KR20110116428A - System for treatment of waste resin - Google Patents

System for treatment of waste resin Download PDF

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KR20110116428A
KR20110116428A KR1020100035834A KR20100035834A KR20110116428A KR 20110116428 A KR20110116428 A KR 20110116428A KR 1020100035834 A KR1020100035834 A KR 1020100035834A KR 20100035834 A KR20100035834 A KR 20100035834A KR 20110116428 A KR20110116428 A KR 20110116428A
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waste
exchange resin
heavy water
resin
wastewater
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KR101102438B1 (en
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이세엽
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(주)한국원자력 엔지니어링
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G21F9/12—Processing by absorption; by adsorption; by ion-exchange
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/20—Disposal of liquid waste
    • G21F9/22—Disposal of liquid waste by storage in a tank or other container
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Environmental & Geological Engineering (AREA)
  • Treatment Of Water By Ion Exchange (AREA)

Abstract

폐수지 처리시 C-14 포집 폐수지가 중저준위 폐기물에 속하는 폐수지와 혼합되지 않도록 하여 중수로형 원전의 감속재계통에서 발생하는 고준위 방사성 폐수지의 발생량을 대폭 감소시킬 수 있고, 이로써 고준위 방사성 폐기물 처리비용을 절감할 수 있음과 동시에, 고준위 방사성 폐수지를 저장하기 위한 저장탱크의 용량 포화기간을 연장할 수 있는 중수로형 원전의 폐수지 처리시스템을 개시한다.
본 발명은, 중수로형 원전의 감속재계통 내에서 순환되는 감속재용 중수를 이온교환수지탑으로 통과시켜 양이온 방사성 핵종과 음이온 방사성 핵종을 제거하고, 상기 이온교환수지탑에서 발생되는 폐수지를 다른 계통에서 발생되는 폐수지와 함께 폐수지 저장탱크에 저장하도록 된 중수로형 원자력발전소의 폐수지 처리시스템에 있어서, 상기 폐수지 저장탱크와는 별개로 C-14 포집 폐수지 전용탱크를 더 구비하여, 상기 감속재계통의 이온교환수지탑에서 배출되는 폐수지는 C-14 포집 폐수지 전용 탱크에 저장하고, 다른 계통에서 배출되는 폐수지는 기존의 폐수지 저장탱크에 저장하도록 구성된 것이다.In the case of waste resin treatment, C-14 trapping waste resin is not mixed with waste resin belonging to low and middle level waste, which can greatly reduce the generation of high-level radioactive waste resin generated in the moderator system of the medium water reactor. In addition, the present invention discloses a wastewater treatment system for a heavy water reactor type nuclear power plant capable of extending the capacity saturation period of a storage tank for storing high-level radioactive wastewater.
The present invention, by passing the heavy water for moderator circulated in the moderator system of the heavy water reactor-type nuclear power plant to the ion exchange resin tower to remove the cation radionuclide and anion radionuclide, the waste resin generated in the ion exchange resin tower is generated in another system In the wastewater treatment system of the heavy water reactor-type nuclear power plant, which is to be stored in the wastewater storage tank together with the wastewater, which is further separated from the wastewater storage tank, further comprising a C-14 collecting waste resin dedicated tank, the moderator material system Wastewater from the ion exchange resin tower is stored in the C-14 collection waste tank, and wastewater from other systems is stored in the existing wastewater storage tank.

Description

중수로형 원자력발전소의 고준위 방사성 폐수지 발생 감소를 위한 폐수지 처리시스템{System for treatment of waste resin}Wastewater Treatment System for Reduction of High-Level Radioactive Waste Resin in Heavy Water Nuclear Power Plants

본 발명은 중수로형 원자력발전소의 폐수지 처리시스템에 관한 것으로, 더욱 상세하게는 감속재계통에서 발생되는 C-14 포집 고준위 방사성 폐수지가 열수송계통, 차폐냉각계통, 핵연료저장계통 등 그 외의 계통에서 발생하는 중저준위 방사성 폐수지와 혼합되지 않도록 C-14 포집 고준위 방사성 폐수지만 별도의 전용탱크에 분리 저장함으로써 중수로형 원자력발전소를 운영하면서 발생되는 고준위 방사성 폐수지의 관리가 용이하고 취급비용이 절감되며 고준위 방사성 폐수지의 발생량을 대폭 감소시킬 수 있는 중수로형 원자력발전소의 고준위 방사성 폐수지 발생 감소를 위한 폐수지 처리시스템에 관한 것이다.The present invention relates to a waste resin treatment system of a heavy water reactor type nuclear power plant. More specifically, the C-14 trapping high-level radioactive waste resin generated from the moderator material is generated in other systems such as heat transportation system, shielded cooling system, nuclear fuel storage system, and the like. C-14 captures high-level radioactive wastewater so that it is not mixed with low- and medium-low-level radioactive wastewater, but separates and stores it in a separate dedicated tank, making it easy to manage high-level radioactive wastewater generated by operating a medium-sized nuclear power plant, reducing handling costs, and high-level radioactive wastewater. The present invention relates to a wastewater treatment system for reducing the generation of high-level radioactive wastewater in heavy water reactor-type nuclear power plants that can significantly reduce the amount of land generated.

