ML17212B632

Post-Accident Sampling Sys Instrumentation.

ML17212B632
Person / Time
Site:	Saint Lucie
Issue date:	04/07/1982
From:	FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17212B631	List: ML17212B630 ML17212B632
References
PROC-820407, NUDOCS 8205280455
Download: ML17212B632 (65)

Text

FUNCTIONAL TESTING FOR THE POST ACCIDENT SAMPLING SYSTEM INSTRUMENTATION Prepared by Combustion Engineering, Inc.

for Florida Power 5 Light Co.

St. Lucie Unit No. 2 - 1978 890 N Extension Prepared by:

Approved, by: ~k Cognizant upervisor

/1 in er Approved by:

pp ic on ngineer Approved by:

Prospect Manager Issue Date:

TABLE OF CONTENTS

~Pa e No.

I Background II Description of Test III Testing A. Boron Meter and pH probe Test 6 B. 02 and H2 Analyzer Test 12 C. Pressure Level Transmitter Test 16 IV Acceptance Criteria 22 V Data Sheets 23 Appendix I Boron Correction Due to Trisodium Phosphate List Of Figures Figure 1 Boron 5 pH Test Installation 10 Figure 2 Boron Meter Output Correlation 11 Figure 3 02 8 H2 Test Installation 15 Figure 4 Pressure & Level Transmitters Test Installation 19 Figure 5 Pressure Transmitter Output Correlation 20 Figure 6 Level Transmitter Output Correlation 21 Figure 7 Boron Meter Acceptance Criteria 36 Figure 8 pH Meter Acceptance Criteria 37 Figure 9 02 Analyzer Acceptance Criteria 38 Figure 10 H2 Analyzer Acceptance Criteria 39 Figure 11 Level Transmitter Acceptance Criteria 40 figure 12 Pressure Transmitter Acceptance Criteria 41 figure 13 Boron Concentration vs. Trisodium Phosphate Concentration Page 2

I Background The purpose of thi s test is to verify the performance of the process instrumentation used in the Post Accident Sampling System under the influence of the anticipated radiation fields.

The NRC Post-Accident Sampling System Safety Evaluation requires an additional licensing condition beyond those stated in NUREG-0737,Section II.B.3. This requirement is a data submittal supporting the applicability of each analytical chemistry procedure or on line instrument along with documentation demonstrating compliance with the licensing conditions four months prior to the plant exceeding 55 power operation. Applicability is to be demonstrated by experiment under the radiation and chemistry conditions anticipated under post-accident operation. This document describes the test program required for on'ine process instrumentation.

Page 3

II Descripti on of Test The Post Accident Sampling System employs on-line instrumentation to monitor pH, boron, entrained oxygen, entrained hydrogen, and total dissolved gas utilizing level and pressure transmitters. Each of these instruments are to be tested for applicability in a radiation and 'chemistry environment simulating that which is anticipated under post-accident operation. The objective is to determine if the radiation field would interfere with the instrument electronics resulting in inaccuracies beyond those considered acceptable for post accident sampling.

The test will require subjecting each of the instruments listed above to the design value radiation field. Data will be recorded to document the instrument accuracy for post accident chemistry ranges under both the irradiated and unirradiated condition. The test will be split into three phases'ith only two instruments being tested at a time.

The boron meter and pH probe will be tested together in one phase. A multimeter will be used to measure the output of the boron meter while the pH will be read out on a Beckman pH analyzer. The sample solution used in this phase will be demineralized water with approximately 2000 ppm of boric acid

.with a 4 to I radio of hydrated trisodium phosphate (Na3P04 12H20). A small pump will be used to recirculate the sample solution through the instruments. Independent pH readings will be taken periodically to verify the Beckman analyzer.

The 02 and H2 Analyers will be tested together in the second phase of the testing. Bottled gas with known concentrations of H2 and 02 will be used as the test medium in this phase. Written verification by the gas supplier des'cribing the actual gas content will be supplied prior to the start of the test.

The third phase will test the pressure and level transmitters. A static pressure will be applied to each transmitter for the duration of the radiation testing. Pressures of 2.5 psi and 60 psi are required. The transmitters voltage output will be measured by multi~eters.

