JP2013036968A - Method of removing, shielding (suppressing divergence of) and collecting radioactive substance using foamed ore - Google Patents
Method of removing, shielding (suppressing divergence of) and collecting radioactive substance using foamed ore Download PDFInfo
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- 239000000941 radioactive substance Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title description 14
- 239000002689 soil Substances 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 23
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 18
- 239000011707 mineral Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 13
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000005484 gravity Effects 0.000 claims abstract description 13
- 239000010457 zeolite Substances 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000012857 radioactive material Substances 0.000 claims description 48
- 239000005332 obsidian Substances 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 9
- 238000005202 decontamination Methods 0.000 claims description 8
- 230000003588 decontaminative effect Effects 0.000 claims description 8
- 230000001629 suppression Effects 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 2
- 238000004043 dyeing Methods 0.000 claims 1
- 238000005187 foaming Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000003643 water by type Substances 0.000 abstract 1
- 239000006260 foam Substances 0.000 description 14
- 239000008187 granular material Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000007667 floating Methods 0.000 description 6
- 239000000440 bentonite Substances 0.000 description 5
- 229910000278 bentonite Inorganic materials 0.000 description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052792 caesium Inorganic materials 0.000 description 4
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 238000010828 elution Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
Description
本発明は、黒曜石などの鉱石を焼成加工して発泡させた粒体又は粉体（以下、発泡鉱石の粒・粉体）を用いて空気中や液体中に存在する放射性物質、或いは土壌や植物など固体に付着する放射性物質を除染、遮蔽（発散抑制）、及び回収する技術に関する。 The present invention relates to a radioactive substance present in the air or liquid using a granule or powder obtained by firing ores such as obsidian and foamed (hereinafter referred to as foam ore granule / powder), or soil or plant. The present invention relates to a technique for decontaminating, shielding (suppressing divergence), and collecting radioactive substances adhering to a solid.
公園や校庭などの地表面の土壌に存在する放射性物質を除染すると共に大気への発散を抑制（遮蔽）するため、従来の技術で使われているゼオライトやベントナイトなどの鉱物を用いて散布などを行った場合、これらの鉱物は水分を吸収して重力沈降しやすく、汚染土壌と混ざり合ってしまい、被覆礫層を形成し難く、放射性物質の地表面からの大気への発散を抑制（遮蔽）することができない。また、これらの鉱物が放射性物質を吸着したとしても雨水による放射性物質の再溶出や地下浸透（地下水汚染）が懸念される。更に、従来の技術で使われているゼオライトやベントナイトなどの鉱物に放射性物質を吸着させ、これを回収する場合、これらの鉱物は汚染されていない土壌成分と混ざり合っていて、分離回収が困難である。従来の技術にはこのような問題点があり、土壌や植物など固体に付着する放射性物質、或いは空気中や液体中に存在する放射性物質の効果的な除染、遮蔽（発散抑制）、及び回収ができない。 In order to decontaminate radioactive substances present in the soil on the surface of the ground such as parks and schoolyards, and to suppress (shield) the release to the atmosphere, spraying using minerals such as zeolite and bentonite used in conventional technology When these materials are used, these minerals absorb water and easily settle by gravity, mix with contaminated soil, make it difficult to form a gravel layer, and suppress the release of radioactive materials from the ground surface to the atmosphere (shielding). )Can not do it. Moreover, even if these minerals adsorb radioactive materials, there are concerns about the re-elution of radioactive materials and underground infiltration (groundwater contamination) due to rainwater. Furthermore, when minerals such as zeolite and bentonite used in the prior art are adsorbed with radioactive materials and recovered, these minerals are mixed with uncontaminated soil components and are difficult to separate and recover. is there. The conventional technology has such problems, and effective decontamination, shielding (suppressing divergence) and recovery of radioactive substances adhering to solids such as soil and plants, or radioactive substances present in the air or liquid. I can't.
