The radioactive substances can be brought into human body by eating rice, and ^90Sr is a by-product of nuclear fission which is found in nuclear fallout and presents a health problem since it substitutes for calcium in bone, preventing expulsion from the body. We conducted the experimental study on the contribution of ^90Sr on the rice and chaff total β radioactivity of 10 kinds paddy in different parts of Hengyang. We found out that the average contribution rate of ^90Sr β radiation on the rice total radiation is 9.6%± 6.2 %; and the averag...
