JP5849342B2 - Decontamination equipment and decontamination method for radioactive substances from radioactive contaminated water mixed with seawater - Google Patents

Description

  The present invention relates to a decontamination apparatus and a decontamination method for radioactive substances from radioactively contaminated water mixed with seawater.

  Non-Patent Document 1 describes a method for removing radioactive CP, FP, and TRU in radioactive polluted water using activated carbon carrying 8-hydroxyquinoline.

  Patent Document 1 describes a method of removing radioactive Cs in radioactively contaminated water using a porous inorganic carrier carrying ammonium phosphomolybdate (AMP), for example, alumina or silica.

Patent Document 2 describes a method of removing iodine using activated carbon supporting Br ₃ .

  Patent Document 3 describes that a radioactive substance insoluble in water is trapped in activated carbon, zeolite, filtered sand, carbon fiber-based material, cellulose-based material, or glass fiber-based material.

JP 2000-84418 A JP 2000-239190 A Japanese Patent Laid-Open No. 2002-267995

K. Motojima, et al., Annuals of Nuclear Energy, Vol. 5, pp.5-12 (1978)

Radioactive contaminated water sea water is mixed, the purification according to a general ion exchange resins are expected to be difficult. Therefore, a decontamination agent that replaces the ion exchange resin is required.

  The present invention decontaminates and purifies radioactive substances functionally and effectively even when the outflowing radioactive polluted water contains seawater without using a general ion exchange resin. It is an object of the present invention to provide a decontamination apparatus and a decontamination method that can provide low-level radioactive contamination water.

The present invention relates to radioactive contaminated water sea water is mixed, oxine (8-hydroxyquinoline), ammonium phosphomolybdate (AMP), was charged with activated carbon granules for the Br ₃ was supported respectively, radioactive CP (radioactive corrosion Products), FP (radioactive fission products), TRU (transuranic elements including uranium: U, Pu, Am, Cm), Cs (cesium), Iodine (iodine), and powder or solution of rhodizonate Is added to chelate radioactive Sr (strontium) and Ba (barium), coagulating and precipitating them with a precipitating agent, and radioactive polluted water treated with the primary purification treatment system to oxine (8-Hydroxyquinoline ), ammonium phosphomolybdate (AMP), to characterized in that it consists of secondary purification treatment system for passing liquid Br ₃ to purifying tower filled with loaded with coarse activated carbon, respectively Provides an apparatus for removing radioactive material from radioactive contaminated water sea water is mixed.

The present invention relates to radioactive contaminated water purification tower having a conductive outlet to derive inlet and purified water introducing radioactive contaminated water sea water is mixed, formed activated carbon carrying oxine (8-hydroxyquinoline) and oxine-supporting activated carbon layer, and AMP-supporting activated carbon layer formed in the activated carbon carrying ammonium phosphomolybdate (AMP), the three functions of the activated carbon layer between Br ₃ on activated charcoal layer formed in the activated carbon carrying Br ₃ combinations sea water, characterized in that a charcoal decontaminant layer laminated configured to provide a decontamination apparatus radioactive substances from radioactive contaminated water which is mixed.

The present invention also characterized in that provided an activated carbon layer is made of activated carbon decontaminant layer on the upstream side or / and downstream of the activated carbon decontaminant layer laminated structure by combining the three types of functional active carbon layer providing decontamination apparatus radioactive substances from radioactive contaminated water sea water is mixed to.

The present invention relates to radioactive contaminated water purification tower having a conductive outlet to derive inlet and purified water introducing radioactive contaminated water sea water is mixed, and oxine-supporting activated carbon carrying oxine (8-hydroxyquinoline) , and AMP-supporting activated carbon carrying ammonium phosphomolybdate, a Br ₃ impregnated combines three functions activated carbon with Br ₃ supported activated carbon was supported, activated carbon decontamination mixed bed layer constituted by mixing sea water, characterized in that provided to provide a decontamination apparatus radioactive substances from radioactive contaminated water which is mixed.