本発明は、上述の問題点に鑑みてなされたものであり、本発明の目的は、発泡鉱石の粒・粉体を用いて空気中や液体中に存在する放射性物質、或いは土壌や植物など固体に付着する放射性物質を効果的に除染し、又は遮蔽（発散抑制）すると共に、その後の放射性物質が吸着された発泡鉱石の粒体は水中などで浮上分離して効果的に回収する方法を提供し、上述の問題点を解決することにある。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to use radioactive substances present in the air or liquid using foam ore grains or powder, or solids such as soil and plants. A method for effectively decontaminating or shielding (suppressing divergence) the radioactive material adhering to the surface, and then recovering the foamed ore particles adsorbed with the radioactive material by floating and separating in water, etc. It is to provide and solve the above problems.
上述の目的を達成するための手段として、請求項１、２に記載の放射性物質の除染、遮蔽（発散抑制）、及び回収する方法を用いる。請求項１、２に記載の発泡鉱石の粒・粉体は、ゼオライトに類似した成分構成（二酸化ケイ素、酸化アルミニウム、酸化ナトリウム、酸化カルシウム、酸化カリウムなど）で多孔質構造の鉱物であると共に、ゼオライトなどの鉱物の粒・粉体に比べてきわめて軽量であること、又は粒径が約１〜５０ｍｍ、比重が約０．１〜１と広範囲であること、又は透水と非透水の効果を併せ持つことなどの特質を有する。この特質を活用して空気中や液体中に存在する放射性物質、或いは土壌や植物など固体に付着する放射性物質を除染、遮蔽（発散抑制）、及び回収することを特徴とする方法である。具体的な方法を３例挙げ、以下に記述する。 As a means for achieving the above-mentioned object, the decontamination, shielding (divergence suppression) and recovery method of the radioactive substance according to
１例目として、公園や校庭などの地表面の土壌に存在する放射性物質に対しては、地面土壌の表面に発泡鉱石の粒体を散布して礫層を形成して被覆し、発泡鉱石の粒体の雨風による流出を防ぐため前記礫層の上に放射性物質に汚染されていない客土を載せ覆い、地表面の土壌中に存在する放射性物質を発泡鉱石の粒体に吸着させ、除染すると共に大気への発散を抑制（遮蔽）する方法。 As a first example, for radioactive materials present in the soil on the ground such as parks and schoolyards, foam ore granules are sprayed on the surface of the ground soil to form a gravel layer, which is covered with foam ore. To prevent runoff due to rain and wind, granite layer is covered with the soil that is not contaminated with radioactive material, and the radioactive material present in the soil on the ground surface is adsorbed to the foamed ore granule for decontamination. To suppress (shield) the divergence to the atmosphere.
２例目として、核燃料のプール水など、高濃度の放射性物質に汚染され、高温の状況下で水などの液面から大気に発散する放射性物質に対しては、液面に発泡鉱石の粒体を散布して浮上の礫層を形成して覆い、放射性物質の液面からの大気への発散を抑制（遮蔽）する方法。 As a second example, for radioactive materials that are contaminated with high-concentration radioactive materials, such as nuclear fuel pool water, and radiate from the surface of water, etc. to the atmosphere under high temperature conditions, foam ore particles on the liquid surface A method to suppress (shield) the emission of radioactive material from the liquid surface to the atmosphere by covering the surface by forming a gravel layer.
３例目として、大気中に浮遊する放射性物質、及び建物、植物、道路、側溝など固体に付着する放射性物質に対しては、発泡鉱石の粒・粉体を混ぜた水を放水し散布して、放射性物質を洗い落とし、発泡鉱石の粒・粉体に吸着させ除染し、その後の水と発泡鉱石の粒体は側溝など排水溝を経て貯留槽に貯留する。貯留槽では土砂などは重力沈降し、放射性物質を吸着した発泡鉱石の粒子は浮上分離するので、これを回収する。ここで使用する発泡鉱石の粒・粉体の粒径及び比重は、放射性物質の吸着効率や回収効率を考慮して選択する。粒径は小さいほど放射生物質と接触し吸着効率は高い。また、比重は小さいほど浮上分離しやすく回収効率は高い。 As a third example, for radioactive materials floating in the atmosphere, and radioactive materials attached to solids such as buildings, plants, roads, gutters, etc., spray and spray water mixed with foam ore grains and powder. The radioactive material is washed away and adsorbed on the foam ore grains and powder for decontamination, and the subsequent water and foam ore granules are stored in a storage tank through drainage grooves such as side grooves. In the storage tank, earth and sand etc. are gravity settled, and the foamed ore particles adsorbed with the radioactive material float and are separated. The particle diameter and specific gravity of the foamed ore particles and powder used here are selected in consideration of the adsorption efficiency and recovery efficiency of the radioactive substance. The smaller the particle size, the higher the adsorption efficiency due to contact with the radioactive material. In addition, the smaller the specific gravity, the easier the floating separation and the higher the recovery efficiency.
