ML19246A372

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Surveillance Procedure 2322-R3:ventilation/purge Exhaust Radiation Monitors
ML19246A372
Person / Time
Site: Crane Constellation icon.png
Issue date: 01/04/1978
From:
Metropolitan Edison Co
To:
References
2322-R3, TM-0634, TM-634, NUDOCS 7906180668
Download: ML19246A372 (38)
v • d • e


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TMI DOCUMEhTS T Ps-0 G DOCUMEhT NO:

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OF DOCUMENT PROVIDED BY COPY MADE ON t

METROPOLITAN EDISON COMPANY.

"Supebvisor,\\ Document Control, NRC 7 9 0 618 0 6G8

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228 307 i

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I 2322-R3 i

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Revision 1 7

01/04/78 THREE MILE IS ND NUCLEAR STATION.[;

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  • UNIT #2 SURVEILLANCE PROCEDURE 2322-R3'

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VENTILATION / PURGE EXHAUST RADIATION MONITORS e

Table of Effective Pages p,

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50.0 75.0 Unit Staff Recommends Appr val Unit 2 Staff Recommt.nds Approval Approval Date Approval I

Date

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Cognizant Dept. Head Cognizant Dept. Head Unit 1 PORC Recommend; Approval Unit 2 PORC Recommends Approval Date

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Date /

N Chairman of P0RC

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ItAp sal r f Unit 1 Superintendent Approval Unit 2 Su j

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Mk Date

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i Manager Geneution Quality Assurance Approval

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's 2322-R3 i

Revision 1 THREE MILE ISLAND NUCLEAR STATION 01/04/78 UNIT d2 SURVEILLANCE PROCEDURE 2322-R3 l

VENTILATION / PURGE EXHAUST RADIATION MONITORS WARNING: Prior to placing the RMS Interlock Cefeat Switch in Defeat, permission n:ust be granted by the Shift Foreman / Shift Supervisor, the Defeat Switch Key obtained from the Shift Foreman, and

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entry made in the Control Room Log.

1.0 PURPOSE To ver;ify, the calibration of the " Station Vent Monitor" Radiation Monitor HP-R-219 in accordance with the requirements of the Environmental Technical Specifications Section 2.4.4.D.

2.0 APPLICABLE SURVEILLANCE FREOURENCY AND MODES Operating or Shutdown.

2.1 Frequency - at least once per 18 months (R) 2.2 Modes - All.

3.0 LIMITS AND PRECAUTIONS 3.1 Exercise care in handling detectors to preven-Mmage to:

a.

Preamplifier Electronics.

b.

Detector Cable.

c.

Detector Cable Connectors.

3.2 Ensure that the unit is not d# char ing any radioactive gas waste while calibrating HP-R-219 " Station Vent Monitor".

3.3 Obtain permission from the Shi; c Foreman to take HP-R-219 out of service for calibration and log in Control Room Log.

228 309

2322 R3 I

Revision I ul/u9/7o 4.0 LOCATIOT1 0F ASSEMSLY HP-R-219 " Station Vent Monitor" is located on the 328'-0" elevation of the Unit #2 Auxiliary Building.

5.0 EQUIPMENT REQUIRED 5.1 Pulse Generator (Hewlett-Packard Model 8005A or-equivalent).

137 5.2 Cs (tio.177) Button source.

5.3 13'Ba (tio.177) Button source.

5.4 Scaler !!:ewlett-Packard Model #520ll or equivalent).

5.5 Oscilloscope (Tektronic Model 456 or equivalent).

5.6 10:1 Scope Probe.

6.0 PROCEDURE 6.1 Calibration check of Atmospheric Moniter Particulate Channel.

fiOTE 1:

Perform the following steps making no adjustments unless specifically required by the procedure steps.

Record Data on "As Found" Data Sheet 1.

Il0TE 2:

Perform tne following steps to reduce the background level on HP-R-219 prior to calibration.

1.

Leave the sampler air pump running.

2.

Close the sampier inlet isolation valve.

3.

Slowly open the cover on the particulate sampler.

Verify with tissue paper or other means that the air

- fl ow i s i nto t.h 2 sampler prior to cpening the cover a significant amount.

4.

With the cover open, continue to run the sampler air pump for five m'nutes.

5.

Close the sampler outlet valve and quickly turn off the samoier air pump.

228 310 2.0

2322.R3 1

5 Revision I 01/04/78 6.

Calibrate HP-R-219 for Section 6.1, 6.2, and 6.3.

7.

Upon comoleting this orocedure, return the monitor to normal by first closing the carticulate samoler cover and then ooening the samoler isolation valves and starting the air cumo.

NOTE 3:

Mark the individual channel recorder trace to indicate where the " Abnormal levels were imposed during this calibration.

6.1.1 Background Radiation Readings.

6.1.1.1 Obtain a copy of Data Sheet 1.

6.1.1.2 Attach the scaler (Section 5.4) to the binary of the log ratemeter board (between Rl3 and R16 or R18 and R14).

Attach the ground lead to the ratemeter chassis.

6.1.1.3 Place the readout module selector switch in the "0PER" posit'on.

6.1.1.4 f.easure the background level with a 10 minute run on the scaler.

Multiply the measured binary counts by 2 and divide by 10 minutes to obtain the background scaler CPM.

Read the

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radiation level for the monitor being calibrated from the ratemeter module and the appropriate po >. on the recorder

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located on Panel 12 and record these values along with the background scaler CPM in Step 6.1.1.4 on Data Sheet 1.

6.1.2 Button Source Readings.

6.1.2.1 With the lid off the moving filter paper particulate monitor sampler, rcmove the lead shielding blockn and capstan assembly 137 from the assembly.

Attach the Cs (No. 177) button source, in the source holder, to the detector.

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2322-R3 l

Revision 1 01/04/78 NOTE:

The detector is not taken out of the sampler.

6.1.2.2 Allow the indicated radiation level on the recorder and ratemeter module tc stabilize.

Then record the radiatinn level for the monitor being calibrated from the ratemeter module indicator and from the appropriate point on the recorder in Step 6.1.2.2 5

on Data Sheet 1.

d 6.1 ?.3 Take a two minute scaler run and record the scaler CPM with the button source on the detector in Step 6.1.2.3.

I 6.1.2.4 Remove the Cs (No. 177) button source holder, containing the button source, from the detector.

6.1.2.5 Carefully install the capstan assembly in the sampler and the lead shielding blocks.

6.l.2.6 install the lid on the particulate sampler and latch into place.

6.1.3 Background Correction of Radiation Source Readings.

6.1.3.1 Subtract the background readings obtained in Step 6.1.1.4 from the associated button source readings obtained in Steps 6.1.2.2 and 6.1.2.3.

Enter these results in the " Corrected Source Readings" in Step 6.1.3.1 on Data Sheet 1.

