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首页> 外文期刊>Annals of nuclear energy >Estimation of the amount of surface contamination of a water cooled nuclear reactor by cooling water analysis
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Estimation of the amount of surface contamination of a water cooled nuclear reactor by cooling water analysis

机译：通过冷却水分析估算水冷核反应堆的表面污染量

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Calculations, based upon on-the-spot measurements, were performed to estimate the contamination of NPP primary circuit and spent fuel storage pool solid surfaces via the composition of the cooling water in connection with a non-nuclear incident in the Paks NPP. Thirty partially burnt-up fuel element bundles were damaged during a cleaning process, an incident which resulted in the presence of fission products in the cooling water of the cleaning tank (CT) situated in a separate pool (P1). Since this medium was in contact for an extended period of time with undamaged fuel elements to be used later and also with other structural materials of the spent fuel storage pool (SP), it was imperative to assess the surface contamination of these latter ones with a particular view to the amount of fission material. In want of direct methods, one was restricted to indirect information which rested mainly on the chemical and radiochemical data of the cooling water. It was found that (ⅰ) the most important contaminants were uranium, plutonium, cesium and cerium; (ⅱ) after the isolation of P1 and SP and an extended period of filtering the only important contaminants were uranium and plutonium; (ⅲ) the surface contamination of the primary circuit (PC) was much lower than that of either SP or P1; (ⅳ) some 99% of the contamination was removed from the water by the end of the filtering process.
机译：进行了基于现场测量的计算，以通过与Paks NPP中无核事故有关的冷却水成分估算NPP一次回路和乏燃料存储池固体表面的污染。在清洁过程中损坏了30个部分燃烧的燃料元件束，该事件导致位于单独池（P1）中的清洁箱（CT）的冷却水中存在裂变产物的存在。由于这种介质与未损坏的燃料元件接触较长时间，以便以后使用，还与乏燃料存储池（SP）的其他结构材料接触，因此必须用一种燃料来评估这些介质的表面污染。特别要看裂变材料的量。由于缺乏直接方法，人们只能使用间接信息，这些信息主要取决于冷却水的化学和放射化学数据。发现（ⅰ）最重要的污染物是铀，p，铯和铈。 （ⅱ）分离P1和SP并延长过滤时间后，唯一重要的污染物是铀和p； （ⅲ）一次回路（PC）的表面污染远低于SP或P1的表面污染； （ⅳ）在过滤过程结束时，约有99％的污染物已从水中去除。

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