중수로형 원자력발전소(원전)를 운영하면서 감속재계통, 열수송계통, 차폐냉각계통, 핵연료저장계통 등에서 발생되는 폐수지는, 원전설계 당시 중저준위 방사성 폐기물로 분류됨으로써 폐수지 저장탱크에 저장하여 관리하는데 별다른 어려움이 없었으며, 폐수지를 취급함에 있어서도 많은 비용이 필요치 않았으나, 최근 폐수지에 함유된 음이온 방사성 탄소중, C-14의 위험성이 매우 높다는 것이 알려지면서 폐수지의 C-14 농도에 따른 폐기물 처분 제한치를 규정하기에 이르렀다.Wastewater generated from deceleration material system, heat transportation system, shielded cooling system, nuclear fuel storage system, etc. during the operation of a heavy water reactor type nuclear power plant (nuclear power plant) is classified as a low-low level radioactive waste at the time of nuclear power plant design, which makes it difficult to store and manage it in the waste water storage tank. Although there was no cost for handling waste resin, it was recently known that the risk of C-14 among the anionic radiocarbons contained in waste resin was very high. Reached.

이에 따라, 현재 운영되고 있는 중수로형 원자력발전소의 폐수지 저장탱크에 저장된 폐수지의 C-14 농도를 측정한 결과, 중저준위 폐기물의 처분 제한치보다 높은 것으로 나타남에 따라 폐수지 저장탱크에 대한 관리를 기존의 중저준위 방사성 폐기물 처리방법에서 고준위 방사성 폐기물 처리방법으로 전환하게 되었다.Accordingly, as a result of measuring the C-14 concentration of the waste resin stored in the wastewater storage tank of the currently operated heavy water reactor-type nuclear power plant, it was found to be higher than the disposal limit of the low and medium-level wastes. The transition from low and low level radioactive waste treatment to high level radioactive waste treatment has been made.

그러나, 고준위 방사성 폐기물 관리는 중저준위 방사성 폐기물 관리에 비하여 관리상의 어려움이 많고 취급에 따른 비용이 증가하는 문제가 있으며, 최적의 처리방안이 도출되기 전까지 폐수지를 대형의 저장탱크에 계속 저장·관리하고 있으나, 원자력발전소의 수명 연장으로 저장탱크의 용량부족이 예상되어 이의 대처방안이 시급히 요구되고 있다.However, high level radioactive waste management has more management difficulties and higher handling costs than low and low level radioactive waste management, and waste resins are continuously stored and managed in large storage tanks until the optimal treatment is found. As a result, the capacity of storage tanks is expected to be shortened due to the long life of nuclear power plants.

통상적으로, 중수로형 원전에서 C-14 방사성 핵종은 감속재계통, 열수송계통, 차폐냉각계통, 핵연료저장계통 등 여러 계통에서 발생하나, 감속재계통 내에 존재하는 O-17의 O(n,a)C 반응으로 전체의 95%가 감속재계통에서 생성된다.Typically, C-14 radionuclides in heavy water reactors occur in various systems such as moderator, heat transport, shielded cooling, and fuel storage systems, but O (n, a) C of O-17 in moderators The reaction generates 95% of the total in the moderator.

감속재계통은 크게 감속재 주계통과 감속재 정화계통으로 구분되는 것으로, 감속재 주계통에는 약 260톤의 감속재용 중수가 장전되어 있으며, 이 감속재는 핵연료(천연우라늄)의 핵분열이 잘 일어나도록 속중성자를 열중성자로 변환시키는 기능을 한다. 또한, 감속재는 반응도 조절을 위해 독 물질(보론 또는 가돌리늄)을 계통에 주입할 필요가 있을 때 매개체로도 사용된다. 이와 같이 감속재용 중수는 냉각, 정화 및 반응도 조절에 사용되는 물질의 농도 조절을 위하여 감속재계통 내에서 순환된다.The moderator material system is largely divided into moderator material system and moderator material purification system. The moderator material system is loaded with about 260 ton heavy water for moderator material, and the moderator has thermal neutrons to facilitate nuclear fission of nuclear fuel (natural uranium). Converts to. Moderators are also used as mediators when it is necessary to inject a poison (boron or gadolinium) into the system for responsiveness control. In this way, the heavy water for moderators is circulated in the moderator system for the concentration control of materials used for cooling, purification and reactivity control.