6.1.4 Calculation of Expected Source Readings.

6.1.4.1 Obtain the " Original Source Reading" and the date of the 137 "Griginal Source Reading" for the Cs (No. 177) button source frcm the Isotopic Calibration Test Report section of the Victoreen Technical Manual, and record this data on Data Sheet 1.

6.1.4.2 Calculate "t" to the nearest month.

"t" is the time elapsed between the " Original Source Reading" (CPM) date and the date of the source take.

or this calibration.g }}} 4.0

2322 Ry 1 i Revision 1 01/04/78 6.1.4.3 Calculate the expected source reading using Table 1. Enter the expected source reading on Data Sheet 1. 6.1.5 Comparison of Corrected Source Readings ( Actual) and the Excepted Source Readings. 6.1.5.1 Compare the " Corrected Source Readings" with the " Expected ~ Scurce Reading". The scaler value of the "Correeted Source Reading" should be within + 15% of the " Expected Source Reading" value. Record this in Step 6.1.5.1 of Data Sheet 1. 6.1.5.2 Compare the value obtained from the " Corrected Source Reading" of the ratemeter with the value of the " Corrected Source Reading" of the scaler. The scaler value of the " Corrected Source Reading" should be within one minor division of the ratemeter value of the " Corrected Source Reading". Record this in Step 6.1.5.2 of Data Sheet 1. 50TE: A minor division of the ratemeter is the distance between any "8" on the indicator and the next higher mark. 6.1.5.3 Compare the value obtained from the " Corrected Source Reading" of the recorder with the value of the " Corrected Source Readir.gs"

o. the scaler.

The reading should be within one minor division of the recorder scale. Record on Data Sheet 1. NOT2. A minor division on the recorder is the distance between any "9" on the scale and the next higher mark. 6.1.5.4 If the readings do not compare within the tolerances allowed. document this as a deficiency on an "E/D" sheet. 5.0 e

S 2322 R3 l Revision I 01/04/78 NOTE: If any deficiencies are noted, they will be corrected per Section 6.1.8 of this procedure. 6.1.6 Verification of " Alert" and "High" Alarm Setpoints. 6.1.6.1 Enter the required " Alert" and "High" Alarm setpoints in Step 6.1.6.1 of Data Sheet 1. NOTE: The alarm setpoints must be obtained from 2105-1.12. 6.1.6.2 Open the signal and 16V links at the rear of Panel 12 for the monitor being calibrated. CAUTION: Adjust the pulse repetition rate of the Signal Generator (Section 5.1) to zero prior to connecting it to the ratemeter. 6.1.6.3 Connect the pulse generator to the signal input connector and adjust the pulse generator for a negative polarity with a 1.0 volt amplitude, zero repetition rate, and a 1.0 usec. pulse width. 6.1.6.4 Slowly increase the pulse repetition rate until the " Alert" alarm light energizes. Record the ratemeter reading at which the " Alert" alarm was tripped in Step 6.1.6.4 on Data Sheet 1. Reset all the associatec alarms. 6.1.6.5 Continue to sicwly increase the pulse repetition rate until the "High" alarm light energizes. Record the ratemeter reading at which the "High" alarm was tripped in Step 6.1.6.5 on Data 3heet 1. 6.1.6.6 Compare the observed " Alert" and "High" alarm trip setpoints with the required setpoints which were entered in Step 6.1.6.1 on Data Sheet 1. The observed setpoint should equal the required setpoint. The tolerance on these setpoints is plus 6.0

a 2322 R3 I Revision 1 01/04/73 zero, minus one minor d;visi]n of the ratemeter scale see NOTE in Step 6.1.5.2 of this promedore. 6.1. 6. 7 Disconnect and remove the pulse generator, then reconnect the detector signal and 16V links. 6.1.6.8 Place the function selector switch on the readout module for the conitor being calibrated in the " CAL" position. 6.1.6.8.1 Depress the " Alert" alarm pushoutton and record the "As Founc" ratemeter reading in Step 6.1.6.8.1 on Data Sheet 1. Release the " Alert" alarm pushbutton. Compare this reading with the ratemeter reading at which-the " Alert" alarm tripped in Step ~ 6.1. 6. 4. The value obtaired in this stop must agree with the value obtained in Step 6.1.6.4. The tolerance is minus one, plus zer0 minor division of the ratemeter; See NOTE is Step 6.1.5.2 of this procedure. If the setpoint is not within the tolerance allowed, document this as a Jeficiency on "E/D" sheet. 6.1.6.8.2 Depress the "High" alarm pushbutton and record the "As Found" ~~ retemeter reading in Step 6.1.6.8.2 on Data Sheet 1. Release the "Migh" alarm pushbutton. Compare this reading wi'th the ratemeter reading at which the "High" alarm tripoed in Step 6.1.6.5. The value obtained in this step must agree with the value obtainet. in Step 6.1.6.5. The tole-ance is minus one, plus zero minor division of the ratemeter scale; See N0lE in step 6.1.5.2 of this procedure. If the setpoint is not within the tolerance allowed, document this as a deficiency on an "E/D" sheet. 7.0

i 2322-R3 I i i Revision 1 01/04/78 6.1.6.9 Return the function selector switch to che "0PER" Desition. 6.1.7 Determination of Check Source Raadings for Weekly Surveillance Checks. 6.1.7 1 Depress the "CS" pushbutton. After the reading has stabilized, determine the number of counts per minute that the reading increased above background. Record the value ir ' Step 6.1.7.1 on Data Sheet 1. 6.1.7.2 Re' turn the RMS Interlock Defeat Switch for HP-R-219 from the DEFEAT to the NORMAL position on Panel 12. 6.1.8 Deficiency Corrections. NOTE: If any deficiencies were found, they must oe corrected using the calibration procedures of Appendix A, using the applicable sections described below. 6.1.8.1 If the scaler CPM does not agree with the required CPM witnin the tolerance specified, perform Section A.1 through A.6. 6.1.8.2 If the recorder or the panel meter does not agree with the scaler CPM within the tolerance specified, perform Section A.8 and A.9. 6.1.8.3 If the Alert and High alarm test results are out of tolerance, perform Section A.9. 6.1.8.4 If any adj'istments were made, repeat Sections 6.1.1 through 6.1.8. Record the final values on another copy of Data Sheet 1 marked "As left". Provide copies of these Dato Sheets and "E/D" sheets, for the deficiencies found on the monitor beir.g calibrated, to the H.P. Supervisor and to the I&C Engineer. 228 316 ~ 8.0 d

