Aristotle University of Thessaloniki, Atomic & Nuclear Physics Laboratory, Thessaloniki 54124, Hellas, Greece.
Aristotle University of Thessaloniki, Atomic & Nuclear Physics Laboratory, Thessaloniki 54124, Hellas, Greece.
J Environ Radioact. 2014 Feb;128:68-74. doi: 10.1016/j.jenvrad.2013.11.007. Epub 2013 Dec 7.
The background radiation level of (137)Cs at the urban atmosphere of Thessaloniki has been increased during the recent decade only due to the Fukushima accident fallout. Since then, no other signal of (137)Cs was observed until the winter period of 2013, when slightly elevated (137)Cs concentrations were measured. The (137)Cs signals observed were up to 12 μBq m(-3), mainly during holidays and weekends followed by lower or even non-detectable activities in the next working days. Those episodes are attributed to the increase of biomass products combustion for residential heating as this year the tax of oil for heating was drastically raised as a consequence of the financial crisis. A preliminary survey of various wood products as well as of bottom ashes from different domestic burning devices is presented. (137)Cs concentrations up to 11 Bq kg(-1) were measured in wood products and up to 500 Bq kg(-1) in ash samples.
（137）Cs 在塞萨洛尼基城市大气中的本底辐射水平仅在过去十年中因福岛事故沉降物而有所增加。从那时起，直到 2013 年冬季，才观察到其他（137）Cs 信号，当时测量到略高的（137）Cs 浓度。观察到的（137）Cs 信号高达 12 μBq m(-3)，主要发生在假期和周末，随后在下一个工作日的活动减少或甚至无法检测到。这些事件归因于用于住宅取暖的生物质产品燃烧的增加，因为今年由于金融危机，取暖用石油税大幅提高。本文初步调查了各种木制品以及来自不同家用燃烧装置的底灰。在木制品中测量到高达 11 Bq kg(-1)的（137）Cs 浓度，在灰烬样品中测量到高达 500 Bq kg(-1)的（137）Cs 浓度。