The present invention is also used decontamination apparatus of radioactive material described above, from a radioactive contaminated water sea water is mixed, with oxine-supporting activated carbon, radioactive CP (radioactive corrosion products), FP (radioactive fission products ), TRU (transuranic elements including uranium compounds: U, Pu, Am, to remove the Cm), with AMP-supporting activated carbon, to remove Cs radioactive, with Br ₃ on charcoal, to remove the radioactive iodine Provided is a method for decontaminating radioactive substances from radioactive water contaminated with characteristic seawater.

The present invention relates to radioactive contaminated water sea water is mixed, oxine (8-hydroxyquinoline), ammonium phosphomolybdate (AMP), impregnated with Br _3, respectively, was charged with fine activated carbon having supported thereon, radioactive CP (Radioactive corrosion products), FP (radioactive fission products), TRU (transuranic elements including uranium: U, Pu, Am, Cm), Cs (cesium), Iodine (iodine) are captured and rhodizonate ( RHOD) powder or solution is added to chelate with radioactive Sr (strontium) and Ba (barium), and they are coagulated and precipitated with a precipitating agent, followed by primary purification treatment, and further, the primary contaminated radioactive contaminated water is oxidized. (8-hydroxyquinoline), ammonium phosphomolybdate (AMP), since the secondary purification process for passing liquid Br ₃ to purifying tower filled with loaded with coarse activated carbon, respectively Characterized Rukoto provides method of removing radioactive materials from radioactive contaminated water sea water is mixed.

As described above, the present invention uses an activated carbon decontaminating agent constituted by combining three types of functional activated carbon without using a general ion exchange resin, and oxine-supported activated carbon is mixed with salts such as seawater. Removed radioactive CP (radioactive corrosion product), FP (radioactive fission product), TRU (uranium-containing transuranic elements: U, Pu, Am, Cm) to remove Cs radioactive, with Br ₃ on charcoal, it is possible to remove the radioactive iodine (iodine), the high level radioactive contaminated water sea water is mixed functionally effectively low-level radioactive contamination Can be water.

The figure which shows the structure of the Example of this invention. The figure which shows the structure of the decontamination apparatus of the radioactive substance which is an Example of this invention. The figure which shows the basic reaction formula of oxine charcoal. The figure which shows the basic structural formula of AMP. It shows the iodine removal principle of the activated carbon carrying br _3. It shows a wastewater treatment efficiency loaded with activated carbon br _3. The figure which shows the structure of the apparatus used for the performance confirmation of the activated carbon decontamination agent. The figure which shows the effect of the decontamination by an activated carbon decontaminant layer. The figure which shows that a radionuclide can be removed even if seawater components coexist.

  Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a device for removing radioactive material from radioactive contaminated water sea water is mixed to an embodiment of the present invention (hereinafter. Referred removing apparatus of radioactive material) is a diagram showing a configuration of.

  In FIG. 1, a radioactive substance removal apparatus 100 has a pretreatment system 1 constituted by an RO desalination system 11 having an RO membrane (reverse osmosis membrane), and a coagulation sedimentation separation tank 12, and performs coagulation sedimentation separation. And a secondary treatment system (secondary treatment purification system) 3 constituted by a radioactive sewage purification tower 13. A storage tank 5 for storing low-level contaminated water is connected to the downstream side of the secondary treatment system 3.

The pretreatment system 1 is configured as 1 ^st- step, and separates the desalted water 9 which is fresh water of radioactive contaminated water and the radioactive contaminated water 20 containing radioactive substances (fresh water is separated into radioactive substances).

The primary treatment system 2 and the secondary treatment system 3 are configured as 2 ^nd -step, and lower the level of separated radioactive contaminated water.

  The RO desalination system 11 includes an RO membrane. FIG. 1 shows a multi-stage RO desalination system, in which radioactive contaminated water is introduced into the lower part of the first stage RO desalination tower 11A, and separated radioactive contaminated water is derived from the upper part.

Radioactive contaminated water 4 sea water is mixed is introduced into the filtration apparatus 6 is separated into the filtration separator material 8 is highly radioactive and radioactive contaminated water 7.

