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Strategies & Market Trends : 2026 TeoTwawKi ... 2032 Darkest Interregnum -- Ignore unavailable to you. Want to Upgrade?


To: TobagoJack who wrote (132967)4/9/2017 2:49:23 PM
From: Elroy Jetson  Read Replies (1) | Respond to of 217593
 
The wondrous things you can do without democracy in China and their potential customers in Saudi Arabia and Indonesia. Pebble-bed reactors are safer (no potential melt-down) but the downside is the total volume of radioactive waste is much larger (the graphite and entire reactor vessel, plus a cement on decommissioning.

A pebble-bed reactor, like all nuclear reactors using uranium fuel, create an accumulation of Caesium-137 and Strontium-90 dust over time. The graphite balls contains only a small percentage of these two elements so the entire inside of the reactor and heat exchange is contaminated with these dusts.

Germany built a pebble-bed reactor in 1966 and decommissioned it 22 years later in 1988 after the Chernobyl accident changed public opinion. German scientists filled the chamber with cement to chemically bind to the cesium and strontium dust, and samples have shown soil under the containment vessel is also contaminated with Cesium and Strontium. If Germany were China they could build a thousand year storage facility at the site of their choosing and transport the used reactor there.

If the description says these 0.5 mm fuel pebbles are jacketed in graphite then silicon carbide - then placed inside a 60 mm graphite ball without a second exterior silicon carbide cover on the 60 mm ball. This would be a different design to German and US pebble-bed reactors, but you can't tell from the photo as silicon carbide is roughly the same black color as graphite.