公开(公告)号：EP0324862A1

公开(公告)日：1989-07-26

申请号：EP88906085.1

申请日：1988-07-13

申请人： HITACHI, LTD.

发明人： SASAKI, Yuko 3-68-402, Shiraume 2-chome ,  HONDA, Takashi 2917-24, Mawatari ,  SHOJI, Saburo 7-6, Moriyama-cho 2-chome ,  KOBAYASHI, Shiro 19-1-402, Ishinazaka-cho 1-chome ,  FURUTANI, Yasumasa 287, Takaba

IPC分类号： G21C19/46 ,  C23F15/00

CPC分类号： G21C19/46 ,  Y02W30/883 ,  Y10S422/903

摘要： This invention relates to a nuclear fuel reprocessing plant for processing a spent nuclear fuel with a nitric acid solu­tion, which is provided with an electrolytic reduction apparatus for reducing the valence of oxidizing metal ions consisting of the nuclear fuel dissolved in the nitric acid solution while their ionic states are kept. The invention relates also to a method of preventing corrosion of a nuclear fuel processing plant for processing a spent nuclear fuel with a nitric acid solution, wherein the valence of oxidizing metal ions consisting of the nuclear fuel dissolved in the nitric acid solution is reduced while their ionic states are kept and electrolytic reduction is carried out so as to generate NO x gas. Thus, the ob­jects of the invention are to provide a nuclear fuel reprocessing plant having a corrosion-proofing system which prevents the corrosion of the apparatus without permitting the precipitation of corrosive metal ions in the nitric acid solution in the form of metal, and the method of corrosion-proofing such a plant.
ABSTRACT
In a nuclear fuel reprocessing plant for processing a used nuclear fuel by a nitric acid solution, the present invention provides a nuclear fuel reprocessing plant characterized by including electrolytic reduction means for reducing the valence of oxidizing metal ions consisting of the nuclear fuel and dissolved in the nitric acid solution while they are kept under the ionic state. In a processing method of a nuclear fuel reprocessing plant for processing a used nuclear fuel by a nitric acid solution, the present invention provides also a corrosion-proofing method of a nuclear fuel reprocessing plant characterized in that electrolytic reduction is carried out so that the valence of oxidizing metal ions consisting of the nuclear fuel and dissolved in the nitric acid solution is reduced while the metal ions are kept under the ionic state and NOx gas is also generated. The invention is directed to provide a nuclear fuel reprocessing plant and its corrosion-proofing method which prevents corrosion of equipment without allowing the precipitation of corrosive metal ions in a nitric acid solution as the metals.

摘要翻译： 用硝酸溶液处理废核燃料的核燃料后处理厂。 设有电解红。 约会。 用于降低由溶解在硝酸溶胶中的核燃料组成的氧化金属离子的价态。 而它们的离子状态保持不变。 为了防止核燃料后处理厂用硝酸溶液处理废核燃料的腐蚀，由溶解在硝酸溶液中的核燃料组成的氧化金属离子的价态。 在其离子状态保持并且进行电解还原以便产生NOx气体的同时被还原。 目的是提供一个具有防腐蚀系统的核燃料后处理设备，以防止喷嘴的腐蚀。 不允许pptn。 的硝酸溶液中的腐蚀性金属离子。 以金属的形式，并对这种植物进行防腐蚀。

公开(公告)号：EP0324862B1

公开(公告)日：1994-11-09

申请号：EP88906085.1

申请日：1988-07-13

申请人： HITACHI, LTD.

发明人： SASAKI, Yuko 3-68-402, Shiraume 2-chome ,  HONDA, Takashi 2917-24, Mawatari ,  SHOJI, Saburo 7-6, Moriyama-cho 2-chome ,  KOBAYASHI, Shiro 19-1-402, Ishinazaka-cho 1-chome ,  FURUTANI, Yasumasa 287, Takaba

IPC分类号： G21C19/46 ,  C23F15/00

CPC分类号： G21C19/46 ,  Y02W30/883 ,  Y10S422/903

摘要： This invention relates to a nuclear fuel reprocessing plant for processing a spent nuclear fuel with a nitric acid solution, which is provided with an electrolytic reduction apparatus for reducing the valence of oxidizing metal ions consisting of the nuclear fuel dissolved in the nitric acid solution while their ionic states are kept. The invention relates also to a method of preventing corrosion of a nuclear fuel reprocessing plant for processing a spent nuclear fuel with a nitric acid solution, wherein the valence of oxidizing metal ions consisting of the nuclear fuel dissolved in the nitric acid solution is reduced while their ionic states are kept and electrolytic reduction is carried out so as to generate NOx gas. Thus, the objects of the invention are to provide a nuclear fuel reprocessing plant having a corrosion-proofing system which prevents the corrosion of the apparatus without permitting the precipitation of corrosive metal ions in the nitric acid solution in the form of metal, and the method of corrosion-proofing such a plant.