Tokyo, le jeudi 21 juin 2012 - Entre le 17 et le 19 mars 2011,
l’armée de l’air américaine a recueilli des informations très
précieuses sur la radioactivité émanant de la centrale de Fukushima
très gravement endommagée par le séisme et le tsunami survenus le
12 mars. Elle a notamment pu observer que les personnes résidant
dans une zone située à 25 kilomètres au nord ouest de
l’installation, avaient été exposées à l’équivalent du taux maximum
admissible annuel de radioactivité en huit heures. Cette
information, d’autant plus importante que certaines personnes
déplacées s’orientaient vers la zone concernée a été transmise à
l’Agence de Sécurité nucléaire et industrielle du Japon et au
ministère des sciences et des technologies mais n’a pas été relayée
par ces services au Premier ministre. « Il est extrêmement
regrettable que cette information n’ait pas été partagée ou
utilisée correctement au sein du gouvernement et je n’ai pas de
mots pour m’excuser, surtout auprès des victimes de la
catastrophe » vient de reconnaître le Ministre de l’Industrie,
Yukio Edano, porte-parole du gouvernement pendant la crise. Cette
dissimulation s’ajoute à une série de dysfonctionnements constatés
ces derniers mois révélant de nombreuses failles dans le dispositif
de gestion de la crise par les autorités japonaises, failles qui
aujourd’hui pèsent lourdement sur la confiance des Japonais.
M.P.
Japan's nuclear safety agency is set to ask the operators of 4 nuclear power plants to re-examine the effects of seismic activities that it says became more active after the March 2011 earthquake in northern Japan.
The Nuclear and Industrial Safety Agency will request the reassessment of quake resistance for the Tomari plant in Hokkaido, Tsuruga and Monju plants in Fukui Prefecture and the Shimane plant in Shimane.
It says the risk has increased of active faults more than 5 kilometers away from each other shifting simultaneously and causing a greater earthquake than predicted.
Hokkaido Electric Power Company says even if the 2 active faults on the sea and the land move at the same time, the assumed temblor in part of the Tomari facility will be a little larger than that previously calculated. It says quake resistance can be secured as important buildings are little affected by the quake.
But experts at the agency pointed out at a meeting that the tremor will be further intensified if the 2 active faults shift simultaneously.
They asked the company to reassess quake resistance based on the new assumption.
The company says it will respond appropriately in line with the experts' views, but it insisted that there will be no problem with the ability of key equipment to safeguard the nuclear plant.
Results of the reassessment could force a revision of quake resistance standards at the plants.
They could also affect the outcome of the stress tests required for restarting the idled plants.
The power companies say they will submit reports on their reassessments.
The Nuclear and Industrial Safety Agency will request the reassessment of quake resistance for the Tomari plant in Hokkaido, Tsuruga and Monju plants in Fukui Prefecture and the Shimane plant in Shimane.
It says the risk has increased of active faults more than 5 kilometers away from each other shifting simultaneously and causing a greater earthquake than predicted.
Hokkaido Electric Power Company says even if the 2 active faults on the sea and the land move at the same time, the assumed temblor in part of the Tomari facility will be a little larger than that previously calculated. It says quake resistance can be secured as important buildings are little affected by the quake.
But experts at the agency pointed out at a meeting that the tremor will be further intensified if the 2 active faults shift simultaneously.
They asked the company to reassess quake resistance based on the new assumption.
The company says it will respond appropriately in line with the experts' views, but it insisted that there will be no problem with the ability of key equipment to safeguard the nuclear plant.
Results of the reassessment could force a revision of quake resistance standards at the plants.
They could also affect the outcome of the stress tests required for restarting the idled plants.
The power companies say they will submit reports on their reassessments.
Tuesday, April 24, 2012 06:57 +0900 (JST)





