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Cold shutdowns at Fukushima Daini

Located in: Regulation and Safety

14 March 2011

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.

Second explosion rocks Fukushima Daiichi

Located in: Regulation and Safety

14 March 2011

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.

Contamination checks on evacuated residents

Located in: Regulation and Safety

13 March 2011

Potential contamination of the public is being studied by Japanese authorities as over 170,000 residents are evacuated from within 20 kilometres of Fukushima Daini and Daiichi nuclear power plants. Nine people's results have shown some degree of contamination.

Efforts to manage Fukushima Daiichi 3

Located in: Regulation and Safety

13 March 2011

Operations to relieve pressure in the containment of Fukushima Daiichi 3 have taken place after the failure of a core coolant system. Seawater is being injected to make certain of core cooling. Malfunctions have hampered efforts but there are strong indications of stability.

Battle to stabilise earthquake reactors

Located in: Regulation and Safety

12 March 2011

BWR cutaway

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

Massive earthquake hits Japan

Located in: Regulation and Safety

11 March 2011

Nuclear reactors shut down during today's massive earthquake in Japan. Work to stabilise three reactors at Fukushima Daiichi continues into the morning.

 

Reactors continue through earthquake

Located in: Industry Talk

09 March 2011

Nuclear power plants were barely affected by the Sanriku offshore earthquake that rocked Japan on 9 March at 11.45am. The earthquake measured 7.3 on the Richter scale and originated 160 kilometres offshore, some 8 kilometres underground. A tsunami warning was issued but in the end waves reached only 60cm high. Nuclear power plants on the Pacific coast that felt the quake include Onagawa, Higashidori and Fukushima Daini and Fukushima Daiichi. All the reactors at those plants operated as normal through the earthquake apart from two units that were already shut down for inspection. Diesel generators started automatically at Onagawa 2 on detection of the earthquake. Inspections at all the power plants found nothing unusual and operation continues.

Utilities apply for longer operation

Located in: Corporate

17 January 2011

Nuclear power companies in Japan are working to extend operational periods between mandatory inspections. Tepco and Tohoku are both applying to operate for 16 months between official checks.

Third Japanese reactor to load MOX

Located in: Industry Talk

10 August 2010

Tokyo Electric Power Company's (Tepco's) Fukushima I unit 3 is set to become the third Japanese nuclear reactor to load mixed oxide (MOX) fuel after receiving approval from the governor of Fukushima Prefecture, Yukei Sato. The unit follows Kyushu Electric's Genkai 3, which started using MOX fuel in November 2009, and Shikoku's Ikata 3, which was loaded with some MOX fuel in March 2010. According to the Denki Shimbun, the 760 MWe boiling water reactor will be loaded with MOX fuel by 21 August and the unit will restart in late September. Japan's Nuclear and Industrial Safety Agency has so far approved the use of MOX fuel in ten reactors, but utilities must also secure approval from prefectural governments before they can go ahead and use the fuel, which contains plutonium recovered from spent nuclear fuel.

 

Reactors operated normally through quake

Located in: Regulation and Safety

14 June 2008

Fukushima IUPDATED Four nuclear power plants, including 14 reactors, operated normally during the 7.2 magnitude earthquake in the prefecture of Iwate, northern Japan. A small amount of water was shaken pools at two of the reactors and a waste store.


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