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Re:Application submitted for US molten salt research reactor by Rokid on Tuesday August 23, 2022 @01:41AM (#32560842)
One of the great practical challenges with molten salt is to design a reliable valve. At temperatures this high and with the high corrosive properties of the medium, this is not trivial.
Re:Application submitted for US molten salt research reactor by mikewarot on Tuesday August 23, 2022 @05:59AM (#32562548)
I didn't realize that the viscosity stays high for molten salt[1], that makes everything abrasive, along with dealing with possible phase change if the salt solidifies... yikes!

So, what we're dealing with is highly radioactive corrosive molasses with a constant stream of radioactive decay product gasses bubbling out of it, like Xenon and Iodine. Yeah, that seems more challenging that I first thought.

  1 - https://www.powermotiontech.com/home/article/21144640/armoring-a-valve-against-molten-salt