quick update on J-PARC situation

2011/04/01 // 0 Comments

Their analysis on the 28th of March of the damage on the site and much of the equipment is available in this PDF: External damage is impressive, but due to sturdy construction in most places that matter most, it looks like the experimental equipment survived relatively unscathed. Here’s hoping that they can get things running smoothly once sufficient power is back! And I tip my hat to the engineers of the buildings!


Lessons in outreach to be learned from Japan’s disasters

2011/03/21 // 3 Comments

(warning: this rather lengthy piece may contain personal opinions and has little to do with small-angle scattering. There is a nice bit about graphics, though.)   In the wake of the global public panic following the reporting around the nuclear reactor struggles (as opposed to the expected >15 kilopeople deaths in Myagi prefecture due to the tsunami alone), perhaps it is time for us to consider what we can learn from the way the media and the educated dealt with these developments. For us, it can be used to gain insight into how to communicate with journalists, and we can come up with ideas about what we (the (educated) public) could do better in this situation. In summary, the following events happened in rapid succession: After the initial strike of an earthquake with its epicenter off the coast of north-east Japan, a tsunami struck the coast of north-east Japan (but fortunately not entering Tokyo Bay), wiping out some villages along the coastline and causing the large majority of the casualties of the event. Trains went missing and an airport was flooded (mind you, they have an enormous density of airports in Japan so this was not too surprising). Efforts are currently ongoing to retrieve the people marooned, and to reestablish supply-lines of food, water and electricity. Focusing on the reactors, during the earthquake all reactors in affected areas started emergency shutdown procedures, stopping the main fission reaction right away and started cooling down of the reactors. Given that the reactors are of the second generation type, active cooling is required (new generation 3 reactors do not need circulation pumps but can cool by convection instead). Several power plants shut down properly after this event (albeit with some minor issues in some). However, at the Fukushima Daiichi plant (consisting of 6 reactors, three of which were already shut down at the time of the quake), the tsunami which arrived minutes later wiped out the power generators and the external power supply lines. This left only the batteries intact. With the batteries, 8 hours of cooling was achieved, which was not sufficient time to reestablish electrical supply. After failure of the battery power, the reactor temperatures of the previously active reactors started increasing due to residual activity in the fuel rods. At a much slower pace, the temperatures in the fuel storage pools also increased. After some time, efforts started to cool down the reactors and to release the formed steam (as the pressures in the reactors increased upon steam formation). Hydrogen formed by oxidation of the zirconium fuel-rod cladding with steam was released as well, causing explosions in some reactor buildings. After several days of hard work by the plant engineers, the situation is stabilizing with the arrival of power and cooling water from fire engines. A good summary per reactor is provided on a daily basis by the Kyodo news agency (f. ex. Sunday evening, 20th of March). Due to the release of steam and the cooling efforts, some radioactivity in the form of light isotopes (as of iodine and cesium) was released into the surroundings and found in f.ex. foodstuffs. For more detail, check out the Wikipedia page. The foreign media action during this entire situation was abominable. The Japanese agencies mostly provided “matter-of-fact” updates and regurgitations of press releases from the government and the power organizations (which may also not be perfect, as they have been accused of putting a too positive spin on the news as well). Good sources of Japanese news for English readers are Kyodo, NHK, and to a lesser degree, Asahi Shimbun (updating quite infrequently with old information). Many foreign news sites reported bad and/or sensationalist excerpts instead, fanning the flames of fear and causing people half a globe away to start buying potassium iodine pills and closing down power plants. A compilation of erroneous post-quake reporting can be found here. Opinion pieces on the media behaviour can also be found here, here, here and here, and more generally about their response to the earthquake and tsunami here. Now, sensibility is returning to some of the stories run by the media. This may be due to the limited public attention span, lack of exciting news and sensational quotes, the skew of news reporting skewing in another direction, or the journalists becoming more well-read on the topic, but I think it may also have to do with the emerging availability of good graphics. There have now been several good graphs to show how the different levels of radiation stack up, f.ex. those here and here. The NY Times also has a good graph showing the progression of detected radiation over time. The BBC has a limited graphical explanation of the course of events. Cooling down of the spent fuel storage pools is shown here, albeit with a superfluous dimension thrown in for no good reason. However, graphs have also been used to instill fear, such as the ones here, here and here (although I cannot understand the graphs in this last one). With these graphs, some perspective can be attained about the scope of the events, but one must be wary of sensationalist graphics popping up as well. So what can be learned from this? Well, one message is that in such an event, generating graphics about the situation has to be one of the top priorities to all who can. Besides these, voicing a moderate opinion in the face of the extremists has to be considered, as the voice of reason is rarely heard. Now most of us do not have a degree in nuclear physics, reactor design or suchlike, but we can nevertheless offer an educated view to the situation, if we take the time to read the reports and distill the facts from them. While this is risky (Carl Sagan is mildly criticized for speaking outside of his expertise by Ben Goldacre, when he warned of nuclear winters, for example), it is also one of the only ways of educating the general public about science in general. […]


Update on Japan, earthquake, tsunami, J-PARC, reactors and news.

2011/03/15 // 0 Comments

A quick post about the situation in Japan. I did not feel anything of the earthquake (I was in Hyogo prefecture at the time), although one of my colleagues did feel something close to Osaka. SPring-8 is equally unaffected. The tsunami did not come anywhere near. Overall, the Japanese colleagues seem to be taking it coolly, with most of the complaints about the troubles with the public transport system. J-PARC was apparently damaged by the earthquake, but was not affected (fortunately) by the tsunami. More updates on that can be found on the J-PARC twitter page: The (foreign) media is causing needless panic on the nuclear situation. A layman writeup of the lack of danger can be found here: OP-ed And a more technical description and updates on that situation can be found here: MIT While also affected by the media hubbub on the reactors, information on the actual disaster area and its deaths is most well reported (in my opinion) by NHK: NHK international news –update– A colleague sent me a link to the IAEA page which also contains continuous reactor status updates: here Finally, if you are willing to help, consider donating to a reputed organization (i.e. red cross, UN organisations or doctors without borders) rather than one of those one-time relief funds (as some of the “save katrina” and “Aceh”-funds turned out to be fake).


Gamma rays from synchrotrons, an interview with dr. Daté

2011/02/18 // 0 Comments

There is something quite “evil genius” about shooting an electron beam with a laser, especially for non-physicists like me. That this causes gamma rays to emerge (back towards the laser) is perhaps even more interesting. Allow me to elaborate in slightly more scientific terms.