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The A high school in Richland, Wash., is emblazoned with a mushroom cloud. But some are asking for better ways to recognize the city’s history-altering past.

The same time, then we really should be very worried. and these things are the breach and the confinement chamber of a nuclear power plant. so, every nuclear reactor that contains a core, nuclear core, reactor core, is protected by a very robust reinforced concrete confinement chamber that is designed to withstand an explosion internally of the reactor core that might release this radioactivity. it's designed to contain that radioactivity inside but it is also designed to withstand the outside impact of a certain intensity. of course, the staged shelling by missiles and artillery might comprom...

About the possible dangers. >> what is critical for a safe operation of a nuclear reactor is the functioning of a cooling system of a reactor core. so if you can imagine, it's a sort of big pool in to which the fuel rod's inserted. and it has to have a constant supply of cold water to keep that core and that nuclear fuel at a certain temperature. and of course that system relies on a supply of water. that supply of water depends on the functioning of the pumps that pump that water to the core and the pumps rely on electricity. there are backup electricity systems should the main power grid go ...

Send u.s. forces into ukraine. here to discuss, democratic congresswoman elaine luria of virginia, the vice chair of the house armed services committee. congresswoman, good to see you. you served as a navy officer for 20 years operating nuclear reactors as an engineer. what is your biggest fear when you hear that russian troops have now taken over and are controlling the site of the chernobyl nuclear disaster? >> jake, thanks for having me again. you know, the site of the chernobyl disaster that happened in 1986, there's a lot of contamination, a lot of very difficult work went into encasing e...

These systems could be compromised, and then we really have to worry that -- that there could be a serious accident. >> right. and -- and to that point, how can a scenario like this be perhaps better mitigated? i think only one reactor of the six was running. if the reactors aren't running, are they safe or safer? or -- or not? >> well, even as a controlled shutdown of the reactor, it's not like you just click a switch and it's off. the fuel remains in the core for some time, for several weeks actually, until it's cool enough to take out and transport to a spent-fuel pool that's normally outsi...