JPH0358080B2 - - Google Patents
Info
- Publication number
- JPH0358080B2 JPH0358080B2 JP3759583A JP3759583A JPH0358080B2 JP H0358080 B2 JPH0358080 B2 JP H0358080B2 JP 3759583 A JP3759583 A JP 3759583A JP 3759583 A JP3759583 A JP 3759583A JP H0358080 B2 JPH0358080 B2 JP H0358080B2
- Authority
- JP
- Japan
- Prior art keywords
- shielding material
- storage container
- cast
- shielding
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 19
- 238000003860 storage Methods 0.000 claims description 14
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 239000000941 radioactive substance Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Description
【発明の詳細な説明】
この発明は、放射性物質の収納容器の製造方法
の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for manufacturing a storage container for radioactive substances.
従来、放射性物質の収納容器として、鍛鋼製の
容器本体の外面に、中性子の漏洩を防止するため
の樹脂の層を形成することが行なわれている。そ
して、この構造では内部の収納物の熱を放散する
ために、鍛鋼製本体の外周に樹脂層を貫通するフ
インを設けている。この構造ではフインの部分は
樹脂層がないために、この部分からある程度の中
性子が漏洩することは避けられなかつた。また、
鋳鋼、鍛鋼製の本体の内部に中空部を形成し、そ
こに樹脂を充填して中性子の遮蔽を行うようにし
た構造も提案されている。この場合には、中空部
の機械加工に非常に手間がかかるという欠点があ
る。 BACKGROUND ART Conventionally, as a storage container for radioactive substances, a resin layer is formed on the outer surface of a container body made of forged steel to prevent leakage of neutrons. In this structure, fins that penetrate the resin layer are provided on the outer periphery of the forged steel main body in order to dissipate the heat of the contents stored inside. In this structure, since there is no resin layer in the fin portion, it was inevitable that a certain amount of neutrons would leak from this portion. Also,
A structure has also been proposed in which a hollow part is formed inside the main body made of cast steel or forged steel, and the hollow part is filled with resin to shield neutrons. In this case, there is a drawback that machining of the hollow portion is extremely time consuming.
この発明は、このような従来の欠点を解消する
ためになされたものであり、γ線および中性子の
遮蔽効果は充分にあり、かつ容易に製作すること
ができる収納容器の製造方法を提供するものであ
る。 The present invention has been made in order to eliminate such conventional drawbacks, and provides a method for manufacturing a storage container that has sufficient gamma ray and neutron shielding effects and can be easily manufactured. It is.
すなわち、この発明は、焼結体製の放射能遮蔽
材を鋳型中に配置して鋳鉄または鋳鋼を鋳造する
ことにより、上記焼結体を鋳包んだ収納容器本体
を形成するようにしたものである。 That is, in this invention, a radiation shielding material made of a sintered body is placed in a mold and cast iron or cast steel is cast to form a storage container body in which the sintered body is cast. be.
以下、この発明の実施例を図面によつて説明す
る。第１図および第２図において、収納容器本体
１は鋳鉄または鋳鋼によつて、円筒部２の一方に
底壁２０が一体に形成されてなり、円筒部２の他
方の開口部には内蓋１０および外蓋１１がが順次
取付けられ、内蓋１０および外蓋１１の外周に
は、図示しないパツキンが配置されてシールされ
ている。収納容器本体１内には、放射性物質を収
納したバスケツトが収納されている。 Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, a storage container body 1 is made of cast iron or cast steel and has a bottom wall 20 integrally formed on one side of a cylindrical part 2, and an inner cover is provided at the other opening of the cylindrical part 2. 10 and an outer lid 11 are attached in sequence, and a seal (not shown) is placed on the outer periphery of the inner lid 10 and outer lid 11 for sealing. Inside the storage container body 1, a basket containing radioactive materials is stored.
円筒部２の内部には焼結体製の放射能遮蔽材７
が鋳包まれている。この遮蔽材７は棒状に形成さ
れて周方向に多数配置され、バスケツト４から円
筒部２中を放射方向に放散する中性子を漏れなく
遮蔽できるように密に配置されている。また、円
筒部２の外周には放熱用のフイン８が形成され、
外周両端部付近にはトラニオン９が形成されてい
る。このフインは収納容器本体１の周方向に配置
してもよい。また、底壁２０にも円筒部２と同様
に遮蔽材を配置させてもよい。 Inside the cylindrical part 2 is a radiation shielding material 7 made of a sintered body.
is encased. The shielding members 7 are formed in a rod shape and are arranged in large numbers in the circumferential direction, and are densely arranged so as to completely shield neutrons radiating from the basket 4 into the cylindrical portion 2. Furthermore, heat dissipation fins 8 are formed on the outer periphery of the cylindrical portion 2.
Trunnions 9 are formed near both ends of the outer periphery. These fins may be arranged in the circumferential direction of the storage container body 1. Furthermore, a shielding material may be placed on the bottom wall 20 as well as on the cylindrical portion 2.
遮蔽材としては、上記のように多数の棒状物を
用いる代りに、第３図に示すように環状の遮蔽材
７０を用いてもよい。この場合には、遮蔽材７０
が円周方向に連続するために遮蔽効果はより完全
であり、このため円周部２を薄くすることができ
る。 As the shielding material, instead of using a large number of rod-shaped objects as described above, an annular shielding material 70 as shown in FIG. 3 may be used. In this case, the shielding material 70
The shielding effect is more complete because the shielding effect is continuous in the circumferential direction, and therefore the circumferential portion 2 can be made thinner.
