ML20352A232
| ML20352A232 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 11/02/2020 |
| From: | La CrosseSolutions |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML20356A041 | List:
|
| References | |
| LC-2020-0023 LC-RP-PR-060, Rev 1 | |
| Download: ML20352A232 (25) | |
Text
~
LACROSSESOLUTJON,S LACBWR Site Restoration Project Work Control Procedure Calibration and Initial Set-Up of The 2350-1 Procedure No. LC-RP-PR-060 Revision No. 1 Preparer (Print name/Sign)Marc Lanni ~
Date:
Secondary Reviewer (Print Name/Sign ~ ?Ji.
Scott Zoller) ff::;;?;
Date: ~ ~/ i
'A c::-7
/ rv Regulatory Affairs assigned program & regulatoryl{eviews (*new only*): Initials/Date _
N/A _
Regulatory Required Reviews (attach completed LC-RA-PR-001 and QTR forms, as applicable)
Part 50 License: 10 CFR 50.59 and 50.90 0 YES
[8] NO Fire Protection: 10 CFR 50.48(t) 0 YES
[8] NO Conditions of License: PSP: 10 CFR 50.54(p) 0 YES
[8] NO Conditions of License: E-Plan: 10 CFR 50.54(q) 0 YES
[8] NO Termination of License: 10 CFR 50.82(a)(6) and 50.82(a)(7) 0 YES
[8] NO Part 72 License: IO CFR 72.48 0 YES
[8] NO Program Required Reviews RP:
[8] YES O NO QA: 0 YES [8] NO
~
°::7C-,~~$Y.,.e:::::::i...~
-DATE: 0~
_ DATE:. ____ _
QTR: 0 YES [8] NO SIGNATURE _ ____ _______
_ DATE: _
Approval Section PROJECT MANAGER:
Effective Date: *2>11 \\ I I c, (assigned by Document Control or Project Manager)
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 2 of 25 Table of Content
- 1.
PURPOSE AND SCOPE......................................................................................................... 4 1.1.
Purpose............................................................................................................................. 4 1.2.
SCOPE............................................................................................................................. 4
- 2.
REFERENCES........................................................................................................................ 4
- 3.
GENERAL............................................................................................................................... 4 3.1.
Responsibilities................................................................................................................ 4 3.2.
Definitions........................................................................................................................ 5 3.3.
Acronyms......................................................................................................................... 6 3.4.
Precautions, Limitations, and Prerequisites..................................................................... 6 3.5.
Records............................................................................................................................. 8
- 4.
Procedure................................................................................................................................. 9 4.1.
2350-1 Initial Receipt Inspection..................................................................................... 9 4.2.
Calibration........................................................................................................................ 9 4.3.
Threshold and window calibration................................................................................. 10 4.4.
High Voltage Calibration............................................................................................... 12 4.5.
Overload Test................................................................................................................. 12 4.6.
Reproducibility Test....................................................................................................... 13 4.7.
Linearity Check.............................................................................................................. 14 4.8.
Alarm Checkout............................................................................................................. 14 4.9.
Detector Setup................................................................................................................ 16 4.10.
High Voltage Determination...................................................................................... 17 4.11.
Dead Time Determination.......................................................................................... 19 4.12.
GFPD, NaI, Scintillation and Geiger Muller Detector/Setup..................................... 20 4.13.
Calibration Completion.............................................................................................. 21
- 5.
Attachments........................................................................................................................... 21 5.1. Calibration Certificate............................................................................. 21 5.2. Detector Parameter Sheet........................................................................ 21 5.3. Instrument setup Data example............................................................... 21 5.4. Instrument Control Chart Example.......................................................... 21
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 3 of 25 Summary of Changes:
- 1. Minor formatting and grammatical changes that did not affect the technical content of this document.
- 2. Added weather requirements for Ludlum 43-37 and other gas flow proportional counters.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 4 of 25
- 1. PURPOSE AND SCOPE 1.1.
Purpose 1.1.1 This procedure provides instructions for calibration, determining instrument efficiency and establishing response checks criteria for the Ludlum Measurements, Inc. (LMI) Model 2350-1 Data Logger with associated detectors and accessories at LaCrosseSolutions LACBWR Station.
1.2.