감속재 정화계통은 감속재 주계통을 보조하는 계통으로 중수의 순도를 유지함으로써 중수의 방사 분해를 줄이고 상층기체의 과도한 중수소 축적을 방지한다. 또한, 중수 내의 불순물을 제거하고 pH를 조절하여 기기 및 배관의 부식을 최소화시키며, 반응도 조절을 위해서 사용된 붕소나 가돌리늄의 농도를 조절하는 기능을 수행한다.The moderator material purification system is a system to assist the moderator material main system to maintain the purity of heavy water to reduce the radiolysis of heavy water and prevent excessive deuterium accumulation in the upper gas. In addition, it removes impurities in heavy water and adjusts the pH to minimize corrosion of equipment and pipes, and controls the concentration of boron or gadolinium used for the reactivity control.

도 1은 중수로형 원전에서 발생되는 폐수지의 처리과정을 설명하기 위한 종래의 감속재 정화계통을 계략적으로 나타낸 구성도로서, 도시된 바와 같이 감속재 정화계통은, 열교환기(10), 여과기(20) 및 이온교환수지탑(30)을 구비하며, 감속재 주계통으로부터 공급되는 중수가 열교환기(10), 여과기(20) 및 이온교환수지탑(30)을 차례로 통과하여 정화된 후, 다시 감속재 주계통으로 공급되는 순환구조로 되어 있다.1 is a block diagram schematically illustrating a conventional moderator purification system for explaining a process of waste resin generated in a heavy water reactor type nuclear power plant, as shown in the moderator purification system, a heat exchanger 10, a filter 20 And an ion exchange resin tower (30), wherein the heavy water supplied from the moderator main system passes through the heat exchanger (10), the filter (20), and the ion exchange resin tower (30), and then is purified. It has a circulation structure supplied by.

또한, 상기 이온교환수지탑(30) 내에는, 양이온 및 음이온의 혼상 이온교환수지가 수용되어 중수로부터 양이온 및 음이온 방사성 핵종을 제거하도록 구성된 것으로, 감속재계통 내에 존재하는 O-17의 O(n,a)C 반응에 의해 생성된 C-14는 음이온 방사성 핵종이므로 혼상 이온교환 수지탑(30)의 통과시 혼상 이온교환수지에 포집되어 제거된다.In addition, in the ion exchange resin tower 30, a mixed ion exchange resin of cations and anions is accommodated to remove cations and anion radionuclides from heavy water, and O (n, a) The C-14 produced by the C reaction is an anion radionuclide, and is thus trapped and removed by the interphase ion exchange resin upon passage of the interphase ion exchange resin tower 30.

혼상 이온교환수지는 일정기간 사용되면 새것으로 교체되고, 사용 후의 폐수지는 폐수지 저장탱크(40)로 배출되어 보관되며, 폐수지 저장탱크(40)에는 감속재계통외에도 열수송계통, 차폐냉각계통, 핵연료저장계통 등 다른 계통에서 발생하는 폐수지도 함께 저장된다. The mixed phase ion exchange resin is replaced with a new one when used for a certain period of time, and the waste resin after use is discharged and stored in the waste resin storage tank 40, and the waste resin storage tank 40 has a heat transportation system, a shielded cooling system, Wastewater from other systems, such as the fuel storage system, is also stored.

이와 같이, 종래에는 혼상 이온교환 수지탑(30) 내에 양이온교환수지와 음이온교환수지가 혼합된 혼상 이온교환수지가 수용되어, 중수에 함유된 양이온 방사성 핵종과, C-14를 포함한 음이온 방사성 핵종을 모두 제거하도록 되어 있고, 또한 폐수지 처리시 C-14 성분이 포집된 폐수지가 저장탱크(40)에 그대로 저장되는 것이므로, 폐수지 저장탱크(40)에는 다른 계통에서 발생되는 중저준위 방사성 폐기물로 분류된 폐수지와, 감속계계통에서 발생되는 고준위 방사성 폐기물로 분류된 C-14 포집 폐수지가 함께 혼합되어 결과적으로 모두 고준위 방사성 폐기물이 되어 버린다.As described above, conventionally, a mixed phase ion exchange resin in which a cation exchange resin and an anion exchange resin are mixed is accommodated in the mixed phase ion exchange resin tower 30 to contain a cation radionuclide contained in heavy water and an anion radionuclide including C-14. Since the waste resin is collected as it is, and the waste resin collected in the C-14 component during the waste resin treatment is stored in the storage tank 40 as it is, the waste resin storage tank 40 is classified as a low-low level radioactive waste generated in other systems Waste resins and C-14 capture waste resins classified as high-level radioactive wastes from the deceleration system are mixed together, resulting in high-level radioactive wastes.

이로 인해 고준위 방사성 폐기물에 속하는 폐수지의 양을 증가시키는 문제와, 고준위 방사성 폐기물 증가로 인한 관리상의 어려움 및 취급비용의 상승을 초래하는 문제가 있다.As a result, there is a problem of increasing the amount of waste resins belonging to high-level radioactive waste, a problem of management difficulties and an increase in handling costs due to the increase of high-level radioactive waste.

