Table 1: Individual dose groups, thyroid cancer incidence rates and thyroid doses based on UNSCEAR 2020/2021 for 10-year-old children.

Dose group

Incidence

/10,000 PY

Mean thyroid dose

/GyUN2021 (a)

BLD=0 *

Mean thyroid dose

/GyUN2021 (b)

BLD=4.45 mGy

Corresponding dose in Chernobyl /Gy (c)

Conversion coefficient

k = (c)/(a)

Conversion coefficient

k = (c)/(b)

high (2 mSv)

3.02

0.0173

0.0218

1.46

86

67

middle (1-2 mSv)

1.99

0.0101

0.0146

0.95

95

65

low (<1 mSv)

1.12

0.0034

0.0079

0.52

153

67

Weighted average

by No of examinee

1.56

0.0067

0.0112

0.74

110

66

 

*Converted thyroid dose (Gy) of the third column in (Table 1) of Reference [1]: “0.0197, 0.0115, 0.0038, 0” were thyroid doses for 1-year-old infants. They should be corrected for 10-year-old children as “0.0173, 0.0101, 0.0034, 0” as in this (Table 1), third column. The analyses and Figures in [1] were based on thyroid doses for 10-year-old children.