Dear Wangqingshui,

First of all we sincerely regret the inconvenience you encountered
regarding the recent nuclear issue at Fukushima, Japan.

As of now, your flight is expected to fly over
the southern area from the nuclear site.
Please let me explain further about this issue.

As a countermeasure regarding the nuclear issue,
Japanese aviational bureau has established a prohibited area
for flying-over with the radius of 30 kilometers.

The route for your flight is approximately 40 kilometers away
from the border of prohibited area at the closest point,
and if the radius of 30 kilometers is taken into consideration,
the total distance will be 70 kilometers away
from the actual nuclear site at Fukushima, Japan.

We once again regret the inconvenience you had gone through.
Korean Air hopes to serve you to the best of our ability in the future.


Sincerely,


(FirstName LastName)
Manager
Operations Control Department
Korean Air

找了点资料给你看，希望能让你宽点心。

主持人：在上个时段里我们也提到了像切尔诺贝利的爆炸可能是通过平流层核辐射就会扩散到很大的范围，现在我们看日本的核泄漏的辐射，主要可能通过什么来传播？

郁祖盛：以气溶胶方式的气象传播可以分为高架传播和低架传播，所谓高架传播就是这个放射源的地方，也就是泄漏的地方是属于一个上升气流，还是一个下降气流，那就和当地的气象条件有关系，如果说你的气象压力很低，基本上是叫低架排放，贴着地面跑它不会走得很远。再一个要看放射源出来以后的能量，好比说切尔诺贝利事故的情况，本身是很热的一团气体，热的东西往上跑，很快的上升到平流层，而像一号堆，它已经冷却下来了，即使有放射性释放，好比三号堆现在要排放，这个排放的能量是和切尔诺贝利无法比的，所以通俗的讲比较温和的排放。属于一种低价的比较温和的排放，影响的范围有限。

总结一下：如果日本核辐射的爆炸范围似切尔诺贝利核电站那样，有可能会到达飞机飞行的平流层，但是据目前的情况来看，日本的情况应该不会影响到平流层。