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In [1], the ratio c between the external effective dose rates and the ambient dose equivalent rates 1 m above the ground obtained by airborne monitoring was chosen to be c ∼ 0.15, referring to reference [5] of [1]. Since reference [5] of [1] has recently been retracted due to ethical concerns [2], modifications listed below need to be applied to [1]. This, however, does not affect the conclusions of [1], since our choice of c ∼ 0.15 is supported by another independent study conducted in Fukushima, namely, reference [10] of [1] (c ∼ 0.13 for time spent at home and c ∼ 0.18 for time spent outdoors).
The following corrections need to be applied to [1]:
- 1.Page 311, the 2nd paragraph is to be replaced by the following:Meanwhile, Naito et al [10], targeting 38 voluntary residents of Iitate village, Fukushima Prefecture, found that the coefficient was c ∼ 0.13 for time spent at home and c ∼ 0.18 for time spent outdoors. In this paper, we take c to be 0.15, and draw annual 1 mSv isodose lines based on the airborne monitoring data.
- 2.Page 312, line 2, remove reference to [5].
- 3.Page 312, after equation (1), remove reference to [6], which has also been retracted due to ethical concerns [3].
- 4.Page 313, the 1st paragraph of results.Also superimposed are (hatched regions) the isodose bands between c = 0.10 (25th percentile) and c = 0.22 (75th percentile), reflecting the distribution of the factor c as presented in figure 5 of [5].
Also superimposed are (hatched regions) the isodose bands between c = 0.10 and c = 0.22 to indicate the effect of varying the factor c on the isodose lines. - 5.Page 313, the first 3 paragraphs in section 4 should read:After the FDNPP accident, an airborne monitoring method has been established and carried out regularly [7], and the ambient dose equivalent rates have been released as maps and numerical data [8]. Naito et al [9] used the airborne monitoring database and individual dosemeters (D- Shuttle) along with a global positioning system, possessed by approximately 100 voluntary participants, and obtained a conversion factor of c ∼ 0.2. In a more recent study by Naito et al [10], targeting 38 voluntary residents of Iitate village, Fukushima Prefecture, the coefficient was c ∼ 0.13 for time spent at home and c ∼ 0.18 for time spent outdoors. These studies have established that the personal dose equivalent and the ambient dose equivalent of the residential area from airborne monitoring are closely correlated.
- 6.Page 313, the 4th paragraph, remove reference to [5].
- 7.Figure 2 caption, remove '(25th percentile)' and '(75th percentile)'.
- 8.References: remove [5].