본 발명은 상기와 같은 종래의 문제를 해결하기 위한 것으로, 그 목적은 감속재계통에서 발생되는 폐수지는 별도로 제작한 C-14 포집 폐수지 전용탱크에 저장하고, 열수송계통, 차폐냉각계통, 핵연료저장계통 등의 다른 계통에서 발생되는 폐수지는 기존의 폐수지 저장탱크에 저장하여 고준위 방사성 폐기물로 취급되는 C-14 포집 폐수지가 중저준위 방사성 폐기물로 취급되는 다른 폐수지와 혼합되지 않도록 함으로써 중수로형 원자력발전소를 운영하면서 발생되는 고준위 방사성 폐수지의 양을 대폭 감소시킬 수 있고, 이로 인해 고준위 방사성 폐수지의 관리가 용이하고 취급비용이 절감되며, 원자력발전소의 수명 연장에 따른 저장탱크의 용량 포화에 대비할 수 있는 중수로형 원자력발전소의 고준위 방사성 폐수지 발생 감소를 위한 폐수지 처리시스템을 제공하는데 있다.The present invention is to solve the conventional problems as described above, the purpose of the waste resin generated in the moderator material system is stored in the C-14 collection waste resin dedicated tank made separately, heat transport system, shielded cooling system, nuclear fuel storage Wastewater from other systems, such as the grid, is stored in the existing wastewater storage tanks so that the C-14 trapping wastewater treated as high-level radioactive waste does not mix with other wastewater treated as low-level radioactive waste. It is possible to drastically reduce the amount of high-level radioactive wastes generated during operation, which facilitates the management of high-level radioactive wastes, reduces handling costs, and prepares for the saturation of storage tanks due to the extended life of nuclear power plants. Waste Balance Treatment System for Reduction of High Level Radioactive Waste Balance in Nuclear Power Plants To provide the system.

또한, 본 발명의 다른 목적은 혼상 이온교환수지탑을 양이온교환수지탑과 음이온교환수지탑으로 분리형성하여, 중수에 포함된 핵종 중에서도 중저준위 방사성 폐기물로 분류되는 양이온 방사성 핵종은 양이온교환 수지탑에서 제거하고, 고준위 방사성 폐기물로 분류되는 C-14가 포함된 음이온 방사성 핵종은 음이온교환 수지탑에서 제거함으로써 감속재계통에서 발생하는 C-14 포집 고준위 방사성 폐수지의 양을 더욱 감소시킬 수 있으며, 이로써 고준위 방사성 폐수지의 관리가 용이하고 취급에 따른 처리비용을 더욱 절감할 수 있는 중수로형 원자력발전소의 고준위 방사성 폐수지 발생 감소를 위한 폐수지 처리시스템을 제공하는데 있다.In addition, another object of the present invention is to separate the mixed phase ion exchange resin tower into a cation exchange resin tower and an anion exchange resin tower, the cation radionuclides which are classified as low and medium-level radioactive waste among the nuclei contained in the heavy water is removed from the cation exchange resin tower In addition, anion radionuclides containing C-14 classified as high-level radioactive waste can be further removed from the anion-exchange resin tower to further reduce the amount of C-14 trapped high-level radioactive wastewater from the moderator material system, thereby increasing the high-level radioactive wastewater. The present invention is to provide a waste balance treatment system for the reduction of high-level radioactive waste balance of heavy water reactor-type nuclear power plants that can easily manage the land and reduce the treatment cost of handling.

상기의 목적을 달성하기 위한 본 발명은, 중수로형 원전의 감속재계통 내에서 순환되는 감속재용 중수를 이온교환수지탑으로 통과시켜 양이온 방사성 핵종과 음이온 방사성 핵종을 제거하고, 상기 이온교환수지탑에서 발생되는 폐수지를 다른 계통에서 발생되는 폐수지와 함께 폐수지 저장탱크에 저장하도록 된 중수로형 원자력발전소의 폐수지 처리시스템에 있어서, 상기 폐수지 저장탱크와는 별개로 C-14 포집 폐수지 전용탱크를 더 구비하여, 상기 감속재계통의 이온교환수지탑에서 배출되는 폐수지는 C-14 포집 폐수지 전용 탱크에 저장하고, 다른 계통에서 배출되는 폐수지는 기존의 폐수지 저장탱크에 저장하도록 된 중수로형 원자력발전소의 고준위 방사성 폐수지 발생 감소를 위한 폐수지 처리시스템에 특징이 있다. The present invention for achieving the above object, by passing the heavy water for moderator circulated in the moderator system of the heavy water reactor-type nuclear power plant to the ion exchange resin tower to remove the cation radionuclide and anion radionuclide, generated in the ion exchange resin tower In the waste water treatment system of a heavy water reactor-type nuclear power plant configured to store the waste resin together with waste resins generated by other systems in a waste water storage tank, a C-14 collection waste water tank dedicated to the waste water storage tank is separately provided. In addition, the waste resin discharged from the ion exchange resin tower of the moderator material system is stored in the C-14 capture waste resin dedicated tank, waste water discharged from the other system is stored in the existing waste resin storage tank of heavy water reactor-type nuclear power plant It is characterized by the waste resin treatment system to reduce the generation of high level radioactive waste resin.