SCOPE 1.2.1 This procedure applies to Radiological Protection (RP) Instrument personnel who maintain the Ludlum Model 2350-1 Data Loggers.
- 2. REFERENCES 2.1.
Ludlum Model 2350 Instruction Manual 2.2.
Ludlum Model 44-116 and 44-10 Instruction Manual 2.3.
NUREG-1575, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) (Revision 1), {EPS 402-R-97-016, 2002 2.4.
ISSO-7503-1, Evaluation of Surface Contamination, 1988 2.5.
NUREG 1757 Consolidated Decommissioning Guidance, Volume 2, Revision 1, Characterization, Survey, and Determination of Radiological Criteria, 2006.
- 3. GENERAL 3.1.
Responsibilities 3.1.1 Radiological Protection Supervisor (RPS) 1.)
Manages the RP Instrument Program 3.1.2 Radiological Protection (RP) Instrument Technicians 1.)
Performs calibration and instrument source checks on portable RP instruments.
2.)
Receives instruments and sources.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 5 of 25 3.)
Establishes and provides oversight for the issue, control, and accountability of survey instrumentation.
4.)
Notifies the RPS or RPM of instruments that fail the initial response test.
5.)
Ensures deviations from standards are noted on the detector response forms.
6.)
Performs initial instrument receipt response tests and associated detectors to ensure operability.
7.)
Ensures all RP instrument original packing slips and documents received at the site are forwarded to the RPS.
8.)
Ensures performance of initial receipt response test and documentation of survey instruments.
9.)
Establishes detector setups and groups to be implemented.
3.1.3 RP Technicians (RPTs) 1.)
Tag and segregate malfunctioning or out of calibration equipment.
3.2.
Definitions 3.2.1 Calibration - Setting the response or reading of an instrument relative to a series of conventionally true values traceable to the National Institute of Standards and Technology (NIST).
3.2.2 Counting Efficiency - The net number of counts registered by the detector system per unit time divided by the number of disintegrations originating in the radioactive source that is being measured during the same unit of time.
3.2.3 Data Logger - (Ludlum Measurements Model 2350 Series Data Logger).
The base electronic unit, which controls detector parameters, stores user information, and collects data.
3.2.4 General Maintenance - Activities allowable on instruments without requiring recalibration. These include light cleaning, battery and cable change outs, Mylar window replacements and repair, and other similar activities that do not impact the instruments response.
3.2.5 Instrument Efficiency (Ei) - The ratio between the instrument net reading and the surface emission rate of a source under given geometrical conditions.
This is also referred to as the 2 efficiency.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 6 of 25 3.2.6 Surface Efficiency (Es) - The ratio between the number of particles of a given type above a given energy emerging from the front face of a source or its window per unit of time (surface emission rate) and the number of particles of the same type created or released within the source (for a thin source) or its saturation layer thickness (for a thick source) per unit of time.
3.2.7 Total Efficiency (Et) - The net number of counts registered by the detector system in a specific geometry per unit time divided by the number of disintegrations originating in the radioactive source being measured during unit of time. Total Efficiency (Et) is equal to Detector Efficiency (Ei) multiplied by the applicable Surface Efficiency (Es) 3.2.8 Surface Emission Rate of a source (q2) - The number of particles of a given type above a given energy emerging from the front face of the source per unit time.
3.2.9 Response Check - A process whereby an instrument or detector is evaluated against established criteria to verify satisfactory operation.
3.3.
Acronyms 3.3.1 GM - Geiger Mueller 3.3.2 HV - High Voltage 3.3.3 LC - Location Code 3.3.4 LMI - Ludlum Measurements, Inc.
3.3.5 NaI - Sodium Iodide 3.4.
Precautions, Limitations, and Prerequisites 3.4.1 Precautions 1.)
Data Logger A.
Change batteries when battery voltage drops below 5 volts, as continued operation may result in loss of data.
B.
Instrument memory will be lost if the batteries are removed for more than 30 minutes.
C.
Performing a COLD INITIALIZE [SSR] will delete all detector parameters and any logged samples in memory.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 7 of 25 D.
Ensure the ON/OFF switch is in the OFF position before plugging or unplugging devices from the Data Logger; otherwise, damage to the instrument or device could occur.
2.)
Detectors A.
Use care to avoid damaging Mylar ' windows. This will reduce efficiency and increase light sensitivity B.
