = Current (K0864) x (UO906)
- 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 often as a power determination is required.
NOIE: The calculated power (UO906) is printed after each pass and may be trended by the P-250 if desired. The individual detector normalized integrals are also printed.
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SPECIAL NO. 6 Page 6 of 1Q-12/30/79 APPENDIX C (Continued)
TABLE C-1 femp Cp(1) m F BTU /lbm F lbm/hr 556 1.260 3.6448 x 10 7 554 1.255 3.6553 x 10 7 552 1.250 3.6659 x 10 550 1.245 3.6765 x 10 7 548 1,.240 3.6862 x 10 7 546 1.236 3.6959 x 10 7 544 1.231 3.7057 x 10 542 1.226 3.7155 x 10 540 1.221 3.7254 x 10 538 1.217 3.7348 x 10 7 536 1.213 3.7443 x 10
. 534 1.209 3.7538 x 10 7 v 532 1.206 3.7633 x 10 7 530 1.202 3.7729 x 10 s
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These values are from the 1967 ASME Steam Tables. Values are for a pressure of 2250 psia.
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. SPECIAL NO. 6 Page 8 of 10 12/30/79 APPENDIX C (Continued)
A = * ~
B b" N" N" N N N A, = B, = g= D, = g, = r, = .
N = 1.00 A
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B B N N N " "
C " hl %
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F N N Definitions:
s m ze n egra fr s m ry u p for each AN ' BN ' b' N' N' N
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detector in a normal path in the first pass A'B,g,D' E E F, FE = Normalized integral from summary map for each E
detector in an emergency path in the second pass N N' ~ ** # * ** " # # ** * ** #
A B C' D' E' F Remarks:
Data By: Date
SPECIAL NO. 6 P ye 9 of l0 12/30/79 APPENDIX C (Continued)
Part C: Using Thermocouples The incere ther=occuples can be used as an indication of both core flow distribution and power shifts during natural circulation.
Prior to running a thermocouple map or trending the eight quadrant tilts -
(four center line and four diagonal tilts) the following should be verified:
KOT01-K0765 = 1, For the flow mixing factors K5501 = 0, Indicates the measured core A T is unreliable K0791 = 0.075, Core bypass flow fraction l
K5010 = 8. Tells thermocouple program how many readings of ther=occuples are required for averaging before calculation is done. This in turn sets the running frequency of the Thermcouple Averaging Program at 1, 2, . . . . X 6 seconds or 64 seconds for us.
The ther= couple programs breaks the core down into eight quadrants-four l- centerline and four diagonal quadrants (see Figure C-1). Quadrants 1-4 can be directly correlated with the excore detectors but quadrants 5-8 cannot.
t i The quadrant tilts are indicative of power shifts and should be trended at approximately a 2-minute frequency. The following addressable values are the quadrant tilts:
' Quadrant Addressable Value 1 U1159 U1160
- 2 U1161 3
- 4 U1162 5 U1151
' 6 U1152 7 U1153 8 U1154 A Short Form Map should be run periodically or upon request from the test engineer as an indication of core flow distribution. It should be put on the Utility Typewriter if possible. The P-250 Operator's Console Reference Manual provides instructions for obtaining thermocouple maps.
.The trend output and Short Form Maps should be attached to this procedure at the end of the test.
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SPECIAL NO. 6 Page 1 of 4 12/15/79 APPENDIX D Procedure For Use Of Computsr System For Data Collection The following parameters will be monitored during this test using the plant computer system. ,
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Parameter Computer Point Pressurizer Pressure PO480A Pressurizer Level LO480A RCS Loop 1 Hot Leg Temperature T0419A RCS Loop 1 Cold Leg Temperature T0406A, RCS Loop 2 Hot Leg Temperature T0439A RCS Loop 2 Cold Leg Temperature T0426A RCS Loop 3 Hot Leg Temperature T0459A RCS Loop 3 Cold Leg Temperature T0446A RCS Loop 4 Hot Leg Temperature T0479A RCS Loop 4 Cold Leg Temperature T0466A Steam Generator'1 Pressure PO400A Steam Generator 1 Narrow Range Level LO400A v
Steam Generator 2 Pressure PO420A
- Steam Generator 2 Narrow Range Level LO420A Steam Generator 3 Pressure PO440A Steam Generator 3 Narrow Range Level LO440A Steam Generator 4 Pressure PO460A Steam Generator 4 Narrow Range Level LO460A Power Range Cha el 1 (Quadrant 4) N0049A Power Range Channel 2 (Quadrant 2) N0050A Power Range Channel 3 (Quadrant 1) N0051A 787 047 Power Range Channel 4 (Quadrant 3) N0052A Incore Thermocouples , T0001A through T0065A s
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SPECIAL NO. 6 Page 2 of 4 12/15/79 APPENDIX D (Continued)
The computer trend typewriter will be used to monitor the following computer points.
