Abstract

The author previously proposed that glassy cesium-bearing microparticles [resulting uniquely from the Fukushima Daiichi nuclear power station (FDNPS) accident] may have been formed by melting and atomization of glass fibers (GFs) of the high-efficiency particulate air filter in the standby gas treatment system line due to the flame and blast during the hydrogen explosion in Unit 3. Assuming that this hypothesis is correct, Type A could contain or accompany carbon, which ignites spontaneously above 623 K, because of the limited time to be heated up, the inclusion of carbon in the binder applied on the GF surface, and the closely located charcoal filter. As previous studies have not identified carbon, the present analyses were performed with an electron probe microanalyzer to determine whether Type A contains carbon. The results show that Type A contained carbon originating from the binder. Some nonspherical particles were accompanied by Type A, and the film surrounding Type A contained more carbon, which is thought to originate from the charcoal filter. These results cannot be explained by the other mechanisms proposed so far and can be explained consistently only by the author’s proposed hypothesis. Although it may be premature to determine Type A formation mechanisms, this information enables one to limit the temperature conditions of Type A formation.

摘要

作者之前提出，玻璃状含铯微粒[仅由福岛第一核电站 (FDNPS) 事故造成] 可能是由备用的高效微粒空气过滤器的玻璃纤维 (GFs) 熔化和雾化形成的由于 3 号机组氢爆炸过程中的火焰和爆炸造成的气体处理系统管线。假设该假设正确，A 型可能含有或伴随碳，由于加热时间有限，碳在 623 K 以上自燃， GF表面的粘合剂中包含碳，以及靠近的木炭过滤器。由于以前的研究没有确定碳，因此目前的分析是用电子探针微量分析仪进行的，以确定 A 型是否含有碳。结果表明，A 型含有源自粘合剂的碳。一些非球形颗粒伴随着A型，而A型周围的薄膜含有更多的碳，这被认为来自木炭过滤器。这些结果不能用迄今为止提出的其他机制来解释，只能通过作者提出的假设来解释。尽管确定 A 型地层机制可能为时过早，但这一信息使人们能够限制 A 型地层的温度条件。这些结果不能用迄今为止提出的其他机制来解释，只能通过作者提出的假设来解释。尽管确定 A 型地层机制可能为时过早，但这一信息使人们能够限制 A 型地层的温度条件。这些结果不能用迄今为止提出的其他机制来解释，只能通过作者提出的假设来解释。尽管确定 A 型地层机制可能为时过早，但这一信息使人们能够限制 A 型地层的温度条件。