Prior to connecting any detector to the Data Logger, ensure High Voltage (HV) and detector parameters are appropriate. For the Model 2350-1, the command [RH] reads the high voltage, and [RD] reads the current detector number.
3.4.2 Limitations 1.)
All forms described in this procedure may be generated electronically. If electronic forms are used, the physical layout of the form may be modified provided the intent described in this procedure is not changed.
2.)
Computer generated equivalent attachments may be used.
3.)
Default surface efficiency values provided in ISO-7503-1 Reference 2.6 are used and are acceptable to the NRC as based on NUREG-1757, Vol 2, Revision 1 4.)
This procedure may be performed in part or in whole 5.)
Data Logger A.
The Data Logger is due for calibration every 12 months or following any repair or maintenance that may affect calibration. When possible, available detectors should be calibrated at the same time as the instrument. However, detectors may be calibrated separately without the need to re-calibrate the Data Logger provided that the Data Logger calibration has not lapsed.
B.
The Data Logger is limited to the set up parameters for sixteen detectors. If more than 16 detector setups are required for a project, more than one approved setup group may be required.
C.
Spaces are not generally used in commands. However, the recycle command [SQX-X-X-X] requires a space between the parameters.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 8 of 25 6.)
Detectors A.
Detectors which fall outside the accepted criteria shall be tagged Out OF Service and segregated for further evaluation. Report this to the RPS.
B.
Pipe monitor detectors are response tested for a specific pipe diameter to be measured.
3.4.3 Prerequisites 1.)
The Data Logger and detectors shall be calibrated and initially setup by RP Instrument Technicians.
2.)
Initial Receipt Response Test should be performed prior to initial use and to the extent practical, under conditions and geometries representative of field conditions expected to be encountered.
3.)
The Data Logger should have its serial number programmed into its memory.
4.)
Required Equipment/M&TE A.
Ludlum 2350-1 Data Logger B.
Ludlum 500-2 Pulse generator or equivalent C.
Over range simulator box or 100 mega ohm resistor D.
Proper hand tools E.
Calibration Label F.
NIST traceable sources 3.5.
Records 3.5.1 - Calibration Certificate 3.5.2 - Detector Parameter Sheet 3.5.3 - Instrument Setup Data Example 3.5.4 - Instrument Control Chart Example
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 9 of 25
- 4. Procedure 4.1.
2350-1 Initial Receipt Inspection 4.1.1 Perform pre-operational checks and notify the RPs or RPM of any deficiencies.
4.1.2 Turn ON the instrument with no detector attached and verify the Memory and CPU Tests display on the startup.
4.1.3 Verify battery voltage is greater than 5 volts.
4.1.4 Set the time and date in the 2350-1.
4.1.5 Load detector-operating parameters to match the setup groups approved by the FSS Supervisor.
4.1.6 Verify all detector parameters saved in the 2350-1 are appropriate for each detector expected to be used.
1.)
Change any parameters that may conflict with the calibration information.
2.)
Perform a detector set up per the applicable section of this procedure.
3.)
Document the detector change and verification in the instruments history log.
4.2.
Calibration 4.2.1 Perform an inspection of the physical condition of the instrument.
1.)
If any unsatisfactory condition is found, then tag the instrument Out Of Service.
4.2.2 Change the batteries before starting calibration.
NOTE The calibration parameters are found with the Ludlum 2350-1 Detector Calibration Data Sheet (Detector Setup Report) supplied by the vender or site Instrument Department.
NOTE Following the initial detector setup, the detector may be used with only the 2350-1 instrument that was used for initial set up and calibration.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 10 of 25 4.2.3 Ensure the 2350-1 is in the Off position and disconnect any detectors.
4.2.4 Plug the keypad terminal into the 2350-1 4.2.5 Turn ON the instrument and verify the following start-up screens appear:
1.)
Display turns blue for about two seconds.
2.)
Memory and CPU Test screens display with the test results as OK.
3.)
Battery voltage is displayed for approximately two seconds.
4.)
Display changes to a normal screen that was the last screen active prior to the 2350-1 being turned OFF.
4.2.6 Check internal serial number using the command [REN] ENTER the serial number will be displayed on the computer screen.
1.)
If the serial number requires correction, then enter [SNExxxxxx ENTER where xxxxxx is the 2350-1 serial number.