  The demineralized water separated in the first-stage RO demineralization tower 11A is introduced into the next-stage RO demineralization tower 11B from the upper side, and further desalted. The desalted water subjected to the desalting treatment is led out as desalted water 9 which is fresh water, and the radioactive contaminated water in which the radioactive substance remains is introduced again into the first-stage RO desalting tower 11A.

  In this way, the radioactive contaminated water mixed with seawater is partly desalinated by the RO membrane, and the other part is the separated radioactive contaminated water 20. The separated radioactive contaminated water 20 is radioactive contaminated water containing separated radioactive substances and seawater components. This radioactively contaminated water is treated and purified by the primary treatment system 2 and the secondary treatment system 3. The primary treatment system 2 performs coagulation sedimentation treatment, and the secondary treatment system 3 performs ion adsorption treatment.

  The coagulation sedimentation separation tank 12 constituting the primary treatment system 2 includes a stirrer 21 and can stir the introduced separated radioactive contaminated water 20.

In the coagulation sedimentation separation tank 12, oxyn-supported activated carbon (KMAC) and ammonium phosphomolybdate (AMP), which are fine activated carbon loaded with oxine (8-Hydroxyquinoline), are loaded and loaded. AMP on activated carbon is activated carbon (AMP / AC), impregnated with Br _3, a powder or a solution of rhodizonate (RHOD) as Br ₃ on activated carbon (KBAC) and the adsorbent is activated carbon of fines was supported Processes sequentially. After this sequential charging, the coagulating precipitation agent is charged.

  In this manner, the above-described KMAC, AMP / AC, KBAC, and RHOD are sequentially charged, and the flocculant is charged and the stirring process of stirring with the stirrer 21 is performed. By these treatments, the radioactive material is coagulated and separated.

As described above, the radioactive contaminated water sea water is mixed, oxine (8-hydroxyquinoline), ammonium phosphomolybdate (AMP), impregnated with Br _3, respectively, was charged with fine activated carbon having supported thereon, of radioactive CP (radioactive corrosion product), FP (radioactive fission product), TRU (transuranic elements including uranium: U, Pu, Am, Cm), Cs (cesium), Iodine (iodine) are captured and rhodizonic acid A system is formed in which a primary purification treatment is performed by adding a powder or solution of the above and chelating with radioactive Sr (strontium) and Ba (barium) and aggregating them with a precipitating agent.

Further, the radioactive contaminated water sea water is mixed, oxine (8-hydroxyquinoline), ammonium phosphomolybdate (AMP), impregnated with Br _3, respectively, the activated carbon granules obtained by carrying charged, radioactive CP (radioactive Corrosion products), FP (Radiofission products), TRU (Transuranic elements including uranium: U, Pu, Am, Cm), Cs (cesium), Iodine (iodine) are captured, and rhodizonate (RHOD) Oxygen (8) is added to the radioactive contaminated water after adding the powder or solution of the above and chelating with radioactive Sr (strontium) and Ba (barium), coagulating and precipitating them with a precipitating agent, and further performing the primary purification treatment. -Hydroxyquinoline), ammonium phosphomolybdate (AMP), consists of secondary purification process for passing liquid Br ₃ to purifying tower filled with loaded with coarse activated carbon, respectively Method of removing radioactive materials from radioactive contaminated water water is mixed is formed.

  Two filter cloths or centrifuges 22 and 23 are provided on the downstream side of the coagulation sedimentation separation tank 12.

  From the lower part of the coagulation sedimentation separation tank 12, the coagulation sediment is led out, introduced into a filter cloth or a centrifugal separator 22 and taken out as one high level AC 24, and the separated liquid is fed to the coagulation sedimentation separation tank 12. Returned.

  The supernatant liquid of the coagulation sedimentation separation tank 12 is medium level contaminated water 26, and this supernatant liquid is introduced into another filter cloth or centrifuge 23 from the upper side. Another high level AC 24 is separated from the medium level contaminated water 26 introduced into the filter cloth or the centrifugal separator 23, and the radioactive contaminated water 27 from which the other high level AC 24 is separated is sent to the secondary treatment system 3. It is done.

