Neptunium dioxide-plutonium dioxide dissolver for hot chamber

A neptunium dioxide and plutonium dioxide technology, which is applied in the field of neptunium dioxide-plutonium dioxide dissolvers for hot cells, can solve problems such as difficult dissolution of hot nitric acid

Active Publication Date: 2020-05-26
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Neptunium and plutonium elements are produced in the neptunium target in the form of neptunium a

Method used

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  • Neptunium dioxide-plutonium dioxide dissolver for hot chamber
  • Neptunium dioxide-plutonium dioxide dissolver for hot chamber

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] A neptunium dioxide-plutonium dioxide dissolver for a hot cell provided by the present invention is used for dissolving a neptunium target containing neptunium and plutonium elements in a hot cell, and is composed of a dissolution tank 1, an integral electrode 14, and a circuit plug Components, hydraulic plug components and control system.

[0030] Such as figure 2 As shown, the dissolution tank 1 is a vertical double elliptical head container (about 1000-1500mm in length, 1000-1500mm in width, and 1500-3000mm in height), resistant to strong acid and high temperature, and made of metal titanium or stainless steel, etc., which are resistant to nitric acid corrosion The material is divided into an upper tank body and a lower tank body. The upper tank body and the lower tank body are connected by a flange 2, and a fluorine rubber sealing ring is u...

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Abstract

The invention belongs to the technical field of spent fuel aftertreatment, and particularly relates to a neptunium dioxide-plutonium dioxide dissolver for a hot chamber, which is used for dissolving aneptunium target containing neptunium and plutonium elements in the hot chamber, and comprises a strong acid-resistant and high temperature-resistant dissolving tank (1). A heating device is arrangedat the periphery of the dissolving tank (1); a cleaning pipe (4) used for adding nitric acid into the dissolving tank (1), a feeding pipe (5) used for adding a dissolving solution, a bubbling pipe (6) used for introducing disturbing gas into the dissolving solution in the dissolving tank (1), and a discharging pipe (7) used for discharging the dissolving solution are arranged on the dissolving tank (1) in a penetrating manner; the integral electrode (14) is arranged in the dissolving tank (1) in a replaceable and penetrating manner; and a control system for remotely operating the replacementof the integral electrode (14) is also included. The dissolver can be applied to a hot chamber to dissolve a neptunium target; the dissolution reaction can be remotely operated through a manipulator in the hot chamber; and the neptunium target is fully dissolved.

Description

technical field [0001] The invention belongs to the technical field of spent fuel reprocessing, and in particular relates to a neptunium dioxide-plutonium dioxide dissolver for a hot cell. Background technique [0002] After the neptunium target (irradiation target) is irradiated out of the reactor, it contains converted plutonium and remaining neptunium and other radioactive elements. Before the chemical extraction and separation of neptunium and plutonium, it is first necessary to extract A neptunium target of plutonium element is dissolved. Neptunium and plutonium elements are produced in the neptunium target in the form of neptunium and plutonium oxides, but hot nitric acid is difficult to dissolve neptunium and plutonium oxides. [0003] Catalytic indirect electrochemical oxidation technology can be used for NpO 2 , PuO 2 For dissolution, the catalytic electrochemical oxidation technology using Ag(II) as a catalyst can realize rapid and complete dissolution of insolu...

Claims

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Application Information

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IPC IPC(8): G21C19/46
CPCG21C19/46Y02W30/50Y02E30/30
Inventor 何辉唐洪彬朱礼洋常尚文叶国安郭建华刘聪李斌刘占元刘协春李峰峰蒋德祥申震周贤明
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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