또한 본 발명은, 상기 이온교환수지탑을, 양이온교환수지만 수용하는 양이온교환수지탑과, 음이온교환수지만 수용하는 음이온교환수지탑으로 분리구성하여 중수를 순차로 통과시킴으로써 상기 양이온교환수지탑에서는 중수에 포함된 양이온방사성 핵종만을 제거하고, 상기 음이온교환수지탑에서는 중수에 포함된 C-14 포함 음이온방사성 핵종만을 제거하며, 상기 양이온교환수지탑으로부터 배출되는 폐수지는 상기 기존의 폐수지 저장탱크에 저장하고 상기 음이온교환수지탑으로부터 배출되는 C-14 포집 폐수지는 상기 C-14 포집 폐수지 전용탱크에 저장하도록 된 중수로형 원자력발전소의 고준위 방사성 폐수지 발생 감소를 위한 폐수지 처리시스템에 특징이 있다.In addition, the present invention is separated into a cation exchange resin tower containing only the cation exchange resin and an anion exchange resin tower containing only the anion exchange resin, and the heavy water is sequentially passed through the ion exchange resin tower. Only remove the cation radionuclides contained in the heavy water, the anion exchange resin tower to remove only C-14 containing anion radionuclides contained in the heavy water, waste resin discharged from the cation exchange resin tower to store the existing waste resin The C-14 capture waste resin, which is stored in a tank and discharged from the anion exchange resin tower, is stored in the C-14 capture waste resin dedicated tank, characterized by a waste resin treatment system for reducing the generation of high-level radioactive waste resin in a heavy water reactor type nuclear power plant. There is this.

이러한 특징적 구성을 가지는 본 발명에 의하면, 중수로형 원전을 운행할 때 각 계통에서 발생하는 폐수지중, 열수송계통, 차폐냉각계통, 핵연료저장계통 등에서 발생되고 중저준위 방사성 폐기물로 분류되는 폐수지는 기존의 폐수지 저장탱크에 저장하고, 감속계계통에서 발생되고 고준위 방사성 폐기물로 분류되는 폐수지는 C-14 포집 폐수지 전용탱크에 저장함에 따라, 종래와 같이 C-14 포집 폐수지가 중저준위 방사성 폐기물로 분류되는 다른 폐수지와 혼합됨으로써 고준위 방사성 폐기물 처리량이 증가되는 문제를 해결할 수 있고, 또한 C-14 포집 폐수지만을 별도로 저장하게 되므로 관리가 용이하고 폐기물 취급비용을 절감할 수 있는 유용한 발명인 것이다.According to the present invention having such a characteristic configuration, the waste resin generated in each system when operating the heavy water reactor-type nuclear power plants, heat transport system, shielded cooling system, nuclear fuel storage system, etc., and the waste resin which is classified as a low-low level radioactive waste is a conventional wastewater Waste papers stored in the paper storage tank and generated in the deceleration system and classified as high-level radioactive waste are stored in the C-14 collection waste-only tank, so that other C-14 collected waste resins are classified as low-low level radioactive waste as conventionally. By mixing with the waste resin it is possible to solve the problem of increasing the high-level radioactive waste throughput, and because only the C-14 collected waste water is stored separately, it is a useful invention that can be easily managed and reduce the waste handling cost.

또한 본 발명은, 감속재계통의 이온교환수지탑이 양이온 교환수지탑과 음이온 교환수지탑으로 분리되어 중수에 생성된 양이온 방사성 핵종과 음이온 방사성 핵종이 분리제거됨에 따라, 종래의 양이온-음이온 혼상 이온교환수지탑에서 폐수지 처리시 고준위 방사성 폐기물로 분류되는 C-14 포집 음이온 방사성 폐수지와 중저준위 방사성 폐기물로 분류되는 양이온 방사성 폐수지가 혼합됨으로써 발생하는 고준위 방사성 폐수지 처리량에 비하여, 양이온 방사성 폐수지 발생량만큼 C-14 포집 폐수지의 처리량을 감소시킬 수 있다. 따라서 고준위 방사성 폐기물의 처리량이 더욱 감소되므로 관리가 더욱 용이하고 폐기물 취급비용이 보다 절감되는 유용한 발명이다.In addition, according to the present invention, as the ion exchange resin tower of the moderator system is separated into a cation exchange resin tower and an anion exchange resin tower, the cation radionuclide and anion radionuclide generated in heavy water are separated and removed, and thus, a conventional cation-anion mixed phase ion exchange. When the waste resin is treated in the resin tower, the amount of cation radioactive waste resin generated is higher than that of the high-level radioactive waste resin generated by mixing C-14 trapping anion radioactive waste classified as high-level radioactive waste and cationic radioactive waste classified as low-level radioactive waste. It can reduce the throughput of C-14 capture waste resin. Therefore, since the throughput of the high-level radioactive waste is further reduced, it is a useful invention that is easier to manage and further reduces the waste handling cost.

