JPS6318160B2 - - Google Patents
Info
- Publication number
- JPS6318160B2 JPS6318160B2 JP1811382A JP1811382A JPS6318160B2 JP S6318160 B2 JPS6318160 B2 JP S6318160B2 JP 1811382 A JP1811382 A JP 1811382A JP 1811382 A JP1811382 A JP 1811382A JP S6318160 B2 JPS6318160 B2 JP S6318160B2
- Authority
- JP
- Japan
- Prior art keywords
- radiation
- transparent material
- shielding transparent
- zinc iodide
- aqueous solution
- 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
- UAYWVJHJZHQCIE-UHFFFAOYSA-L zinc iodide Chemical compound I[Zn]I UAYWVJHJZHQCIE-UHFFFAOYSA-L 0.000 claims description 29
- 239000012780 transparent material Substances 0.000 claims description 23
- 230000005855 radiation Effects 0.000 claims description 22
- 239000007864 aqueous solution Substances 0.000 claims description 15
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical group O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 239000005355 lead glass Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 8
- 238000002834 transmittance Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 6
- VNDYJBBGRKZCSX-UHFFFAOYSA-L zinc bromide Chemical compound Br[Zn]Br VNDYJBBGRKZCSX-UHFFFAOYSA-L 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229940102001 zinc bromide Drugs 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 2
- UESISTHQAYQMRA-UHFFFAOYSA-M formyloxythallium Chemical compound [Tl+].[O-]C=O UESISTHQAYQMRA-UHFFFAOYSA-M 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Glass Compositions (AREA)
- Laminated Bodies (AREA)
- Materials For Medical Uses (AREA)
Description
【発明の詳細な説明】
本発明は放射線遮蔽物質、特に放射線遮蔽透明
物質に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to radiation shielding materials, particularly radiation shielding transparent materials.
近年原子力産業の発展に伴ない、放射線遮蔽透
明物質の需要は特に高まつてきている。この目的
の為には多くの場合、鉛ガラスが使用されてい
る。然し、鉛ガラスは固体のブロツクであり、製
造工程上の理由から形状、寸法に制限があり、機
械的に脆弱であり多数積み重ねることは技術的に
困難である上、放射線損傷により着色し易くC0 60
のγ線の105ラド程度の照射で黄褐色になる欠点
がある。プラスチツクス中に鉛を含ませた鉛ガラ
ス入りプラスチツクスも発表されているが、鉛の
含有量が20〜30重量％と低く遮蔽能力が鉛ガラス
より格段に劣るにも拘らず、光透過率が鉛ガラス
より格段に低く、さらに放射線損傷により黄色に
着色する欠点がある。過去にZnBr2溶液が使用さ
れたことがあつたが、光透過率が低く、化学的に
活性で多くの金属を腐蝕する上、光及び放射線損
傷に対する耐性が低い欠点がある為、現在では殆
んど使用されていない。従つて、これ等の欠点を
有しない放射線遮蔽透明物質が要望されていた。 In recent years, with the development of the nuclear power industry, the demand for radiation-shielding transparent materials has particularly increased. Lead glass is often used for this purpose. However, lead glass is a solid block, and its shape and dimensions are limited due to the manufacturing process. It is mechanically fragile and it is technically difficult to stack large numbers of them. Moreover, it is easily discolored due to radiation damage. 0 60
It has the disadvantage that it turns yellowish brown when exposed to gamma rays of about 105 rad. Plastics with lead glass containing lead in the plastic have been announced, but although the lead content is low at 20 to 30% by weight and the shielding ability is significantly inferior to lead glass, the light transmittance is low. It is much lower than lead glass, and it also has the disadvantage of becoming yellow due to radiation damage. Although ZnBr 2 solutions have been used in the past, they are now rarely used because they have low light transmittance, are chemically active and corrode many metals, and have low resistance to light and radiation damage. Mostly unused. Therefore, there is a need for a radiation-shielding transparent material that does not have these drawbacks.
