注目の話題: コンビニ店員、怖い; ピアノが弾けるは天才; 娘がビスコ坊やに似てると言われました

Let's enjoy English!Ⅱ

No.127　13/10/09 12:14
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【What should we do on settlement of the fission product?】

《Abolishment of an atomic reactor》

The problem is the body of the nuclear reactor.In short,a hangar and its inside.It's filled with radioactive materials.💀

Their half-life 半減期 are very long period.The ones are several years,the others dozens of years,moreover anothers are by far longer than them.⚠

We have to keep those toxic substance in the atomic reactor until the radioactive materials vanish.What should we do?😨

By the way,what's the half-life?It's a kind of reaction of atomic nucleus.Some react quickly, others slow.They are varied.😃

When continuing to react,the substance becomes half amount.Then it takes time.We call it the half-time.😃

Let's suppose there was a chemical material of which half-time were ten days.After ten days,it becomes half.and after more ten days,does it disappear?☝

No,it's just that it becomes a quarter.Then one-eighths,next,one-sixteenths.Strictly speaking,it'll never disappear forever.⚠