도 1은 종래에 따른 중수로형 원전의 폐수지 처리시스템을 계략적으로 나타낸 구성도.
도 2는 본 발명의 제1 실시예에 따른 중수로형 원전의 폐수지 처리시스템을 계략적으로 나타낸 구성도.
도 3은 본 발명의 제2 실시예에 따른 중수로형 원전의 폐수지 처리시스템을 계략적으로 나타낸 구성도.1 is a configuration diagram schematically showing a waste resin treatment system of a heavy water reactor-type nuclear power plant according to the prior art.
Figure 2 is a schematic view showing a waste resin treatment system of a heavy water reactor-type nuclear power plant according to a first embodiment of the present invention.
Figure 3 is a schematic view showing a waste resin treatment system of a heavy water reactor-type nuclear power plant according to a second embodiment of the present invention.

이하, 본 발명의 바람직한 실시예를 첨부도면에 의거하여 상세하게 설명한다. 도 2는 본 발명의 제1 실시예에 따른 폐수지 처리리스템을 나타낸 것으로, 도시된 바와 같이, 중수로형 원전의 감속재 정화계통은, 열교환기(100), 여과기(200) 및 혼상이온교환수지탑(300)을 구비하며, 감속재 주계통으로부터 공급되는 중수가 열교환기(100), 여과기(200) 및 이온교환수지탑(300)을 차례로 통과하여 정화된 후, 다시 감속재 주계통으로 공급되는 순환구조로 되어 있다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 2 shows a waste resin treatment system according to a first embodiment of the present invention, as shown, the decelerating material purification system of the heavy water reactor-type nuclear power plant, the heat exchanger 100, the filter 200 and the mixed-phase ion exchange resin tower It is provided with a 300, the heavy water supplied from the moderator main system passes through the heat exchanger 100, the filter 200 and the ion exchange resin tower 300 is purified, and then the circulation structure is supplied to the moderator main system again It is.

또한, 상기 이온교환수지탑(300) 내에는, 양이온 및 음이온의 혼상 이온교환수지가 수용되어 중수로부터 양이온 및 음이온 방사성 핵종을 제거하도록 구성된 것으로, 감속재계통 내에 존재하는 O-17의 O(n,a)C 반응에 의해 생성된 C-14는 음이온 방사성 핵종이므로 이온교환 수지탑(300)의 통과시 혼상 이온교환수지에 포집되어 제거된다.In addition, in the ion exchange resin tower 300, a mixed ion exchange resin of cations and anions is accommodated to remove cations and anion radionuclides from heavy water, and O (n, a) The C-14 produced by the C reaction is an anion radionuclide, and is thus trapped and removed by the mixed phase ion exchange resin when passing through the ion exchange resin tower 300.

혼상 이온교환수지는 일정기간 사용되면 새것으로 교체되는 것으로, 사용 후의 폐수지는 고준위 방사성 폐기물로 분류되는 것이므로 별도로 제작된 C-14 포집 폐수지 전용탱크(500)로 배출되어 보관되고, 감속재계통 외의 열수송계통, 차폐냉각계통, 핵연료저장계통 등 다른 계통에서 발생되는 폐수지는 기존의 폐수지 저장탱크(400)에 저장하도록 구성되어 있다. The mixed phase ion exchange resin is replaced with a new one after a certain period of time. Since the waste resin after use is classified as a high-level radioactive waste, it is discharged and stored in the C-14 collection waste tank dedicated tank 500, which is separately manufactured. Waste resins generated from other systems, such as transport systems, shielded cooling systems, nuclear fuel storage systems, is configured to be stored in the existing waste resin storage tank (400).