2322-R3 I Revision 1 01/04/78 6.2 Calibration check of Atmospheric Monitor Iodine ChannS. MTEl' Perform the follow.ng steps traking no adius ments unless specifically required by the procedure ster;. Record Data on "As Found" Data Sheet 2. NOTE 2: Mark the individual channel recorder trace a indicate where the " Abnormal" levels were imposed du ing this calibration. 6.2.1 Bai:kground Radiation Readings. 6.2.1.1 Obtain a copy of Data Sheet 2. 6.2.1.2 Attach the scaler (Section 5.4) to the binary of the log ratemeter board (cetween R13 and R16 or R18 and '14). Attach the ground lead to the ratemeter chassis. 6.2.1.3 Verify that the toggle switch on the analyzer cir:uit board is in the analyze mode, toggle switch up. 6.2.1.4 Place the readout module func'. ion selector switca in the "0PER" position. 6.2.1.5 Measure the background level with a 10 minute run on the scaler. Multiply the measured binary counts by 2 and divide by 10 minutes to cbtain the background scaler CP".. Read the radiation level for the monitor being calibrated from the ratemeter moduie and the appropriate point on the recorder located on Panel 12 and record these values along with the background scaler CPM in Step 6.2.1.5 on Data Sheet 2. 6.2.2 Button Source Readings. 6.2.2.1 Remove the filter holder from the sampler and attach the Ba (No.177) button source to the filter assembly. Replace the fi'ter holder. 228 M,' 9.0 i

2322-R3 l Revision 1 01/04/7S 6.2.2.2 Allow the indicated radiation level on the recorder and ratemeter module to stabilize. Then record the radiation level for the monitor being calibrated from the rateneter module indicator and from the appropriate point on the recorder in Step 6.2.2.2 on Data Sheet 2. 6.2.2.3 Take a two minute scaler run and recorJ the scaler CPM with the button source on the detector in Step 6.2.2.3. 6.2.2.4 Re' move the 133Ba (No.177) button source from the filter holder assembly. Replace the filter holder. 6.2.2.5 Remove the filter holder from the sampler and attach the.33Cs (No.177) button source to the filter assemply. Replace the filter holder. 6.2.2.6 Allcw the indicated radiation level on the recorder and ratemeter module to stabilize. Then record the rauiation level for the monitor being calibrated from the rateneter module indicator and from the appropriate point on the recorder in Steo 6.2.2.6 on Data Sheet 2. 6.2.2.7 Take a two minute scaler run and record the scaler CPM with the button source on the detector in Step 6.2.2.7. 6.2.2.8 Remove the 13"'Ba (No.177) button source frcm the filter holder assembly. Replace the filter holder. 6.2.3 Background Correction of Radiation Source Readings. 6.2.3.1 Subtract the background readings obtained in Step 6.2.1.4 from the associated button source readings obtained in Steps 6.i 2.2 and 6.2.2.3. Enter these results in the " Corrected Source Readings" in Step 6.2.3.1 on Data Sheet 2. 10.0 228 318

~. 2322-RJ Revision 1 01/05/78 6.2.4 Calculation of Expected Source Rcadings. 6.2.4.1 Obtain the " Original Scurce Reading" and the date of the 133 " Original Source Reading" for tha Ba (No. 177) button source from the Isotopic Calibration Test Report secticr of the Victoreen Technical Manual, and record this data on Data Sheet 2. 6.2.4.2 Calculate "t" to the nearest month. "t" is the time elapsed be' tween the " Original Source Reading" (cpi) date and the date of t'ie source taken for this calibration. 6.2.4.3 Calculate the expected source reading using Table 1. Enter the expected source reading on Data Sheet 1. 6.2.5 Comparison of Corrected Source Readings (Actual) and the 2xcepted Source Readings. 6.2.5.1 Compare the " Corrected Source Readings" with the " Expected Source Reading". The scaler value of the " Corrected Source Reading" should be within + 15" of the " Expected Source Rcading" value. Record this in Step 6.2.5.1 of Data Sheet 2. 6.2.5.2 Compare the value obtained from the " Corrected Source Reading" of the ratemeter with the value of the " Corrected Source Reading" o, the scaler. The scaler value of the " Corrected Source Reading" should be within one minor division of the retemeter value of the " Corrected Source Reajing". Record this in Steo 6.2.5.2 of Data Sheet 2. NOTE: A minor division of the ratemeter is the distance between any "8" on the indicator and the next higner mark. 11.0 228 319

4 4 2322-R3 1 Revisinn 1 01/04/78 6.2.5.3 Compare the value obtained from the " Corrected Source Reading" of the recorder with the value of the " Corrected Source Readings" of the scaler. The reading should be within one minor division of the recorder scale. Record on Data Sheet 2. NOTE: A minor division on the recorder is the distance between any "9" on the scale and the next higher mark. 6.2.5.4 If, the readings do not compare within the tolerances allowed, document this as a deficiency oa an "E/D" sheet. NOTE: If any deficiencies are noted, they will be corrected per Section 6.2.8 of this procedure. 6.2.6 Verification of " Alert" and "High" Alarm Setpoints. 6.2.6.1 Enter the required " Alert" and "High" Alarm setpoints in Step 6.2.6.1 of Data Sheet 2. NOTE: The alarm setpoints must be obtained from 2105-1.12. 6.2.6.2 Open the signal and 16V links at the re&r of Panel 12 for the monitor being calibrated. CAUTION: Adjust the pulse repetition rate of the Signal Generator (Section 5.1) to zero prior to connecting it to the ratemeter. 6.2.6.3 Connect the pulse generator to the signal input connector and adjust the pulse generator for a negative polarity with a 1.0 volt amplitude, zero repetition rate, and a 1.0 usec. pulse width. 6.'.6.4 Slowly increase the pulse repetition rate until the " Alert" ~ alarm light energizes. Record the ratemeter reading at which the " Alert" alarm was trioped in Step 6.2.6.4 on Data Sheet 2. g }}Q Reset all the associated alarms. 12.0

2322-R3 I I Revision 1 01/04/78 6.2.6.5 Continue to slowly increase the pulse repetition role until the "High" alarm light energizes. Record the ratemeter reading at which the "High" alarm was tripped in Step 6.2.6.5 on Data Sheet 2. 6.2.6.6 Compare the observed " Alert" and "High" alarm trip setpoints with the required setpoints which were entered in Step 6.2.6.1 on Data Sheet 2. The observed setpoint should equal the rdquired setpoint. The tolerance on these setpoints is plus zero, minus one minor division of the ratemeter scale see NOTE in Step 6.2.5.2 of this procedure. 6.2.6.7 Disconnect and remove the pulse generator, thpq reconnect the detector signal and 16V links. 6.2.6.8 Place the function selector switch on the readout module for the monitor being calibrated in the " CAL" position. 6.2.6.8.1 Depress the "Aiert" alarm pushbutton and record the "As Found" ratemeter reading in Step 6.2.6.8.1 on Data Sheet 1. Release the " Alert" alarm pushbutton. Compare this reading with the ratemeter reading at which the " Alert" alarm tripped in Step 6.2.6.4. The value obtained in this step must agree with the value cbtained in Step 6.2.6.4. The tolerance is minus one, plus zero minor divis;on of the ratemeter; See NOTE is Step 6.2.5.2 of this procedure. If the setpoint is not within the tolerance allowed, document this as a deficiency on "E/D" sheet. 6.2.6.8.2 uepress the "High" alarm pushbutton and record the "As Found" ratemeter readin; in Step 6.2.6.8.2 on Data Sheet 2. Release e the "High" alarm pushbutton. Compare this reading with the 223 321 13.0

