公开(公告)号：US4628837A

公开(公告)日：1986-12-16

申请号：US677992

申请日：1984-12-04

申请人： Kazuhide Mori ,  Shin Tamata ,  Makoto Kikuchi ,  Masami Matsuda ,  Yoshiyuki Aoyama

发明人： Kazuhide Mori ,  Shin Tamata ,  Makoto Kikuchi ,  Masami Matsuda ,  Yoshiyuki Aoyama

IPC分类号： G21F9/30 ,  G21F9/32 ,  F23G7/00

CPC分类号： G21F9/32

摘要： In a method of processing radioactive spent ion exchange resin, the spent ion exchange resin is pyrolyzed in an inert atmosphere and harmful decomposition gas such as sulfur and nitrogen compounds generated during pyrolysis is separated. Next, the spent ion exchange resin is pyrolyzed in oxidizing atmosphere and harmless gases such as carbon dioxide and water vapor gases are separated. It is preferred that a transition metal as a catalyst be adsorbed through ion exchange into spent cation exchange resin, and an anionic atom group containing a transition metal as a catalyst be adsorbed through ion exchange into spent anion exchange, before both of the pyrolysis steps. The pyrolysis is carried out at two atmosphere stages, and the harmful and harmless gases are decomposed separately. The pyrolysis in both of pyrolysis steps is effected at a temperature in the range of from 240.degree. to 420.degree. C. The proportions of the sulfur and nitrogen compounds in spent ion exchange resin after pyrolysis, and also the processing volume of the spent ion exchange resin can be reduced. And scattering of radioactive substances can be prevented. By adding a catalyst to the spent ion exchange resin, pyrolysis is carried out at a low temperature.

摘要翻译： 在处理放射性废离子交换树脂的方法中，废弃离子交换树脂在惰性气氛中热解，分解在热解过程中产生的有害的分解气体如硫和氮化合物。 接下来，用过的离子交换树脂在氧化气氛中热解，分离无害气体如二氧化碳和水蒸气。 优选的是，作为催化剂的过渡金属通过离子交换吸附到废阳离子交换树脂中，并且在两个热解步骤之前，通过离子交换将含有过渡金属的阴离子原子团吸附到废阴离子交换中。 热解在两个大气阶段进行，有害和无害气体分开分解。 在两个热解步骤中的热解在240〜420℃的温度范围内进行。热解后废离子交换树脂中的硫和氮化合物的比例以及废离子交换的处理体积 树脂可以减少。 可以防止放射性物质的散射。 通过向废离子交换树脂中加入催化剂，在低温下进行热解。

公开(公告)号：US4671897A

公开(公告)日：1987-06-09

申请号：US697384

申请日：1985-02-01

申请人： Kazuhide Mori ,  Shin Tamata ,  Makoto Kikuchi

发明人： Kazuhide Mori ,  Shin Tamata ,  Makoto Kikuchi

IPC分类号： G21F9/16 ,  G21F9/00 ,  G21F9/06 ,  G21F9/30

CPC分类号： G21F9/06 ,  G21F9/302

摘要： Radioactive waste is first converted into hardly water-soluble powder (including a water-insoluble powder) and then solidified with a hydraulic solidifier in a solidification vessel. The radioactive waste may be powdered (including granulated and encapsulated) by incorporating the radioactive waste with a substance which is capable of reacting with the water-soluble salt contained in the radioactive waste to form a hardly water-soluble salt (including a water-insoluble salt) and then powdering the mixture with drying, or by powdering the radioactive waste with drying, granulating the powder with drying and then microencapsulating the granules with a hardly water-soluble substance (including water-insoluble substance). The hardly water-soluble salts are preferably calcium salts, and the additives are preferably calcium hydroxide solution or solvent of combination of dichloromethane solution and hexane.

摘要翻译： 首先将放射性废物转化为几乎不溶于水的粉末（包括水不溶性粉末），然后用固化容器中的液压固化器固化。 放射性废物可以通过将放射性废物与能够与放射性废物中所含的水溶性盐反应形成几乎不溶于水的盐的物质（包括不溶于水的盐） 盐），然后干燥粉碎混合物，或通过干燥粉碎放射性废物，干燥制粒粉碎，然后用几乎不溶于水的物质（包括水不溶性物质）将颗粒微胶囊化。 难溶的水溶性盐优选为钙盐，添加剂优选氢氧化钙溶液或二氯甲烷溶液与己烷组合的溶剂。