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 Post subject: Re: Waste Disposal
PostPosted: Sep 10, 2014 11:23 pm 
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Joined: Apr 19, 2008 1:06 am
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Once you have fission products separated, you can dump them in dry holes from oil or gas drilling. Save on Yuccas!. Recommended with closed cycle only.
You could also clad it in recovered fuel cladding and drop them as heat source in shafts drilled in bitumen mines. May save microwave effort.


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 Post subject: Re: Waste Disposal
PostPosted: Sep 11, 2014 10:08 am 
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Joined: Jun 05, 2011 6:59 pm
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Location: NoOPWA
jagdish wrote:
Once you have fission products separated, you can dump them in dry holes from oil or gas drilling. Save on Yuccas!. Recommended with closed cycle only.
You could also clad it in recovered fuel cladding and drop them as heat source in shafts drilled in bitumen mines. May save microwave effort.
Personally, I would prefer to use the other extractable FP and not waste them either. For example, both the Cs137 and Sr90 have good uses. Why waste them?

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 Post subject: Re: Waste Disposal
PostPosted: Sep 11, 2014 12:00 pm 
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Cs-137 and Sr-90 are useful heat sources. in RTG or softening bitumen.


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 Post subject: Re: Waste Disposal
PostPosted: Sep 13, 2014 12:45 am 
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jagdish wrote:
Cs-137 and Sr-90 are useful heat sources. in RTG or softening bitumen.
Cs137 is a gamma source and not very good for RTGs, though bitumen softening may be good. I view it more as a preservative agent (irradiant). Sr90 is indeed good for RTGs or perhaps a SRG.

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 Post subject: Re: Waste Disposal
PostPosted: Sep 15, 2014 12:22 pm 
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Softening bitmumen? What are y'all on about?


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 Post subject: Re: Waste Disposal
PostPosted: Sep 15, 2014 12:35 pm 
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Someone a while ago suggested injecting cartridges of fission products into tar sands plays in Canada to soften them - the idea being it would reduce the quantity of steam required to get the material out of the ground.


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 Post subject: Re: Waste Disposal
PostPosted: Sep 16, 2014 10:59 am 
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^While a gamma emitter would be ideal for spreading heat away from the containers, it would still require a lot of them, and shielding effects of the containers would need to be minimised to allow the gamma rays to escape. Not sure if burying thousands of thin-walled containers of 137Cs in sand is a good idea. The mobility of Cs from any failed or forgotten containers would have to be assessed carefully.


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 Post subject: Re: Waste Disposal
PostPosted: Sep 16, 2014 11:11 am 
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E Ireland wrote:
Someone a while ago suggested injecting cartridges of fission products into tar sands plays in Canada to soften them - the idea being it would reduce the quantity of steam required to get the material out of the ground.


This is crazy. Radiothermal cannot compete with natural gas even at 10x the gas price, and the amounts of cesium required would be enormous. You'd have to use all the cesium in the world and concentrate in one tar sand area to get a meaningful amount of power.


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 Post subject: Re: Waste Disposal
PostPosted: Sep 16, 2014 11:43 pm 
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If the heat given out by fission products is too little for use in mine, it is best used only for RTG. There is more than 200,000 tons of used fuel round the world and fission products will radiate heat equivalent to only 500 tons of fuel in the reactors. For mines one must go the terrestrial energy route and use the steam from the reactors. The main energy has to come from recycling the actinides.


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 Post subject: Re: Waste Disposal
PostPosted: Sep 20, 2014 1:43 am 
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A new use for Sr-90 has been found.
http://www.techtimes.com/articles/15890 ... attery.htm
This could be better than the RTG I have so far thought of.
Another strike for reprocessing. RG Pu for burning U-238/Th remains the best reason.


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