ǰǾǰó(ó ǰ) Ϻ ķĽ(FlowFushi) ϰ ߾Ƽͳų ‧Ǹ ī ȭǰ 10 ǰ 缺 (Th-232) (U-238) Ǿ ش ǰ ǸŸ ߴϰ ȸ ġߴٰ 7 .
̹ ġ û ǥ缱 ġ ʰ ̷ ִ ǰ ǰ š˻ ȭǰ (缺) ȮεǾ ȸ ġϿ, Ȱֺ 缱 (1 mSv/y) ٴ ſ ̶ ߴ.
ľó û, ڷ¾ȸ Բ ȭǰ ܰ ȭϴ , Ǹ ġ š˻縦 ǽϰ Ի翡 ǰ ˻ αԸ Ի ǹ ȭ ȹ̴.
, ľó "ش ǰ Һڲ Ի Ǵ ó ǰֱ ٶ." ߴ.
( = ǰǾǰó)