4.2.7 Enter [SVD1] to display the parameters display.
4.2.8 Check the date, time, and reset, if necessary.
1.)
If the date and/or the time requires correction, then enter [SDMM/DD/YY]
for the corrected date and [STHH:MM] for the corrected time.
4.3.
Threshold and window calibration 4.3.1 Change to Detector 15 [D15], (detector location is not currently used for any detector setup and therefore, will not contain as left parameters).
4.3.2 Verify and/or set the following parameters [SVD2]:
1.)
Set display unit to counts [SU7].
2.)
Set multiplier to auto [SM0].
3.)
Set time base to minutes [SB1].
4.)
Set window to OFF [WOFF].
5.)
Set High Voltage to Zero [H0].
6.)
Set Dead Time to Zero [SL0].
7.)
Set Calibration Constant to One [SC1].
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 11 of 25 8.)
Save Parameters [SP15].
9.)
Verify changes [Y or N].
10.)
Change 2350-1 to alarm Display [SVD3].
11.)
Set Scaler Alarm to 1E6 [K1E6].
12.)
Set Rate Meter Alarm to 1E9 [J1E9].
13.)
Set Rate Meter low alarm to Zero [SVC0].
14.)
Change 2350-1 to main display [SVD1].
4.3.3 Turn OFF the 2350-1 prior to connecting the Pulser.
4.3.4 Set LMI 500-2 pulser, as follows:
1.)
Set Polarity to NEG.
2.)
Set Amplitude to <-10mV.
3.)
Set pulse to 400,000 cpm using the course and fine controls, as necessary.
4.)
Connect the pulser to the 2350-1 using the same cable length that is 25 ft.
4.3.5 Turn ON the 2350-1.
4.3.6 Set the threshold to 100 {-10mV} [T100]
4.3.7 Vary the pulser amplitude to approximately +/- mV to obtain a reading of approximately 300,000 on the 2350-1.
1.)
Record the As Found Threshold value on Attachment 2, Calibration Data Sheet.
4.3.8 Ensure the As Left threshold values are within +/-10% {-9 to -11 mV}.
1.)
If no adjustments are required, then record As Found results as As Left on Attachment 1.
4.3.9 If adjustments are necessary, then use potentiometer R-10 and repeat Steps 4.3.4 through 4.3.7.
1.)
Record As Left values on Attachment 1.
4.3.10 Set the window to 100 [W100] and turn the window ON [WON].
4.3.11 Set the threshold to 100 {-10mV} [T100].
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 12 of 25 4.3.12 Adjust the pulser amplitude from below -10mV, then to above -20mV and verify the following:
1.)
Rate meter count decreases rapidly.
2.)
Bar graph decreases.
3.)
No audible clicks from speaker.
4.3.13 Turn the window OFF [WOFF].
4.3.14 Record the window operation on the Attachment 2 as either SAT or UNSAT.
4.4.
High Voltage Calibration 4.4.1 Set the HV to 500 volts [H500] and record the As Found value. The required value is 500 +/- 10 volts.
4.4.2 Set the HV to 1200 volts [H1200] and record the As Found value. The required value is 1200+/- 20 volts.
4.4.3 Set the HV to 2000 volts [H2000] and record the As Found value. The required value is +/- 50 volts.
4.4.4 If any As Found value is out of tolerance or additional accuracy is desired, then perform the following:
1.)
Open the instrument case.
2.)
Set the HV to 1200 volts [H1200].
3.)
Adjust HV potentiometer (R52) on the main board to obtain a voltmeter reading of 1180 to 1220 volts.
4.)
Repeat steps 4.4.1 through 4.4.3 and record the values as the As Left values.
4.4.5 Set the HV on the 2350-1 to zero [H0].
4.4.6 Disconnect the pulser from the 2350-1 and close the instrument case.
4.5.
Overload Test 4.5.1 Connect the overload simulation resistor (100 M) to the detector connection of the 2350-1.
4.5.2 Turn the overload protection ON [OON].
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 13 of 25 4.5.3 Set the high voltage to 1500 vdc [H1500].
4.5.4 Set the overload to 150 [7.5 µA] [O150].
4.5.5 Verify the top line on the display alternates between meter reading and OVERLOAD NOTE
[H1E3] must be used to set the high voltage to 1000 volts dc.
