Radionuclide

Annual effective dose (mSv/y)

Children

Adults

²²⁶Ra

Minimum

0.067

0.018

Maximum

0.275

0.102

Average

0.215

0.057

²³²Th

Minimum

0.005

0.004

Maximum

0.027

0.035

Average

0.024

0.031

⁴⁰K²²

Minimum

0.007

0.006

Maximum

0.529

0.616

Average

0.020

0.024

Total average annual effective dose

0.259

0.112