  The functions of the above-described KMAC, AMP / AC, and KBAC functional charcoal and activated carbon (AC) will be described when the secondary processing system 3 is described.

  As described above, radioactive Sr. The primary radioactive decontamination of the radioactive substance including Ba is performed, and the radioactive substance remaining in the secondary treatment system 3 is removed.

  The secondary treatment system 3 includes a radioactive polluted water purification tower 13.

  In the case of this example, the radioactive polluted water purification tower 13 is composed of four radioactive contaminated water purification towers 13A-13D arranged in parallel. Each of the radioactive contamination purification towers 13A to 13D has the same configuration, and the radioactive contamination water 27 is introduced from above.

  In the present embodiment, the radioactive substance removing apparatus 100 which is the purification system described above can be applied to various elements shown in FIG. 9 to remove various radioactive substances.

  FIG. 2 shows one radioactive contamination purification tower 13. The radioactive contamination purification tower 13 is configured as a functional activated carbon-filled radioactive contamination water purification tower. Since radioactive substances are adsorbed and accumulated, the periphery thereof is shielded to prevent external leakage of radiation.

  Examples of radioactive substances expected to be mixed in the radioactively contaminated water 27 include I-131, Cs-134, Cs-137, CP, FP, and TRU. In advance, radioactive Sr, Ba and the like are separated by rhodizonate (RHOD) used in the primary treatment system.

Thus, FIG. 2, the decontamination apparatus of radioactive material from radioactive contaminated water purification tower 13 radioactive contaminated water sea water is an embodiment of the present invention is mixed with (hereinafter, referred to. Decontamination device) Show.

  As described above, the radioactive substance decontamination apparatus 200 includes the radioactive polluted water purification tower 13 (hereinafter referred to as a purification tower) serving as a main body.

The purification tower 13 is formed in a cylindrical shape, and includes an inlet 32 at the upper part and a outlet 33 at the lower part. The inlet port 32, is introduced level radioactive contaminated water 27 in the sea water is mixed, from the outlet port 33, purified water is derived as a low-level radioactive contaminated water 45.

Inside the purification tower 13, an oxine-supported activated carbon layer 41 formed of activated carbon loaded with and loaded with oxine (8-Hydroxyquinoline), ammonium phosphomolybdate (AMP) was deposited and AMP formed of loaded activated carbon. An activated carbon decontaminant layer 40 formed by combining three types of functional activated carbons with a Br ₃ supported activated carbon layer 43 formed of supported activated carbon to which the supported activated carbon layer 42 and Br ₃ are attached is provided. Any combination can be adopted.

Oxine-supporting activated carbon layer 41 is from a radioactive contaminated water 27 which sea water is mixed, radioactive CP, FP, the TRU functionally effectively removed. Therefore, it referred here as this layer a ^{1 ST} function charcoal [KMAC].

AMP on activated charcoal layer 42 carrying attach AMP is a radioactive contaminated water sea water is mixed to remove Cs radioactive from radioactive contaminated water which has passed through the 1 ^ST function charcoal. Therefore, it referred here this layer and ^{2 nd} function charcoal [AMP / AC].

Br ₃ on activated carbon layer 43 is a radioactive contaminated water sea water is mixed to remove radioactive iodine (Iodine) from passing through the 1 ^ST and 2 ^nd functional charcoal radioactive contaminated water. Therefore, here referred to as the layer a ^{3 rd} function charcoal [KBAC].

As described in patent documents and non-patent documents, it is known to decontaminate individual radioactive substances with a decontamination agent, but the activated carbon decontamination agent layer 40 is formed by combining three types of functional charcoal. it is, become practical as the first for decontamination of radioactive contaminated water sea water is mixed device. Report about what decontaminating radioactive materials from a radioactive contaminated water sea water is mixed so far has not been made.

These functions coal alone or with only two combinations are not effective for the decontamination of radioactive contaminated water sea water is mixed device. A combination of three functions charcoal described above it is important to configure the activated carbon decontaminant layer, this combination must be noted as a method for treating a radioactive contaminated water sea water is mixed.