4.5.6 Set the high voltage to 1000 vdc [H1E3].
4.5.7 Set the overload to 100 {5 µA} [O100].
4.5.8 Verify the top line on the display alternates between meter reading and OVERLOAD.
4.5.9 Set the high voltage to 500 vdc [H500].
4.5.10 Set the overload to 50 {2.5 µA [O50)].
4.5.11 Verify the top line on the display alternates between meter reading and OVERLOAD.
1.)
If the indication does not alternate for each voltage, then use OVLD potentiometer R-7 to adjust and repeat Steps 4.5.3 through 4.5.11, as necessary.
4.5.12 Enter the overload test results as SAT or UNSAT on Attachment 2 and indicate if adjustment was required.
4.5.13 Turn the overload protection to OFF [OOFF].
4.5.14 Set the high voltage to 0 [H0].
4.5.15 Remove the overload simulator Resistor from the 2350-1 detector connector.
4.6.
Reproducibility Test 4.6.1 Connect the pulser to the instrument.
4.6.2 Set the pulser output as follows:
1.)
Amplitude to approximately twice the threshold.
2.)
Frequency to 1000 cpm
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 14 of 25 4.6.3 Select the normal display [SVD0].
4.6.4 Set the count time to 60 seconds. [F60].
4.6.5 Perform 3 counts [C], removing the pulse between counts.
4.6.6 If any reading is >10% different from the average counts, or the average reading is >10% different from the pulser frequency, then tag the instrument Out of Service.
4.6.7 Record the results as SAT or UNSAT on Attachment 1 4.7.
Linearity Check Note The Tolerance for Linearity Check is +/-10%.
4.7.1 Connect the pulser to the instrument.
4.7.2 Set the amplitude to approximately twice the threshold value (if T=100
{-10mV}, then set pulser to -20 mV).
4.7.3 Set pulse to 400,000 cpm.
4.7.4 Select the normal display [SVD0].
4.7.5 Set the count time to 60 seconds [F60].
4.7.6 Obtain a 1-minute count [C] and record the result.
4.7.7 Repeat steps 4.7.3 through 4.7.6 for the following count rates:
1.)
40,000 cpm 2.)
4,000 cpm 3.)
400 cpm 4.)
If the readings are not within tolerance (+/-10%), then tag the instrument Out of Service for repair.
4.7.8 Record the As Left results on Attachment 1.
4.8.
Alarm Checkout
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 15 of 25 4.8.1 Set the 2350-1 to the Main Screen [SVD0].
4.8.2 Set the count time to 90 seconds. [F90].
4.8.3 Connect the pulser to the 2350-1.
4.8.4 Enter [SE7] to display all counts on the display screen.
4.8.5 Enter [SID1] to turn the Integrated Dose Counts ON.
4.8.6 Set the pulser as follows:
1.)
Set the amplitude to twice the threshold value (if T100 {-10mV}).
2.)
Set the pulser to -20mV.
3.)
4.8.7 Set the integrated dose alarm to 1000 [P1E3].
4.8.8 When the alarm sounds, silence the alarm by pressing the acknowledge button.
4.8.9 Zero the integrated dose [SIZ]. (Counting will start and should alarm when line 5 of SVD0 reaches 1000 counts).
1.)
When the alarm sounds, press the acknowledge button to silence the alarm.
4.8.10 Set the Scaler alarm to 1000 counts [K1E3].
1.)
Start counting [C]. When line 3 of SVD0 reaches 1000, the 2350-1 should alarm.
2.)
When the alarm sounds, press the acknowledge button to silence alarm.
4.8.11 Adjust the pulser to less than 1000 cpm.
4.8.12 Set the rate meter alarm to 1000 [J1E3].
4.8.13 Raise the pulser output from 1010 to 1025 cpm. When line 1 of SVD0 reaches 1000 the 2350-1 should alarm.
1.)
When the alarm sounds, press the acknowledge button to silence the alarm.
4.8.14 Verify the display alternates between ALR (alarm) and the following:
1.)
RAT 2.)
SCL
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 16 of 25 3.)
DOS 4.8.15 Increase the alarm levels to avoid alarms during the remainder of the calibration, as follows:
1.)
Enter [J1E9] to reset rate alarm (RAT).
2.)
