Gamma
Radiation Monitoring Systems
Bertin Nuclear develops RMS chains, complete radioactivity monitoring solutions for nuclear power plants and facilities.
The Grand Carénage, a major industrial program, aims to extend the operating life of French nuclear power plants up to 60 years. Since 2016, Bertin Technologies has taken part in this project by successfully developing, industrializing and installing RMS measurement chains on behalf of EDF (French electricity generation and supply company).
Our RMS solutions integrate a range of instruments for ionizing radiation measurement, such as gamma radiation detectors specially designed for nuclear power plants and other nuclear facilities.
Our cutting-edge technology enables us to manage complex systems while meeting the highest safety and performance standards. RMS chains incorporate a range of ionizing radiation measuring instruments, such as gamma detectors. They also include remote monitoring systems and data management software that facilitate collecting, transmitting and analyzing the information gathered.
Our RMS monitors are equipped with the following components:
- The GM 700, the IC 400 and the MX 33: a carefully selected detection sub-assembly, chosen based on the specific activity to be measured, ensuring accurate and reliable measurements regardless of the type of radiation.
- The MDU: a local processing unit that processes measurement data in real-time. This unit is able to provide detailed information on radiation levels and generate alarms when thresholds are exceeded.
- A junction box that ensures connection and electrical safety between the various components of the monitoring system and facilitates integration into the existing infrastructure.
- The IDU-PB6 and the ADU-A: an alarm reporting unit for the transmission of alarms to central control stations or external alarm devices. This enables rapid reaction in the event of an abnormal situation or if safety thresholds are exceeded.
- Sysview: a local maintenance tool. Allows you to set parameters, place orders or access data on equipment connected to the maintenance software. It can also be used for remote expertise from “clone” files.
Radiation type
Measuring range
104 to 109 Bq/m3
Energy range
50 keV to 2.5 MeV
Detector type
3’’ x 3’’ NaI scintillator with photomultiplier
TID
100 Gy
Environmental characteristics: Storage
| Temperature range | +5° to +45°C |
|---|---|
| Relative humidity | 70% non-condensing Operation (according to IEC 60068-2) |
| Long-term temperature range | +5 to +45°C |
| Occasional maximum | +5 to +55°C |
| Relative humidity | 70% non-condensing |
Radiation type
Gamma
Measurement range
10-6 to 1 Sv/h
Energy range
60 keV to 7 MeV
Detector type
Ionization chamber
Measurement Volume
4 liters
Filling gas
Air at atmospheric pressure
High voltage used
+590 V
TID of connection box with inhibition
140 GGy
Monitor TID
100 Gy
Environmental characteristics: Storage
| Temperature range | +5° to +45°C |
|---|---|
| Occasional maximum | +5 to +55°C |
| Relative humidity | 70% non-condensing Atmospheric pressure |
Radiation type
Gamma
Measurement range
10-5 to 10 Gy/h
Energy range
60 KeV to 3 MeV
Detector type
Ionization chamber
TID
100 Gy
Filling gas
Air at atmospheric pressure
High voltage used
+590 V
Environmental characteristics
| Environmental operating data (to IEC 60068-2) | |
|---|---|
| Long-term temperature | +5 to +40°C |
| Occasional maximum | +5 to +55°C |
| Relative humidity | 90% non-condensing Atmospheric pressure |
| Storage environmental characteristics (as per IEC 60068-2) |
-25°C to +70°C |
|---|
| MTBF > 25.000h (with preventive maintenance) | calculated according to FIDES guide |
|---|
CPU card
Color graphic display
6-key keypad
Keyless rotating button to acknowledge any alarms
Front panel buzzer (alarm indication)
4 indicator lights
• 3 glass bulbs (lights) located above the box:
– Red: “Alarm Threshold 2” (AL2)
– Orange: “Alarm Threshold 1” (AL1)
– Green: Good Operation (GO)
• 1 “TEST LAMP” indicator on front panel
6 LED indicators
– AL2: red to indicate a ‘‘Threshold 2 Alarm’’ alarm
– 1 front panel ‘‘TEST lamp’’ indicator
– AL1 : yellow to indicate a ‘‘Threshold 1 Alarm’’alarm
– SE: Operating Threshold
– BF: green to indicate Good Operation
– Test : white to indicate TEST mode
– Status: Blue. Steady light when initialization is complete and the monitor is operating.
Front panel USB socket (for maintenance)
On the bottom: 4 connectors and a ground stud
– 1 “DATA” connector: logic and analog I/O
– 1 “COM” connector: alarm and test relay outputs
– 1 “ALIM” connector: 24V or 230V power supply
– 1 grounding stud
1 measurement drawer (with daughter board depending on the detector)
1 ON/OFF switch for 220V AC power supply
1 white LED indicator (on the left) to signal the presence of mains power upstream of the box (on the left)
1 white LED indicator (on the right) to signal the main presence downstream of the box
1 CAMAC drawer
1 front panel HMI
1 microprocessor board
1 display board
1 IDU PB6 interface card (EDF rack interface type PB6 34 pts)
Signals
• JBUS serial link with MDU
• Management of 3 relays 2 RCT outputs
• Analog output: activity measurement
• Power supply for IDU and remote MDU
100% analog solution
Safety level : 1E
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