JP5828161B2 - Harmful substance collection treatment equipment at nuclear power generation facilities - Google Patents

Description

  The present invention relates to an apparatus for collecting and processing leaked harmful substances in a nuclear power generation facility.

  In a nuclear power generation facility, it is sufficiently assumed that radioactive materials may leak to the outside due to the nuclear reactor accident or may be leaked in the future.

  The emergency measures are not fully considered, and it is important to provide effective measures here.

  The present invention is intended to solve such problems of conventional devices, and leaks harmful substances in nuclear power generation facilities that can effectively collect harmful substances such as leaked radioactive substances and ensure safety. An object of the present invention is to provide a collection processing apparatus.

In order to achieve the above object, the present invention is an apparatus for collecting harmful substances such as radioactive substances leaking inside or outside a nuclear power generation facility and safely processing the collected substances. there are a suction means for guiding to the outside aspirated harmful substances leaked, has a capturing current adverse substances and treatment tank adapted to be introduced through the vessel at one end by the suction means, the processing tank A flow control wall arranged to form a serpentine flow path for a long flow of water, and actively adsorbing harmful substances in the meandering and final stages of the serpentine flow path Nuclear power having an adsorbing means arranged, a watering device for distributing water from above into the meandering flow path, and a gas diffusion device for adding fine gas as air from below into the meandering flow path Capture of toxic substances leaked at power generation facilities A treatment apparatus, wherein the treatment tank is arranged in a plurality of parallel types with a suction unit disposed in the middle of meandering and the last stage of meandering as a unit, and those arranged in a plurality of parallel types are arranged in series. It is characterized by being arranged .

As described above, the apparatus for collecting harmful substances leaked at a nuclear power generation facility according to the present invention collects harmful substances such as radioactive substances leaking inside or outside the nuclear power generation facility and safely treats the collected substances. A suction means for sucking and introducing leaked harmful substances to the outside, and a treatment tank in which the harmful substances collected by the suction means are introduced through one end of the tank. The treatment tank actively adsorbs harmful substances in the meandering and final stages of the meandering flow control wall, which is arranged to form a meandering flow path for a long water flow. An adsorbing means arranged as a device, a watering device for distributing water from above into the serpentine channel, and an air diffuser for adding fine gas as air from below into the serpentine channel. Leakage at a nuclear power plant with A toxic substance collection treatment apparatus, wherein the treatment tank is arranged in a plurality of parallel types as a single unit in which the adsorption means is arranged in the middle of the meandering and the final stage of the meandering, and arranged in the plurality of parallel types Since it is characterized in that things are arranged in series, it is possible to provide a device for collecting and processing leaked harmful substances in nuclear power generation facilities that can effectively collect and maintain leaked radioactive materials. I can .

  The longitudinal cross-sectional view which shows one Embodiment of this invention.   The principal part cross-sectional view of FIG.   The principal part enlarged view which shows other embodiment.   The apparatus longitudinal cross-sectional view which shows other embodiment.   The longitudinal cross-sectional view which shows other embodiment.   The longitudinal cross-sectional view which shows other embodiment.   The longitudinal cross-sectional view which shows other embodiment.   The front view which shows other embodiment.   The longitudinal cross-sectional view which shows other embodiment.   The longitudinal cross-sectional view which shows other embodiment.   The longitudinal cross-sectional view which shows other embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. The plan example described in each embodiment can be applied to other embodiments.
In these drawings, 1 is the ground, 2 is the reactor building, and the turbine building is connected to the building 2, but is not shown here.

  The reactor building 2 includes a reactor containment vessel 3 and a pressure suppression chamber 4 provided at the bottom thereof. The reactor containment vessel 3 contains a pressure vessel 5, and a fuel rod 6 is provided in the reactor vessel 3 and can be controlled by the control rod 7. A in FIG. 1 is a cooling water introduction path, and B to D are water vapor return paths. Of these, the path B is a drive source for operating a turbine generator (not shown). 8 is a spent fuel rod, 9 is its pool, and 10 is a condenser. The details of these operations are well known, and their description is omitted here.

In FIG. 1 and FIG. 2, 15 is a suction means for sucking hydrogen gas generated by an accident in the building together with the radioactive substance, and the means 15 includes a first suction pipe 16 penetrating the upper wall of the building 2, The first suction pipe 16 is provided with an appropriate number of valves 18 that can be opened and closed by remote operation. 19 is a joint, and 20 is a second suction pipe.
The suction pipes 16 and 20 are erected on the emergency countermeasure trolley side which can be independently driven by remote operation together with the suction port portion 17 so as to be able to move up and down and change the angle so that the building 2 and the surrounding area can freely circulate. The leaked radioactive material can be forcibly sucked.

