元： Paul Atkinson ２０１１年３月１５日６時５５分
●チェルノブイリとは全く別な状況です。チェルノブイリの場合、原子炉が完全メルトダウンし、手を付けずに何週間も燃え続けた。チェルノブイリでさえ、３０キロ（訂正前：５０キロ） に避難ゾーンがもしできたら、十分に人の健康を守ることはできたでしょう。チェルノブイリの場合、事件から何年も後まで現地の食料や水に含まれた放射能は 一切モニタリングされなかったと、危険性についての情報も全く知らせなかったせい、汚された食品、麦、牛乳や水などを食べ続けた現地の人々が病気になっ た。事実は隠されたチェルノブイリの事件とくらべ、今回の非常に開かれた福島の事件もその意味でも大きく異なるでしょう。
Japan Nuclear Update - British Embassy
I have just returned from a conference call held at the British Embassy in Tokyo. The call was concerning the nuclear issue in Japan. The chief spokesman was Sir. John Beddington, Chief Scientific Adviser to the UK Government, and he was joined by a number of qualified nuclear experts based in the UK. Their assessment of the current situation in Japan is as follows:
* In case of a 'reasonable worst case scenario' (defined as total meltdown of one reactor with subsequent radioactive explosion) an exclusion zone of 30 km would be the maximum required to avoid affecting peoples' health. Even in a worse situation (loss of two or more reactors) it is unlikely that the damage would be significantly more than that caused by the loss of a single reactor.
* The current 20km exclusion zone is appropriate for the levels of radiation/risk currently experienced, and if the pouring of sea water can be maintained to cool the reactors, the likelihood of a major incident should be avoided. A further large quake with tsunami could lead to the suspension of the current cooling operations, leading to the above scenario.
* The bottom line is that these experts do not see there being a possibility of a health problem for residents in Tokyo. The radiation levels would need to be hundreds of times higher than current to cause the possibility for health issues, and that, in their opinion, is not going to happen (they were talking minimum levels affecting pregnant women and children - for normal adults the levels would need to be much higher still).
* The experts do not consider the wind direction to be material. They say Tokyo is too far away to be materially affected.
* If the pouring of water can be maintained the situation should be much improved in time, as the reactors' cores cool down.
* Information being provided by Japanese authorities is being independently monitored by a number of organizations and is deemed to be accurate, as far as measures of radioactivity levels are concerned.
* This is a very different situation from Chernobyl, where the reactor went into meltdown and the encasement, which exploded, was left to burn for weeks without any control. Even with Chernobyl, an exclusion zone of 30 km would have been adequate to protect human health. The problem was that most people became sick from eating contaminated food, crops, milk and water in the region for years afterward, as no attempt was made to measure radioactivity levels in the food supply at that time or warn people of the dangers. The secrecy over the Chernobyl explosion is in contrast to the very public coverage of the Fukushima crisis.
* The Head of the British School asked if the school should remain closed. The answer was there is no need to close the school due to fears of radiation. There may well be other reasons - structural damage or possible new quakes - but the radiation fear is not supported by scientific measures, even for children.
* Regarding Iodine supplementation, the experts said this was only necessary for those who had inhaled quantities of radiation (those in the exclusion zone or workers on the site) or through consumption of contaminated food/water supplies. Long term consumption of iodine is, in any case, not healthy.
The discussion was surprisingly frank and to the point. The conclusion of the experts is that the damage caused by the earthquake and tsunami, as well as the subsequent aftershocks, was much more of an issue than the fear of radiation sickness from the nuclear plants.
Let's hope the experts are right!