  By using this activated carbon decontaminating agent layer 40 which is a combination of three kinds, it becomes possible to reduce the radioactivity of the high-level radioactive contaminated water 27 subjected to the primary treatment to about 1/100 to 1/1000. Decontamination efficiency can be further improved by controlling the amount and thickness of the agent layer 40 and the treatment flow rate.

Inside the purification column 13, the activated carbon layer 44 is provided on the downstream side of the 3 ^rd function charcoal, and to back each function charcoal. In this ^case, it referred to as the ^{4 th} activated carbon [AC]. By providing this backup layer, a four-layer activated carbon decontamination layer is formed. Other radioactive materials sea water is mixed with activated charcoal layer provided for this backup, for example, radioactive technetium (Tc-99) such as adsorption, it is possible to remove. Activated carbon layer 44 ^may be provided on the upstream side of the ^{1 st} function charcoal 41.

An example of the specification of the radioactive substance decontamination apparatus 200 is as follows.
[Specification example]

・ Purification capacity varies depending on how the activated carbon is used, the size of the purification tower, and the flow conditions.
-A remote system with a built-in purifier cartridge enables efficient decontamination even in a contaminated water storage tank.

Hereinafter, each functional charcoal will be described.
FIG. 3 shows a known basic reaction formula of oxine charcoal.
This embodiment, oxine charcoal [KMAC], CP radioactive contamination water sea water is mixed, it was decided to use to effectively decontaminate FP, the TRU.

FIG. 4 shows a known basic structural formula of AMP.
AMP has a high selective adsorptivity to Cs, and its alumina / silica support has a high Cs distribution ratio of 2000 to 6000. This embodiment is impregnated with AMP, activated carbon obtained by carrying sea water has to be used to effectively remove Cs radioactive contamination water mixed.

5 and 6 show the known functions of Br ₃ -supported activated carbon [KBAC].
In FIG. 5, the oxidation removal reaction of radioactive iodine is shown as follows.
[Radioactive iodine ( ^* I) oxidation removal reaction]
_{^{* I - + Br 3 -AC →}} * IBr 2 -AC + Br -
CH ₃ − ^* I + Br ₃ −AC → ^* IBr ₂ −AC + CH ₃ −Br

Figure 6 shows a wastewater treatment efficiency Br ₃ on activated charcoal carrying Br _3.
In this example, Br ₃ on activated charcoal carrying Br ₃ [KBAC] was set using a radioactive contamination of water iodine sea water is mixed to effectively remove.

  The performance confirmation of the activated carbon decontaminant layer 40 (decontamination agent) configured by combining the three types of functional charcoal of this example will be described.

FIG. 7 shows an outline of an apparatus used for confirming the performance of the activated carbon decontaminating agent.
2, the activated carbon layer [AC], the oxine-supported activated carbon layer [KMAC], the AMP-supported activated carbon layer [AMP / AC], and the Br _3- supported activated carbon layer [ KBAC] was formed to form an activated carbon decontamination layer, and an activated carbon layer [AC] was further added to form a decontamination agent consisting of four layers.

Washing water ( contained with detergent) collected from the area close to the site of the sample nuclear power plant accident was used.
[Contained radioactivity: Conversion date and time conversion] Multiple sample collection 1-131: min. 5,800-max. 22,000 Bq / L
Total Cs (Cs-134, 136, 137): min. 280-max. 750 Bq / L

Decontamination test 1) Test sample A plurality of the above samples are mixed for testing, and a sample containing 10% seawater is also prepared. I) Sample 500 ml
ii) 450 ml of sample + 50 ml of actual seawater (mixed with 10% seawater)
2) Column test (as shown in FIG. 7)
Column size: Inner diameter 20mmΦ, 300mm (long)
Filling decontamination agent: Filling in order of [KMAC + AMP / AC + KBAC + AC] from above Filling height 21cm, filling volume 66cc
All SVs: 5h ^-1
〔Test results〕

FIG. 8 shows the effect of decontamination by the activated carbon decontaminant layer as the activated carbon decontaminant. And FIG. 8 shows the gamma-ray spectrum before and after the measured decontamination process about a wastewater sample (+ seawater 10% mixing).

