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Author Topic: Massive earthquake in Japan...  (Read 103649 times)

Offline PaulMM (Overscan)

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Re: Massive earthquake in Japan...
« Reply #90 on: March 17, 2011, 12:21:25 am »
Topic cleaned up.
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Offline blackkite

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Re: Massive earthquake in Japan...
« Reply #91 on: March 17, 2011, 03:06:10 am »
Hi! No.1 Fukushima nuclear power station #5 reactor water temperature reach 63 degree centigrade, #6 reactor water temperature reach 60 degree centigrade. TEPCO preparing to receive external electricity to recover cooling function. Also temporary cooling system is preparing now.  
High pressure water truck already reached near No.1 Fukushima site preparing discharge water to #3 and #4 reactor spent fuel storage pool. (this morning 3/17 2011)
Today Japanese Self Defense Force's two CH-47(which has lead plate floor) dropped 7.5ton water 4 times to #3 reactor's spent fuel storage pool.NISA and TEPCO evaluating the effect of water bombing. High pressure water truck is not effective because reach is too short for #4 reactor spent fuel storage pool then discharged water to the #3 reactor spent fuel storage pool. CH-47 crews irradiation level was under 100mSv/h while radioactivity of mission area was 87.7mSv/h. The crew observed water in the spent fuel storage pool of #4 reactor.(TV news 19:20 17/3/2011)
Japanese self defense force's water truck #1(from 19:30) and #2(from 19:45) begin discharge water to the #3 reactor spent fuel storage pool.
Total 5 water truck discharged to #3 reactor about 1 hour. NISA and TEPCO evaluating the effect.(TV news 19:55 17/3/2011)
« Last Edit: March 17, 2011, 07:07:52 am by blackkite »

Offline Archibald

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Re: Massive earthquake in Japan...
« Reply #92 on: March 17, 2011, 04:04:30 am »
Quote
TEPCO preparing to receive external electricity to recover cooling function.

This might be a huge relief - or are all the "build in" pumps damaged beyond any usefulness ?
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Online starviking

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Re: Massive earthquake in Japan...
« Reply #93 on: March 17, 2011, 04:16:29 am »
Quote
TEPCO preparing to receive external electricity to recover cooling function.

This might be a huge relief - or are all the "build in" pumps damaged beyond any usefulness ?

We'll just have to see. Still, restoring a high-voltage supply will be useful even if the pumps are useless.

Offline blackkite

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Re: Massive earthquake in Japan...
« Reply #94 on: March 17, 2011, 07:51:39 am »
Hi! Fukushima nuclear power station Boilimg water reactor(BWR) system.
You can see spent fuel storage pool in second picture.(right side of the reactor top.)
TEPCO said that electricity will recover near future they hope.(0:34 18/3/2011)
They will work all night to rcover electricity under cold, snowy, dark  and high radioactive environment.
JSDF will do very dangerous water discharge from helicopter and water truck tomorrow.
TEPCO is still cooling three reactor vessels. (#1,#2 and #3)
« Last Edit: March 17, 2011, 08:45:49 am by blackkite »

Offline blackkite

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Re: Massive earthquake in Japan...
« Reply #95 on: March 17, 2011, 03:16:38 pm »
Electricity cable and temporary power transformer already reached No.1 Fukushima site.
TEPCO will tried to connect cable to the #2 reactor building this evening.
It will be hard job. #2 reactor building wall already opened.
JSDF's four CH-47 are waiting for order this morning. Also water trucks.(NHK TV news Japan Time 7:11 18/3/2011)

Sorry I made a mistake.Decay heat level now is 3 to 5% compered with operating condition.(not 0.3% to 0.5%)
Tonight Tokyo university professor said It's under 0.5%. Hummm I hope so.(NHK TV news)

Radioactivity level of No.1 Fukushima site are decreasing now. TEPCO is also trying to recover #5 and #6 reactor cooling function.
(RHR system(Residual heat removal system): Which cool Primary containment vessel suppression pool water by sea water heat exchanger.)
Water discharge(50 ton) to the #3 reactor spent fuel storage pool was performed same as yesterday.(Internet site 20:10 18/3/2011)
We are facing 6 reactors problem!!!!!(TMI is one reactor's accident)
TSUNAMI was too hard compared with our expectation. Please take note that it was the historic massive TSUNAMI.
There are no perfect safety in our world.
« Last Edit: March 18, 2011, 04:31:40 pm by blackkite »

Offline Nils_D

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Re: Massive earthquake in Japan...
« Reply #96 on: March 18, 2011, 09:41:48 am »
How has the situation become now? Is it stabilizing?

Offline TinWing

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Re: Massive earthquake in Japan...
« Reply #97 on: March 18, 2011, 01:21:39 pm »
How has the situation become now? Is it stabilizing?

Here is an aggregator website where the links are frequently updated:

http://www.drudgereport.com/

As you can see, the situation depends on a number of factors, such as wind direction.



