ITO LTD, in cooperation with the Marine Environmental Radioactivity Laboratory of the Hellenic Centre for Marine Research (MERL-HCMR) and the Laboratory of Nuclear Physics of the National Technical University of Athens (LNP-NTUA), has successfully completed the project “Research and development of an in-situ underwater gamma-ray spectrometer for low-level radioactivity measurements” (Code: 12CHN212), in the frame of a bilateral Greece-China cooperation. The project was co-funded by the General Secretariat for Research and Technology (GSRT), Greece, under NSRF 2007-2013.
The final product of the project is the GeoMAREA system (Gamma-ray spectrometer for in-situ MARine Environmental Applications).
The GeoMAREA system
The sensor was developed for measuring in- situ the activity concentration of gamma-ray emitters in the marine environment. It is characterized by: capability to offer free-of-error continuous functionality down to 600 meter water depth; pluggable watertight cabling system for real time data transmission in case of operation at a buoy; high efficiency due to the minimum gamma-ray absorption in the enclosure material. Along with the sensor, a methodology has been developed (by using simulation codes and laboratory experiments) to convert the acquired gamma-ray data to quantitative activity concentrations (in absolute units Bq/L or Bq/m3), even for low level radioisotope concentrations. The combination of the state-of-the-art in-situ gamma-ray underwater sensor with the reliable quantification methodology renders GeoMAREA a gamma-ray spectrometer which is capable of performing measurements for different applications in the marine environment. The system has already been presented in international conferences.
- Low power consumption
- Small dimensions
- Long-term operation
- Autonomy (computer independent)
- Improved energy resolution and sensitivity
- Different operation modes (stand-alone, cabled, at a buoy, on mobile platforms)
- Capability for automated estimation of low radioactivity levels
- Policy and decision-making
Radioprotection, especially in coastal zone where nuclear power and waste processing plants operate (continuous monitoring and early warning)
- Pollution assessment and monitoring
Radioecology studies – including monitoring radioactivity levels at the sea bottom – in coastal areas with industrial activity (cement, fertilizer, oil, mineral/mining, desalination plants)
- Energy resources
Monitoring of natural radioactivity for hydrocarbons exploration activities (gas hydrates included) in the marine environment
Rainwater quantification and estimation of cloud type
- Geophysical research
Gas emanation/activity of submarine faults, volcanoes and cold seeps
Quality and quantity assessment of submarine groundwater discharges
For more information please visit the following link: http://radioscopio.hcmr.gr