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body 251 Another threat

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    ,

    So how did Hong Tao deal with it?  He didn't advocate this kind of practice on purpose, but reason told him that it's normal to do so.  Members in a group are divided into different ranks, let alone the world.

    So he also asked how the chairmen of other continental alliances used their rights, and then revised and changed the rules and framework of the Asian region.  Depending on the level of contribution, different levels of material are provided to Asian survivor groups.

    What is contribution? Of course, it is the experience of handing in survival.  For example, if you find a way to grow a certain vegetable, well, tell me, and I will submit it to the alliance headquarters. After the approval of the chairman of each continent, you can count the contribution and get the corresponding points.

    The higher the points, the more survival data summed up by the alliance.  The more each continent contributes, the more information the president of the continent gets from the alliance.

    The more information the survivor group gets, the more beneficial it will be for its own development.  This thing seems to be an exchange network. What is exchanged is not material, but knowledge and experience.

    Is there any benefit? It must be.  After it is in operation, it can further stimulate everyone's enthusiasm, give full play to the spirit of three cobblers being the best of Zhuge Liang, and use teamwork to replace the disadvantages of each family's self-sweeping, so that the development speed is more even and faster.

    This time Hong Tao received a notice from the alliance headquarters, and then he remembered to issue a warning to the whole of Asia, especially the domestic survivor groups, so as to prevent them from repeating the same mistakes.

    The content of the announcement is very simple and very poignant. A group of survivors in California, USA sent a final telegram three days ago to bid farewell to all survivors.  They had to evacuate their base in downtown Los Angeles, find a way to fight a bloody path in the streets where zombies roamed, and move north or east.

    They have no idea whether the transfer will be successful, but they have to act, because the Devil's Valley Nuclear Power Plant, tens of kilometers away from downtown Los Angeles, exploded, and a huge column of white steam plumes shot straight into the sky.

    This message was sent by the headquarters of the alliance free of charge, and the chairman of each continental alliance is required to unconditionally forward as many as possible.  There is only one purpose, to remind and call on all survivors to stay away from the nuclear power plant and various nuclear facility areas as soon as possible, the farther the better.  Because at present, no one can determine how far this pollution will spread and to what extent.

    Of course, Hong Tao forwarded the announcement immediately, and checked the list one by one to confirm that all the registered survivor groups in Asia had responded, and then began to think about how to make reasonable suggestions to the domestic survivor teams.

    However, before making a suggestion, you have to look for relevant information. Such a serious matter must not be just said, and it must be supported by some data.

    Without the Internet, it is not so convenient to find information.  Hong Tao ran to three bookstores to gather some evidence, a few maps of the distribution of nuclear power plants across the country in the past two years.

    If you don't look at it, you don't know it, but when you look at it, you will be shocked!  As of the year before last, excluding those under construction, a total of 16 nuclear power plants have been built and put into operation in China, covering all coastal provinces except Hebei.

    Hongyan River in Liaoning, Haiyang and Shidaowan in Shandong, Tianwan in Jiangsu, Qinshan, Fangjiashan and Sanmen in Zhejiang, Ningde and Fuqing in Fujian, Daya Bay, Lingao, Taishan and Yangjiang in Guangdong, Fangchenggang in Guangxi  , Changjiang on Hainan Island.

    So will there be a leak in the nuclear power plant?  According to the analysis of two people who have been engaged in related industries in the Russian and Brazilian survivor groups, it is 100% inevitable.

    Nuclear reactors are generally divided into pool type and shell type. The former is mainly used for experiments, while the latter is a nuclear power plant.  This kind of reactor needs to pump light water (purified water) continuously into the pressure vessel to cool the reactor core, and at the same time use the generated steam to drive a steam turbine to generate electricity.

    Finally, it returns to the condenser to be cooled by ordinary water or seawater, and waits to be pumped into the pressure shell again.  This cycle is a closed circuit, light water will not come into contact with cooling water, and there will be no leakage.