本発明により、従来の技術に比べてより効果的に放射性物質の除染、遮蔽（発散抑制）、及び回収することが可能となり、次のような顕著な効果を奏する。 According to the present invention, it becomes possible to decontaminate, shield (suppress divergence), and recover a radioactive substance more effectively than conventional techniques, and the following remarkable effects can be obtained.
すなわち、前述の１例目の方法に従来の技術で使われているゼオライトやベントナイトなどの鉱物を用いた場合、これらの鉱物は水分を吸収して重力沈降しやすく、汚染土壌と混ざり合ってしまい、被覆礫層を形成し難く、放射性物質の地表面からの発散を抑制することができないが、請求項１、２に記載の方法を用いることにより、放射性物質の地表面からの発散を効果的に抑制（遮蔽）することが可能である。又、請求項１、２に記載の発泡鉱石の被覆礫層は、地表面から雨水が浸透した場合排水層として働き、汚染土壌層への雨水の浸透を防ぎ、汚染土壌層中の放射性物質の雨水による再溶出や地下浸透（地下水汚染）を抑制する等の効果を奏する。 That is, when minerals such as zeolite and bentonite used in the prior art are used in the above-described first example method, these minerals absorb water and easily settle by gravity and mix with contaminated soil. However, it is difficult to form a covered gravel layer, and it is not possible to suppress the divergence of radioactive material from the ground surface, but by using the method according to
また、前述の２例目の方法に従来の技術で使われているゼオライトやベントナイトなどの鉱物を用いた場合、これらの鉱物は水分などを吸収して重力沈降し、液面に浮上の被覆礫層を形成し難く、放射性物質の液面からの大気への発散を抑制することができないが、請求項１、２に記載の方法を用いることにより、放射性物質の液面からの発散を効果的に抑制（遮蔽）することが可能である。 In addition, when minerals such as zeolite and bentonite used in the prior art are used in the above-mentioned second example method, these minerals absorb moisture and gravity settle, and the coated gravel floats on the liquid surface. It is difficult to form a layer, and the emission of radioactive material from the liquid surface to the atmosphere cannot be suppressed. However, by using the method according to
更に、前述の３例目の方法に従来の技術で使われているゼオライトやベントナイトなどの鉱物を用いた場合、これらの鉱物は水分を吸収して重力沈降しやすく、放射性物質に汚染された土壌や瓦礫などが混ざってしまい、放射性物質を吸着しても分離回収することが難しいが、請求項１、２に記載の放射性物質の除染及び回収する方法を用いることにより、大気中に浮遊する放射性物質、及び建物、植物、道路、側溝など固体に付着する放射性物質を除染すると共に放射性物質が吸着された発泡鉱石を効果的に分離回収することができる。 Furthermore, when minerals such as zeolite and bentonite used in the prior art are used in the above-mentioned third example method, these minerals absorb water and easily settle by gravity, and soil contaminated with radioactive materials. It is difficult to separate and recover even if it adsorbs radioactive materials, but it floats in the atmosphere by using the method for decontamination and recovery of radioactive materials according to
次に、本発明を実施するための形態について好適な実施の形態を３例挙げ、以下に説明する。 Next, three preferred embodiments of the embodiment for carrying out the present invention will be described below.