本発明はこれらの欠点を解消する放射線遮蔽透
明物質を提供する。 The present invention provides a radiation-shielding transparent material that overcomes these drawbacks.
本発明は放射線、光の照射に対して耐性が高
く、鉛ガラスに比べて少くとも２桁高い耐性を有
する放射線遮蔽透明物質を提供することを目的と
する。 An object of the present invention is to provide a radiation-shielding transparent material that has high resistance to radiation and light irradiation, and has a resistance that is at least two orders of magnitude higher than that of lead glass.
本発明は形状及び寸法に制約のない放射線遮蔽
透明物質を提供することを目的とする。 The object of the present invention is to provide a radiation-shielding transparent material that is free from restrictions in shape and size.
本発明はまた、化学的安定性が高く、長年月の
使用で変化を生じない放射線遮蔽透明物質を提供
することを目的とする。 Another object of the present invention is to provide a radiation-shielding transparent material that has high chemical stability and does not change over many years of use.
本発明はまた、周辺の物質に対して化学的損傷
を与えることの殆んど又は全くない放射線遮蔽透
明物質を提供することを目的とする。 It is also an object of the present invention to provide a radiation-shielding transparent material that causes little or no chemical damage to surrounding materials.
本発明はさらに、重い化合物液体（重液）を放
射線遮蔽透明物質として提供することを目的とす
る。 The invention further aims to provide heavy compound liquids (heavy liquids) as radiation-shielding transparent materials.
本出願人は先に前述の目的の為に蟻酸タリウム
水溶液又は蟻酸タリウム水溶液とマロン酸タリウ
ム水溶液との混合液が好適であることを見出し、
特許出願した（特願昭55−158800号）。同出願の
重液は両者共光透過率、輻射長（これが放射線遮
蔽に大きな役割を果す）、対光耐性、対放射線耐
性の何れも鉛ガラス（SF−５）と同程度又はそ
れ以上の優れた特性を有するが、タリウムがカド
ミウムと同程度に強い毒性を有する為、取扱い及
び管理が困難な欠点があつた。従つてまた、本発
明は取扱い及び管理上危険の殆んどない重液を放
射線遮蔽透明物質として提供することを目的とす
る。 The present applicant has previously discovered that a thallium formate aqueous solution or a mixed solution of a thallium formate aqueous solution and a thallium malonate aqueous solution is suitable for the above-mentioned purpose,
A patent application was filed (Japanese Patent Application No. 158800-1983). Both of the heavy liquids in the same application have light transmittance, radiation length (which plays a major role in radiation shielding), light resistance, and radiation resistance, which are comparable to or better than lead glass (SF-5). However, thallium has the same strong toxicity as cadmium, making it difficult to handle and manage. Therefore, it is also an object of the present invention to provide a heavy liquid as a radiation-shielding transparent material that poses little danger in terms of handling and management.
本発明はさらに、長年月の放射線、光の照射に
対して変色しない放射線遮蔽透明物質を提供する
ことを目的とする。 A further object of the present invention is to provide a radiation-shielding transparent material that does not discolor due to long-term irradiation with radiation and light.
これ等の目的は本発明により達成される。 These objectives are achieved by the present invention.
本発明は沃化亜鉛水溶液よりなることを特徴と
する放射線遮蔽透明物質である。 The present invention is a radiation-shielding transparent material comprising an aqueous zinc iodide solution.
沃化亜鉛ZnI2（比重4.2）は20℃の室温において
430ｇが100c.c.の水に溶解し、比重2.80の重液とな
る。重液の輻射長は3.8cmであり、鉛ガラスの1.5
倍である。光透過率は平均95％以上である。 Zinc iodide ZnI 2 (specific gravity 4.2) at room temperature of 20℃
430g is dissolved in 100c.c. of water to form a heavy liquid with a specific gravity of 2.80. The radiation length of heavy liquid is 3.8 cm and that of lead glass is 1.5 cm.
It's double. The average light transmittance is over 95%.