 

Offline Firefly 2

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Re: Massive earthquake in Japan...
« Reply #98 on: March 18, 2011, 01:39:16 pm »
I bow my head in respect for the "Fukushima 50". Such devotion is seldom seen.
http://abcnews.go.com/International/fukushima-50-line-defense-japanese-nuclear-complex/story?id=13147746

Offline Michel Van

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Re: Massive earthquake in Japan...
« Reply #99 on: March 18, 2011, 03:04:38 pm »
close view on the reactors


NHK TV Japan: Inside Fukushima reactor

I love Strange Technology

Offline blackkite

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Re: Massive earthquake in Japan...
« Reply #100 on: March 18, 2011, 05:39:36 pm »
NISA said that radioactivity level decrease from 3.611mSv/h(AM 8:00 3/18) to 3.181mSv/h(north side of No.1 Fukushima office building) by water discharge(60 ton) to #3 reactor performed from AM 0:30 to AM 1:00 3/19/2011.
TEPCO said that they will finish to connect electricity cable to #1 and #4 reactor till the end of 3/19.(From internet 9:37 19/3)

TEPCO announced that fuel heat generation of spent fuel storage pool are as follows.
#1 reactor building:      60,000Kcal/h
#2 reactor building:    400,000Kcal/h
#3 reactor building:    200,000Kcal/h
#4 reactor building: 2,000,000Kcal/h
#4 reactor building is very large. If #4 pool will dry,fuel will begin to melt,radioactivity discharge to environment will begin from the fuel.

Water discharge from water truck to #3 and #4 reactor building will begin this afternoon,after finish to connect cable to the reactor building.White steam appeared from #2,#3 and #4 reactor building.(12:30)(NHK news 10:00 19/3/2011)  
« Last Edit: March 18, 2011, 06:31:01 pm by blackkite »

Offline blackkite

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Re: Massive earthquake in Japan...
« Reply #101 on: March 18, 2011, 09:10:42 pm »
Tokyo Fire Department plan 7 hour continuous sea water discharge to #3 reactor building from 13:30 19/3/2011.
Also Japanese Self Defence Force(JSDF) plan sea water discharge to #4 reactor building.
One of emergency diesel generator of #6 reactor recovered and recovered the function to charge water to the spent fuel storage pool in #5 and #6 reactor building. TEPCO is trying to connect electric cables to all reactor buildings now. (NHK news 13:00 19/3/2011)
  
« Last Edit: March 18, 2011, 09:19:55 pm by blackkite »

Offline blackkite

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Re: Massive earthquake in Japan...
« Reply #102 on: March 19, 2011, 02:58:15 am »
Minister of defence Kitazawa said that #1,#2,#3 and #4 reactor's temperature is under 100 degree centigrade according to CH-47's sensor.
(Sankei Newspaper 16:00 3/19/2011)
Electric cables are already connected to #1 and #2 reactor building TEPCO said.(NHK news 21:05 19/3/2011)
« Last Edit: March 19, 2011, 05:06:49 am by blackkite »

Offline mz

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Re: Massive earthquake in Japan...
« Reply #103 on: March 19, 2011, 02:03:33 pm »
NISA said that radioactivity level decrease from 3.611mSv/h(AM 8:00 3/18) to 3.181mSv/h(north side of No.1 Fukushima office building) by water discharge(60 ton) to #3 reactor performed from AM 0:30 to AM 1:00 3/19/2011.
TEPCO said that they will finish to connect electricity cable to #1 and #4 reactor till the end of 3/19.(From internet 9:37 19/3)

TEPCO announced that fuel heat generation of spent fuel storage pool are as follows.
#1 reactor building:      60,000Kcal/h
#2 reactor building:    400,000Kcal/h
#3 reactor building:    200,000Kcal/h
#4 reactor building: 2,000,000Kcal/h
#4 reactor building is very large. If #4 pool will dry,fuel will begin to melt,radioactivity discharge to environment will begin from the fuel.

Water discharge from water truck to #3 and #4 reactor building will begin this afternoon,after finish to connect cable to the reactor building.White steam appeared from #2,#3 and #4 reactor building.(12:30)(NHK news 10:00 19/3/2011)  

EDIT: whoops had a 60x error in my post, corrected my post accordingly, thanks for mentioning bipa...

60 000 kcal / h is 70 kilowatts. As water takes 2 MJ/kg to boil, that's equivalent to boiling 2 kg of water per minute at reactor #1. One could fill that number by pouring a ten liter hand bucket every five minutes.

Reactor #2: 14 kg per minute , #3: 7 kg per minute, #4: 70 kg per minute. That's a tiny power even at the largest, #4 reactor, roughly 2 MW. Cooling should not be super hard anymore.
« Last Edit: March 19, 2011, 04:22:58 pm by mz »

Offline bipa

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Re: Massive earthquake in Japan...
« Reply #104 on: March 19, 2011, 03:56:11 pm »
No 60,000 kcal/h is about 70 kW.