１例目として、公園や校庭などの地表面の土壌に存在する放射性物質に対しては、地面土壌の表面に発泡鉱石の粒体を散布して礫層を形成して被覆し、発泡鉱石の粒体の雨風による流出を防ぐため前記礫層の上に放射性物質に汚染されていない客土を載せ覆い、地表面の土壌中に存在する放射性物質を発泡鉱石の粒体に吸着させ、除染すると共に大気への発散を抑制（遮蔽）する。 As a first example, for radioactive materials present in the soil on the ground such as parks and schoolyards, foam ore granules are sprayed on the surface of the ground soil to form a gravel layer, which is covered with foam ore. To prevent runoff due to rain and wind, granite layer is covered with the soil that is not contaminated with radioactive material, and the radioactive material present in the soil on the ground surface is adsorbed to the foamed ore granule for decontamination. And suppress (shield) divergence to the atmosphere.
２例目として、核燃料のプール水など、高濃度の放射性物質に汚染され、高温の状況下で水などの液面から大気に発散する放射性物質に対しては、液面に発泡鉱石の粒体を散布して浮上の礫層を形成して覆い、放射性物質の液面からの大気への発散を抑制（遮蔽）する。 As a second example, for radioactive materials that are contaminated with high-concentration radioactive materials, such as nuclear fuel pool water, and radiate from the surface of water, etc. to the atmosphere under high temperature conditions, foam ore particles on the liquid surface Is sprayed to form a floating gravel layer and cover it to suppress (shield) the release of radioactive material from the liquid surface to the atmosphere.
３例目として、大気中に浮遊する放射性物質、及び建物、植物、道路、側溝など固体に付着する放射性物質に対しては、発泡鉱石の粒・粉体を混ぜた水を放水し散布して、放射性物質を洗い落とし、発泡鉱石の粒体に吸着させ除染し、その後の水と発泡鉱石の粒体は側溝など排水溝を経て貯留槽に貯留する。貯留槽では土砂などは重力沈降し、放射性物質を吸着した発泡鉱石の粒子は浮上分離するので、これを回収する。ここで使用する発泡鉱石の粒・粉体の粒径及び比重は、放射性物質の吸着効率や回収効率を考慮して選択する。粒径は小さいほど放射生物質と接触し吸着効率は高い。また、比重は小さいほど浮上分離しやすく回収効率は高い。 As a third example, for radioactive materials floating in the atmosphere, and radioactive materials attached to solids such as buildings, plants, roads, gutters, etc., spray and spray water mixed with foam ore grains and powder. The radioactive material is washed off, adsorbed on the foamed ore granules and decontaminated, and the subsequent water and foamed ore granules are stored in a storage tank through drainage grooves such as side grooves. In the storage tank, earth and sand etc. are gravity settled, and the foamed ore particles adsorbed with the radioactive material float and are separated. The particle diameter and specific gravity of the foamed ore particles and powder used here are selected in consideration of the adsorption efficiency and recovery efficiency of the radioactive substance. The smaller the particle size, the higher the adsorption efficiency due to contact with the radioactive material. In addition, the smaller the specific gravity, the easier the floating separation and the higher the recovery efficiency.
以上、本発明について好適的な実施例の形態を挙げたが、本発明はこの実施形態に限定されるものではない。例えば、従来のゼオライトを用いた放射性物質の除染、遮蔽（発散抑制）、及び回収の同様の方法に発泡鉱石をゼオライトの代替物質として用いて、そこで発泡鉱石の特質を活用する方法等の改変を施し得る。 As mentioned above, although the form of the suitable Example was mentioned about this invention, this invention is not limited to this embodiment. For example, modification of the method of using foam ore as a substitute for zeolite in the same method of decontamination, shielding (divergence suppression) and recovery of radioactive material using conventional zeolite, and utilizing the characteristics of foam ore there Can be applied.
