Fukushima Daiichi II.A. The Event The earthquake occurred at 2:46 p.m. on Friday, March 11, 2011. All Japanese NPPs have seismic instrumentation systems that shut down the reactors when a significant earthquake occurs, and when the earthquake occurred, these systems functioned normally for all units. II.A.1. Since Unit 1 was under periodic inspection at the time of the earthquake, all the fuel in the reactor core had already been taken out and placed into the SFP. II.A.2. Units 1 and 3 were at rated thermal power operation at the time of the earthquake, and Unit 2 was under reactor start-up operation. Unit 1 tripped at 2:46 p.m. because of high seismic acceleration, and both EDGs started automatically. Since Unit 2 was in start-up operation, it shifted promptly to cold shutdown because the reactor had shut down automatically at 2:46 p.m. as a result of high seismic acceleration. Unit 3 tripped at 2:46 p.m. because of high seismic acceleration. II.A.3. II.A.4. II.A.5. II.B. II.B.1. II.B.2. II.B.3. II.C.
Accueil - IRSN - Institut de Radioprotection et de Sûreté Nucléaire Forte réplique près de la centrale d'Onagawa (7.1 Mw) suite au séisme du 11 mars 2011 Jeudi 7 avril 2011 à 23h32 heure locale (14h32 TU), un séisme de magnitude 7,1 s’est produit à quelques kilomètres de la côte Est de l’île d’Honshu au Japon, à environ 20 km de la centrale nucléaire d’Onagawa, et à 70 km à l’est de la ville de Sendaï. L’IRSN publie une note d’information sur les caractéristiques de ce séisme. L’Alliance Européenne en Radioécologie : une initiative pour une meilleure intégration des recherches menées en radioécologie en Europe Lors de la Conférence Internationale de Radioécologie et de Radioactivité Environnementale qui ouvre le 20 juin 2011 à Hamilton (Canada), huit organismes de recherche européens présentent une initiative pour intégrer les travaux de recherche en radioécologie conduits en Europe. Position de l’IRSN sur les critiques de la CRIIRAD relatives à la surveillance environnementale en France après l’accident de Fukushima
CISS Centre international de sécurité sismique International Seismic Safety Centre (ISSC) The seismic safety of nuclear installations has received substantial attention in the IAEA within the framework of its statutory functions for establishing IAEA Safety Standards and assisting Member States in their application. Over the past years, attention has been renewed worldwide due to the occurrence of strong earthquakes, some of which affected existing nuclear installations beyond their original design levels. In 2008, the IAEA launched the International Seismic Safety Centre (ISSC) to address in an integrated manner the safety of nuclear installations in respect of all external hazards, including site selection and evaluation aspects for nuclear installations, the . The role of the ISSC is to assist IAEA Member States in external hazard assessment, and in aspects of site selection and site evaluation. The applicable IAEA Safety Standards form the basis of these programmes and services. Topical technical projects External hazards
Links Relevant to “Australian Obligated Plutonium” in Japan An email to Mr Kevin Rudd MP – “Australian Obligated Plutonium” By nuclearhistory Which Japanese reactors are running Aust obligated plutonium Mr Rudd? Wednesday, 16 March, 2011 7:40 AM ToKevin.Rudd.MP@aph.gov.au Is there MOx in the spent fuel rod pools in radiation affected areas of Japan? What is the body burden limit for spent fuel ? Thanks in anticipation of you being open and transparent. Paul Langley No reply to email has been sent to me. 1998, the year before the shipment: 1 June 1998 AUSTRALIA-EURATOM NUCLEAR SAFEGUARDS: PLUTONIUM RETRANSFERS The new Agreement will represent a further refinement of Australia’s advance consent to plutonium retransfers under the 1981 Australia-Euratom Agreement concerning Transfers of Nuclear Material. For further information: Like this: Like Loading...
Simulations de la dispersion atmosphérique du panache radioactif formé par les rejets de la centrale nucléaire de Fukushima Daiichi, entre le 12 mars et le 20 mars 2011 A compter du 12 mars 2011, le panache radioactif résultant des rejets des réacteurs nucléaires accidentés de la centrale de Fukushima s'est déplacé, tout en se diluant, dans les courants atmosphériques de l’hémisphère nord. L’IRSN a évalué, avec l’aide de Météo France, quel pourrait être l’impact à très grande distance des rejets radioactifs dans l’air provenant de la centrale nucléaire accidentée de Fukushima, depuis le 12 mars 2011. Ces évaluations ont été réalisées à partir de l’estimation des rejets, faite par l’IRSN grâce à l’analyse des données techniques disponibles sur les installations accidentées et dans l’environnement (plus d'informations). Modélisations de la dispersion des rejets radioactifs dans l’atmosphère à l’échelle mondiale Les différentes modélisations réalisées ont fourni une prévision au niveau mondial des concentrations de césium 137 (élément radioactif rejeté par la centrale nucléaire de Fukushima) attendues dans l’air au niveau du sol.