放射線遮蔽透明物質は可視光領域（λ＝350〜
600nｍ）の光の透過率が少くとも90％以上であ
り、輻射長が充分に短いことが必要である。その
他、原子番号Ｚができるだけ高く、比重ができる
だけ大きく、長年月に亘り放射線損傷に対し物理
的、化学的に安定なことが好ましい。 Radiation-shielding transparent materials are used in the visible light region (λ = 350 ~
The transmittance of light (600 nm) must be at least 90% or more, and the radiation length must be sufficiently short. In addition, it is preferable that the atomic number Z is as high as possible, the specific gravity is as large as possible, and that it is physically and chemically stable against radiation damage for many years.
沃化亜鉛の水溶液は前述した値で示されるよう
に、放射線遮蔽透明物質として必要な性質を充分
に有し、輻射長は鉛ガラスの1.5倍以上であり、
光透過率は鉛ガラスと同等以上であり、過去に使
用された臭化亜鉛水溶液に比べ、遮蔽能力、光透
過率、対光耐性、対放射線耐性の何れも優れてい
る。使用方法は臭化亜鉛水溶液と同様である。 As shown by the above values, the aqueous solution of zinc iodide has sufficient properties necessary as a radiation shielding transparent material, and the radiation length is more than 1.5 times that of lead glass.
The light transmittance is equal to or higher than that of lead glass, and the shielding ability, light transmittance, resistance to light, and resistance to radiation are all superior to the aqueous zinc bromide solutions used in the past. The method of use is the same as for zinc bromide aqueous solution.
然し、沃化亜鉛の水溶液は、鉛ガラスと同様
に、長年月の光、輻射線の照射に対しては変色
し、黄褐色となることを見出した。この変色は酸
化によりZnI2→Zn++＋I2 --と分離する結果、発生
することを見出した。 However, it was discovered that, like lead glass, an aqueous solution of zinc iodide changes color and becomes yellowish brown when exposed to moonlight or radiation for many years. It has been found that this discoloration occurs as a result of separation into ZnI 2 →Zn ++ +I 2 -- due to oxidation.
従つて、本発明の一実施例においては、沃化亜
鉛の水溶液に対して還元剤として次亜燐酸
H3PO2を加えると、長年月の光、放射線の照射
に対して極めて安定であり、変色を生じないこと
を見出した。本発明者は還元剤は極めて多数存在
するが、次亜燐酸以外の還元剤はこの目的に適さ
ないことを見出した。例えば、多くの還元剤は沃
化亜鉛と化学変化を起し、着色する。 Therefore, in one embodiment of the present invention, hypophosphorous acid is added as a reducing agent to an aqueous solution of zinc iodide.
It was discovered that when H 3 PO 2 is added, it is extremely stable against irradiation with moonlight and radiation for many years and does not cause discoloration. The inventor has discovered that although there are a large number of reducing agents, none other than hypophosphorous acid is suitable for this purpose. For example, many reducing agents chemically change with zinc iodide, resulting in color.
本発明の好適な一実施例においては、沃化亜鉛
の飽和水溶液に対し次亜燐酸の50％水溶液を12.5
重量％加える。このようにすると、重液の酸化は
完全に阻止され、強度の光、106ラド以上の放射
線に対しても長年月に亘り、酸化を防止すること
ができる。50％次亜燐酸水溶液の混入により比重
は2.40に低下するが、さらに沃化亜鉛を添加含有
させることにより比重を2.70まで上昇させること
ができる。この重液は放射線遮蔽透明物質とし
て、従来の臭化亜鉛水溶液よりも遥かに優れた特
性を有する。輻射長は4.0cm、比重2.70であり、
鉛ガラスSF−５に比べて、光、放射線に対して
少くとも100倍以上の耐性を有する。沃化亜鉛に
は記録された毒性はない。 In one preferred embodiment of the invention, a 50% aqueous solution of hypophosphorous acid is added at 12.5% to a saturated aqueous solution of zinc iodide.
