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. |
