Mirion Technologies Neutron Hp 10 User manual

Hp(10) Neutron Module User's Guide
Health Physics
Division
Radiation Safety. Perfected.
DOC003285EN-A

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Table of Contents
1- Presentation...........................................................3
2- General...................................................................4
2.1 Compatibility........................................................... 4
2.2 Settings................................................................... 5
2.3 Hp(10) Neutron Measurement Display.................... 5
2.4 Hp(10) Neutron Chirp Dose Increments.................. 6
2.5 Historical Data Function ......................................... 7
2.6 Handling Recommendations .................................. 7
2.7 Module Management.............................................. 8
3- Alarms ....................................................................9
3.1 Alarm Display and Conguration ........................... 9
3.2 Condence Test...................................................... 9
3.3 Fault Diagnosis and Resolution ............................ 10
4- Module Attachment .............................................11
4.1 Removing the battery cover ................................. 11
4.2 Attaching the Hp(10) Neutron Module ................. 12
4.3 Detaching the Hp(10) Neutron Module ................. 13
5- Manual Calibration & Maintenance ......................14
5.1 Principles .............................................................. 14
5.2 Manual Hp(10) Neutron Calibration ...................... 15
5.3 Maintenance ......................................................... 16
6- Technical Characteristics .....................................17
6.1 Physical Characteristics ....................................... 17
6.2 Electrical Characteristics ...................................... 18
6.3 Mechanical Characteristics .................................. 18
6.4 Environmental Characteristics.............................. 18
6.5 Factory Calibration and Verication...................... 19
6.6 Functional Characteristics .................................... 19
6.7 Environmental regulations .................................... 19
6.8 Calibration Reference Point.................................. 20
7- Verication Certicate..........................................21
8- CE Certicate.......................................................22

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Neutron detector
Module Serial
Number Connection pad
Wearing and Battery
Guidelines
Technical information
Module Serial
Number
Attachment screws
1- Presentation
The Hp(10) Neutron Module is mounted on a DMC 3000 to expand the DMC 3000’s measurement capabilities to
neutron radiation.
This user’s guide is to be used along with the DMC 3000 User’s Guide (n°151153EN).

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2.1 Compatibility
2- General
For the Hp(10) Neutron module to work correctly, it must be paired with a DMC 3000 using rmware V07.1.0 or
greater.
If the dosimeter displays a star at the bottom of its screen, rmware version is earlier than V07.1.0 and is not
suitable. Otherwise, check rmware version by pressing the "+" button to display rmware version.
If rmware version is not visible, use DMCUser.
The DMC 3000 must be equipped with the 26-pin connector (PN: 00153458)
prior to the attachment of the Hp(10) Neutron module.
Please contact Mirion Technologies for compatibility diagnosis and information.
The DMC 3000 must be congured to accept the Hp(10) Neutron Module (congurable in the Parameters tab of
DMCUser, see §2.7).

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General
2.2 Settings
The Hp(10) Neutron Module itself contains all the proper functional settings and calibration parameters.
These parameters are saved in the module on non-volatile memory.
2.3 Hp(10) Neutron Measurement Display
In the standard conguration for the DMC 3000, display of the Hp(10) neutron measurements are automatic after
connection of the module.
Example of available data Display
Hp(10) Gamma Dose
Hp(10) Gamma Dose Rate
Hp(10) Neutron Dose
Hp(10) Neutron Dose Rate
Hp(10) Gamma and Neutron Total Dose
Recognized Module
Identication of
Hp(10) neutron measurement Blue LED for Neutron
dose increments

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2.4 Hp(10) Neutron Chirp Dose Increments
The blue LED ash provides notication of Hp(10) Neutron dose increments.
Dose increments can be selected from the value in the table beside.
The blue LED can be congured to ash for following two (2) options:
For Hp(10) Neutron Dose.
For Hp(10) Total Dose.
An audible beep can be congured to chirp for the following ve (5) options:
For Hp(10) Gamma Dose.
For Hp(10) Neutron Dose.
For Hp(10) Neutron Dose when the Neutron Module is connected and
Hp(10) Gamma Dose when it is not.
For Hp(10) Total Dose.
For Hp(10) Total Dose when the Neutron Module is connected and Hp(10)
Gamma Dose when it is not.
When the audible beep is congured for Hp(10) Gamma, dosimeter use Hp(10)
gamma dose increments dened in the dosimeter.
If the audible beep is congured for Hp(10) Neutron or Hp(10) Total dose,
dosimeter use Hp(10) Neutron Module audible beep dose increments.
This dose increment can be selected from the values in the table beside.
All those congurations are done using DMCUser.
General
One audible beep per...
100 µSv
50 µSv
10 µSv
5 µSv
1 µSv
Without beep
One blue LED flash per...
100 µSv
50 µSv
10 µSv
5 µSv
1 µSv
Without ash