According to the activated carbon decontamination agent constituted by the combination of the functional activated carbon described above, a γ-ray spectrum as shown in FIG. I understand. The decontamination effect is as follows.
・ Removal of 99% or more of radioactive iodine ・ Removal of 97% to 99% of radioactive cesium ・ Functional and effective removal of CP, FP and TRU by using activated carbon with oxine

In the example described above, as shown in FIG. 2, the oxine-supporting activated carbon layer 41, the AMP-supporting coal layer 42, and the Br ₃ -supporting activated carbon layer 43 are arranged in this order in the purification tower 13. The same result can be expected even if the arrangement is not in this order and the arrangement is arbitrary. Moreover, the purification tower 1 may be comprised by connecting the three independent purification tower parts which accommodated each functional charcoal.

  Moreover, in this example, three types of functional charcoal are formed as a layer, and an activated carbon decontaminant layer is formed by combining these, but a mixed bed is formed by mixing three types of functional charcoal, Thus, the same effect can be expected by forming and using an activated carbon decontaminant layer.

Then, according to this arrangement, the radioactive contaminated water purification tower 13 provided with an outlet 33 for deriving an inlet port 32 and the purified water is introduced radioactive contaminated water sea water is mixed, oxine (8-hydroxyquinoline) Activated carbon decontamination mixture 40 comprising three types of functional activated carbons, activated carbon supporting ammonium phosphomolybdate and activated carbon supporting Br ₃ and mixing them. decontamination apparatus 200 of radioactive material from radioactive contaminated water sea water having a floor layer is mixed is formed.

In this example, depending on the type of radioactive substance mixed in the radioactively contaminated water and the amount of radioactivity, oxine (8-Hydroxyquinoline), which is a secondary treatment, is performed without performing the primary treatment that is the coagulation sedimentation method described above. , ammonium phosphomolybdate (AMP), the Br ₃ respectively impregnated, by passing liquid coarse activated carbon having supported thereon to fill the purification column, effectively radioactive substances from radioactive contaminated water sea water is mixed It is possible to provide a radioactive substance removing apparatus that removes the radioactive rays.

In this example, the activated carbon decontaminant layer was formed by providing various activated carbon layers on the upstream side and / or downstream side of the activated carbon decontaminant layer formed by combining the above-mentioned three types of functional activated carbon. providing decontamination apparatus radioactive substances from radioactive contaminated water sea water is mixed, characterized in.

  In FIG. 1, low-level contaminated water 45 led out from the filter cloth or centrifuges 22 and 23 and the radioactive purification tower 13 is stored in the storage tank 5 as low-level contaminated water. The low-level contaminated water decontaminated in this way is subjected to contamination check and discharged 48, or further advanced purification processing 47 is performed.

FIG. 9 shows elements that can be separated and removed by applying the coagulation precipitation method and functional activated carbon.
As is clear from FIG. 9, this example can remove various radionuclides even when seawater components coexist. Refer to FIG. 9 for applicable elements of KMAC, AMP / AC, KBAC, RHOD, and TR / AC.

DESCRIPTION OF SYMBOLS 1 ... Pretreatment system, 2 ... Primary treatment system (primary purification process), 3 ... Secondary treatment system (secondary purification treatment system), 4 ... Radioactive water, 5 ... Storage tank, 12 ... Coagulation sedimentation separation tank, DESCRIPTION OF SYMBOLS 13 ... Radioactive water purification tank (purification tower), 26 ... Medium level water, 27 ... Radioactive water, 32 ... Inlet, 33 ... Outlet, 40 ... Activated carbon decontamination layer (decontamination agent), 41 ... Oxin carrying activated carbon layer ^{(1 st} function charcoal [KMAC!), 42 ... AMP on activated carbon layer ^{(2 nd} function charcoal [AMP / AC]), 43 ... Br ₃ on activated carbon layer ^{(3 rd} function charcoal [KBAC]), 44 ... Activated carbon layer ^{(4 th} activated carbon [AC]), 100 ... removal of radioactive material device, 200 ... decontamination apparatus of radioactive material.

