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All Fukushima Daini units in cold shutdown
All Fukushima Daini units in cold shutdown
All four units at the Fukushima Daini nuclear power plant have now achieved cold shutdown - where coolant water is at less than 100潞C - with full operation of cooling systems, Tepco reported. All the reactors shut down automatically during last week鈥檚 earthquake and have remained safe. While unit 3鈥檚 shutdown went as expected, damage to the emergency core cooling systems of units 1, 2 and 4 led to the announcement of emergency status. These three reactors were prepared for potential pressure release, but this was never required. Unit 1 announced cold shutdown at 1.24 am on 14 March and unit 2 followed at 3.52 am. Tepco has now announced that unit 4 achieved cold shutdown at 7.15 pm on 15 March. Water levels are now stable in all four reactors and offsite power is available, the company said.
Other News · Tuesday, 15 March 2011
Second explosion rocks Fukushima Daiichi
Second explosion rocks Fukushima Daiichi
Another hydrogen explosion has rocked the Fukushima Daiichi nuclear power plant, this time at the third reactor unit. Initial analysis is that the containment structure remains intact.
Regulation & Safety · Monday, 14 March 2011
Cold shutdowns at Fukushima Daini
Cold shutdowns at Fukushima Daini
Two more reactors at Fukushima Daini have now achieved cold shutdown with full operation of cooling systems. Engineers are working for the same at the last unit.
Regulation & Safety · Monday, 14 March 2011
Battle to stabilise earthquake reactors
Battle to stabilise earthquake reactors

BWR cutaway

Attention remains focused on the听Fukushima Daiichi and Daini nuclear power plants as Japan struggles to cope in the aftermath of its worst earthquake in recorded history.听A dramatic explosion did not damage containment and sea water injection continues through the night.

Regulation & Safety · Saturday, 12 March 2011
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