A suction communication pipe (or tube) 22 is connected to the second suction pipe 20 and communicates with the treatment tank 25 via the suction machine 23. The route may be equipped with a remotely operable valve. An arrow E is a path for guiding the sucked hydrogen gas mixed with the radioactive substance into the treatment tank 25.
The sealed processing tank 25 is supplied with a flow control wall 27 arranged so as to form a long flow path 26 by forming a meandering flow in the vertical direction and a liquid as water as indicated by an arrow F. Sprinkling device 28 that distributes liquid from above into channel 26, diffuser device 29 that adds fine gas from below into channel 26 along the path indicated by arrow G, and harmful in the middle or at the final stage of channel 26 An adsorbing means (such as a nanofilter) 30 that actively adsorbs a substance.
The adsorbing means 30 is composed of a sand particle layer or an activated carbon layer. The watering can be fine cluster water (can also contain bio).
In addition, although the process tank 25 is made into multiple parallel types, such as 2 parallel, as shown in FIG. 2, you may make it a multiple series type as shown in FIG. 1, and may connect a parallel type in series. .
Moreover, although the said flow path 26 is made into the up-and-down meander type, it can be made into the system meandering in a plane, or can be made into a spiral flow path.

  Further, as shown in FIG. 3, the building 2 is a hydrogen explosion if the steel frame 31 is made of a reinforced concrete frame and the steel frame 31 is made of a pipe resistant to explosion and equipped with the first suction pipe 16 and the suction port 17. Even if there is, it is possible to vent the gas without impairing the function. The suction pipe 16 may be provided in the lower stage like a virtual line.

FIG. 4 shows another embodiment. In the embodiment, the treatment tank 35 is formed in a tower shape, and hydrogen gas mixed with a radioactive substance from the suction machine 36 is guided to the inner bottom portion of the treatment tank 35, and a multistage adsorption filter ( The upper stage may be a nanofilter) 37... And a watering device (such as bio-clustered water) 38... May be provided to adsorb and remove radioactive substances.
The adsorbed clean gas is guided from the exhaust port 39 to the storage container 40 for treatment. If a liquid reservoir 41 such as water is placed in the inner bottom of the processing tank 35, the removal efficiency is increased, and the removed liquid is stored in the storage container 40 in the same manner. In addition, the said watering can be made into the specific liquid which has the property which adsorb | sucks a radioactive substance better.
Note that a plurality of the tower-type treatment tanks 35 can be arranged in parallel so that radioactive substances can be reliably adsorbed and removed at a slow speed. On the other hand, a plurality of these can be communicated in series.

  FIG. 5 shows another embodiment. In this embodiment, the reactor building 45 equipped with the required reactor facilities is fixed and installed in the water bottom 46 of a water storage location 46 such as a dam or a basin, not on the ground, even if radioactive materials leak in an accident. It is designed not to be immediately released to the ground. The water reservoir 46 may be either natural or artificial. 47 is a reactor water pressurizer, 48 is a turbine building, and 49 is a remover for sucking and storing hydrogen gas containing radioactive material leaked inside and removing it later, and is mounted on the float 50. 51 is a valve which can be operated remotely.

  FIG. 6 shows another embodiment. In the embodiment, hydrogen gas mixed with radioactive material collected from the reactor 54 is introduced into the wastewater treatment plant 55 to remove only the radioactive material, and then the exhaust gas is pumped to the molding treatment plant 56 and the treatment plant 56 shows a safety measure that is confined in a safety sealing block (made of concrete) 57 in 56 and is transferred to a safe sea area as far as possible by a processing ship 58 and discharged to the sea floor. Such a method of blocking and dropping to the seabed is also applicable to other embodiments.

  FIG. 7 shows another embodiment. In the embodiment, the gas component mixed with the radioactive material leaking from the nuclear reactor 60 can be sucked from the suction port portion 62 of the special vehicle 61 equipped with a boom that can be expanded and contracted so that the suction can be adapted to the leak location. In addition, the suction part is guided into the treatment tank 25 shown in FIG. 1 and FIG. 2 as indicated by an arrow J so that water can be exhausted as a clean gas from which radioactive substances have been removed by adding water, aeration and filtering. It is a thing.

