Dossier "IMPORTANT"!

Infos JAPON séisme du 11 mars 2011
Communiqués GSIEN
29 mai
Panne de refroidissement sur le réacteur 5 de Fukushima

TOKYO, 29 mai (Reuters) - Le système de refroidissement du réacteur et de la piscine du combustible a cessé de fonctionner dans la tranche n°5 de la centrale nucléaire de Fuskushima-Daiichi, au Japon, a annoncé dimanche l'exploitant du site, la compagnie Tokyo Electric Power (Tepco).
     Cette dernière espère relancer ce système de refroidissement dans un délai de quelques heures, a dit un responsable de Tepco, selon lequel il ne faut pas craindre une hausse rapide de la température dans le réacteur ni dans la piscine contenant le combustible usagé.
     Les réacteurs 1 à 4 de la centrale de Fukushima-Daiichi ont été fortement endommagés par le séisme et le tsunami survenus le 11 mars.
     Les dégâts sur les réacteurs 5 et 6 ont été moins importants.
suite:
NHK, Sunday, May 29, 2011 13:08 +0900 (JST)
     The operator of the damaged Fukushima Daiichi nuclear power plant says temperatures in the Number 5 reactor and its spent fuel storage pool have risen due to pump failure. The reactor has been in a state of cold shutdown.
     Tokyo Electric Power Company says it found at 9 PM on Saturday that a pump bringing seawater to cooling equipment for the reactor and pool had stopped working.
     TEPCO says temperatures have been rising since then.
     The water temperature in the reactor rose by about 24 degrees Celsius to 92.2 degrees at 11 AM on Sunday. The temperature in the fuel storage pool increased to 45.7 degrees from 41 degrees.
     On Sunday morning, TEPCO installed a new pump that started operating shortly after noon.
     The company suspects failure in the pump motor caused the malfunction. It is now working to detect the cause of the failure while monitoring temperatures in the reactor and pool.
Cooling systems restored for fuel pools
NHK, Sunday, May 29, 2011 05:08 +0900 (JST)
     The operator of the crippled Fukushima Daiichi nuclear power plant has now successfully restored cooling systems to the spent fuel pools of reactors 1, 2, 3 and 4.
     On Saturday, TEPCO injected about 5 tons of water to the spent fuel pool of reactor 1 on a test basis. It was the last system to be restored.
     The power company is also working to install new water-circulating systems that will more efficiently cool all the fuel pools. The new systems for reactors 1 through 4 are scheduled for completion by July.