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2.5 Historical Data Function
Measurements and events of the Hp(10) Neutron Module are automatically stored in the DMC 3000 histograms
along with the Gamma Hp(10) measurements and events.
2.6 Handling Recommendations
The belt clip is strongly discouraged when a module is attached on the dosimeter because the opening gap of the
clip is signicantly reduced.
The user must always wear the dosimeter against the body (see the label on the back of the module).
Avoid having any foreign content, such as dust, dirt, or labeling, between the 26-pin connector board and the
module.
Make sure the gasket is clean and safe.
For proper sealing, equal and proper torque should be applied on the four (4) screws.
General

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General
2.7 Module Management
The Module Management Mode is congurable using DMCUser software.
When a dosimeter is congured in "All" mode and has
been equipped with a module, this command resets the
fault message "Mod def" and return to operate without any
module.
Note: This command resets the secondary dose of the dosimeter.
Note: if the dosimeter is congured in "Neutron required" or
"Hp(0,07) required" mode, this command resets the secondary
dose but it does not modify dosimeter operation.
None: any physical connection of module is ignored by the dosimeter.
All: DMC 3000 accepts all type of module. When a module is connected the dosimeter changes automatically
its display conguration and display the Hp(10) neutron or Hp(0,07) shallow dose depending on the type of
module.
Hp(0,07) required / Telemetry required / Neutron required: DMC 3000 needs the required module otherwise
a default message "WRG MOd" is displayed or "Mod def" if no module is connected.

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3.1 Alarm Display and Configuration
The Hp(10) neutron dose and dose rate warnings and alarms are congurable for the entire measurement range
from 1 µSv to 10Sv (0.1 mrem to 1000 rem) and from 100 µSv/h to 10 Sv/h (10 mrem/h to 1000 rem/h).
The Hp(10) neutron multiplier efciency coefcient can alter the precision performance at low dose rates and
modify the neutron dose increments size. The Hp(10) neutron alarm setpoints are saved in the dosimeter.
When an alarm is triggered, its cause is identied by the blinking of the corresponding measures.Visual and
audible alarms signal are shared with gamma and neutron alarms.
3.2 Confidence Test
An optical test is performed regularly every ten (10) minutes in Sleep, Pause mode and Run mode to verify the
module’s neutron detection capabilities. This test performs a complete check of the detection chain.
If the number of detected pulses is fewer than the expected number in one of the channels, the fault message
is displayed. This message lets users know the detection function is not operational.
3- Alarms

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3.3 Fault Diagnosis and Resolution
Major Fault: a major fault prevents the dosimeter from going into Run mode
Display Causes Solutions
The module was disconnected from the DMC 3000 without
rst affecting the disconnection via DMCUser. It is possible
that the dosimeter’s rmware version does not support the
module.
Turn the DMC 3000 in Pause mode. Verify the connec-
tion of the module and the integrity of the connector.
Verify that the rmware version of the dosimeter is
V0.7.1.0 or newer. Reconnect the module while the
DMC 3000 is in Pause mode. If problem persists,
contact your Mirion representative.
The dosimeter does not recognize the module. Change the DMC 3000 conguration to accept the
Neutron Module using DMCUser. See §2.1 and §2.7.
Physical problem related to the module’s detection circuit (not
communicating with the microprocessor).
Turn in Pause mode the dosimeter. Disconnect the
module.
Check the cleanliness of the module contact surface.
Verify the integrity of the 26 pin connector (all the
contacts at the same level).
Reconnect the module while Dosimeter in Pause.
If problem persists, contact your Mirion representative.
Physical problem related to the module’s detection circuit and
its detectors (optical verication).
Contact your Mirion representative.
Physical problem related to the module’s detection circuit (no
measurement time).
Contact your Mirion representative.
Limits to the pulse count due to too many mechanical shocks
or electromagnetic disturbances to the module’s detection
circuit.
Conrm the default occured during "normal" use (wit-
hout any mechanical stresses or elevated electroma-
gnetic activity). Contact your Mirion representative.
Minor Fault
Display Causes Solutions
The module’s calibration date has passed. Have the module calibrated.
Alarms

