Treatment of organic material α contaminated
- The CarbolyseTM process is applied to organic matter having a radioactive contamination α.
- α radioactive contamination is characterized by an emission of helium nuclei. This emission of α particles is specific to chemical elements having an atomic weight higher than that of lead
- Contaminated organic materials are usually contaminated with radioactive material from operating activities of nuclear facilities (nuclear power plants, reprocessing plants, etc.), irradiation devices, research laboratories, etc.
- Most of these contaminated organic materials are tissues, work clothes, cleaning rags, rubber gloves when handling, etc. and having dust radioactive particles.
- These contaminated organic materials account for, in the context of uninterrupted operation, a very high volume.
- This volume presents a significant problem of storage or disposal. The solutions applied in most countries are based on the setting sealed containers stacked on each other for disposal in landfills.
- The implementation of these centers usually causes negative reactions from local residents and environmental organizations. It is therefore important for operators to better manage these social movements and minimize then as far as possible.
- In addition, the management of these storage facilities requires constant monitoring of their environment: gaseous samples, liquid discharges checking, and this for many years to come with a significant cost!.
- The fundamental question posed by packaging waste is related to the reduction in volume. This process would reduce the number of landfills while enabling the increase in the volume of waste to be disposed.
- The CarbolyseTM process reduces, more significantly, the volume of contaminated material to be stored permanently, but does not eliminate it completely.
2 Value of combustible from process
- Combustible product obtained cannot be used in thermoelectric plant, like those resulting from the treatment of industrial waste.It is necessary to ensure the protection of operators and containment of dust.
- These combustible products will be burned directly in the CarbolyseTM process reactor; resulting treatment products are smoke and combustion ash.
- It must be noted that the burning will be done in superoxygenated atmosphere, and will be controlled stoichiometry. The emission of smoke will be reduced to its minimum value.
3 Specific changes
- Specific changes will be made to operator protection, dusting smoke and containment of dust.
- – Radiation protection of operators falls within the scope of the regulation of such facilities. Changes must meet local standards.
- - Contaminated wastes are delivered in containers that are suitable for the process (preferably "plastic"). These containers and their contents are may be temporarily stored in a ventilated and enclosed room whose floor is completely washable.
- The containers and their contents are introduced into the treatment plant, without opening to the outside. From this stage onwards the processing operations are performed mechanically and by automation, in sealed enclosures without ingress of air.
- After treatment supplemented by in-situ combustion of the decomposition products, the only outward discharges are smoke and ashes.
- 1 - The fumes are discharged to the atmosphere after passing through absolute filters that retain any entrained dust. These HEPA filters will be at end of life, treated by the CarbolyseTM process in the same installation.
- 2 – The ashes represents only a very small volume- on average less than 1%. They are collected and mixed in oils from CarbolyseTM process, at the end of the treatment cycle, and without ingress of air.
- The ash-oil mixture is cast in waterproof containers whose design will meet the requirements of standards and regulations. These containers are then stored in landfills without other constraints.
- Building services equipment includes, as in all facilities receiving radioactive materials, and in compliance with regulatory obligations:
- - Appropriate monitoring systems.
- - Detection equipment, control and measurement.
- The volume in final storage is the volume of ash-oil blend. It represents less than 20% of initial weight and low volume compared with the original volume.