Page 4

The radiation field will be 'identical for all three tests and will be conducted over a two day time period. On the first day of testing, the instruments will be placed in a radiation field of 10,000 rad/hr for the first 1/2 hour.

The radiation field will then be increased to 50,000 rad/hr for the next 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and then increased to 100,000 rad/hr for the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> for a total integrated dose of 7 x 10 rads. This testing will be continuous with no interruption. On the second day of testing, the radiation field will be increased to 200,000 RAD/hr and the instrument exposed for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, for a total integrated dose of 5.5 x 10 rads. The Radiation field will be generated by Cobalt 60 sources and the field value certified by the test facility.

During the radiation test, the instruments output will be read and recorded on the following schedule:

Radiation field Duration Time Between Readings 10,000 rad 1/2 hr 15 minutes 50,000 rad 2 hrs 15 minutes 100,000 rad 6 hrs 30 minutes 200,000 rad 24 hrs 60 minutes (for fi rst 8 hrs. only)

The design basis for post accident radiation exposure to the Post Accident Sampling System instrumentation is 7 x 105 rads. As stated, this value will be achieved during the fi rst day of testing. Continued exposure during the test to 5.5 x 106 rads or instrument failure is intended to identify the level of instrument margin.

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III Instrument Testin The following test procedures give the material required, prerequisites that must be completed, and a test procedure for each phase of the testing. The test procedure should be strictly adhered to and any variance should be documented by either the testing facility or by Combustion Engineering. Prior approval must be obtained from Combustion Engineering before deviating from the following procedure.

A. Boron Meter and H Probe Test

1. Material Required:

Sample Bottles Boron Meter pH probe and analyzer (test instruments) sample pump isolation valves demineralized water boric acid hydrated trisodium phosphate (NA3P04 - 12H20) multimeter copper tubing Swageloc fittings pH probe

2. Prerequisites

a. Test installation should be in accordance with Figure Figure 1.

b. Prepare 6-8 gallons of borated water (2000 ppm) with a 4 to 1 ratio of hydrated trisodium phosphate.

c. 120 VAC power supplied to the sample pump, boron meter, pH analyzer.

d. Calibration checks have been performed on the pH probe and boron meter according to vendor procedures.

e. The test loop is installed and all fittings have been checked for leaks. Hydrostatic test is performed with Page 6

nitrogen at 50 psi. Permissable leakage is 10 psi in 10 minutes.

f. With valves V-2 closed and V-1 open start the sample pump and discharge into a calibrated beaker (approximately 1 gallon). Adjust the sample pump speed control to obtain a flow of .5 to 1 gpm. Lock the pump speed control when the proper flow is established.

Close valve V-1 and open valve V-2.

g. All wiring connections between the pH probe and pH analyzer are connected.

h. All wiring connections between the boron meter and converter are connected. The boron meter output is connected to a multimeter 1-5 VDC.

i. Correlation between analyzer output and multimeter reading is shown on Figure 2.

3. Test Procedure With all items from Section III.A.2 complete, procede as follows:

Note: The boron concentration readout must be corrected due to the addition of trisodium phosphate in accordance with Appendix -I.

~Test Da 1

a. Draw a local sample and with an independent pH probe analyze and record the pH reading. By the Manitol Potentiometric method (ASTM D3082-79 Method B) or equivalent determine and record the actual boron concentration. The pH reading should be verified every. 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> during the testing.

b. Start the sample pump and recirculate the sample fluid through the test instrumentation. After 5 minutes, or when the reading on the multimeter levels out, record pH reading, boron meter output, and temperature.

Page 7

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Note: The sample pump will run continuously during this test.

c. Place the gaoma sources in the hot cell to produce a radiation field (measured on the instrument center line) of 10,000 rads/hr. Record instrument readings every 15 minutes.

d. At the end of 30 minutes, increase the radiation field to 50,000 RADS/hr. Record instrument readings every 15 minutes.

e. After 2 hours and a total integrated dose of approximately 200,000 rads, increase the dose rate to 1 x 10 5 rads/hr.

Record instrument readings every 30 minutes. Continue at this dose rate until a total integrated dose of 7 x 10 rads is achieved. Remove the gamma sources from the hot cell stop the sample"pump and secure testing.

