Because the situation is alarming. There is still a great deal of uncertainty about where the melted-down fuel at Fukushima I’s reactors is resting. TEPCO and various NPA’s have insisted all along that they know where it is, and everything is under control. The most recent information from TEPCO is that the fuel is contained…

In the beginning of the Fukushima Nuclear Crisis, in the hours and days after the earthquake and tsunami struck, nuclear power experts assured us that no matter how bad it seemed, nuclear material would stay in the reactors. It was unlikely that the reactors would melt down, and if they did melt down a little,…

There is a lot of news in Ana’s Feed about the nuclear power industry world wide, as well as across Japan, and especially disturbing news related to the Fukushima plant in particular. In brief, the main reason that the situation at these reactors seems to be kinda-sorta under control (as in the water in the…

The radiation at the Fukushima plants has gone up, rather than down, since June. This may be because contaminated water has become more concentrated due to evaporation. The release of radiation from the plant into the air continues, although a covering over Reactor 1 is almost completed. The release of radiation from the plant into…

The latest update on the crisis in Fukushima. The hot spots are everywhere. Be careful where you step! But first, we’d like to introduce the handy-dandy Fukushima Post and Ana’s Feed search engine. This search engine will return results from this series of posts we’ve done. This is a good place to start if you…

For the purposes of discussion in the Japan Disaster threads, I’ve made a graphic that very roughly approximates the zone of likely future very high rates of cancer if the Fukushima nuclear power plant were located where our (somewhat similar but smaller) plant is located, upwind during the winter of the Twin Cities. The lightened…

It has been Just over six months since a magnitude 9 earthquake and ensuing tsunami struck the Fukushima Daiichi Nuclear Power Plant. In the hours following that incident, nuclear power protagonists filled the blogosphere, the news outlets, and other media with assurances that little could go wrong, that the reactors would be managed, that the…

Things at Fukushima are about as interesting as they’ve ever been. We want to talk about specific problems at the reactor site, with radioactive material, cooling systems, etc. but first a few words about things happening more broadly, beginning with the largest and work towards the smallest scale. Everything we discuss here is based on…

In the old days this was easy. The power plants were melting down but no one knew what was going on inside them; Water was being poured in and cooking off as steam, and every now and then the way they were getting the water in or the way they were powering the pumps would…

The International Atomic Energy Association issued its last report on Fukushima on June 2nd and appears to not be keeping their web site up to date any more. This is the last time I’ll be checking with them unless I hear otherwise. The email scandal reported last time continues “Analysts say the scandal reflects panic…

The Fukushima Update #30 has been translated into German. So if German is your preferred language, you can go read it here. Thanks Frank Braun for the translation.

Perhaps the most interesting single thing on the table in today’s update is the revelation that at least one of Fukushima’s reactors suffered sufficient damage from the earthquake that hit the region … prior to the tsunami … to have likely gone out of control or melted down. This is hard to assess because the…

Much of the current news is about exposure and fallout. As a point of information, the Sievert is a unit of “dose equivliant” from exposure to ionizing radiation. It was designed to indicate relative levels of biological effects on living organisms. This measurement technique attempts to take into account the fact that radiation is absorbed…

There is an increase in reports of activity of scientists studying the extent and impacts of radiation spilled or otherwise transferred into the ocean from Fukushima. TEPCO, in the meantime, seems to have a need to put a lot more water, possibly decontaminated to some degree, into the sea. Similarly, there is a plan afoot…

We often drive on a stretch of Minnesota State Route 10 that runs from Elk River to Big Lake and eventually to a point past Saint Cloud that takes about an hour to drive on a normal day, and we see trains. The railroad track runs along this route, and during the hour it takes…

In terms of radiation fallout Fukushima is said to be approaching Chernobyl by at least certain measures, and the potential for Fukushima to be worse in terms of total radioactive material released is very real. However, the two disasters really can’t be compared sensibly because the circumstances of release, and the potential effects, are very…

Even as the situation at the troubled Fukushima Nuclear Reactors … well, remains troubled … the post-game analysis of what went wrong and what could have been done better develops. It is becoming clear that the plant had no real plan for the event of a tsunami even though it was built at an elevation…

It is possible that the bottom will fall out of the Fukushima Reactor 4 spent fuel tank. Efforts are being made to shore up the concrete structure. There is no longer any doubt that those mysterious holes hypothesized, seen or not see, in some of the reactor vessels are for real. It is now established…

The worker’s death was probably unrelated to the nuclear disaster, but it can’t help moral much at the crippled site. Fission and cooling still remain issues at the Fukushima plant. Although fission is not happening to any large degree, or possibly at all, there has been fission more recently than many expected, and there is…

There is a lot happening in Japan, and the situation at Fukushima remains pretty much out of human control. There is a nuclear incident at a reactor site other than Fukushima. There is still quite a bit of radioactive material leaking into the sea. The radiation levels in the crippled Fukushima plants is still high…

Worker exposure to high levels of nuclera radiation and the distribution of radioactive materials about the landscape and in possibly unexpected places are the stories of the week at Fukushima. Also, officials are wondering, how have the potential effects of a tsunami at Fukushima (and, apparently, it is possible to have a tsunami here) changed…

The reactors at Fukushima continue to be hotter than “cold shutdown” levels, and at least one reactor (#1) is probably leaking from the core containment vessel. Fission products in high amounts, high pressure, and high temperature indicate that something close to fission is still happening although an apparent lack of large quantities of short lived…

Tokyo Electric officials have noted that they can not rule out the possibility that fuel rods in the Fukushima reactors have melted, at least to some extent. No one else, as far as I can tell, thinks that fuel rods have not melted. A Question that is more important than that of Tokyo Electric’s sudden…