Add % by weight. In this way, oxidation of the heavy liquid is completely prevented, and oxidation can be prevented for many years even against intense light and radiation of 10 6 rad or more. Although the specific gravity decreases to 2.40 by mixing with a 50% hypophosphorous acid aqueous solution, the specific gravity can be increased to 2.70 by further incorporating zinc iodide. This heavy liquid has far superior properties as a radiation-shielding transparent material than conventional zinc bromide aqueous solutions. The radiation length is 4.0cm and the specific gravity is 2.70.
It has at least 100 times more resistance to light and radiation than lead glass SF-5. Zinc iodide has no documented toxicity.
沃化亜鉛水溶液は、強化ガラス窓を有し、内面
にレジンライニングを施したステンレススチール
製容器に貯蔵することができ、腐蝕を完全に防止
することができる。 Zinc iodide aqueous solutions can be stored in stainless steel containers with tempered glass windows and resin lining on the inside to completely prevent corrosion.
かくて本発明の放射線遮蔽透明物質は、従来の
放射線遮蔽透明物質に比べて極めて優れている。 Thus, the radiation-shielding transparent material of the present invention is extremely superior to conventional radiation-shielding transparent materials.
本発明の広汎な精神と視野を逸脱することなく
本発明の種々な変更と修整が可能なこと勿論であ
る。 It will be understood that various changes and modifications may be made to the invention without departing from its broader spirit and scope.
Claims (1)
射線遮蔽透明物質。 ２ 特許請求の範囲１記載の放射線遮蔽透明物質
において、沃化亜鉛の飽和水溶液より成る放射線
遮蔽透明物質。 ３ 特許請求の範囲１記載の放射線遮蔽透明物質
において、沃化亜鉛水溶液に還元剤をを添加して
成る放射線遮蔽透明物質。 ４ 特許請求の範囲３記載の放射線遮蔽透明物質
において、還元剤が次亜燐酸である放射線遮蔽透
明物質。 ５ 特許請求の範囲４記載の放射線遮蔽透明物質
において、沃化亜鉛飽和水溶液に対して12.5重量
％の次亜燐酸50％水溶液を添加して成る放射線遮
蔽透明物質。 ６ 特許請求の範囲５記載の放射線遮蔽透明物質
において、沃化亜鉛をさらに添加して成る放射線
遮蔽透明物質。[Claims] 1. A radiation-shielding transparent material comprising an aqueous zinc iodide solution. 2. The radiation-shielding transparent material according to claim 1, which comprises a saturated aqueous solution of zinc iodide. 3. The radiation-shielding transparent material according to claim 1, which is obtained by adding a reducing agent to an aqueous zinc iodide solution. 4. The radiation-shielding transparent material according to claim 3, wherein the reducing agent is hypophosphorous acid. 5. The radiation shielding transparent material according to claim 4, which is obtained by adding 12.5% by weight of a 50% hypophosphorous acid aqueous solution to a saturated zinc iodide aqueous solution. 6. A radiation-shielding transparent material according to claim 5, further comprising zinc iodide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1811382A JPS58135995A (en) | 1982-02-09 | 1982-02-09 | Radiation shielding transparent material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1811382A JPS58135995A (en) | 1982-02-09 | 1982-02-09 | Radiation shielding transparent material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58135995A JPS58135995A (en) | 1983-08-12 |
| JPS6318160B2 true JPS6318160B2 (en) | 1988-04-16 |
Family
ID=11962554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1811382A Granted JPS58135995A (en) | 1982-02-09 | 1982-02-09 | Radiation shielding transparent material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58135995A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0559396U (en) * | 1992-12-17 | 1993-08-06 | 日本原子力研究所 | Nuclear fuel material and special fissile material monitoring device |
| FR2866646B1 (en) * | 2004-02-24 | 2007-09-21 | Snecma Moteurs | USE OF AN ORGANIC COMPOUND FOR THE ABSORPTION OF IONIZING RADIATION. |
-
1982
- 1982-02-09 JP JP1811382A patent/JPS58135995A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58135995A (en) | 1983-08-12 |
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