Note: If the pH reading on the Beckman Analyzer begins to drift, then another local sample'ill be taken and analyzed with an independent pH probe to verify that the test solution chemistry has not changed.

Test Oay 2

f. Start the sample pump and recirculate the sample fluid through the test instrumentation. After 5 minutes, or when the reading on the multimeter levels out, record the pH reading, boron meter output, and temperature.

Note: The sample pump will run continuously during the first 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of the test.

g. Draw a local sample and with an independent pH probe, analyze and record the pH reading. The pH should be verified after 4 hours, 8 hours and 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Page 8

h. Place the gamna sources in the hot cell to produce a radiation field (measured on the instrument center line) of 200,000 rads/hr. Record instrument readings every 60 minutes for the first 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of this test. After 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, secure the sample pump.

i. After a total time of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in this radiation field, restart the sample pump. and draw a local sample. With an

, independent pH probe, analyze and record the pH reading.

After 5 minutes, or when the reading on the multimeter stabilizes, record pH reading, boron meter output and temperature. Measure total integrated dose the instrument has received and record.

Remove gamna sources from hot cell and disassemble test installation.

Page 9

HOT CELL GAMMA SORON SOURCES METER COSALT 69 pH PROSE PUMP LOCAL SAMPLE V.1 V2 510 GAI.LON TANK FIGURE 1 BORON AND pH PROBE TEST INSTALLATION Page 10

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B. 0 and H Analyzer Test

1. Material Required Size 1A Gas Cylinder 505 H2 and 50'5 N2 with Regulator Size 1A Gas Cylinder 965 N2 and 45 02 with Regulator 02 Analyzer with readout H2 Analyzer with readout Copper Tubing Swagelok fittings Flowmeters (2) 0 - 200 cc/min

2. Prerequisites

a. Test installation should be in accordance with Figure 3.

b. Calibration checks have been performed on the 02 and H2 analyzers in accordance with vendor procedures.

c~ 120 VAC power supplied to H2 and 02 analyzers.

d. The test loop has been installed and all fittings have been checked for leaks. A hydrostatic test is performed with nitrogen at 50 psi . Permi ssable leakage is 10 psi in 10 minutes.

e. All wiring connections between the 02 and H2 analyzer and their respective readout is complete.

Outlet .of the gas analyzers are run into the flow stream of the hot cell ventillation system.

go Crack open the regulator valve (V-5) on the 5X, 02 gas bottle until a flow rate of 50 - 100 cc/min is read on the 02 flow meter. Verify reading on the 02 readout agrees with the certification of the gas bottle. Permissable error is + 105. If this reading cannot be achieved, recali brate the instrument.

h. Crack open the regulator valve (V-6) on the 50~ H2 gas bottle until a flow rate of 50-100 cc/min is read out on the H2 flow meter. Verify reading on the H2 readout agrees with the certification of the gas bottle. Permissable error is + 105. If this reading cannot be achieved, recalibrate the instrument.

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I

3. Test Procedure

a. Mith all items from Section III.B.2 complete as follows:

Test Oay 3

a. Crack open the regulator valve on the 4$ 02 gas bottle until a flow rate of 50 - 100 cc/min is read on the 02 analyzer flow meter.

b. Secure flow from the 4g 02 gas bottle.

c. Crack open the regulator valve on the 50$ H2 gas bottle until a flow rate of 50 - 100 cc/min is reached on the H2 analyzer flow meter.

d. Secure flow from the 505 H2 gas bottle.

e. Place the galena sources in the hot cell to produce a radiation field (measured on instrument center line) of 10,000 rads/hr, Record instrument readings .every 15 minutes by repeating steps a through d above.

f. At the end of 30 minutes,. increase the radiation field to 50,000 rads/hr. Record instrument readings every 15 minutes by repeating steps a through d above.

After 2 hours and a total integrated dose of approximately 200,000 rads, increase the dose rate to 1 x 10 5 rads/hr.

Record instrument readings every 30 minutes by repeating

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steps a through d above. Continue at this dose rate until a total integrated dose of 7 x 105 rads is achieved.

Remove the gamma sources from the hot cell and secure testing.

Page 13

Test Day 4

h. Repeat steps 1 through 4 and record readings.

