Japan Earthquake

Found one. Theres still aftershocks happening in pacific rim. 95 killed one a 6 year old in a store when roof fell. Airports are reopening. power cuts in north east. No radiation leak currently no evacuation.

from NHK Radio Japan

 

:\ tbh, didn't think that this thing would be a problem. Watched the news before and it sounded like they had everything under control, much changed in the past 5 hours or so?

 

hey toon army whyd ye wreck japan for ? on a serious note it is terrible but us here in britain and ireland are under threat of tsunami from a giant rock in the canaries which scientists say will definatley collapse into the sea at some point this century wreaking havoc here and all of eastern america

 

ahh itll only be the cotswolds Swindon could do with a cleanup

 

Coastal areas of Chile and surrounding Island's are being evacuated ahead of the Tsunami.

 

Jesus, just read up on it! sounds like it would wipe me out...!

 

Apparently West coast of usa is ok. Must just be a precaution in Chile

 

Chile will take every precaution after last time...

 

2310: More from the Tokyo Electric Power Company: It says the ability to control pressure in some of the reactors at Fukushima-Daini has been lost. Pressure is stable inside the reactors, but rising in the containment vessels, a company spokesman says.

It's getting worse...

 

Theyre mainly worried about water contamination incase particles enter it

 

Some people on facebook posting groups making jokes about it, sick ****s.

 

You seen General Chat?

 

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here's what a nuclear engineer thinks of it:

After scram (complete shutdown), about 5% is still there and that level reduces in half every 15 minutes. So for a 3000MW thermal reactor (like this one), 600MW is still there after immediate shutdown, 300MW 15 minutes later, 150MW 30 minutes later, and so forth.

In a Boiling water reactor of that model, there are 3 cooling pumps in series (one for the cold feed and two after each hot feed loop). During a scram, those pumps must be shut off so that you don't get vibrational feedback (which could break a pipe). However, in the core is designed such that there are jet pumps (16 in parallel on the standard design) on the wet stream loop. This jet pump has no moving parts but can circulate the some water regardless of what the pumps are doing. Further, there is an single emergency main pump on the main loop that can push the full coolant load. This pump can be driven by any one of several diesel systems or a battery backup.

If all of this fails, you then start to depend on the cold water back up re-condenser. In a BWR, underneath the first reactor containment, there is a large torus shaped area that is filled with a large amount of water. You can drop the steam from the reactor into this ring. The steam recondenses and reduces pressure. With the jet pumps, you can push the cold water into the reactor. This system can prevent first containment failure but doesn't prevent core damage.

Then there is a second level containment. The design based accident for this reactor is assume a main coolant pipe dissappears (double guillotine break), all of the coolant flushes out and there is no way to cool down the reactor. In this case, 600MW post scram level will melt the reactor and possibly damage first containment, but second containment can hold the total heat produced post scram. You also have a coreium (term for molten core) catcher that catch the core, mix in a huge amount of radiation shield, and reduce the temperature.

What is happening: Earthquake happens, core is scrammed because something might break. When the scram happens, main pumps turned off, emergency main pump turned on. However, the diesel generator doesn't work, maybe damage in earthquake, maybe something else. They turn on the battery system. It can last 4 hours, which is enough to reduce core power to 10kW. However, it is hot in there and 10kW is still enough to continue to make steam. So the water level (which tells you how much steam has been made) is dropping. They can go to the recondenser if they need to, but the recondenser doesn't rule out core damage (not melting, but material warping and oxidation) which would be expensive or impossible to repair. So for now, they are bringing in new coolant so they can prevent expensive core damage.

They are NOWHERE close to the design based accident, and there is very little worry about containment failures. They are doing the evacuation because there isn't the safety factor they want, not because they are anywhere close to a radiation leak.

 

Whilst there is worry about meltdown in nuclear reactors the actual effects are nowhere as extreme as the "China Syndrome" theory, in the event of a meltdown the actual bore depth of the core material would be in the region of 30 to 40 feet as the surrounding ground layers would absorb and disapate the heat, a meltdown could not go further than the liquid mantle as it would be dispersed on entry to this level. The main fear relating to meltdown at Chernobyl was the water that built up under the reactor containment vessel in the plant structures, in the event that the core breeched the containment in a meltdown and entered the structures below filled with water this would produce a massive explosion expelling the core into the atmosphere and creating a massive radiation cloud. The radiation that was released due to core exposure was hugely serious but this meltdown scenario would have been many times worse, the Russians knew there were problems with the reactor design and operational problems under certain circumstances, but because of political idealogy which did not allow for the addmission of failings information was not shared between sites and the soviet leadership classified information critical to the failure at Chernobyl as top secret, this meant that the control room staff at Chernobyl were unaware of the problem that could occur and that following the normal scram proceedure under the circumstances that did occur would actually increase the problem and not resolve it. The rest is of course now history.

 

thank **** im irish and we just wont allow nuclear reactors ..even though wer goosed if sellafield goes

 

I just rung my Japanese friend to make sure he was okay after the Tsunami and all he did was go on about his social life.

Just kept going on and on about a huge rave

 

True but Ireland has to import most of its fuel to produce energy and has a high proportion of oil fired generation, what all the green facists don't let on is that wind power which is hailed as the great saviour is highly inefficient, heavily subsidised at cost to the taxpayer, causes massive visual pollution, is more expensive for the consumer and each turbine costs upwards of £1million dependent on MW delivery, the other point in the UK that gets buried is that we don't even manufacture them in this country but buy them from China. There was another fact that quietly came out during the last blast of snow before Christmas, as we rely more on "Renewable" energy which are mainly windfarms there is a small problem that when the windfarms are unable to meet demand we have to have a backup, as we construct more windfarms and they are put into the system to meet artificial green targets the need for a backup generating capacity will correspondingly increase. The upshot of this policy is that as we rely more on windfarms we will have to build more powerstations to fill shortfalls in generation, when the wind doesn't blow, blows too strongly, it gets cold and the turbines can only work at around 10% of capacity as per winter and so on, the irony is that we will have to build more powerstations than we would have done if we didn't have any windfarms to generate electricty.

 

Watching news and they are saying one of the reactors is on melt down.

Jesus this is devastating, all those lives lost.

As for the jokes, my mate txt me with one, dont think he's happy with my reply the b******.

 

It isn't what you could call a laughing matter is it? Lots of lives lost already and a lot more to come and some of those that aren't killed will die eventually because of side affects.

No, not a laughing matter at all.