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No.293　13/01/20 21:59
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【What is the radioactive material 放射性物質?】

《Size of the radioactive material》

The most famous radioactive material is uranium.It's a kind of a metal,and emits radiation,so it becomes not only a lump such as hundreds of grams,but an invisible atom.😃

When being thrown into a reactor as fuel,the uranium becomes a pellet as an oxide 酸化物.The pellet is a very small ball.Its diameter is about no more than 1cm.😃

The uranium is burned,and is made hard.It's a pellet.😃

《The radioactive and a pollen 花粉》

The radioactive material which is carried in all directions on the wind resembles a pollen in a sense.🌷

The radioactive material is invisible and drifts into the air like the pollen,and it's so tiny that we can't see it with our own eyes,but it's just the material.😃

We can defend the radioactive to some extent if we wear masks,and a wet masks are more useful.🙆

If we close the windows,the radioactive material never goes into a house.😃