4 } 2322-R3 l Revision 1 01/04/78 ratemeter reading at which the "High" alarm tripped in Step 6.2.6.5. The value obtained in this step must agree with the value obtained in Step 6.2.6.5. TFe tolerance is minus one, plus zero minor division of the ratemeter scale; See NOTE in step 6.2.5.2 of this procedure. If the setpoint is not within the tolerance allowed, document this as a deficiency on an "E/D" sheet. 6.2.6.9 Rett rn the function selector switch to the "0PER" position. 6.2.7 Determination of Check Source Readings for Weekly Surveillance Checks. 6.2.7.1 Depress the "CS" pushbutton. After the reading hi.s stabilized, determine the number of counts per minute that the reading increased above background. Record the value in Step 6.2.7.1 on Data Sheet 2. 6.2.7.2 Return the RMS Interlock Defeat Switch for HP-R-219 from the DEFEAT to the NORMAL position on Panel 12. 6.2.8 Deficiency Corrections. NOTE: If any deficiencies were found, they must be corrected using the calibration procedures of Appendix A, using the applicable sections described below. 6.2.8.1 If the scaler CPM does not agree with the required CPM within the tolerance specified, perform Section A.1 through A.7. 6.2.8.2 If the recorder or the panel meter does not agree with the scaler CPM within the tolerance specified, perform Section A.8 and A.9. 6.2.8.3 If the Alert and High alarm test results are out of tolerance, perform Section A.8. 228 322 lt.3

i 22:: a n 1 .!/. 6.2.8.4 If any adj us tments were mace, repeat Sections 6. '. ' -

h 6.1.8.

Record the final values on another copy teet - ~ ~ 2 marked "As Left". Provide copies of these Dat-

nd "E/D" sheets, for the deficiencies found on t' e sing calibrated, to the H.P. Supervisor and to the IS:

6.3 Calibration check of Atmospheric Monitor Gaseous Cn;.n.a.. NOTE l'. Perform the following steps making no aciun

ess

~ specifically required by the procedure s '.eu. ~ i Data on "As Found" Data Sheet 3. NOTE 2: Mark the ind1;idual channel recorder trace r-

e where the " Abnormal" levels were imposed du:- ;

calibration. 6.3.1 Background Radiation Readings. 6.3.1.1 Obtain a copy of Data Sheet 3. 6.3.1.2 Attach the scaler (Section 5.4) to the binary of ratemeter board (between R13 and d.16 or Ri? and Ri?). ach the gr^und lead to the ratemeter chassis. 6.3.1.3 Place the readout nodule function selector switcn.i "0PER" position. 6.3.1.4 Measure the background level with a 10 minute ru:, scaler. Multiply the measured binary counts by ' .6 'de by 10 minutes to obtain the background scaler CF. che radiation level for the monitor being calibrated.: om ratemeter module and the appropriate point on the rec: locatad on Panel 12 and record these values along -i th a background scaler CPM in Step 6.3.1.4 on Data She' 2. 15.0

'e 2322-R3 1 Revision 1 01/04/73 6.3.2 Button Source Readings. 6.3.2.1 Remove the detector from the sampler and attach the CS (No. 177) button source, in the source holder, to the detector. 6.3.2.2 Replace the detector in the well and close the other shield door. 6.3.2.3 Allow the indicated radiation level on the recorder and ratemeter a module to stabilize. Then record the radiation level for the monitor being calibrated from the ratemeter module irdicator and from the appropriate point on the recorder in Ste? 5.3.2.2 on Data Sheet 3. 6.3.2.4 Take a two minute scaler run and record the scaler CPM with the button source on the detector in Step 6.3.2.3. 6.3.2.5 Remove the detector and button source holder from the sampler. 137 6.3.2.6 Remove the button source holder containing the Cs (No. 177) button source from the detector. 6.3.2.7 Re-install the detector in the sampler and close and tighten shield door. 6.3.3 Background Correction of Radiction Source Readings. 6.3.3.1 Subtract the background readings obtained in Step 6.3.1.4 from the associated button source readings obtained in Steps 6.3.2.2 and 6.3.2.3. Enter these results in the " Corrected Source Readings" in Stto b.3.3.1 on Data Sheet 3. 6.3.4 Calculation of Expected Source Readings. 6.3.4.1 Obtain the " Original Source Reading" and the date of the " Original Source Reading" for the Ce (No.177) button source from the Isotopic Calibration Test Report section of the Victoreen Technical Manual, and record this data on Data Sheet 3. g }}4 16.0

~ 2322-R 3 l Revision 1 01/04/73 6.3.4.2 Calculate "t" to the nearest month. "t" is the time elacsed between the " Original Source Reading" (CPM) date and the date of the source taken for this calibration. 6.3.4.3 Calculate the expected sr rce reading using Table 1. Enter the expected source reading on Data Sheet 3. 6.3.5 Comparison of Corrected Source Readings (Actual) and the Excepted Source Readings. 6.3.5.1 Cpmpare the " Corrected Source Readings" with the " Expected Source Reading". The scaler value of the " Corrected Source Reading" should be within + 15% of the " Expected Source Reading" value. Record this in Step 6.3.5.1 of Data Sheet 3. 6.3.5.2 Compare the value obtained from the " Corrected Source Reading" of the ratemeter witn the value cf the " Corrected Source Reading" of the scaler. The scaler value of the " Corrected Source Reading" should be within one minor division of th: ratemeter value of the " Corrected Source Reading". Record this in Step 6.3.5.2 of Data Sheet 3. NOTE: A minor division of the ratemeter is the distance betwoen any "8" on the indicator and the next higher mark. 6.3.5.3 Compare the value obtained from the " Corrected Source Reading" of the rc : order wi th the value of the " Corrected Source Readings" of the scaler. The reading should ce within one minor division of the recorder scale. Record on Data Sheet 3. NOTE: A minor division on the recorder is the distance ~ bett.en any "9" on the scale and the next higher mark. 17.0