Enter [K1E6] to reset scaler alarm (SCL).
3.)
Enter [P1E9] to reset integrated dose alarm (DOS).
4.)
Enter [SID0] to turn OFF the integrated Dose Counter.
5.)
Enter [SIZ] zero the Integrated Dose Counter.
6.)
Enter [SVD1] to change 2350-1 to Normal Display.
7.)
Enter [SE3] to turn OFF the Integrated Dose Display.
8.)
Enter [X] to reset all alarms.
4.8.16 Record alarm results as SAT or UNSAT on Attachment 1.
4.9.
Detector Setup 4.9.1 Obtain the previous Calibration Certificate, (Attachment 1) and Detector Parameter Sheet, (Attachment 2 or equivalent) for the detector under calibration and transfer the previous As Left parameters to the new sheet, except when performing the initial calibration.
4.9.2 Select the desired detector number [Dxx].
4.9.3 Change screen to [SVD2] and record the As Found parameters column on.
4.9.4 Verify the previous As Left parameters match the present As Found parameters on Attachment 2 (Alarm set points excluded).
1.)
If the parameters do not match, then notify the RPS.
4.9.5 Change the Alarm Display [SVD3] and record the overload setting under As Found. For new detectors, record the following information, as a minimum:
1.)
Detector Model [M]
2.)
Detector Serial Number [N]
3.)
Threshold [T]
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 17 of 25 4.9.6 Save the parameters [SPxx] if a parameter was changed/set.
4.10. High Voltage Determination NOTE Prior to starting the high voltage determination for any detector, refer to the information in Table 1 for guidance on the starting voltage and threshold settings. These starting points are picked at a point below the plateau allowing a quicker plateau determination. Other starting points may be chosen based on the response of old detectors and experience. The end voltage shall not be exceeded.
TABLE 1 Detector Model Numbers Start HV Settings End HV Settings Threshold Settings 43-68 (alpha) 1100 1500 100 43-68 (beta) 1600 1900 100 44-10 (Gamma) 700 1100 200 43-37 (beta) 1600 2000 100 43-51 (beta) 1600 1900 100 43-116-1 (beta) 1500 1900 100 43-111 (beta) Pipe 1600 1900 100 44-157 (Gamma)
Pipe 800 1200 200 43-98 (beta) Pipe 1600 1900 100 44-159 (Gamma)
Pipe 800 1200 200 43-94 (beta) Pipe 1500 1800 100 4.10.1 Turn OFF the 2350-1 and connect to the detector using the dame length cable as will be used in the field.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 18 of 25 4.10.2 Turn ON the 2350-1 and select the detector display [SVD2]. Verify and/or set the following parameters:
1.)
Set units to counts [SU7].
2.)
Set multiplier to auto [SM0].
3.)
Set time base to minutes [SB1].
4.)
Set dead time to zero [SL0].
5.)
Set calibration constant to one [SC1].
6.)
Ensure window is OFF [WOFF].
7.)
Set count time to 60 seconds [F60].
8.)
Save Parameters [SPxx], where xx is the detector setup number.
9.)
Ensure overload is OFF on alarm display [SVD3] [(OOFF)].
4.10.3 Place the detector in the jig with no source present to perform Background Plateau.
Caution GFPD detectors used in extreme temperature variations (<40º F and
>100º F) require separate calibrations and response check ranges. The instruments shall be source checked at the temperature of operation.
Ensure that any GFPD used in extreme temperature conditions (<40º F and >100º F) is calibrated for use under these conditions. Generally, a new set of response ranges will need to be archived as the unit will respond lower in colder temps and higher in hotter temps. Detectors calibrated at different temperatures will be labeled as such.
4.10.4 Select the high voltage ramp routine [SHR1].
4.10.5 No prompt will be provided, press [Y].
4.10.6 When the 2350-1 prompts, PROCEED W/HV press [N] to input the parameters for the detector being calibrated.
4.10.7 Enter the starting voltage appropriate for the detector being calibrated from Table 1 Example [1600].
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 19 of 25 4.10.8 Enter the ending voltage appropriate for the detector being calibrated from Table 1 Example [1900].