Place the gamma sources in the hot cell to produce a radiation field (measured on the instrument center line)'of 200,000 rads/hr. Record instruments readings every 60 minutes for the first 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of this test by repeating steps a through d.

After a total time of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in this radiation field, record instrument readings by repeating steps a through d.

Measure total integrated dose the instruments have received and record.

k. Remove gamma sources from hot cell and disassemble test installation.

Page 14

TO VENTILATION HOT CELL GAMMA

~ SYSTEM~

SOURCES COBALT sn 02 H2 0 ANALYZER ANALYZER V.S 02 GAS H2 GAS MIXTURE MIXTURE FIGURE 3 HZ AND OZ ANALYZER TEST INSTAI.LATION Page 15

/

C. Pressure and Level Transmitter Test

1. Material Required Pr essure transmitter Level transmitter Nitrogen bottle Regulator valve Pressure gauge Isolation valve Copper tubing Multi meters Swagelok fittings Power supplies

2. Prerequisites

a. Test installation should be in accordance with Figure 4.

b. 120 VAC power supplied to power supplies.

c. All wiring connections between the power supply transmiitter and multimeter are complete.

d. Calibration checks have been performed on both transmitters.

e. The test loop is installed and all fittings have been checked for leaks. Hydro preformed with nitrogen at 50 psi . No permissable leakage is allowed.

f. Fill the reference leg on the level transmitter to a height of 25 inches.

Fill the other leg to a height of approximaty 12". Cap both tubes to prevent evaporation of fluid.

g. Pressurize the pressure transmitter with N2 to 50 psig.

Leave regulating valve open to maintain the pressure in case of leakage.

h. Correlation between level transmitter and pressure transmitter output and multimeter meter reading is snown on Figures' and 6 respectively.

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4. Test Procedure With all items from Section III.C.2 complete, procede as follows:

Test Day 5

a. Record transmitter readout on the multimeter.

b. Place the gamma sources in the hot cell to produce a radiation field (measured on the, instrument center line) of 10,000 rads/hr. Record instrument readings every 15 minutes.

c. At the end of 30 minutes increase the radiation field to 50,000 rads/hr. Record instrument readings every 15 minutes.

d. After 2 hours and a total integrated dose of approximaatly 200,000 rads, increase the dose rate to 100,000 rads/hr.

Record instrument readings every 30 minutes. Continue at this rate until a total integrated dose of 7 x 10 rads is achieved. Remove gamma sources from the hot cell and secure testing by bleeding the pressure from the pressure transmitter.

Test Oay 6 e . Verify the water level in the tubing on the level transmitter. Establish 50 psi g pressure on the pressure transmitter. Record the instrument readings.

f. Place the gamma sources in the hot cell to produce a radiation field (measured on the instrument center line) of 200,000 rads/hr. Record instrument readings every 60 minutes for the first 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of this test.

g. After a total time of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in this radiation field, record the instrument readings .

Page 17

h. Remove gamma sources from the hot cell and disassemble the test instal ation.

1 Page 18

0 rl n GAMMA IIOT CELL SOURCES LEVEL COBALT TRANS.

60 V.3 PRESSURE TRANS.

FIGURE 4 PRESSURE ANO LEVEL TRANSMITTER TEST INSTALLATION Pane 19

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IV. Test Acceptance Criteria The previous curves (Figures 2, 5, and 6) give us the correlation between the instrument output and the readout shown on the vendor indicator or multimeter.

The boron meter output is 1-5VDC and is linear from 0-5000 ppm boron concentration. The Rosemount Transmitter output is 4 - 20 ma (linear) which corresponds to 0-100%, and 0-100 psig on the level and pressure transmitter respectively. Multimeters are used for output readings for, these instruments in lieu of the vendor supplied readout which will not be located in an adverse environment. This technique reduces test setup requirements.

Appendix I gives us the correlation between pH and actual boron concentration when trisodium phosphate is in solution.

The gas analyzer (02 and H2) and pH probe use their respective readouts that were supplied by their respective manufactu'rers.

The acceptance criteria for the Post Accident Sampling System instrumentation is based upon the accuracy of the instruments. The acceptance accuracies for the subject instruments are shown on Figures 7 through 12.