(Additional points may be added as required by the test director).
BLOCK 1
~
Column Point Column Point
- Column Point PO480A 7 T0459A 13 P0420A l
LO480A 8 T0446A 14 LO420A 2
9 T0479A 15 PO440A 3 T0419A 4 T0406A 10 T0466A ,
16 LO440A 11 PO400A 17 PO460A 5 TO439A T0426A 12 LO400A 18 LO460A 6
BLOCK 2 Colu=n Point Column Point 1 N0049A 7 T0017A 2 N0050A 8 T0043A 3 N0051A 9 T0059A 4 N0052A 10-13 Hottest T/C from each core Quadrant 5 T0002A 14-18 As Required 6 T0013A To initially clear each data block perform the following step for each block to be used. t
- 1. Push DIGITAL TREND button v 2. Select block number (1 to 6) on keyboard
- 3. Push VALUE 1 button
- 4. Select 0 on keyboard
- 5. Push VALUE 2 button
- 6. Push STOP button Repeat the above 6 steps for each data block to be used.
NOTE: A Block Trend Error message will occur if the data block is initially clear.
To set up the data blocks, perform the following series of steps for each point to be monitored.
- 1. Push the DIGITAL TREND button
- 2. Select the point address (i.e. PO480A) on the alphanumeric keyboard
- 3. Push ADDRESS button
- 4. Select block number (1 to 6) on keyboard.
- 5. Push VALUE 1 button
- 6. Select colu=n number (1 to 18) on keyboard
- 7. Push VALUE 2 button
- 8. Push START button
-a- 1787 048~
SPECIAL NO. 6 Page 3 of 4 12/15/79 APPENDIX D (Continued)
Once the blocks are set up they can be initiated by performing the following steps for each block.
- 1. Push DIGITAL TREND button.
- 2. Select block number (1 to 6) on keyboard
- 3. Push VALUE 1 button
- 4. Select internal number 0 = 30 sec., 1 = 1 minute, 2 = 2 minute, etc.) The 30-second interval is recommanded for the duration of the test transient
- 5. Push VALUE 3 button
- 6. Push START button If it is necessary to change the trend interval of a block or trend, perform the following.
- 1. Push DIGITAL TREND button
- 2. Select block number (1 to 6) on keyboard
- 3. Push VALUE 3 button
- 4. Select new interval number (0 = 30 sec., 1 = 1 min.,
2 = 2 min., etc) on keyboard
- 5. Push VALUE 3 button
- 6. Push START button To stop trending or block perform the following:
' l. Push DIGITAL TREND button
- 2. Select block number (1 to 6) on keyboard
- 3. Push VALUE 1 button
- 4. Select C on keyboard
- 5. Push VALUE 3 button
- 6. Push STOP button In addition to the data recorded on the trend typewriter, the following points will be monitored on analog trend recorded.
T0056A (Core exit temp).
Others as needed (Recommend pressurizer pressure, steam generator level (WR) and steam generator pressure).
Afcer selecting the per to be used to record a value, ensure that it is cleared by pe:: forming the following steps.
- 1. Push ANALOG TREND function button
- 2. Select per number (1 to 12) on keyboard
- 3. Push VALUE 1 button
- 4. Push STOP button 8 049
. . SPECIAL NO. 6 Page 4 of 4 12/15/79 APPENDIX D (Continued)
To start an analog trend perform the following steps.
- 1. Push ANALOG TREND function button
- 2. Select the computer point address (i.e. T0043A) -
on the alphanumeric keyboard
- 3. Push ADDRESS button
- 4. Select per number (1 to 12) on keyboard
- 5. Push VALUE 1 button
- 6. Sslect per position on keyboard. This is the minimum value of the parameter to be monitored
- 7. Select range on the keyboard
- 8. Push VALUE 3 button
- 9. Push START button Repeat these steps until all of tha desired analog points are being recorded.
Prior to initiation of the transient, and at 15-minute intervals thereafter, incore thermocouple maps will be recorded at the programmers console in the computer room.
To initiate an incore thermocouple map at that location, perform the following ,
steps.
- 1. Push IN-CORE T/C MAP function button
- 2. Falect 25 on keyboard for short-long current map
- 3. Push VALUE 1 button *
- 4. Select output device code number 20 for programmers console on keyboard.
- 5. Push VALUE 2 button
- 6. Select 1 on keyboard for a short-form map
- 7. Push VALUE 3 button
- 8. Push START button 23 1787 050
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