次に、本発明の代表的な実施例を図１に基づいて説明する。図１は、代表的な実施例を示す概略縦断面図である。地表面（実施前）７の深さ約１００ｍｍが放射性物質（放射性セシウム）４に汚染された土壌層１である。前記地表面（実施前）７の上に黒曜石を焼成加工して発泡した粒体５（粒径約５ｍｍ）を散布して礫層２（深さ約１５０ｍｍ）を形成し被覆し、前記発泡黒曜石の粒体５の雨風による流出防止と前記発泡黒曜石の礫層２の強度確保のため、前記発泡黒曜石の礫層２の上に放射性物質に汚染されていない客土６を載せ、客土層３（深さ約１５０ｍｍ以上）を形成し覆い、前記放射性物質に汚染されていない客土層３に植栽９をして、前記発泡黒曜石の礫層２と前記放射性物質に汚染されていない客土層３をあわせた全体の土壌構造を改良し安定、強度化を図る。この実施例によって、汚染土壌層１中の放射性物質（放射性セシウム）４は発泡黒曜石の礫層２と汚染されていない客土層３の２重の被覆によって大気への発散を抑制され、また、地表面（実施前）７付近の土壌中に存在する放射性物質（放射性セシウム）４は発泡黒曜石の粒体５と接触し、発泡黒曜石のイオン交換性能によって粒体５に吸着され除染され、更に、地表面（実施後）８から雨水が浸透した場合、発泡黒曜石の礫層２は排水層として働き、汚染土壌層１への雨水の浸透を防ぎ、汚染土壌層１中の放射性物質（放射性セシウム）４の雨水による再溶出や地下浸透（地下水汚染）が抑制される等の効果を奏する。 Next, a typical embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic longitudinal sectional view showing a typical embodiment. The depth of about 100 mm of the ground surface (before implementation) 7 is the soil layer 1 contaminated with the radioactive substance (radiocesium) 4. On the ground surface (before implementation) 7, obsidian is burned and sprinkled with foamed granules 5 (particle diameter of about 5 mm) to form a gravel layer 2 (depth of about 150 mm) and cover the foamed obsidian. In order to prevent the outflow of the
１ 放射性物質（放射性セシウム）に汚染された土壌層
２ 発泡黒曜石の礫層
３ 放射性物質に汚染されていない客土層
４ 放射性物質（放射性セシウムなど）
５ 発泡黒曜石の粒体（粒径約５ｍｍ）
６ 放射性物質に汚染されていない客土
７ 地表面（実施前）
８ 地表面（実施後）
９ 植栽
１０ 大気1 Soil layer contaminated with radioactive material (radioactive cesium) 2 Gravel layer of foamed obsidian 3 Guest soil layer not contaminated with radioactive material 4 Radioactive material (radioactive cesium, etc.)
5 Foamed obsidian granules (particle size approximately 5mm)
6 Guest soil not contaminated with
8 Ground surface (after implementation)
9 Planting 10 Atmosphere
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| JP2014173847A (en) * | 2013-03-05 | 2014-09-22 | Toyokazutada Kk | Radioactive element adsorbent and radioactive element removal method, and processing method for adsorbent on which radioactive element is adsorbed |
| CN109087722A (en) * | 2018-08-17 | 2018-12-25 | 西南科技大学 | A kind of uranium-bearing low level waste water ecology cleaning treatment system and processing method |
| CN114400105A (en) * | 2021-12-10 | 2022-04-26 | 核工业北京地质研究院 | A method for reducing the radioactive intensity of field work sites |
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| JPN6012066380; Ｊ．-Ｌ．Ｒｅｈｓｐｒｉｎｇｅｒ: '"Ｃｏｎｆｉｎｉｎｇ ｃａｅｓｉｕｍ ｉｎ ｅｘｐａｎｄｅｄ ｎａｔｕｒａｌ Ｐｅｒｌｉｔｅ"' Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｅｕｒｏｐｅａｎ Ｃｅｒａｎｕｃ Ｓｏｃｉｅｔｙ Ｖｏｌ．２７, 2007, ｐｐ．６１９-６２２, ＥＬＳＥＶＩＥＲ * |
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| JP2014173847A (en) * | 2013-03-05 | 2014-09-22 | Toyokazutada Kk | Radioactive element adsorbent and radioactive element removal method, and processing method for adsorbent on which radioactive element is adsorbed |
| CN109087722A (en) * | 2018-08-17 | 2018-12-25 | 西南科技大学 | A kind of uranium-bearing low level waste water ecology cleaning treatment system and processing method |
| CN114400105A (en) * | 2021-12-10 | 2022-04-26 | 核工业北京地质研究院 | A method for reducing the radioactive intensity of field work sites |
| CN114400105B (en) * | 2021-12-10 | 2025-08-12 | 核工业北京地质研究院 | Method for reducing radioactivity intensity of field work site |
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