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4.1 Removing the battery cover
Make sure the dosimeter is in PAUSE mode.
Unscrew the two screws (2) with the screwdriver provided with your DMC 3000 (1).
Rotate the battery cover (3).
Remove the battery cover (4).
4- Module Attachment
Note :
Due to the presence of voltage on the pins of the 26-pin connector, remove or add new modules when the dosimeter
is in Pause mode. Avoid shorting the pins.
(1)
-
+
(3)
(4)
(2)

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4.2 Attaching the Hp(10) Neutron Module
Carefully insert 26-pin connector, ensuring side labeled “BATTERY
SIDE” is inserted closest to the battery (5).
Check the cleanliness of the module gasket.
Completely loosen the 2 screws on the ange of the neutron Module.
Make sure the ange is lowered.
Place the module at a 45° angle to the base of the dosimeter and rotate
it into position (6).
Apply pressure to the ange on both sides (7).
Hand tighten the four module screws with the screwdriver provided (1)
at 0.25 to 0.35 Nm (8).
Ensure the dosimeter display’s transmitter icon activates . If it does
not, verify the dosimeter is congured to accept the module (see §2.1
and §2.7).
Module Attachment
Note:
Due to the presence of voltage on the pins of the 26-pin connector,
remove or add new modules when the dosimeter is in Pause mode.
Avoid shorting the pins.
(6)
(7)
(8)
(5)

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Module Attachment
Note:
Due to the presence of voltage on the pins of the 26-pin connector, remove or add new modules when the dosimeter
is in Pause mode.
Avoid shorting the pins.
4.3 Detaching the Hp(10) Neutron Module
Make sure the DMC 3000 is in Pause mode.
Unscrew the four screws (9) with the screwdriver provided with your DMC 3000 (1).
Pivot the module and detach it from the dosimeter (10).
Conduct a software disconnect using the "Detach Module" command of DMCUser software (11), or temporarily
remove the dosimeter’s battery (12).
Replace the battery if necessary.
(9)
(10)
(11)
(12)

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5- Manual Calibration & Maintenance
5.1 Principles
The neutron dose is linked to the number of counts by the following formula:
N dose = f (counts)
Kn x KnMul x KnTask
Kn is the factory efciency coefcient and can not be changed by the user.
KnMul is the Neutron efciency coefcient multiplier and is set to 1.
KnTask is another neutron efciency coefcient multiplier. This multiplier is managed by the dosimetry system or
end user and may be used to adjust the neutron response of the dosimeter as a function of the energy spec-
trum.
Note:
Kn and KnMul, Neutron calibration parameters, are saved inside the module. Thus Neutron calibration can be perfor-
med with any DMC 3000 dosimeter.

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Manual Calibration & Maintenance
5.2 Manual Hp(10) Neutron Calibration
Expose the dosimeter to a neutron source and obtain a minimum "expected dose" of 2 mSv (200 mrem), read
the neutron dose displayed on the dosimeter as the "read dose".
Note the Hp(10) neutron efciency coefcient multiplier using DMCUser. This multiplier is called "KnMul Old".
Determine the new multiplier "KnMul New" using the following formula:
KnMul New = KnMul Old x Read Dose / Expected Dose
Turn the dosimeter in Pause mode and, using DMCUser, modify the Hp(10) neutron efciency coefcient multi-
plier “KnMul” using the value for “KnMul New”.
Turn the dosimeter in Run mode, expose the dosimeter to the same source and verify that the dosimeter’s res-
ponse is within the set limits.
Note:
The Neutron Module is calibrated at the factory using established procedures and international standards (ISO/CEI
17025). Mirion Technologies recommends an annual verication of the dosimeter’s calibration.
However, the frequency of this verication may be dened by the client according to the conditions and frequency in
which the dosimeter is used, and according to local regulation.
Reducing efciency multipliers (KnMul or KnTask) increases the dosimeter's neutron response.

