In 2022–2023, the Sosny R&D Company developed and manufactured equipment for testing technologies of concentration, sorption and extraction purification of high-level waste (HLW) of complex chemical composition using simulation solutions. The work was done under the contract with FSUE Mayak PA.
The equipment includes:
- a filtering container for sorption purification of the HLW solution;
- a two-stage centrifugal extractor for extraction purification of the HLW solution;
- a direct-flow evaporator for concentrating the HLW solution;
- four containers for transferring samples;
- a bogie for transferring the container on a forklift.
The filtering container is a metal insert compatible with Type NZK-150-1.5P container. The basket of the filtering container is made of 19 tubes filled up with a sorbent and joined with flanges. The tubes are interconnected through collectors. There are filtering distributors in the top and bottom parts of the tubes to uniformly distribute the solution throughout the cross section of the sorbent column. Inlet fittings are equipped with manual shut-off valves.
The filtering container is designed so that it allows regular upwash cleaning of the sorbent. Used filtering container can be placed into Type NZK-150-1.5P container for long-term storage or disposal.
Specifications
| Safety Class as per NP-016-05 | 4 |
| Total sorbent volume | 0.075 − 0.090 m3 |
| Operating pressure | 0.5 MPa |
| Feed flow rate | 150–250 L/h |
| Sorbent height to internal diameter ratio | 6 |
| Overall dimensions (Length x Width x Height) | 860x956x905 mm |
| Base materials | 12Х18Н10Т |
The centrifugal extractor for extraction purification of HLW solutions comprises two extraction stages mounted on a welded frame.
Each stage consists of a fixed housing and a removable rotor. The housing contains a mixing chamber with two feed inlets and two ring-shaped collectors for separated phases (light phase and heavy phase) with outlets for separated solutions. An overflow branch pipe connected to an overflow collector prevents overfilling. The extractors are emptied by vacuuming via phase outlets. A vibration sensor and a rotor rotation indicator are mounted on the housing.
The equipment is controlled from the local control panel. Besides, the local control panel controls the following process variables:
- revolution frequency of each extractor stage shaft;
- vibration velocity of each extractor stage;
- temperature of the electric motor stator winding for each extractor stage.
Specifications
| Safety Class according to NP-016−05 | 4 |
| Operating pressure | hydrostatic |
| Leakage class to GOST R 50.05.01−2018 | V |
| Operating medium | organic nitrate solutions |
|
Total capacity (all phases) (for 30% TBP in synthin + 2М HNO, with phase capacity ratio 0/В=1) |
0.6 m3/h max. |
| Working volume of mixing chamber | 0.0012 m3 |
| Rotor working volume | 0.0012 m3 |
| Rotor diameter | 140 mm |
| Interface radius | 34 mm |
| Minimum relative centrifugal force | 85 |
| Motor power | 1.1 kW |
| Overall dimensions (without control panel) | 850×700×1400 mm |
| Weight | 460 kg |
| Service life | 10 years |
| Base materials | 12Х18Н10Т, Ст3сп5 |
The direct-flow evaporator is an assembly of three units: an evaporator, a heater and a separating condenser interconnected with flanges. The equipment components and piping with the temperature above 40 °C are heat-insulated. The design allows flushing the components, if required.
The evaporator reduces the volume of the feed down to a required concentration. It consists of tubes connected to the jacket with air-tight welds. The steam flows in and spent steam flows out through the branch pipes.
The heater pre-heats the feed by spent steam coming from the evaporator. It is a tube-in-tube weldment.
The separating condenser splits the boiling simulation solution into salt melt and secondary steam to be condensed.
Specifications
| Safety Class according to NP-016−05 | 4 |
| Feed | aqueous NaNO3 solution |
| concentration | 350 g/L |
| density | 1.21 g/cm3 |
| boiling temperature | 104 °С |
| Capacity | 250 L/h |
| Degree of concentration | at least 2 |
| Heat source | saturated steam |
| temperature | 140 °С |
| pressure | 0.4 MPa |
| flow rate | 180 kg/h |
| Secondary steam cooling source | water |
| temperature | from 5°С to 15°С |
| pressure | 0.3 MPa |
| flow rate | 1.8 m3/h |
| Weight | 1150 kg |
| Overall dimensions (Length x Width x Height) | 6536x1320x2359 mm |
| Base materials | 12Х18Н10Т, Ст3сп5 |
The container is designed for transporting ILW and HLW solutions (samples) in flasks Кн-2-100-34 ТС GOST 25336-82.
The container has a demountable design. The base, shell and lid serve as biological shielding. The rotary slide gate is opened and closed manually with a handle. A flask carrier for three flasks with product is secured on the slide gate. The container lid has threaded spring retainers to immobilize the flasks during transportation. Three positioners provide alignment of the container on the bogie during transportation. A drain system for spillage is designed in case of a flask failure.
Specifications
| Safety Class according to NP-016−05 | 3 |
| Dimensions | 545×730×656 mm |
| Minimum thickness of biological shielding | 130 mm |
| Capacity | 3 flasks |
| Product volume per one flask | 50 mL |
| Weight | 911 kg |
| Base material | 12Х18Н10Т |
The bogie with swivel casters and movable platform is designed to transport the containers.
Specifications
| Overall dimensions | 1340x830x1080 mm |
| Weight | 366 kg |
| Base material | 12Х18Н10Т |
The ready-made equipment for HLW conditioning was delivered to the customer (FSUE Mayak PA) in 2023.
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