2322-R3 I' Revision ! 01/0"/78 6.3.5.4 If the readings do not compare within the tolerances allowed, document this as a deficiency on an "E/D" sheet. fl0TE: If any deficiencie: are noted, they will be corrected per Section 6.3.8 of this procedure. [ 6.3.6 Verification of " Alert" and "High" Alarm Setpoints. 6.3.6.1 Enter the required " Alert" and "High" Alarm setpoints in Step 6,.3.6.1 of Data Sheet 3. NOTE: The alarm setpoints must be obtained from 2105-1.12. 6.3.6.2 Open the signal and 16V links at the rear of Panel 12 for the monitor being calibrated. CAUTI0ti: Adjust the pulse repetition rate o' the Signal Generator (Section 5.1) to zero prior to connecting it to the ratemeter. 6.3.6.3 .1nect the pulse generator to the signal input connector and adjust the pulse generator for a negative polarity with a 1.0 volt amplitude, zero repetition rate, and a 1.0 usec. pulse width. 6.3.6.A Slowly increase the pulse repetitiun rate until the " Alert" alarm light energizes. Record the ratemeter reading at which the " Alert" alarm was tripped in Step 6.3.6.4 on Data Sheet 3. Reset all the associated alarms. 6.3.6.5 Continue to slowly increas.e the pulse repetition rate until the "High" alarm light energizes. Record the ratemeter reading at which the "High" alarm was tripped in Step 6.3.6.5 on Data Sheet 3. '*~ 228 326 i

4 2322-R3 I i Revision 1 01/04/78 6.3.6.6 Ccmpare the observed " Alert" and "High" alarm trip secpoints with the required setpoints which were entered in Step 6.3.6.1 on Data Sheet 3. The observed setpoint should equal the requi rr" setpoint. The tolerance on these setpoints is plus zero,,:,us one minor division of the ratemeter scale see NOTE in Step 5.3.5.2 of this procedure. 6.3.6.7 Disconr.:t c d remove the pule.e generator, then reconnect the detector signal and 16V links. 6.3.6.8 Place ! e function selector switch on the readout module for the mor.i tor being calibrated in the " CAL" position. 6.3.6.8.1 Depress the " Alert" alarm pushbutton and record the "As Found" ratemeter reading in Step 6.3.6.3.1 on Data Sheet 3. Release the "Al_rt" alarm pushbutton. Compare this reading with the ratemet'_r readine at which the " Alert" alarm tripped ir itep 6.3.6.4. The value obtained in this step must agree w;;n the value obtained in Step 6.3.6.4. The tolerance is minus one, plus zero minor division of the ratemeter; See NOTE is Step 6.3.5.2 of this procedure. If the setpoint is not within the tolerance allowed, document this as a deficiency on "E/D" sheet. 6.3.6.8.2 Depress the "High" alarm pushbutton and record the "As Fcund" ratemeter reading in Step 6.3.6.8.2 on Data Sheet 3. Release the "High" alarm pushbutt]n. Compare this reading with the ratemeter reading at which the "High" alarm tripped in Step 6.3.6.5. The value obtained in this step must agree with the value cotained in Step 6.3.6.5. The tolerance is minus one, plus zero minor division of the ratereter scale; See NOTE in 19.0

2322-R3 I Revision 1 01/04/78 steo 6.3.5.2 of this procedure. If the setpoint is not within the tolerance allcwed, document this as a deficiency on an "E/D" sheet. 6.3.6.9 Return the function selector switch to the "0PER" position. ~ 6.3.7 Determinatiun of Check Source Readings for Week,1y Surveillance Checks. 6.3.7.1 Depress the "CS" pushbutton. After the reading has stabilized, determine the r. umber of counts per minute that the reading increased above background. Record the value in Step 6.3.7.1 on Data Sheet 3. 6.3.7.2 Return the RMS Interlock Defeat Switch for HP-R-219 from the DEFEAT to the NORMAL position on Fanel 12. '.3.8 Deficiency Corrections. NOTE: If any deficiencies were found, they must be corrected using the calibration procedures of Appendix A, using the applicable sections described below. 6.3.8.1 If the scaler CPM does not agree with the required CPM within the tolerance specified, perform Section A.1 through A.6. 6.3.8.2 If the recorder 1r the panel meter does not agree with the scaler CPM within the tolerance specified, perform Section A.7 and A.S. 6.3.8.3 If the Alert and High alarm test results are out of tolerance, perform Section A.8. O e 4 20.0 2128 328 e

2322-R3 I Revision 1 01/04/78 6.3.8.4 If any adjustrents were made, repeat Sections 6.1.1 through 6.1.8. Record the final values on another copy of Data Sheet 1 marked "As left". Provide copies of these Data Sheets and "E/D" sheets, for the deficiencies found on the monitor being calibrated, to the H.P. Supervisor and to the IfC Engineer. 7.0 ACCEPTANCE CRITERIA 7.1 The acceptance criteria i', stated on the Data Sheet. 21.0 228 329 i

i 2322 R3 l Revision 1 DATA SHEET I 01/04/78 VENTILATION / PURGE EXHAUST RADIATION MONITORS SURVEILLANCE PROCEDURE REQUIRED INTERVAL - QUARTERLY WARNING: PRIOR TO PLACING THE RMS INTERLOCK DFFEAT SWITCH FOR HP-R-219 IN DEFEAT, PERMISSION MUST BE GRANTED BY THE SHIFT SUPERVISOR / SHIFT FOREMAN, THE DEFEAT SWITCH KEY OBTAINED FROM THE SHIFT FOREMAN, AND ENTRY MADE IN THE CONTROL ROOM LOG. AS FOUND AS LEFT Procedure Steo No. Initials Channel HP-R-219 (Particulate) 6.1.1.4 Background scaler (CPM) 6.1.1.4 recorcer (CPM) 6.1.1.4 ratemeter (CPM) 6.1.2.3 Source Reading ( 37Cs) scaler (CPM) 6.1.2.2 recorder (CPM) 6.1.2.2 ratemeter (CPM) 6.1.3.1 Corrected Source Reading (137Cs) scaler (CPM) 6.1.3.1 recorder _ (CPM) 6.1.3.1 ratemeter (CPM) 6.1.4.1 Original Source reading (137Cs) (CPM) 6.1.4.1 Original Source reading date t= yr 6.1.4.3 Expected Source Reading ( 37Cs) (CPM) 6.1.5.1 Corrected Scaler source reading within 15% of expected yes/no 6.1.5.2 Panel meter within one minor division of scaler _ yes/no 6.1.5.3 Recorder within one minor division of scaler _ yes/no 6.1.6.1 Required Alert Setpoint (CPM) 6.1.6.4 Observed Alart Setpoint (CPM) 6.1.6.1 Required High Alarm Setpoint (CPM) 6.1.6.5 Ob: rved High Alarm Setpoint_ (CPM) 6.1.6.6 Observed Alert and High Alarm Setpoints equal required within plus zero, minus one minor division Alert yes/no High yes/no 6.1.6.8.1 As Found Alert Setooint (CPM) 6.1.6.8.1 As Found Alert Setpoint equals Observed Alert Setpoint within plus one, minus zero minor division yes/no 6.1.6.8.2 As Found High Alarm Setpoint (CPM) 6.1.6.8.2 As Found High Alarm Setpoint equals Observed High Alarm Setroint within plus zero, minus one minor division . _yes/no 6.1.7.1 Observed increase in reading due to check source (CPM) Recorder Trace Marked yes/no Acceptance Criteria: All yes/no blanks indicate "yes". Performed by Date Approved by Date 22.0 228 330