4.10.9 Set the incremental voltage value for the ramping routine to 25 volts [25] or other appropriate value.
4.10.10 Type [C] to start the ramping routine.
4.10.11 Record scaler count for each voltage and document on Attachment 2, Detector Data Sheet under Background.
4.10.12 When routine is complete, the 2350-1 will prompt SAVE? HV = xxxx, press [N ENTER].
4.10.13 Remove the detector from the jig, add the source and detector, and repeat Steps 4.10.5 through 4.4.13 for the determination of the source plateau.
1.)
Record the results on the Attachment 2 under Source.
4.10.14 Establish a source versus background plateau, rather manually utilizing log paper or with the Excel spreadsheet for operating voltage determination.
1.)
Ensure the operating voltage has minimal contribution from background.
4.10.15 Record the As Left High Voltage on the Attachment 2.
4.10.16 Enter the selected HV operating point [Hxxxx] and save the data [SPxx].
4.11. Dead Time Determination 4.11.1 Refer to the Ludlum Calibration manual for the 2350 for determining the dead time for all probes.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 20 of 25 4.12. GFPD, NaI, Scintillation and Geiger Muller Detector/Setup NOTE The LMI detectors covered by this section include 43-37,44-116 and 44-10. Similar detectors may be covered by this section if approved by the RPS or RPM.
CAUTION GFPD detectors used in extreme temperature variations (<40° F and >100° F) require separate calibrations and response check ranges. The instruments shall be source checked at the temperature of operation.
Ensure that any GFPD used in extreme temperature conditions (<40° F and >100° F) is calibrated for use under these conditions. Generally, a new set of response ranges will need to be achieved as the unit will respond lower in colder temps and higher in hotter temps. Detectors calibrated at different temperatures will be labeled as such.
4.12.1 Performing detector efficiency 1.)
In a low background area, obtain twenty (20) 1-minute background counts.
2.)
Place the detector on the applicable source jig and obtain twenty (20) 1-minute source counts [Q1].
NOTE For a Ludlum 43-37, the source needs to be placed into 3 different positions, to the Left, Center, then Right side of the jig to obtain the proper average.
A.
Allow NaI to stabilize for 15-30 sec, then acquire the 20 source counts.
3.)
Record the results in the applicable Detector Calibration Spreadsheet. The spreadsheet will calculate the instrument efficiencies (Ei and Et), the required averages, acceptance criteria, and the monthly control chart.
4.12.2 Complete the calibration/setup paperwork.
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 21 of 25 4.12.3 Print the spreadsheet and submit to the RPS or RPM for review.
4.13. Calibration Completion 4.13.1 Review the Calibration Coversheet and ensure all required data is documented.
4.13.2 Attach a calibration sticker to the 2350-1 and associated detectors with the Serial Number, Calibration Date, Calibration Due Date, and Technicians Initials, as a minimum.
1.)
Set the calibration due date for the 2350-1 and associated detectors to the same date.
2.)
Set the due date to the most restrictive date to ensure that a detector calibrated at a later date cannot be used with a 2350-1 that is out of calibration.
3.)
Set the calibration frequency to 1 year.
4.13.3 Sign and date as the Technician in Performed By on the data sheets.
4.13.4 Ensure the results of the calibration have been entered into the database.
4.13.5 Ensure the Data Sheets are forwarded to RPS for review.
- 5. Attachments 5.1. Calibration Certificate 5.2. Detector Parameter Sheet 5.3. Instrument setup Data example 5.4. Instrument Control Chart Example
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 22 of 25 ATTACHMENT 1 Calibration Certificate lJ!ll! Dll.11.!JJ M 23,50-1.,ea.1 i bra1iii10n Oemt ifi ratie Serial#:
Cal. Due :
Detector:
Serial#:
Cal. Due :
Reproducibility Test Test Equipment:
Serial#:
Cal. Due :
Sat (
)
Unsat (
Phycic,I Co"ditio" Sat(
) Unsat(
)
Wi... Jau Or,.:-Ml:iar.
Sat( )
Unsat( l St,rtYp T oct Sat( l Unsat( l Overload Sat( l Unsat( l Adjusted ( l Now Bottorioc Yes( l No( l Reason for Due(
) Repair(
) Out of Tolerance (
)
Alarm Sat(
) Unsat(
)
Calibration Threshold P,r,motor (mVdc)
AmplitYdo (mVdc)
Tolerance (mVdc)
As Found (mVdc)
As Left (mVdc)
High Voltage Voltage Tolerance (+/- 101/.)
