Tag "water injection"

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Core removing struggle

Second core damage and major radiation discharge occurred in reactor1&3 from 3/20 to 3/23/2011

  On 3/6/2013, Tepco released their video record of their TV meeting from 3/16 to 4/11/2011. According to this record, 90% of the coolant water didn’t reach reactor1 in March

Core removing struggle

More than half of the injected water didn’t reach reactor3 to cause meltdown in 311

  According to NHK’s original research, only 45% of the water injected by fire-engine reached reactor3, and reactor3 ended up having meltdown. NHK simulated the situation with experts to conclude

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Tepco to start the reliability improvement work for feed water systems of reactor2 and 3

From 2/20/2013, Tepco will start the reliability improvement work for feed water systems of reactor2 and 3.       http://www.tepco.co.jp/en/nu/fukushima-np/handouts/2013/images/handouts_130219_01-e.pdf     Iori Mochizuki _____ Français : Tepco va

Contaminated water crisis Spent Fuel Pools

Coolant water leaked 3 times only within 1 week due to the bad installation and freezing “Same as last year”

On 1/19/2013, Tepco employee found a water leakage at the water treatment building. Due to this accident, they got to have to feed water to skimmer surge tank of reactor1

Core removing struggle Plant hazard

Reactor2 temperature decreasing since the volume of injection water was increased

Two of the thermometers of reactor2 have been showing the increase of temperature since last December. On 1/7/2013, Tepco labelled the 2 thermometers as “broken”. However, they kept on indicating

Core removing struggle

Reactor5 gets heated as water injection stops

According to Tepco’s plant parameter, water temperature of reactor5 goes up when the reactor water level decreases. Tepco has been having problems with the water injection pumps, which pieces of

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Heat removal seawater flow rate decreased in reactor5 too

Reactor injecting water amounts are observed decreasing in reactor1 ~ 3. [Link] On 10/1/2012, Tepco announced the flow rate of residual removal seawater decreased in reactor5 as well.   1号機から3号機の原子炉への注水量が低下している事が確認されました。

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Injecting water to reactor1 ~ 3 decreased again

The coolant system of Fukushima plant is getting deteriorated. Tepco has been struggling to control water injecting system since 8/30/2012. (cf. Tepco struggling to control the coolant system, “Adjusted the

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Tepco struggling to control the coolant system, “Adjusted the valves 7 times for 2 days”

  On 8/30/2012, the injection water for reactor 1~3 decreased all of a sudden. (cf. Sudden decrease of injecting water for reactor1~3, cause not known) Tepco announced they fixed it

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Sudden decrease of injecting water for reactor1~3, cause not known

  Fukushima is not settled down at all. All they could do is just to keep giving water but because of the improvising construction, it’s becoming difficult to sustain the