I 2322-R3 i Revision 1 DATA SHEET 2 01/04/78 VENTILATION / PURGE EXHAUST RADIATIO:1 MONITORS SURVEILLANCE PROCEDURE REQUIRED INTERVAL - QUARTERLY WARNING: PRIOR TO PLACING THE RMS INTERLOCK DEFEAT SWITCH FOR FP-R-219 IN DEFEAT, PERMISSION MUST BE GRANTED BY THE SHIFT EUPERVISOR/ SHIFT FOREMAN, THE DEFEAT SWITCH KEY OBTAINED FROM THE SHIFT O REMAN, AND ENTRY MADE IN THE CONTROL RCOM LOG. AS FOUNC AS LEFT ~ Procedure Steo No. T r.i ti a l s Channel HP-R-219 (Icdine) 6.2.1.4 Bac< ground scaler -(CPM) _ CPM) ( 6.2.1.4 recorder _ _ 6.2.1.4 ratemeter (CPM) 6.2.2.3 Source Reading (133Ba) scaler (CPM) 6.2.2.2 recorder (CPM) 6.2.2.2 ratemeter (CPM) Source Reading (137Cs) Scaler (CPM) reco rde r (CPM) ratemeter (CPM) 6.2.3.1 Corrected Source Reading (1 3Ba) scaler (CPM) 6.2.3.1 recorder (CPM) 6.2.3.1 ratemeter (CPM) 6.2.4.1 Original Source reading ()338a) (CPM) 6.2.4.1 Original Source reading date t= yr 6.2.4.3 Expected Source Reading ( 33Ba) (CPM) 6.2.5.1 Corrected Scaler source reading within 15% of expected yes/no 133 5~. 133Ba < 137Cs scaler reading < 15g Ba yes/no 6.2.5.2 Panel meter within one minor divisi)n of scaler yes/no 6.2.5.3 Recorder within one minor division of scaler yes/no 6.2.6.1 Required Alert Setpoint (CPM) 6.2.6.4 "As Observed" Alert Setpoint (CPM) 6.2.6.1 Required High Alarm Setpoint (CPM) 6.2.6.4 "As Observed" High Alarm Setpoint (CPM) 6.2.6.6 Observed Alert and High Setpcint within plaa 0, minus one minor scale division of required setpoint. Alert yes/no High Alarm yes/no 6.2.6.8.1 "As Found" Alert Setpoint (CPM) 6.2.6.8.1 "As Found" High Alarm Setpoint (CPM) 6.2.6.8.2 "As Found" Setpoints within plus zero, minus one minor scale division of observed alert yes/no High Alarm yes/no 6.2.7.1 Observed increase in reading due to cneck source (CPM) Recorder Trace Marked yes/no ACCEPTANCE CRITERIA: All yes/no blanks indicate "yes". Performed by Date Approved by Date 22.0 228 331

2 322-R3 I Revision 1 DATA SHEET 3 01/04/76 'iENTILATION/ PURGE EXH'AUST RADIATION MONITCRS SURVEILLANCE PRCCEDURE REQUIRED INTERVAL - QUARTERLY '..'A RN I N G : PRIOR TO PLACING THE RMS INTERLCCK DEFEAT SWITCH FOR HP-R-219 IN DEFEAT, PERMISSION MUST BE GRANTED BY THE SHIFT SUPERVISOR / SHIFT FOREMAN, THE DEFEAT SWITCH KEY OSTAINED FROM THE SHIFT FOREMAN, AND ENTRY MADE IN THE CONTROL ROOM LOG. AS FOUND AS LEFT Procedure Steo No. Initials Channel HP-R-219 (Caseous)

6. 3.1. 4 Background scaler (CPM)
6. 3.1. 4 recorder (CPM) ratemeter (CPM) 6.3.1.4 6.3.2.3 Source Reading (137Cs) scaler (CPM) 6.3.2.3 recorder (CPM) 6.3.2.3 ra temeter (CPM) 6.3.3.1 Corrected Source Reading (137Cs) scaler (CPM)
6. 3. 3.1 recorder (CPM) 6.3.3.1 ratemeter (CPM) 6.3,4.1 Original Source reading (137Cs)

(CPM) 6.3.4.1 Original Source reading date t= yr 6.3.4.3 Expected Source Reading (137Cs) (CPM) 6.3.5.1 Corrected Scaler source reading within 15% of expected (137Cs) yes/no 6.3.5.2 Panel meter within one minor divisinn of scaler yes/no __ yes/no 6.3.5.3 Recorder within one minor division u scaler ._ (CPM) 6.3.6.1 Required Alert Setpoint 6.3.6.4 "As Observed" Alert Setpoint .(CPM) 6.3.6.1 Required High Alarm Setpoint (CPM) 6.3.6. "As Observed" High Alarm Setpoint (CPM) 6.3.6.6 Observed alert and h0;h setpoint within plus 0, minus one minor scale divistri of required setpoint. Alert yes/no High Alarms yes/no

6. 3.6.8.1 " As Found" Alert Setpoint (CPM) 6.3.6.8.2 "As Found" High Alarm Setooint (CPM) 6.3.6.8.2 "As Found" setpoints within plus 0, Minus one minor scale division of observed alert

_yes/no High Alarm yes/no 6.3.7.1 Observed increase in reading due to check source _(CPM) Recorder Trace Marked yes/no ACCEPTANCE CRITERIA: All yes/no blanks indicate "yes". Performed by Date Approved by Date 228 332 24.0

I 2322 ~R3 l1 Revision 1 01/04/78 TABLE NO. 1 UNIVERSAL DECAY TABLE NOTE: The follcwing table gives the fraction of activity of a nuclide remaining, from 0.001 half-life to 1.000 half-life. To use this table: 1. Divide elapsed tine by the half-life (t/T1 ). Time must be in 3 the same units. 2. With the answer obtained in Step ', enter appropriate row c',no the side and the column at the top. The number obtained is the fraction of original activity remaining. 3. Multiply the original activity by this figure to obtain the present activity (or the amount remaining). 133 NOTE: The half-life of Ba is 126 months. Decay 13~'Ba to the nearest month only. 133 Example: If a Ba source was cross calibrated on 4/72, what would the decay factor be on 9/74 (it has decay 29 months). 29 0.2301 T26 126l29.000 0.230 = = 25.2 3.80 3.78 .02 Checking the Universal Decay Table, one would multiply 133 the original activity of tha Ba source on 4/72 by 0.85266 to obtain the activity value on 9/74. 228 333 25.0 e