The sucked gas component is not led to the treatment tank 25, but is introduced into the cyclone type adsorption treatment tank 64 as shown in the lower column of FIG. Such powdery adsorbents (catalyst and other fine particles) 65 are distributed from the rotary disperser 66 and the radioactive substances are adsorbed by these adsorbents 65, thereby introducing them into the water-containing recovery tank 67 and discarding them. You may make it process.
Reference numeral 68 denotes a drive gear for horizontally rotating the rotary charging machine 66, and an arrow M indicates an adsorbent charging path. Reference numeral 69 denotes an exhaust section with a filter, and 70 denotes a hermetic transfer container.
The adsorbent 65 may be introduced from the middle barrel portion of the tank 64 as indicated by an arrow N.
Further, the gas component from the arrow L may be guided from the tank 64 to the processing tank 25 through the communication port 71, or the gas processed in the processing tank 25 may be guided to the tank 64 for reprocessing.

FIG. 8 shows another embodiment. The embodiment shows an example of a countermeasure when the building of the reactor 74 has exploded and cooling water needs to be introduced into the reactor 74, and is installed at a position apart from several reactors 74. A fixed wire 76 is stretched between the upper ends of the columns 75, 75, and a water supply tube 78 having a sprinkling port 77 is provided on the wire 76 so that it can reciprocate on the reactor 74, and its movement can be remotely controlled. This is performed by the driving cable device 79. 80 is a water tank with a pump.
By operating the driving rope device 79, the sprinkling port 77 can be moved back and forth, so that the cooling water can be poured into the nuclear reactor 74 by discharging water from the port 77.
In addition, this water distribution apparatus can be arranged in several rows in the direction of the front and back of the figure.

FIG. 9 shows another embodiment. In this embodiment, a reactor 83 with a turbine generator is mounted on a large vessel 82 such as a large tanker, an aircraft carrier, or a large catamaran, and is fixed by a mounting bracket 84. While it is possible to distribute power generation through the detachable energizing cable 85, in the event of an emergency in the reactor 83, the cable 85 is removed and exits to the ocean as shown in FIG. 10 and the reactor 83 is lifted by the crane 86 as much as possible. The safety is ensured by leaving the seabed 87 deep.
In FIG. 9, 88 is a fresh water generator for cooling water of the nuclear reactor 83.
If the reactor 83 is sealed with a safety protection sheet before being left on the seabed, the safety is improved.

  Further, as shown in the upper right column of FIG. 10, when the ship 82 is preliminarily equipped with the concrete formwork 90 and the nuclear reactor 83 has an accident on land, the nuclear reactor 83 is placed in the concrete formwork 90 of the ship 82. And the upper lid (not shown) is sealed, and then concrete is placed between the mold 90 with the lid and the nuclear reactor 83 to completely seal the nuclear reactor 83 in the concrete block, and the vessel 83 is left on the seabed. Alternatively, it may be left on land or in dam water for safety. The concrete formwork is also prepared for waste materials other than the nuclear reactor 83 that may be contaminated.

  FIG. 11 shows another embodiment. In this embodiment, since the ship 82 equipped with the nuclear reactor 83 can obtain electric power by power generation, the steam generation device 92 is mounted on the ship 82 and the steam containing the condensed nucleus is raised through the chimney 93 and the flow thereof is increased. It is designed to promote the occurrence of artificial rain by guiding it to the land sky.

  DESCRIPTION OF SYMBOLS 2 ... Reactor building 3 ... Reactor containment vessel 15 ... Suction means 25 ... Processing tank 26 ... Flow path 27 ... Flow control wall 28 ... Sprinkling device 29 ... Aeration device.

Claims (1)

A device that collects harmful substances, such as radioactive substances, leaking inside or outside the nuclear power generation facility and safely processes the collected substances. And a treatment tank in which harmful substances collected by the means are introduced through one end of the tank, and the treatment tank is arranged to form a meandering flow path for a long flow of water. Flow control walls, adsorbing means arranged to actively adsorb harmful substances in the meandering and final stages of the meandering flow path, and water from above into the meandering flow path. A device for collecting harmful substances leaked in a nuclear power generation facility having a watering device to be distributed and a gas diffusion device for adding fine gas as air from below into the meandering flow path, Is meandering and meandering In nuclear power plants, characterized in that those with are arranged in parallel a plurality of formulas obtained by deploying adsorption means floor as a unit are arranged in the plurality of parallel connection type is formed by arranging in series fashion Equipment for collecting and leaking harmful substances.

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