公开(公告)号：US09947425B2

公开(公告)日：2018-04-17

申请号：US14909903

申请日：2014-08-08

申请人： AREVA GmbH

发明人： Bernhard Stellwag ,  Luis Sempere-Belda ,  Ute Ramminger

IPC分类号： G21F9/30 ,  G21C17/022 ,  G21C19/28 ,  G21F9/00 ,  G21F9/28 ,  G21C13/08 ,  G21C21/00

CPC分类号： G21F9/30 ,  G21C13/08 ,  G21C17/0225 ,  G21C19/28 ,  G21C21/00 ,  G21F9/004 ,  G21F9/28 ,  Y02E30/40

摘要： The invention relates to a method for reducing the radioactive contamination of the surface of a component used in a nuclear reactor, which component is in contact with radioactively contaminated water, in which method a hydrophobic film is produced on the surface of a component by virtue of the surface being wetted with an aqueous solution which contains a film-forming amphiphilic substance.

公开(公告)号：US20180033506A1

公开(公告)日：2018-02-01

申请号：US15548199

申请日：2015-02-05

申请人： Areva GmbH

发明人： Luis Sempere-Belda ,  Christian Guenther Topf

IPC分类号： G21F9/00 ,  C23G1/28 ,  C23G1/02 ,  G21F9/30 ,  G21F9/12

CPC分类号： G21F9/004 ,  C23G1/02 ,  C23G1/28 ,  G21C17/0225 ,  G21C19/28 ,  G21F9/001 ,  G21F9/12 ,  G21F9/28 ,  G21F9/30

摘要： A method of decontaminating metal surfaces in a cooling system of a nuclear reactor comprises conducting a plurality of treatment cycles, with each of the treatment cycles comprising: an oxidation step wherein metal oxides including radioisotopes on the metal surfaces are contacted with an aqueous solution of a permanganate oxidant; a decontamination step after the oxidation step wherein the metal oxides are contacted with an aqueous solution of an organic acid selected from the group consisting of oxalic acid, formic acid, citric acid, tartaric acid, picolinic acid, gluconic acid, glyoxylic acid and mixtures thereof so as to dissolve at least part of the metal oxides and the radioisotopes; and a cleaning step wherein at least the radioisotopes are immobilized on an ion exchange resin; wherein the oxidation step comprises at least one acidic oxidation step and at least one alkaline oxidation step carried out one after another in either the same or different treatment cycles; and wherein the plurality of treatment cycles comprises at least one treatment cycle including a high temperature oxidation step, wherein the permanganate oxidant solution is kept at a temperature of at least 100° C. and, wherein the at least one reactor coolant pump is used to circulate and heat the oxidation solution inside the primary loop, and the residual heat removal system is used to control the temperature of the oxidant solution during the high temperature oxidation step.

公开(公告)号：US09527756B2

公开(公告)日：2016-12-27

申请号：US14492265

申请日：2014-09-22

申请人： AREVA GMBH

发明人： Luis Sempere-Belda ,  Rainer Gassen ,  Bertram Zeiler ,  Jose Pedro Moreira Do Amaral

IPC分类号： C02F1/42 ,  C02F1/52 ,  C02F1/28 ,  C02F1/70 ,  C02F1/72 ,  G21F9/12 ,  C02F101/00

CPC分类号： C02F1/42 ,  C02F1/28 ,  C02F1/281 ,  C02F1/52 ,  C02F1/5236 ,  C02F1/5272 ,  C02F1/70 ,  C02F1/72 ,  C02F2101/006 ,  C02F2305/02 ,  C02F2305/023 ,  G21F9/12

摘要： A process removes radioactive contamination from wastewater obtained in the decontamination of a cooling circuit of nuclear reactors or of parts thereof or in the course of operation of a nuclear reactor. A MnO2 precipitate is exclusively produced in the wastewater with the aid of permanganate ions added thereto as an oxidizing agent and of one or more organic reducing agents present in and/or metered into the wastewater, and the MnO2 precipitate is separated from the wastewater.

摘要翻译： 一个过程消除了核反应堆或其零件的冷却回路去污或在核反应堆运行过程中获得的废水中的放射性污染物。 借助于作为氧化剂添加的高锰酸盐离子和存在于和/或计量到废水中的一种或多种有机还原剂，在废水中专门生产MnO 2沉淀物，并将MnO 2沉淀物与废水分离。