Table 1.

Personal dose equivalent for residents over a 2-mo period (August–September 2012)

AreaDeep dose equivalent; 10 mm depth, mSv/2 mo*
Kawauchi village, n = 382
 Range (median)0.04–1.2 (0.14)
 Mean ± SD0.17 ± 0.10
 GM (GSD)0.15 (1.6)
Tamano area of Soma city, n = 50
 Range (median)0.17–1.1 (0.44)
 Mean ± SD0.46 ± 0.18
 GM (GSD)0.42 (1.5)
Haramachi area of Minamisoma city, n = 27
 Range (median)0.14–0.40 (0.26)
 Mean ± SD0.28 ± 0.07
 GM (GSD)0.27 (1.3)
  • * External dose rate from natural radiation was subtracted using literature data before the FDNPP accident (0.63 mSv/y in Kawauchi and Tamano; 0.61 mSv/y in Haramachi) (25, 26).