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To: jwalsh07
Question [which may be stupid]:

If they had liquid nitrogen to dump on the exposed spent nuclear fuel, would that be a good thing.

One problem is the temperature (so cold that it would be dangerous for the workers -- could only be done with special equipment remotely controlled).

But unlike liquid hydrogen or liquid oxygen, it would not blow up and even if there is some sort of nuclear bombardment to change into other elements, it would not be dangerous (except for radioactive isotopes).

Getting Liquid Nitrogen there would be one problem (with enough volume). Having special equipment to spray such cold material is another (uncharted ground).

29 posted on 03/17/2011 9:40:47 PM PDT by topher (Traditional values -- especially family values -- are the values that time has proven them to work)
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To: topher

Dry Ice is another possibility, but since it is composed of oxygen (very combustible) and carbon (another fire hazard), if there is a chemical reaction it could be bad...


30 posted on 03/17/2011 9:58:33 PM PDT by topher (Traditional values -- especially family values -- are the values that time has proven them to work)
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To: topher

The ability of liquid nitrogen remove heat is about 1000 times less that that of water per unit of mass. Also the flashing away of gaseous nitrogen would carry with it large and concentrated amounts of radioactive particles. Dry ice is capable of removing about 100 times less heat than water per unit of mass. Handling large quantities of solids is very much more difficult that the same mass of liquids. The oxygen in carbon dioxide is not available to support combustion as you suggest in your subsequent post.


34 posted on 03/17/2011 10:26:24 PM PDT by Chaguito
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To: topher

Yes, LN2 would be a good thing.

But if they can’t pump in H20, how do you think they could manage LN2?

Inside all these buildings there is total darkness (no windows, for obvious reasons). Workers move around with flashlights or headlamps. This is what happens in a “station blackout”.

Via NHK, the heroic workers have tried to supply water using “manual pumps”. Our old farm pumps—manual—could not ever supply 1 million gallons.


41 posted on 03/18/2011 12:54:50 AM PDT by saltus (God's Will be done)
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To: topher
Liquid nitrogen would “explode” on contact with something at 100degrees C. That is to say it would evaporate so fast as to be a massive expulsion of gas. In addition hitting the hot rods with a cold spot may actually cause them to rupture - a very bad thing.
54 posted on 03/18/2011 5:17:49 AM PDT by mad_as_he$$
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