Michele Kearney's Nuclear Wire

Major Energy and Environmental News and Commentary affecting the Nuclear Industry.

Monday, March 14, 2011

Possible damage at Fukushima Daiichi 2 15 March 2011


Possible damage at Fukushima Daiichi 2 15 March 2011


FIRST PUBLISHED 1.22 GMT

Loud noises were heard at Fukushima Daiichi 2 at 6.10am this morning. A major component beneath the reactor may be damaged.

Confirmation of loud sounds this morning came from the Nuclear and Industrial Safety Agency (NISA). It noted that "the suppression chamber may be damaged." It is not clear that the sounds were explosions.

Also known as the torus, this large doughnut-shaped structure sits in the centre of the reactor building at a lower level than the reactor. It contains a very large body of water to which steam can be directed in emergency situations. The steam then condenses and reduces pressure in the reactor system.

The torus is not within the primary containment structure surrounding the reactor vessel, but within the secondary containment structure of the reactor building itself.

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