As Found As Left 500v 450to550 1200v 1080 to 1320 2000v 1800 to 2200 Linearit"1' Pulser Input (cpm)
Tolerance (+/- 101/.)
As Found As Left 400,000 360,000 to 440,000 40,000 36,000 to 44,000 4,000 3,600 to 4,400 400 360to440 Detectors Detector#
Model Serial#
High Voltage Threshold De-ad Time-Cal. Constant Detector 1 44-10 Detector2 44-116 Detector3 Detector4 Detector5 Remarks:
Performed By:
Date:
Reviewed By: ________________ _
Date:
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 23 of 25 ATTACHMENT 2 Detector Parameter Sheet Reviewed by:
Date:
Detector Parameter Sheet 2350-1 Seri.al Nl!lmber length Of Cable P,arameter Previous As left As Found Detector Group Detector model#
Detector Serial ti Readout llnits Read out time Base High Voltage Window S ca I er Co1.1 nt Time Threshold Calibration Con s ant Dead Time Ra eme er Alarm Rateme er low Alarm Scaler Al.arm lntergrated Do,s,e Alarm Overload Date com pleted Remarks Preformed B,~~--~1--------------
Date ~I -----~----------------
As left
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 24 of 25 ATTACHMENT 3 Instrument Setup Examples lnstrumen.t *. etup J:n*strument Setup Z350-1 f'robe; 5-r~k~op&:
To--S3 Nl:IIIMTI. ~ Modtt ZJS0-11 Plobe:
So1,1r,o,,~ ;
Cs-137 325248 44-116 Seel I NUfTlbe..
J4-il63 S rW numbe1:
325246 44-10
~,ill rtumber:
,oowo 101-Ma!l"" 17 f'R357009
~Iii (c;lpm);
13,580 C It.. Owe O~e, 10*1"-';-17
~357i76
~:,,[dpm);
2,330.000 237 Bkg Coum: T1i-lmin.J:
Bae~rounc:I CoUlillls:
5:N6 Blc1o1 Caunt Tne (min.'!:
z:8.81/2 s-CT(inril Sc,1,1i'(lt' CT !min)!
i:,_. i;,y;
,,;ienw;r.d,;,r> w1,1r,0 Geoomeuy.
e.,-,ieredl on t'oOutoe c_,,,
Gr.;iu Col,ll'il!I' N I C<;il,,llll\\ R.al
.. !If..
COll.ll'lt Grcts Coti!'llls
~CcuniR* -,.-
~
11 3S89 3352 1
'360Cl1 316$,0 2
3470 32J3 2
3707$
31329.0
- 3 3S7-S, 3338
- 3 36513 31001.0 4
3613 338.2 4
38717 3i,m.o 5
3500 3272 5
36533 31e81.0 6
3648 34,11 6
36637 3i33t0 1'
- 3406, 3163 1
36815 J 1(36S.0 8
3842 3405 8
36754 31500.0 3661 34:30 s
38870 311324.0 I)
.3555, 3318 11 36627 3138 0 t1 3615 337a
- vi 36661 3'1S'15.0 12 3721 34434 1Z 3009/3 31453.0 13
- 3536, 3283 13 36469 31~.0 14 3&W 3407 w
J6700 316.53.0 15 3682 3445
\\S 36i61 3161$..0 16
- 3538,
- 3301 16 36401?
311S5.0 TT 3612 3:375 17 38721 31117'S,O 18
- SSSS, 3318 18 36853 31413.0 IS 3603 3366 19 364-48 31~2.0 w
3595 3358 20 38S58 31712.0 eare 3352' Me~
31460 LCL(-2CIXl:
2682 UCl.1*2CIXl 4
. LCL(*20Y.l 25,sa u:t. (+20'/.):
- 9775
LC-RP-PR-060 Calibration and Initial Set-Up of the 2350-1 Revision 1 Page 25 of 25 ATTACHMENT 4 Control Chart Data Examples MDIII ll 000 12'.Dlll lnr1m u
>>ooo 22 000
- 0.000
~
IDaily QC Source Check SN:325246 44-116
/ 7
~
/
Daily QC Source Che.ck SN:3252.46 44-10
---~
(;p..o..(
\\
\\
'\\-
~
-