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2322-R3 Ii Revision 1 01/04/78 APPENDIX A CALIBRATION OF HP-R-219 '# RN I NG : PRIOR TO PLACING THE RMS INTERLOCK DEFEAT SWITCH CR HP-P-2!9 IN CEFEAT, PERMISSION MUST BE GRANTED BY THE SHI T SUPERVISOR' SHIFT FOREMAN, THE DEFEAT SWITCH KEY CBTAINEJ FRCM THE :HIF T FC' REMAN, AND ENTRY MADE IN THE CONTROL ROOM LCr. A.l.0 TEST SETUP 1.1 Info rr: Shif t Supervisor of work to be accomolishe.l. 1.2 Obtain and war -up equipment. Fast rise escille ape, pulse generator (low output impedance), DVM and scaler ire needed. 1.3 Turr, e pplicable Bypass Switch to DEFEAT. 1.4 Turn ratemeter function switch to OPER. 1.5 Slide ratemeter from Panel 12 far enough to make :nternal c or.1ec ti ons. 1.6 For Icdine channels, place toggle switch 56 in tr e DIFFERENTIAL position. Green Failure Light should be ON. A.2 0 DISCRIMINATOR VOLTAGE ADJUSTMENT 2.1 Open 15V link and signal link to the detector (lccated at rear of Penel PRF). 2.2 For Iodine channels, place tcggle switch on the caalyzer board in tne iS position. Green Failure Light e,hould go 0FF. 2.3 Connect acilloscope ground lead to ratemeter chassis. Cornect signal lead to ratemeter function switch blue wire (front deck, terminal No. 12). 2.4 Connect pulse o enerator ground lead to ratemeter chassis. Connect signal 1 *ad to ratemeter function switch blue wire. [ Set up the pulse generator as folicws: 228 336 28.0 2

i 232?_- R 3 I i Revision 1 01/04/78 Repetition rate - Approximately 10,000 pps Polarity - negative pulse Pulse Width - 1 u sec. Amplitude - refer to applicable Calibration Data Sheet in the Victoreen Technical "anual, " ISOTOPIC CALIBRATION TEST REPORT". This voltage is identified as " CLIP". NOTE: Set this voltage as accurately as possible using the oscilloscope. 2.5 Adjust Discriminator Adjust potentiometer R3 on the log ratemeter board until the ratemeter just begins to count. 2.6 Disconnect pulse generator and oscilloscope and reconnect 16V and signal links for the detector. A.

3.0 BACKGROUND

MEASUREMENT 3.1 Connect scaler input, using high impedance probe (Section 5.5) to binary of log ratemeter board (842 30) hatween R13 and R16 or between Rl8 and R14. Connect sca'er ground lead to ratemeter chassis. 3.2 Reset scaler to zero and count for 10 minutes. Mul tiply binary counts obtained by 2 and divide by 10 to obtain CPM. Record this value for later use. A.4.0 CALIBRAT!ON SOURCE MEASUREMENT 4.1 Determine the calibration source to be used as follows: H'>- R-219P 137Cs (No. 177) HP-R-219I 133Ba (No. 177) HP-R-219G 137Cs (No. 177) 29.0 228 337 1

3 2322-R3 l~ Revision 1 01/04/78 4.2 Refer to " CAL. SOURCE DATA" section of the Victoreen Technical Manual. Connect calibration source per applicable illustration. 4.3 Reset scaler to zero and count for 2 minutes. Record CPM for later use. A.5.0 CALCULATION OF EXPECTED AND REQUIRED CPM 5.1 Refer to "ISOTGPIC CALIBRATION TEST REPORT" section of the Victoreen Technical Manual. Use the cpplicable Calibration D'ata Sheet to determine origina. CPM for the calibration source in the sampler and original date. (For Iodine channels, use " Gross Counting Position" data). NOTE: Determine decay time to the nearest month and use Table No. 1 to determir.e current " expected" CPM. Add the background counts obtained in Section A.3.0 to determine " required" CPM. Record " expected" and " required" CPM for later use. A.6.0 HIGH VOLTAGE CORRECTION 6.1 Alternately adjust high voltage (using High Voltage Adjust Potentiometer Ril5 on the Power Supply Board) and take 0.2 minute scaler runs until measured CPM readings are repeatable wl in + 3% of the " required" CPM from Section A.5.0. Take a 2 minute scaler run to verify results. CAUTION: DO NOT EXCEED 1400 VDC. 6.2 Remove calibration source and take a 10 minute background run to ensure that H.V. adjustments have not altered backgreurd CPM enough to invalidate the + 3% agreement. i 30.0 228 338

I 2322-R3 }: Revision 1 01/04/78 A.7.0 ANALYZER BOARD ADJUSTMENT (ICDINE CHANNELS ONLY) 7.1 Adjust the analyzer board in accordance with Apcendix B. A.8.0 LOG RATEMETER BOARD CALIBRATION 8.1 Open 16V and signal links at rear of Penel 12. 8.2 For Iodine Chr.nnels, ensure S6 is in the INTEG2AL position. ~ 8.3 Adjust the "ero Set Potentiometer R36 until the panel meter reads appr;ximately 1/4" below the 10 CPM mark. 8.4 Connect,ulse generator ground lead to ratemeter chassis. Connect signa' lead to function switch blue wire. 8.5 Connect oscilloscope gratind lead to ratemeter chassis. Connect signal lead to function switch clue wire. 8.6 Set pulse generator as follows: Repetition Rate: 10 cpm Amplitude: 1 volt Pulse Width: I u sec. Pulse Polarity: Negative (-) NOTE: The scaler should be used to ensure nraper setting of the pulse generator throughout this section. Connect ground lead to ratemeter chassis. Connect signal lead to function switch blue wire. 8.7 Adjust the output control R38 until the metcr reads 10 CPM. 8.8 Adjust the pulse genarator repetition rate to 10 C P. '. 3 8.9 Slighty adjust the zero control R36 until the meter reads 10 CPM. 6 8.10 Adjust the pulse generator recetition rate to 10 CPM. 31 o 228 339.

4 I 2322-R3 Revision 1 01/04/78 6 6 8.11 Adjust C19,10 CPM control until the meter reads 10, Due to the interaction it may be necessary to switch betweer. 3 5 6 10 , 10 and 10 several times, adjusting their respective controls until the optimum span is achieved. 6' 8.12 Decade all ranges frcra 10 through 10

nsure proper spanning.

