First article
2010 on may 6, 2000, Japan restarted manjusri fast neutron breeder reactor. The reactor has been out of service since the fire accident caused by sodium coolant leakage in 1995. After the modification of 15, the reactor finally restarted its trial operation, and it is planned to be put into formal operation in the spring of 20 13.
The so-called fast neutron breeder reactor means that the fission reaction is mainly triggered by "high energy" neutrons above 0. 1Mev. Because of the fast neutron speed, this reactor can convert U-238, which is not easy to fission but rich in reserves, into fuel. Properly matched, the fuel conversion rate can reach 130%, realizing the so-called "more burning". Another feature of fast neutron reactor is that plutonium -239 will be produced in the core, which is not conducive to preventing the proliferation of nuclear weapons. As for whether Japan wants to use this fast reactor to generate electricity or to generate electricity by itself, only God knows.
-the dividing line at the end of popular science-
However, you can forget the practical use of manjusri fast reactor for a while.
On August 26th, 2065438 14: 28, an in-reactor relay device (IVTM) of Manjusri Reactor suddenly loosened and fell back to the core during the process of leaving the core. This IVTM is actually a "manipulator" to help the core replace the fuel rods. This is a veritable "smashing pot": IVTM weighs 3.3 tons and is about 2 meters high when it is loose. An intuitive analogy is that a big truck fell from the second floor. Although there is no water leakage in the atomic pressure cooker, 3.3 tons of iron bumps are stuck in the bottom of the furnace and can't be pulled up any more. The side effect is that the control rod of the reactor cannot be completely inserted to the end, and the whole furnace cannot be shut down from now on. ......
However, it should be pointed out that the person in charge of this part is quite responsible compared with TEPCO: busy for half a year, still can't bear the pressure (or grief? ), committed suicide at home last month, it's over.
How does Japan intend to solve this reactor that cannot be shut down? Has the reactor been fatally damaged? Please wait and see!
The second article
Someone talked about this pile of popular science.
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Last year, Japan restarted the Manjusri fast reactor, but just after the restart, a major accident occurred and a relay device fell into the reactor.
Of course, the pile stopped. Three tons of things fell in and the pile didn't stop. Do Japanese dare to sleep?
But stopping the reactor doesn't mean it's over. If the heat exchange system works normally,
The furnace core temperature is also around 200 degrees all the year round.
If one day there is something wrong with the circulatory system, hehe. . . .
What's the key question? I have to admire the ingenious arrangement of providence.
This stove is equivalent to a big pit made by the Japanese, which is full of shit, and then the lid is closed tightly, leaving a hole.
From time to time, I have to dig something from this hole and order nuclear weapons or something.
One day, I felt guilty and dropped my spoon. Now I'm thinking about how to get it out. . . . .
The stove is full of metallic sodium, so you can't see anything from the hole.
I don't know what a few meters of debris is from a 3-ton object. Anyway, it's certain to hit a big hole.
I don't want to generate electricity. If I want to take out the spoon, I must open the toilet seat. . . . . .
How to uncover the toilet lid? . . .
It is filled with liquid sodium of several hundred degrees. . . In order not to touch the air, it must be isolated with argon.
Can you get the sodium out first? . . .
You know, once nothing cools down, the fuel rods are still inside. . . .
If Japan wants to commit suicide, don't take us with you.
How to take out the fuel rods first? . . .
Normally, there is a big turntable inside, like sushi, turn to the position of the hole and then clip it out.
But the problem now is that the spoon fell in and got stuck. . . . .
Do you want to wait for the fuel to burn naturally? . .
I didn't calculate it when it was turned off. I don't know if it should be based on 10 thousand years.
In short, Japanese people are disgusting, and it is not wrong to spend a lot of money on maintenance every day.
Then the electricity won't work for a while, so it's enough to burn some bath water.
I wanted to build an atomic bomb, pretending to be 13,
Look at the anger of the bodhisattva. . .
I don't know what the finale is like, but something went wrong. First, Japan and South Korea suffer.
This stove, facing the Sea of Japan, Nagoya in Nara, Kyoto, and the Korean Peninsula, will become a no-man's land, right?
Young leaders who commit suicide can understand.
Now the mud tide has been completely helpless to this reactor, and it has been maintaining a state of mixed eating and waiting for death. Sodium-cooled reactors cannot be splashed with boric acid like pressurized water reactors, and must be controlled by control rods. Because it is a breeder reactor, God knows when Manjusri will completely shut down (the report of JAEA to IAEA did not mention that the reactor was completely shut down, but only maintained). If the relay device is to be taken out, sodium will solidify and the reactor will melt instantly without heating. However, if the relay device is not taken out, it is impossible to repair and control the control rod that may be damaged. Moreover, if the relay device is taken out, the sodium must also be taken out. Sodium will burn when exposed to air, and how to take it out is a headache. Considering the amazing failure rate of sodium-cooled reactors, we can always see Manjusri become a big bomb.