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MARC-7000
Tritium sampler
Description
MARC-7000 is a device (bubbler) designed for capturing tritium in order to subsequently measure its concentration (in both vapor and gaseous forms) in the atmosphere. It is an automated air sampling system equipped with a pump, filtration unit, oxidation furnace, as well as cooling and display modules. Its operation is based on creating a stable vacuum that enables air samples to be drawn through water-filled containers at a specified volumetric flow rate.

The aspirator is equipped with a precise flow sensor, timer, dust-trapping paper filter, and an LCD screen that displays key operational parameters: furnace temperature, cooling system temperature, instantaneous and accumulated air volume, and warning signals. The built-in memory stores data on the accumulated air volume up to 25,000 m³.
The oxidation furnace is a tubular unit made of stainless steel, featuring a palladium-on-alumina catalyst, and operates at temperatures ranging from +200 °C to +450 °C, ensuring effective oxidation of hydrogen and organic compounds. The bubbler cooling system maintains container temperatures between +5 °C and +15 °C using a refrigeration unit with copper fittings and a circulation pump.
The diagnostic system monitors and signals faults related to coolant circulation, fluid levels, cooling temperature, container integrity, flow capacity, and furnace temperature.
Tritium samples obtained using the MARC-7000 are then measured using the Liquid Scintillation Spectrometer TRIEL.


Application
The MARC-7000 is a modern, automated sampling system specifically designed for use in environments requiring reliable control of tritium-containing emissions. It is widely employed at nuclear power plants, in industries dealing with tritium, in nuclear medicine, and in scientific research aimed at studying the impact of radioactive contamination on the environment.
MARC-7000 is particularly effective for monitoring emissions from ventilation and process systems (e.g., stacks) and for the degassing of liquid and solid waste containing tritium. Its high trapping efficiency (over 95%) is achieved through an integrated oxidation furnace with a catalyst, which converts organically bound tritium into a form suitable for capture, and a bubbler system with water cooling that prevents fluid evaporation and allows for extended sampling intervals—up to one month instead of the standard weekly schedule.
The device features a dynamic sealing system that ensures fast and reliable operation without the risk of solution leakage. A built-in microprocessor controls all operational parameters, including airflow, temperature settings, and alarm signals, making the MARC-7000 safe for long-term use. The simple replacement of contaminated containers eliminates the need for costly decontamination procedures, significantly reducing operational expenses.
Technical data
Number of pots
4
Air flow regulation range
10 - 50 L/h
Efficiency of trapping gaseous tritium
> 95%
Efficiency of tritium water capture
> 95%
Furnace temperature
+200°C .. +500°C
Weight
30 kg
Dimensions
700 x 356 x 270 mm
Operating temperature
+2°C .. +45°C
Power consumption
300W (700W with cooler)
Continuous operation time
48h
Power supply
230 V / 50 Hz or 120 V / 60 Hz
Total average service life
> 6 years