Jiránek M, Kačmaříková V
Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29 Praha 6, Czech Republic
Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29 Praha 6, Czech Republic.
Radiat Prot Dosimetry. 2014 Jul;160(1-3):43-7. doi: 10.1093/rpd/ncu104. Epub 2014 Apr 11.
The influence of energy-saving measures on indoor radon concentration has been studied on the basis of a family house made of clinker concrete wall panels containing from 1000 up to 4000 Bq kg(-1) of 226Ra. Thermal retrofitting based on installing external thermal insulation composite system on the building envelope and replacing existing windows by new ones decreased the annual energy need for heating 2.8 times, but also reduced the ventilation rate to values<0.1 h(-1). As a consequence, the 1-y average indoor radon concentration values increased 3.4 times from 337 to 1117 Bq m(-3). The additional risk of lung cancer in the thermally retrofitted house increased to a value that is 125 % higher than before conversion. Methods for dealing with this enhanced risk by increasing the ventilation rate are discussed. Recovery of investments and the energy consequences of increased ventilation are studied in a long-term perspective.
基于一座由含有1000至4000 Bq kg⁻¹镭-226的煤渣混凝土墙板建造的住宅，研究了节能措施对室内氡浓度的影响。基于在建筑围护结构上安装外墙外保温复合系统以及用新窗户替换现有窗户的热改造，使年度供暖能源需求降低了2.8倍，但通风率也降低到了<0.1 h⁻¹的值。结果，1年平均室内氡浓度值从337 Bq m⁻³增加到1117 Bq m⁻³，增长了3.4倍。热改造房屋中肺癌的额外风险增加到比改造前高125%的值。讨论了通过提高通风率来应对这种增加的风险的方法。从长期角度研究了投资回收以及增加通风的能源后果。
