Table 2 The numbers of children who participated in the PBLS and the FSS of the TUE program and the thyroid cancer cases for FSS and for PBLS in the six areas classified on the basis of radiation levels. The air-dose rate and the amount of radioactivity of 131I in each area are shown in the 6th and 7th columns. The values in brackets (n) show the number of children in each of the six areas who are formally diagnosed with thyroid cancer (malignant or suspected) following the secondary examination. The values \(n{\prime} \) are the corrected numbers using Eq. (1).
Area | FSS | Cancer | PBLS | Cancer | Air-dose rate | 131I |
|---|---|---|---|---|---|---|
(Total) | \({\boldsymbol{n}}{\prime} \)(n) | (Total) | \({\boldsymbol{n}}{\prime} \)(n) | [ÎĽSv/h] | [kBq/m2] | |
1 | 29,471 | 12.8 (11) | 35,344 | 11.1 (10) | 4.23 | 6.08 |
2 | 64,339 | 22.1 (19) | 72,299 | 22.1 (21) | 1.07 | 0.92 |
3 | 86,981 | 30.8 (25) | 96,541 | 47.6 (44) | 0.74 | 0.37 |
4 | 45,265 | 11.0 (9) | 49,430 | 25.4 (24) | 0.34 | 0.88 |
5 | 12,247 | 2.4 (2) | 13,139 | 4.4 (4) | 0.27 | 0.15 |
6 | 32,207 | 6.7 (5) | 33,720 | 13.1 (12) | 0.18 | 0.45 |