이와 같이, 감속재계통의 이온교환 수지탑(300)으로부터 배출되는 고준위 방사성 C-14 포집 폐수지가 C-14 포집 폐수지 전용탱크(500)에 저장됨에 따라, 열수송계통, 차폐냉각계통, 핵연료저장계통 등의 다른 계통에서 발생되는 중저준위 방사성 폐수지와 혼합되어 고준위 방사성 폐기물의 처리량이 증가되는 것을 방지할 수 있고, 또한 C-14 포집 폐수지 전용탱크(500)에 별도로 저장시킨 C-14 포집 폐수지만 고준위 방사성 폐기물에 준하여 처리하게 되므로, 관리가 용이하고 취급비용을 절감할 수 있다.As such, as the high-level radioactive C-14 capture waste resin discharged from the ion exchange resin tower 300 of the moderator material system is stored in the C-14 capture waste resin tank 500, a heat transport system, a shield cooling system, and a nuclear fuel storage system. It can be mixed with low and medium-level radioactive waste resin generated from other systems such as the system to prevent the increase in throughput of high-level radioactive waste, and also stored separately in the C-14 collection waste tank dedicated tank (C-14). However, because it is treated according to high-level radioactive waste, it is easy to manage and reduce the handling cost.

도 3은 본 발명의 제2 실시예를 나타낸 것으로, 도시된 바와 같이, 중수로형 원전의 감속재 정화계통은, 열교환기(110), 여과기(210), 양이온교환수지탑(310) 및 음이온교환수지탑(320)을 구비하며, 감속재 주계통으로부터 공급되는 중수가 열교환기(110), 여과기(210), 양이온교환수지탑(310) 및 음이온교환수지탑(320)을 차례로 통과하여 정화된 후, 다시 감속재 주계통으로 공급되는 순환구조로 되어 있다.Figure 3 shows a second embodiment of the present invention, as shown, the moderator purification system of the heavy water reactor nuclear power plant, heat exchanger 110, filter 210, cation exchange resin tower 310 and anion exchange resin The tower 320 is provided, and the heavy water supplied from the moderator main system passes through the heat exchanger 110, the filter 210, the cation exchange resin tower 310, and the anion exchange resin tower 320, and then is purified. In addition, it has a circulation structure that is supplied to the moderator system.

또한, 상기 양이온교환수지탑(310) 내에는, 양이온교환수지가 수용되어 중수로부터 양이온 방사성 핵종을 제거하도록 구성되고, 상기 음이온교환수지탑(320) 내에는, 음이온교환수지가 수용되어 중수로부터 음이온 방사성 핵종을 제거하도록 구성된 것으로, 감속재계통 내에 존재하는 O-17의 O(n,a)C 반응에 의해 생성된 C-14는 음이온 방사성 핵종이므로 음이온교환수지탑(320)의 통과시 음이온교환수지에 포집되어 제거된다.In addition, in the cation exchange resin tower 310, a cation exchange resin is accommodated and configured to remove cation radionuclides from heavy water, and in the anion exchange resin tower 320, an anion exchange resin is accommodated and anions from heavy water. It is configured to remove the radionuclide, and C-14 produced by the O (n, a) C reaction of O-17 present in the moderator material is an anion radionuclide so that the anion exchange resin when passing through the anion exchange resin tower 320 Is captured and removed.

양이온 및 음이온교환수지는 일정기간 사용되면 새것으로 교체되는 것으로, 사용 후의 양이온교환수지탑(310)의 폐수지는 중저준위 방사성 폐기물로 분류되므로 기존의 폐수지 저장탱크(410)로 배출되어 저장되고, 음이온교환수지탑(320)의 폐수지는 고준위 방사성 폐기물로 분류되므로 별도로 제작한 C-14 포집 폐수지 전용탱크(510)로 배출되어 저장되며, 감속재계통 외의 열수송계통, 차폐냉각계통, 핵연료저장계통 등 다른 계통에서 발생하는 폐수지는 양이온교환수지탑(310)으로부터 배출되는 폐수지와 함께 기존의 폐수지 저장탱크(410)에 저장하도록 구성되어 있다. The cation and anion exchange resin is to be replaced with a new one if used for a certain period of time, since the waste resin of the cation exchange resin tower 310 after use is classified as a medium-low level radioactive waste is discharged and stored in the existing waste resin storage tank 410, anion Since the waste resin of the exchange resin tower 320 is classified as high-level radioactive waste, it is discharged and stored as a separate C-14 capture waste resin tank 510, which is separately manufactured, and is stored in a heat transport system, a shielded cooling system, a nuclear fuel storage system, etc. Waste resins generated in other systems are configured to be stored in the existing waste resin storage tank 410 together with the waste resin discharged from the cation exchange resin tower 310.

이와 같이, 감속재계통의 음이온교환 수지탑(320)으로부터 배출되는 C-14 포집 폐수지만 C-14 포집 폐수지 전용탱크(510)에 저장됨에 따라, 양이온교환수지탑(310)으로부터 배출되는 폐수지 및 열수송계통, 차폐냉각계통, 핵연료저장계통 등의 다른 계통에서 발생되는 중저준위 방사성 폐수지와 혼합되는 것이 방지되므로 고준위 방사성 폐기물의 발생량을 대폭 감소시킬 수 있다.As such, only the C-14 capture wastewater discharged from the anion exchange resin tower 320 of the moderator material system is stored in the C-14 capture waste resin tank 510, and thus, the waste resin discharged from the cation exchange resin tower 310. And low and low level radioactive waste resins generated from other systems such as heat transport systems, shielded cooling systems, and nuclear fuel storage systems, thereby significantly reducing the generation of high level radioactive waste.

