today i'm talking to robert patterson he's an associate fellow at chatham house and also the or fellow of a book on the power industry called keeping the lights on well thank you very much for talking now the situation in japan is we've seen several explosions at fukushima nuclear power plant what do you think the chances are that we may see more and the situation carrying on i'm sure that the people working on the site hope that they've got it under control but they seem to be releasing an awful lot of hydrogen from at least three reactors and now from a fuel point as well and hydrogen is an explosive gas if it's confined mixed with air it produces it can produce very dramatic explosions as we've seen so that's clearly a. major concern for them but i think the explosion problem is almost the least of their problems at the moment because what it has done to the reactors we don't know we don't know who hasn't apparently damaged the containment or the reactor pressure vessels themselves although i gather there may be a hole in one of the containment and at unit two but what bothers me an