つぎに、このような構造の収納容器を製造する
方法を説明する。まず、遮蔽材とてはボロンナイ
トライド（BN）、ボロンカーバイト（B4C）、グ
ラフアイト、その他の含水素金属から選択された
一種または二種以上を用いる。これらの微粉末
（１〜5μ）を適当な圧力（約100Kg／cm2）で圧縮、
焼結により成形し、あるいはHIP法（2000℃、
200Kg／cm2）によつて固化させて所定形状の焼結
体とする。つぎにこの遮蔽材を図示しない鋳型内
に配置させて鋳鉄または鋳鋼を鋳込む。これによ
つて遮蔽材を鋳込んだ収納容器本体１が形成され
る。この鋳込みに際し、上記遮蔽材は熱伝導性が
良好なため、鋳物の冷却時の冷却効果を妨げず、
とくに球状黒鉛鋳鉄を用いた場合には冷却が理想
的になり、良好な金属組織が得られる。また、放
熱も妨げられないために、放熱用の熱の通路を特
別に考慮する必要もない。また、遮蔽材を本体に
鋳包むと、収納容器本体に対する遮蔽材の取付け
を簡単かつ強固に行うことができ、また全体の形
状も簡単にすることができる。また、上記方法で
は、遮蔽材の詰込みのための中空部を加工した
り、中空部に遮蔽材を詰込んだりする作業は必要
なく、所定形状の焼結体を金型内に配置するだけ
でよいために全体の製造工程も簡単になる。 Next, a method for manufacturing a storage container having such a structure will be explained. First, as the shielding material, one or more selected from boron nitride (BN), boron carbide (B 4 C), graphite, and other hydrogen-containing metals are used. These fine powders (1 to 5μ) are compressed under appropriate pressure (approximately 100Kg/cm 2 ),
Molded by sintering or HIP method (2000℃,
200Kg/cm 2 ) to form a sintered body of a predetermined shape. Next, this shielding material is placed in a mold (not shown), and cast iron or cast steel is poured into the mold. As a result, the container main body 1 in which the shielding material is cast is formed. During this casting, the above-mentioned shielding material has good thermal conductivity, so it does not interfere with the cooling effect when cooling the casting.
In particular, when spheroidal graphite cast iron is used, cooling becomes ideal and a good metal structure can be obtained. Further, since heat radiation is not hindered, there is no need to take special consideration of the heat path for heat radiation. Further, by casting the shielding material into the main body, the shielding material can be easily and firmly attached to the storage container main body, and the overall shape can be simplified. Furthermore, in the above method, there is no need to process the hollow part for filling the shielding material or to fill the hollow part with the shielding material, but only to place the sintered body of a predetermined shape in the mold. This simplifies the entire manufacturing process.
以上説明したように、この発明は放射性の物質
の収納容器を鋳鉄または鋳鋼製にして、これの鋳
造の際に放射能遮蔽材を一体に鋳込むようにした
ものであり、遮蔽材の取付けが簡単かつ確実で、
収納容器の製造を簡単に行うことができるもので
ある。 As explained above, in this invention, the storage container for radioactive substances is made of cast iron or cast steel, and the radioactive shielding material is integrally cast when the container is cast, and the installation of the shielding material is easy. Easy and reliable
The storage container can be manufactured easily.
第１図はこの発明の実施例を示す部分縦断面側
面部、第２図はその−線断面図、第３図は他
の実施例を示す横断面図である。
１…収納容器本体、２…円筒部、７，７０…遮
蔽材、８…フイン。
FIG. 1 is a partial vertical sectional side view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line 2, and FIG. 3 is a horizontal sectional view showing another embodiment. DESCRIPTION OF SYMBOLS 1... Storage container main body, 2... Cylindrical part, 7, 70... Shielding material, 8... Fin.
Claims (1)
鋳鉄または鋳鋼を鋳造することにより、上記放射
能遮蔽材を鋳包んだ収納容器を成形することを特
徴とする放射性物質の収納容器の製造方法。1. A storage container for radioactive substances, characterized in that a storage container in which the radiation shielding material is cast is formed by placing the radiation shielding material made of a sintered body in a mold and casting cast iron or cast steel. manufacturing method.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3759583A JPS59162488A (en) | 1983-03-07 | 1983-03-07 | Method of making cask for radioactive material |
| EP84300245A EP0116412A1 (en) | 1983-01-18 | 1984-01-16 | A casing for radioactive materials and a method of manufacture of the same |
| US06/805,252 US4752437A (en) | 1983-01-18 | 1985-12-04 | Packaging of radioactive materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3759583A JPS59162488A (en) | 1983-03-07 | 1983-03-07 | Method of making cask for radioactive material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59162488A JPS59162488A (en) | 1984-09-13 |
| JPH0358080B2 true JPH0358080B2 (en) | 1991-09-04 |
Family
ID=12501904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3759583A Granted JPS59162488A (en) | 1983-01-18 | 1983-03-07 | Method of making cask for radioactive material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59162488A (en) |
-
1983
- 1983-03-07 JP JP3759583A patent/JPS59162488A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59162488A (en) | 1984-09-13 |
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