Indoor environment of temporary houses and general houses close to the Fukushima Daiichi Nuclear Power Plant following the Great East Japan Earthquake of 2011

SHINOHARA Naohide

doi:10.7879/siej.22.55

Published data on indoor environment of temporary houses and general houses following the Great East Japan Earthquake of 2011 are reviewed in the present paper. Indoor volatile organic compounds (VOCs) concentrations in temporary houses just after the construction did not exceed the indoor guideline value except for acetaldehyde and total VOC (TVOC). After occupation in temporary houses, indoor concentrations of p-dichlorobenzene exceeded the indoor guideline value in many houses. In addition, indoor NO₂ concentrations in temporary houses were quite high in the rooms where combustion heater was used. Hygrothermal condition in the temporary houses were uncomfortable levels in both summer and winter in most houses. Severe dew-condensation and fungi on the wall were observed in many temporary houses. Indoor levels of airborne fungi in the temporary houses were much higher than those previously reported in the general houses. The indoor airborne fungal levels in the houses in restricted residence area were correlate inversely with frequency of return to houses. Aspergillus section Circumdati, which can generate the carcinogenic ochratoxin, were observed in many houses in the restricted residence area. ¹³⁷Cs levels in the house dust in the houses in the difficult-to-return zone were much higher than those in the soils around the houses.

Indoor environment of temporary houses and general houses close to the Fukushima Daiichi Nuclear Power Plant following the Great East Japan Earthquake of 2011

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