Japon : Nucléaire, la filière du silence Au sommaire : La prison hors les murs. Du bracelet électronique au travail d'intérêt général, gros plan sur les aménagements de peine dont bénéficient certains condamnés. - Turquie, un modèle à bout de souffle. Caroline Fourest et Fiammetta Venner enquêtent auprès des «gagnants» et les «perdants» de l'ère Erdogan ? Fukushima Nuclear Accident Update Log Updates of 15 March 2011 Staff Report → Chronology of Updates:2 June | 12-18 May | 4-11 May | 5 May | 3 May | 2 May | 28 April | 27 April | 26 April | 21 April | 20 April | 19 April | 18 April | 15 April | 14 April | 13 April | 12 April | 11 April | 10 April | 9 April | 8 April | 7 April | 6 April | 5 April | 4 April | 3 April | 2 April | 1 April | 31 March | 30 March | 29 March | 28 March | 27 March | 26 March | 25 March | 24 March | 23 March | 22 March | 21 March | 20 March | 19 March | 18 March | 17 March | 16 March | 15 March | 14 March | 13 March | 12 March | 11 March | Full Update Fukushima Nuclear Accident Update (15 March 2011, 22:30 UTC) Japanese authorities have informed the IAEA that the evacuation of the population from the 20-kilometre zone around Fukushima Daiichi has been successfully completed. The Japanese authorities have also advised that people within a 30-km radius to take cover indoors. Fukushima Nuclear Accident Update (15 March 2011, 20:35 UTC) Background on Radiation
Journal du peuple » » Carte du nuage nucléaire et radioactif de Fukushima au Japon. Simulation des déplacements à venir. Article de admin le 18 mars 2011 | 0 commentaire Carte du nuage radioactif à 5000m cliquez dessus pour visionner l’animation. Carte du déplacement du nuage radioactif à 2500m. Cliquez dessus pour visionner l’animation. Carte des rejets radioactif au niveau du sol. Les cartes ont été publié par les scientifiques de l’université de Cologne, Allemagne. More on the Reactor 4 fires of 15 March 2011 Draft. Im working on a Dell mini 10v and cant find my glasses. As readers who are prepared to wade through this blog know, I am trying to put together the facts relating to the fires which occurred on 15 March 2011 at reactor 4. (organization and ease of expression under pressure are not my strong points, and I remain overwhelmed with information, and still lack a clear timeline of events in March – particularly in relation to the events at Reactor 4). I will be putting the posts related to the fires together. I will do this once I have a sufficient number of sources with which to claim a rational and authoritative basis for the view that there was or was not a fire in the R4 spent fuel pool. I have been watching the relevant recordings of Australian TV reports of the time period, and all that I captured at the time is, on watching now, very murky and unclear. A reader, Anon, has contributed following information : Aaron also writes: Well, they weren’t. And so the worse had happened.
The Great Beyond: Fukushima Crisis: Latest maps of spread of radiation plumes in Asia-Pacific Wind directions in Japan are currently blowing radiation from the troubled Fukushima nuclear power plant eastwards out to the Pacific Ocean (see Figure 1), but a shift in directions Sunday risks sending the radiation plume towards Tokyo (see Figure 2). These models have just been published in a bulletin by Austria’s weather service, the Central Institute for Meteorology and Geodynamics in Vienna. On the colour scale, red represents 100 millisieverts per hour (100 mSv/hr), and purple a maximum of 100 nanosieverts per hour (.0001 mSv/hr). For an explanation of the units see “” exposure, beyond the numbers". In terms of dose, an exposure of 100mSv is enough to slightly increase the chances of developing cancer later in life; a dose of 100 nanosieverts is neglegible. Figure 1: Plume as of today, and tomorrow. <IMG SRC=“
Concerns over re-criticality at Fukushima Diiachi Out of the fog of mis information issued by nuclear authorities, a hazy awareness of the danger of re criticality of displaced fuel lingers. What is the actual disposition of the fuel ? Noone knows. How often has recriticality occurred amid the destroyed, displaced and molten fuel ? Wikipedia reports the situation reguarding reactor Number 2 as follows: Concerns over re-criticality On 1 November 2011 TEPCO said that xenon-133 and xenon-135 was detected in gas-samples taken from the containment vessel of reactor 2, in a concentration of 6 to 10 (or more) parts per million becquerels per cubic centimeter. On 3 November 2011 TEPCO said that the tiny amounts of xenon-135 detected in the reactor’s containment vessel atmosphere came from spontaneous nuclear fission with curium-242 and curium-244, substances that were present in the nuclear fuel. The detection of xenon on the afternoon of 1 November by TEPCO was reported to NISA in the night. The plant continues to present an on going danger.