Page 22

V. Data Sheets The following data sheets will be filled in by personnel of Georgia Institute of Technology and verified by personnel of Combustion Engineering. The data will then be plotted on Figures 7 through 12 to show how the instrumentation performs in relation to the acceptance criteria.

Note: The attached Figures 7 through 12 are for example, only. The actual baseline readout will be established at the testing facility. The actual curves will be established at the testing facility and will be published in the final report. It should be noted that the instrument error of + 5(5 will remain the same . Deviation beyond this limit will constitute failure of that instrument.

Page 23

Instrument: 8oron Meter Test Oata Sheet Page 1 of 2 Tag No.: A-502 Manufacturer: Oynatrol Total Time Temperatur Radi ati on Integrated Instrument Remarks Field Oose Reading Page 24

lumeter Instrument: Boron Test Data Sheet Tag No.: A-502 Page 2 of 2 Manufacturer: Oynatrol Radiation Total Instrument Time Temperatur Field Integrated Reading Remarks Dose Page 25

Instrument: pH Probe Test Data Sheet Page 1 of 2 Tag No.: A-503 manufacturer: Seckman I'ndependen Total Time pH Radiation Inregrated Instrument Remarks Reading Filld Dose Reading

'age 26

Instrument: pH Probe Test.Oata Sheet Page 2 of 2 Tag No.: A-503 Manufacturer: Heckman Independent Total Time pH Radiation Integrated Instrument Remarks Reading Fi el d Oose Reading Page 27

Instrument: H, Analyzer Test Data Sheet Page l of 2 Tag No.: A-504 Manufacturer: Comsip Delphi Radiation Total Instrument Time Field Integrated Reading Remarks Dose Page 28

r Instrument: H2 Analyzer Rest Data Sheet Page 2 of 2 Tag No.: A-504 Manufacturer: Comsip Delphi Radiation Total Instrument Time Field Integrated Reading Remarks Dose Page 29

~ f Instrument: 0 Analyzer Test Data Sheet Page 1 of 2 Tag No.: A-505 Manufacturer: Comsip Oelphi Total Radiation Integrated Instrument Time Fi el d Dose Reading Remarks Page 30.

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Instrument: 02 Analyzer Test Data Sheet Page 2 of 2 Tag No.: A-505 Manufacturer: Comsip Delphi Radiation Total Instrument Time Integrated Field Reading Remarks Dose Page 31

C Instrument: Pressure Transmitter Test Oata Sheet Page 1 of 2 Tag No.: P504 Manufacturer: Rosemount Pressure Tota1 Time Gauge Radiation Integrated Instrument Remarks Reading fjeld Dose Reading Page 32

Instrument: Pressure Transmitter Test Data Sheet Page 2 of 2 Tag No.: P503 Manufacturer: Rosemount Pressure Total Time Gauge Radiation Integrated Instrument Remarks Reading Field Dose Reading Page 33

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g Instrument: Level Transmitter Test Data Sheet Paae 1 of 2 Tag No.: L-502 Manufacturer: Rosemount Radiation Total Instrument Time Field Integrated Reading Remarks Dose Page 34

Instrument: Level Transmitter Test Data Sheet Page 2 of 2 Tag No.: L-502 Manufacturer: Rosemount Radi ati on Total Instrument Time Field Integrated Reading Remarks Dose Page 35

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Appendix I I. If Na3P04 12H20 is used for sump pH control correction is made as follows:

A Use Figure 13 to obtain the ratio of ppm Na3P04 12H20 to ppm boron based on boron meter and pH meter readings.

B Using the boron meter reading and the ratio obtained from Figure 13, calculate a corrected boron concentration (ppm Boronc) as follows:

ppm Boron = Boron meter readin 1+(0.265xratio)

C If the above corrected boron concentration is within 50 ppm of the boron meter reading, record this value as the corrected boron concentration. Otherwise, proceed with the following steps.

0 Using the above corrected value and the boron meter readings, obtain a new ratio from Figure 13.

E Using the new ratio, calculate a new corrected boron concentration using the equation in step B.

F If the new corrected boron concentration is within 50 ppm of the previous iteration, record this value as the corrected boron concentration . Otherwise, using the new corrected boron concentration and boron meter reading, obtain a new ratio from Figure 13 and then to step f. 'eturn Page 42

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