또한, C-14 포집 폐수지 전용탱크(510)에 저장된 C-14 포집 폐수지만 관리하면 되므로, 고준위 방사성 폐기물의 관리가 더욱 용이하고 취급시의 비용도 더욱 절감할 수 있다.In addition, since only the C-14 collection waste water stored in the C-14 collection waste resin tank 510 may be managed, the management of high-level radioactive waste may be easier and the cost of handling may be further reduced.

지금까지 설명된 실시예는 본 발명의 바람직한 실시예를 설명한 것에 불과하고, 본 발명의 권리범위는 설명된 실시예에 한정되는 것은 아니며, 본 발명의 기술적 사상과 특허청구범위 내에서 이 분야의 당업자에 의하여 다양한 변경, 변형 또는 치환이 가능할 것이며, 그와 같은 실시예들은 본 발명의 범위에 속하는 것으로 이해되어야 한다.It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the present invention and not to be construed as limiting the scope of the present invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100,110 : 열교환기 200,210 : 여과기
300,310,320 : 이온교환수지탑 400,410 : 폐수지 저장탱크
500,510 : C-14 포집 폐수지 전용탱크100,110: heat exchanger 200,210: filter
300,310,320: ion exchange resin tower 400,410: waste resin storage tank
500,510: C-14 Collection Waste Tank

Claims (2)

중수로형 원전의 감속재계통 내에서 순환되는 감속재용 중수를 이온교환수지탑으로 통과시켜 양이온 방사성 핵종과 음이온 방사성 핵종을 제거하고, 상기 이온교환수지탑에서 발생되는 폐수지를 다른 계통에서 발생되는 폐수지와 함께 폐수지 저장탱크에 저장하도록 된 중수로형 원자력발전소의 폐수지 처리시스템에 있어서,
상기 폐수지 저장탱크와는 별개로 C-14 포집 폐수지 전용탱크를 더 구비하여, 상기 감속재계통의 이온교환수지탑에서 배출되는 폐수지는 C-14 포집 폐수지 전용 탱크에 저장하고, 다른 계통에서 배출되는 폐수지는 기존의 폐수지 저장탱크에 저장하도록 됨을 특징으로 하는 중수로형 원자력발전소의 고준위 방사성 폐수지 발생 감소를 위한 폐수지 처리시스템. Heavy water for moderators circulated in the moderator system of the heavy water reactor-type nuclear power plant is passed through the ion exchange resin tower to remove the cation radionuclide and anion radionuclide, and the waste resin generated in the ion exchange resin tower In the wastewater treatment system of the heavy water reactor-type nuclear power plant, which is to be stored together in the wastewater storage tank,
In addition to the waste resin storage tank is further provided with a C-14 capture waste resin dedicated tank, the waste resin discharged from the ion exchange resin tower of the moderator material is stored in the C-14 capture waste resin dedicated tank, and in another system Discharged waste resin is stored in the existing waste resin storage tank waste resin treatment system for reducing the generation of high-level radioactive waste resin of the heavy water reactor-type nuclear power plant. 제 1 항에 있어서, 상기 이온교환수지탑은, 양이온교환수지만 수용하는 양이온교환수지탑과, 음이온교환수지만 수용하는 음이온교환수지탑으로 분리구성하여 중수를 순차로 통과시킴으로써 상기 양이온교환수지탑에서는 중수에 포함된 양이온방사성 핵종만을 제거하고, 상기 음이온교환수지탑에서는 중수에 포함된 C-14 포함 음이온방사성 핵종만을 제거하며, 상기 양이온교환수지탑으로부터 배출되는 폐수지는 상기 기존의 폐수지 저장탱크에 저장하고 상기 음이온교환수지탑으로부터 배출되는 C-14 포집 폐수지는 상기 C-14 포집 폐수지 전용탱크에 저장하도록 됨을 특징으로 하는 중수로형 원자력발전소의 고준위 방사성 폐수지 발생 감소를 위한 폐수지 처리시스템.The cation exchange resin tower according to claim 1, wherein the ion exchange resin tower is divided into a cation exchange resin tower containing only a cation exchange resin and an anion exchange resin tower containing only an anion exchange resin, and sequentially passing heavy water. Removes only the cation radionuclides contained in the heavy water, and removes only the C-14 containing anion radionuclides contained in the heavy water in the anion exchange resin tower, the waste resin discharged from the cation exchange resin tower C-14 capture waste resin stored in a storage tank and discharged from the anion exchange resin tower is stored in the C-14 capture waste resin dedicated tank. Processing system.
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