Claims (6)

Fine activated carbon carrying oxine (8-Hydroxyquinoline), ammonium phosphomolybdate (AMP), and Br ₃ is added to radioactive contaminated water mixed with seawater, and then radioactive CP (radioactive corrosion product), FP (Radioactive fission products), TRU (transuranic elements including uranium: U, Pu, Am, Cm), Cs (cesium), and Iodine (iodine) are captured and added with rosinic acid powder or solution. Primary purification treatment system that chelates Sr (strontium) and Ba (barium) and coagulates them with a precipitating agent. Furthermore, radioactive contaminated water treated with the primary purification treatment system is oxyxin (8-Hydroxyquinoline), phosphomolybdic acid ammonium (AMP), characterized in that it consists of secondary purification treatment system for passing liquid Br ₃ to purifying tower filled with coarse grains of the activated carbon having supported thereon respectively, seawater Removal apparatus of radioactive material from contaminating radioactive contaminated water. Oxin-supported activated carbon layer formed of activated carbon with 8-Hydroxyquinoline supported on a radioactive polluted water purification tower equipped with an inlet for introducing radioactive contaminated water mixed with seawater and an outlet for extracting purified water When, in combination with AMP activated carbon carrying layer formed by activated carbon was supported ammonium phosphomolybdate (AMP), the three functions of the activated carbon layer between Br ₃ on activated charcoal layer formed by activated carbon was supported Br ₃ A decontamination apparatus for radioactive substances from radioactive polluted water mixed with seawater, characterized by providing a layered activated carbon decontamination agent layer.   In Claim 2, the activated carbon decontaminating agent layer was comprised by providing the activated carbon layer in the upstream or / and downstream of the activated carbon decontaminating agent layer which laminated | stacked and comprised the said 3 types of functional activated carbon layer, It was characterized by the above-mentioned. Decontamination equipment for radioactive substances from radioactive contaminated water mixed with seawater. Oxin-supported activated carbon supporting ammonium (8-Hydroxyquinoline) and ammonium phosphomolybdate in a radioactive polluted water purification tower equipped with an inlet for introducing radioactive contaminated water mixed with seawater and an outlet for extracting purified water and AMP supported activated carbon was supported, combines three functions activated carbon with Br ₃ supported activated carbon was supported Br _3, characterized in that a charcoal decontamination mixed bed layer constituted by mixing Decontamination equipment for radioactive substances from radioactive contaminated water mixed with seawater. The radioactive substance decontamination device according to any one of claims 2 to 4 is used, and radioactive CP (radioactive corrosion product), FP (radioactive product) is produced from the radioactive polluted water mixed with seawater with the oxine-supporting activated carbon. fission products), TRU (transuranic elements such including uranium: U, Pu, Am, to remove the Cm), with AMP-supporting activated carbon, to remove Cs radioactive, with Br ₃ on charcoal, removing radioactive iodine A method for decontaminating radioactive substances from radioactively contaminated water mixed with seawater. Fine activated carbon carrying oxine (8-Hydroxyquinoline), ammonium phosphomolybdate (AMP), and Br ₃ is added to radioactive contaminated water mixed with seawater, and then radioactive CP (radioactive corrosion product), FP (Radioactive fission products), TRU (Uranium-containing transuranic elements: U, Pu, Am, Cm), Cs (cesium), Iodine (iodine) are captured, and rosidonic acid (RHOD) powder or solution is added Then, chelate with radioactive Sr (strontium) and Ba (barium), coagulate and precipitate them with a precipitating agent, and then perform primary purification treatment. be said in that it consists of secondary purification process for passing liquid ammonium (AMP), Br ₃ a to purifying tower filled with loaded with coarse activated carbon, respectively , Method of removing radioactive materials from radioactive contaminated water seawater is mixed.

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