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Manual Calibration & Maintenance
5.3 Maintenance
Mirion Technologies recommends full inspections of dosimeters at a minimum of once a year.
Calibrations (Gamma and Neutron): see §5.2
Functions: check that the DMC 3000 displays and Neutron dose by pressing the "-" key.
Check the auto-test when the DMC 3000 exits standby mode:
the speaker will chirp once,
the front ash LED and top LEDs (Red, Green, Blue) will briey illuminate,
all display segments will light
the backlight will turn on.
Check the speaker by activating the dosimeter using a rate pre-alarm set point of 0 mSv/h (0.0 mrem/h).
The KnMul and KnTask efciency multipliers directly affect the dosimeter response, and must be changed by
qualied technician. It is advisable to check periodically that these efciency multipliers (KnMul and KnTask) are
adapted.

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6- Technical Characteristics
6.1 Physical Characteristics
Tested according to IEC 61526 Ed. 3
Measurement and display:
Quantity Hp(10)
Neutron energy range: 0.025eV to 15MeV
Neutron measurement range: 1 µSv/h to 10 Sv/h (0.1 mrem/h to 1000 rem/h)
Neutron display dose range: 1 µSv to 10 Sv (0.1 mrem to 1000 rem)
Neutron display rate range: 100 µSv/h to 10 Sv/h (10 mrem/h to 1000 rem/h)
Resolution of recorded dose: 0.01 µSv
Contribution of high energy gamma in the neutron dose: less than 5% of the Gamma rate, at 2 Sv/h of
Co60
Accuracy Hp(10) Neutron
≤ ± 10% (AmBe, 0.75 mSv/h, target 1.3)
Dose Rate Linearity Hp(10) Neutron
≤ 20% up to 10 Sv/h

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6.2 Electrical Characteristics
The Hp(10) neutron module is powered by the DMC 3000 dosimeter
Battery life (with the neutron module) is eight (8) calendar months (typical use of eight (8) hours a day, ve (5)
days per week in Run mode, without excessive alarms (*)
Battery life (with the neutron module) of 2000 hours in continuous operation without excessive alarms (*)
(*) 0,2% of functional time in alarm
6.3 Mechanical Characteristics
Rugged, high impact polycarbonate-ABS case.
Dimensions (DMC 3000 + Hp(10) neutron module):
131 x 60 x 28 mm (5.2 x 2.4 x 1.1 in) with standard clip
131 x 60 x 21 mm (5.2 x 2.4 x 0.8 in) without clip.
Weight (Hp(10) neutron module + DMC 3000 with an alkaline battery and a standard clip): 138 g (4.9 oz).
Weight (Hp(10) neutron module only): 30 g (1 oz)
6.4 Environmental Characteristics
The following characteristics are applicable to DMC3000 equipped with a Neutron module.
Temperature Range: -10°C to 50°C (14°F to 122°F)
Relative humidity: <90% at 42°C (108°F)
Storage : -20°C to 71°C (-4°F to 160°F) without battery
Shock, vibration and drop resistant (1.5 meter on concrete)
Waterproof IP67 1m (39 in) during 1 hour
EMC: complies and exceeds standards by a large margin (CE compliant, certicate number DOC003215)
MIL STD 461 RS103 (pulsed electric eld): exceeds 200 V/m from 10 kHz to 5 GHz
MIL STD 461 RS101 (magnetic eld 30 Hz to 100 kHz)
Technical Characteristics

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6.5 Factory Calibration and Verification
Calibrated according to ISO/IEC 17025 with an AmBe source.
Calibration beam precision < ± 16% (expanded uncertainty k=2)
Calibration dose rate : around 0.75 mSv/h
6.6 Functional Characteristics
Condence test:
Self-test of the neutron module detector every ten (10) minutes.
Test of module/dosimeter link every second.
Neutron data integrity test by CRC 16 check.
6.7 Environmental regulations
In accordance with European regulation (Directive DEEE 2002-96-CE), Hp(10) neutron modules should not be
thrown out with non-sorted waste, but must be selectively collected.
Follow local regulations.
Technical Characteristics

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Technical Characteristics
6.8 Calibration Reference Point
Note : Dimensions in millimeters
Gamma
Neutron
0,95