8.13 Adjust the pulse generator for a one (: Jz pui,se repeti tion s rate and check Log Ratemeter for proper operation, the reading sbould fall on the Black " Cal" mark a 6x10 CPM. 8.14 Connect oscilloscope to the junction of R39 and R40, which is the output of the calibration oscillation. 8.li Adjust calibration frequency control R45 for 1 usec bet'..een pulses. 8.16 Turn the function switch to the " Cal." position. The meter indication should be on the " Cal." mark of the scale. A.9.0 A_'~ ARM BOARD CALIBRATION 9.1 F.eset the pulse generator for zero amplitude. 9.2 Set R205 and R214 to the extreme clockwise position. 9.3 Adj ist R234 until both alarms (Hic and Alert) energize, then slowly back off until one or both just de-energize. 9.4 Set R205 and R214 to the extreme counter-clockwise position. 9.5 Set the Pulsa Generator for. 5 Repetition Rate: 10 CPM Amplitude: 1 volt Pulse Pci arity: Negative (-) P"Ise Width: 1p sec. 9.6 Decrease in a clockwise direction the settings of R205 (High) and R214 (Alert) alarm set-point controls until alarms energize. 32.0 '? 7 0 7 d [I e

4 2322-R3 I ~ Revision 1 01/04/ 7E 9.7 Decrease the repetition rate of tne signal generator slightly to de-energize the alarm (s) then sicwly increase, noting that the alram(s) energize at precisely 10 CPM on the meter scale. 9.8 set the signal generator for a count rate below the alarm set-point to de-energize the alarms. 9.9 Switch the Function Selector to the " CAL" posi tfon. 9.10 Depress the frcot panel pushbutton for the HIGH and ALERT alarms alternately, and adjust R209 (High) and R229 (Alert) alarms meter calibration control for a meter reading of exactly 5 10 CPM on the scale. 9.11 Due to slight loading effects, it may be necessary to repeat Steps 5 through 10 for optimum calibration of the alarms. 9.12 To make ALARM SET POINT adjustments, proceed as follows: a. Reset the input signal generator to zero amplitude. b. Switch the Function Selector to the " CAL" position. c. Depress the HIGH alarm pushbutton and adjust the High alarm setpoint control (R205) until the meter indicates the desired CPM on the scale. d. Depress the ALERT alarm pushbutton and adjust the Alert alarm setpoint control (R214) until the meter indicates the desired CPM on the scale. e. The HIGH and ALERT alarm adjustments are complete. 33.0 e

I 5 2322-R3 Revision 1 01/04/78 APPENDIX B ADJUSTMENT OF ANALYZER CIRCUIT BOARD (ICDINE CHANNELS ONLY) WARNING: PRIOR TO PLACING THE RMS INTERLOCK DEFEAT SWITHC FOR HP-R-219 IN DEFEAT, PERMISSION MUST BE GRANTED BY THE SHIFT SUPERVISOR / SHIFT FOREMAN, THE DEFEAT SWITCH KEY OBTAINED FROM THE SHIFT FOREMAN, AND ENTRY MADE IN THE r0NTROL ROOM LOG. B.l.0 TEST SETUP 1.1 Disconnect detector 16V and signal links at the rear of Panel 12. 1.2 Ensure toggle switch on the analyzer board is in the GROSS posi ti on. B.2.0 PRELIMINARY WINDOW ADJUSTMENT 2.1 Connect voltmeter negative lead to the junction between R313 and R312 on the analyzer board. Connect positive lead to ratemeter chassis. Adjust R313 for +3 volts + 0.1 volt on the meter. 22 Connect voltmeter negative lead to the junction between R323 and R324. Connect positive lead to ratemeter chassis. Adjust R323 for +5 volts + 0.1 volt on the meter. Remove the meter. B.3.0 UFPER AND LOWER WINDOW ADJUSTMENT 3.1 Place the toggle switt h on the analyzer board in the. analyze mode position (Down). 3.2 Connect pulse gene ator ground lead to ratemeter chassis and signal lead to blue wire of function switch. Set pulse generator as follows: 220 34.0

4 1 2322-R3 l I Revision 1 01/04/73 Repetition Rate: Approximatelv 2000 pps. Polarity (Pulse): Negative (-). Pulse Width: 1 a sec. Amplitude: less than 1 volt. 3.3 Connect oscilloscope ground lead to ratemeter chassis and ~ signal lead to the junction of C310 and C304 on the analyzer board. 3.4 Adjust the pulse generator amplitude for a positive pulse of +3.8 volts peak on the scope. NOTE: Adjust this voltage as accurately as possible. 3.5 Adj >st the lower level control, R313, until a countrate is observed. Then adjust R313 upward (more nerative) until the countrate stops, then turn back until the countrate just returns. .6 Reset the pulse generator amplitude foi' a positive pulse of +4.2 volts peak on tne scope. NOTE: Adjust this voltage as accurately as possible. 3.7 Adjust the upper level control, R323, until a countrate is observed. Then adjust R323 downward (less negative) until the countrate stops, then back until the countrate just returns. 3.3 The window nas now been set for a width of approximately 0.4 volts with a mean height of 4.0 volts. 3.9 Disconnect the pulse generator. B.4.0 ADJUSTMENT OF LINEAR AMPLIFIER GAIN TO CENTER Ba PULSE IN THE WINDOW 4.1 Reconnect detector to ratemeter by closing +16V and signal links. 22830E 35

i i 2322-R3 I I Revision 1 01/04/78 4.2 Attach 13"'Ba (No. 177) source to detector. 4.3 Obtain maximv.i countrate on panel meter by adjus ting gain controls as fol'o.vs: Set Fine Gain Ccatrol (R334) to the center of its range. While observing the panei meter, vary the Coarse Gain [ Control (R307) slowly to achieve maximum CPM on the ratemeter; then optimize by adjusting the Fine Gain Contros (R334). NOTE 1: The oscilloscope should be used as an aid in 133 centering the 356 Kev Ba pulse in the 33 window. Of the three Ba pulses which are produced, the 356 Mev pulse is the one with the highest voltage magnituce. Gain is adjusted so that the magnitude of this pulse is 4.0 volts at the window. NOTE 2: While adjusting the Fine Gain Control R334, use the oscilloscope to determine which direction of rotation DECREASES the gain. This information will be used in the next step. NOTE 3: 0.2 minute scaler runs should be used in conjunction with gain adjustments to determine when maximum CPM has been achieved. B.5.0 ADJUSTMENT OF LINEAR AMPLIFIER GAIN TO CENTER IODINE PULSE IN THE WINDOW NOTE: The gain of the linear amplifier will now be readjusted so that iodine pulses will be centered in the window. ~ Since the energy of Iodine is slightly higher than 133 for Ba, it will be necessary to decrease the gain settings that were made in the last step above. 228 344 36.0 f

3 2322-R3 ) Revision 1 01/04/78 5.1 Rezero the scaler and run a two minute count. Record this value for later use. 5.2 REDUCE gain slightly using control R334 and run another 2 minute count. Repeat this step until count rate is 7% less than that recorded for Step 5.1. NOTE _: Any change in the setting of R334 will cause a decrease in countrate. It is important that the 7% decrease be obtained by reducing the gain and not by increasing it. 5.3 Iodine pulses are now centered in the window. e 37.0 228 34E _ _}}

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