Ah, so basically critical reactor is active fission. Since critical is usually used to decribe something that is beyond normal operating parameters the confusion creates. still a nuclear reactor can be critical technically in a bad sense, if we use critical definition as defined in first google link: Being in or verging on a state of crisis or emergency, Fraught with danger or risk; perilous.thaluikhain said:Normal in the sense for the reactor to work, it has to be critical.Strazdas said:Explain please, how does critical = normal.Vegosiux said:"The reactor's going critical!"
Oh, well that's good. Means it's entering its normal operational parameters after all.
Similarly, there's a big difference between a nuclear weapon initiating, and exploding. If the trigger charge goes off, and there is no nuclear reaction, that's a chemical explosion. If the nuclear reaction goes off as intended, that's a nuclear initiation. If a plane carrying a nuclear warhead crashes, the device might explode (which is bad), but unless it was armed, it won't initiate (which is much worse).
Though yeah the technical definitino for reaction does create a lot of confusion.
also i always called nuclear initiation simply "nuclear reaction" as far a weapons goes. oh well.
How about passive nuclear reactors using thorium, that is not self-sustained but can be easily "Agitated" into reaction and produces more energy than is needed to make it react? that ones would not fit the critical definition you give and still would be nuclear reactors.Vegosiux said:I'll actually let Wikipedia explain it, will do a better job than me.
http://en.wikipedia.org/wiki/Prompt_criticality
Basically, "critical" means the reaction is self-sustaining and constant. That's how you'd expect a nuclear reactor to operate if you wanted it to be useful at all. Supercriticality and prompt criticality are the areas where things can start getting out of hand if you're not careful with them.
closed parking lots multiply the sound volume a lot. ive seen such things happen in real life multiple times sicne one of our supermarket underground parking lot is liked by local drifters.Mr_Spanky said:The seemingly habitual tire squeal in movies and shows. YES the tires WILL make that noise sometimes but not when pulling away at the kind of speed that they are actually going at. The best example of this I can think of is in "The Transporter" in the very opening scene when Mr Statham is going about 10-15mph in a car parking lot. And the tires make SOOOOO much noise. Petty possibly - but I wish they'd cut it out. Would make it more effective when someone really is high-tailing it and slamming on max power.