The case for Thorium. 11. Molten Salt Nuclear Reactors have a very high negative temperature coefficient leading to a safe and stable control.

Molten Salt Nuclear Reactors have a very high negative temperature coefficient leading to a safe and stable control. This is another beauty of the molten salt design. The temperature coefficient is highly negative, leading to a safe design enabling simple and consistent feedback. What does that mean?  It means that when the temperature of the fissile core rises, the efficiency of the reaction goes down, leading to less heat generated. There is no risk for a thermal runaway. In contrast,  graphite moderated generators can have a positive temperature coefficient which leads to complicated control, necessitating many safety circuits to ensure proper startup, operation and shutdown. Their worst failure mode is they go prompt critical, and no containment vessel can contain the explosion that would occur, so they were built without one. There have been several major accidents in graphite moderated reactors, with the Windscale fire and the Chernobyl disaster probably the best known.

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lenbilen

Retired engineer, graduated from Chalmers Technical University a long time ago with a degree in Technical Physics. Career in Aerospace, Analytical Chemistry, computer chip manufacturing and finally adjunct faculty at Pennsylvania State University, taught just one course in Computer Engineering, the Capstone Course.

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