    Once the external power is cut off, the electric pump stops working, and the light water cannot be recirculated, the temperature of the reactor will increase sharply, which will eventually cause the core to melt, burn through the pressure vessel, and then explode in various chemical reactions, including steam.

    In order to prevent this phenomenon from happening, designers have thought of many ways.  For example, once the external power supply stops, the backup power supply will be started immediately to continue to supply power to the water pump, and then the diesel generator set will be started to keep the light water cycle to cool down.

    At the same time, the control rods in the reactor will automatically fall, preventing the fuel rods and neutron rods from continuing to react.  This set of combined punches is successfully completed, and the reactor can basically be shut down in a cold reactor.

    However, the energy reserves of diesel generators and backup power sources are limited. If the power supply cannot be restored for a long time, no one will add fuel to the generator, orDue to mechanical failures in long-term operation, the waste heat of the fuel rods cannot be dissipated, and it slowly accumulates in the pressure shell, and eventually it is still a cold melt pile.

    In fact, this problem was also taken into consideration when designing the third-generation reactors. The designer adopted the principle of gravity to keep the cooling water circulating, or simply submerged the pressure shell directly.  But there will definitely be a nuclear leak, which can be regarded as a strategy of losing the army and keeping the handsome.

    As for whether the second-generation reactor has added more safety facilities to ensure that the cold reactor can be shut down, the situation in each country is different.  However, in the case of long-term unattended operation, no reactor can dare to say that the shutdown of the cold reactor can be 100% successful.  Sometimes theoretically feasible does not mean practically feasible, and many unexpected factors may affect the results.

    The steam explosion of the nuclear power plant in Devil's Valley, California is an example. A large amount of hydrogen gas was produced in its pressure shell due to chemical reactions. In the end, instead of igniting and exploding, it burst the pressure shell like continuously inflating a balloon.

    So how much human life will be affected by a leak or explosion in a nuclear power plant?  There are different opinions on this, and the two survivors in the industry can't give an accurate answer.

    They just cited a more famous example, Chernobyl.  The isolation range at that time was 30 kilometers, and no one could live in this area.  The scope of pollution after the incident was 100 kilometers. People can live within this range, but many agricultural products cannot be exported.

    However, the vicinity of the nuclear power plant can already be visited, the plants are growing well, and there are animals living, and the radiation value in most places tends to be normal.  Of course, the core is still buried deep, and if the cover is opened, the amount of radiation will still be large.

    Although the concentration of nuclear fuel in nuclear power plants is dozens of times lower than that of nuclear weapons, it cannot hold up to a large amount. If hundreds of tons of fuel rods really melt, the instantaneous radiation dose may not be very high, and the sustainable time must be longer than a nuclear explosion.

    In any case, the closer you get to these facilities, the more dangerous they are, and the devil knows if they are really cold and shut down.  In fact, even if the cold reactor is shut down, there is no guarantee that it will never leak. How many years?  Over ten years?  decades?  It's always going to leak anyway

    In this case, Hong Tao definitely didn't want the few remaining survivors to suffer another radiation test. It was for this purpose that he suggested evacuating the coastal cities as soon as possible, and he also explained it to them.

    As for why the new base should be chosen in a big city in the interior, and even encourage people to come to the capital.  It's really not that I want to take advantage of the fire to strengthen my strength, but I thought of another problem.  Since nuclear power plants are not safe, is there a possibility of nuclear bombs leaking?

    I also consulted those two industry insiders on this issue, but they are second-hand, have only been in contact with commercial nuclear facilities, and do not know much about military ones.  The general statement is that both atomic bombs and hydrogen bombs have a shelf life, usually around 20 years.

    After the shelf life has passed, it must be destroyed or extended, but no matter which way it needs to be operated by people.  If no one handles it in time, the leak is certain, but it is not known how long it will happen.

    No matter how long it is, no one wants to live with a decommissioned nuclear bomb that may leak at any time.  So the question is, who knows where the nuclear bomb is kept?
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