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21. 发明授权

US4940564A Suppression of deposition of radioactive substances in boiling water type, nuclear power plant 失效
标题翻译：禁止放射性物质在沸水型沉积，核电厂
公开(公告)号：US4940564A
公开(公告)日：1990-07-10
申请号：US110454
申请日：1987-10-20
申请人： Motohiro Aizawa , Katsumi Ohsumi , Takashi Honda , Hisao Itow
发明人： Motohiro Aizawa , Katsumi Ohsumi , Takashi Honda , Hisao Itow
IPC分类号： G21D1/00 , G21C17/022 , G21C19/28 , G21D3/08
CPC分类号： G21C17/0225 , G21C19/28
摘要： In a boiling water-type, nuclear power plant, deposition of radioactive substances on the surfaces of out-of-core components in the primary cooling water system in the nuclear power plant is suppressed by injecting an alkaline element into reactor water in the presence of more than an amount of the oxygen formed by nuclear fission of the reactor water and dissolved in the reactor water, particularly without hydrogen gas injection, during the nuclear heatup operation period of a boiling water type, nuclear power plant and circulating the injected alkaline element through the primary cooling water system of a nuclear reactor, thereby forming an oxide film on the surfaces of out-of-core components in the primary cooling water system of the nuclear reactor. Exposure of plant personnel to radioactivity can be reduced thereby. The present boiling water-type, nuclear power plant is provided with a means for forming such oxide film.
摘要翻译：在沸水型核电厂中，通过在碱性元素的存在下将碱性元素注入反应器水中来抑制放射性物质沉积在核电厂初级冷却水系统中的核心外部组分的表面上在沸水型核电厂的核加热运行期间，通过反应器水的核裂变形成的氧气量多于溶解在反应器水中的气体，特别是不喷射氢气，并使注入的碱性元素循环通过核反应堆的一级冷却水系统，从而在核反应堆的一级冷却水系统中的核心部件的表面上形成氧化膜。因此可以减少植物人员暴露于放射性。现在的沸水型核电厂设有形成这种氧化膜的方法。

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