Discussion in 'The Guru's Pub' started by Jeremy, Mar 13, 2011.
Temperatures have dropped a lot since they last took them.
BWR reactors do not have primary and secondary steam cycles for power generation. They operate a single radioactive loop with includes the turbines, in fact the turbines are radioactive in such a design.
The primary and secondary steam loops apply to PWR designs
I see, so they broke open the loop to pump sea water?
I imagine they will close it and flush it through if they get the pump running.
I think they broke the loop because it took ages for them to get started, I'm not sure if this particular plant had sea water inlets in-case of emergency but if it doesn't I'm pretty sure they will install them.
Radioactive water isn't very bad, provided it's the actual H20 that is radio active and not a contaminant. Hydrogen only has two stable isotopes deuterium (2 neutrons) & tritium (3 neutrons); both are reasonably safe. Tritium undergoes beta negative decay which would be dangerous but it doesn't stay in your system for more than a day or two so it doesn't have the ability to do much damage unless you practically drink it (which would be stupid since it's expensive). Tritium also decays pretty fast, half life is about 12 years.
IANAMD, Beta decaying particles damage your molecules by releasing an electron after they have formed chemical bonds with the proteins in your system, this can denature the protein. The longer an isotope prone to beta decay stays in your system the more likely it is to have been used in a chemical bond within your body. This makes strontium 90 which is absorbed into your bones, very dangerous in the long term (it's very important). However, something like tritium which rockets through your body is unlikely to do much damage.
Beta decay also emits an antineutrino or positron (in tritium's case anti-neutrino's) which when absorbed by an atom will annihilate a neutron or proton respectively. However, these particles are so energetic that they are immensely unlikely to interact with anything on the surface of the earth and will move through several miles of material before there's even a chance of them being absorbed.
If you'd like a wristwatch Smith & wesson amongst others make tritium powered glow in the dark watches. They're a lot safer than the old radium powered watches . They will glow proportionally to the radioactivity of the watch so you can expect 50% falloff every 12 years after manufacture date. Co-incidentally they can serve as an idiot detector just tell people that your wristwatch is radioactive and watch the ensuing hilarity
My ACOG in the army (and most weapon sights) use Tritium for example. Perfectly safe.
Why do things get measured in half-life ?
If half-life of xxx is 12 years, then total life is 24 years, why not just say that ?
EDIT - AH, so they decrease their power by 50% every half-life xxxx years ?
just like tritium night sights for firearms
Correct. After a half life, half the energy is gone. Another half life, and half of that energy is gone, and so on and so forth. The more energy something has, the faster it loses it, therefore it is not a linear loss of energy. Hence why we use half lifes.
Thought I'd share this...
U.S. Govt. confirms that MSNBC lied on its nuclear coverage:
TEPCO press release:
I think we can safely let this thread die since the incident is over.
EDITED FOR PEOPLE TAKING OFFENSE. :bang:
And how was me saying the fact it could happen is bad enough an example of panic/hysteria? Nothing is foolproof buddy. Your arrogance is.. oh I dunno, painfully annoying?
I canz edit posts aswelz....
Oh come on, why edit it out... Show me a factual link that says its over everything is AOK.