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The energy that graphite released upon a cascade of defects by neutron radiation is 2.7 MJ/Kg, however there is no data on how quick this energy is released. I am interested in this as this not mentioned anywhere on the Windscale disaster

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  • $\begingroup$ For those of us who had never heard of the Windscale disaster: en.m.wikipedia.org/wiki/Windscale_fire. $\endgroup$
    – Ed V
    Jun 15, 2021 at 23:47
  • $\begingroup$ No actual facts, but relaxation of an interstitial atom to an available hole is rather instantaneous. Thus the reaction is limited by the diffusion of holes. (diffusion of interstitials would be orders of magnitude slower). Diffusions of either kind is slow in graphite, as the recrystallization temperature indicates. Combine these opinions into; rather swiftly, then slowing down. Milliseconds to reach a thousand degrees, would be my guess. $\endgroup$ Jun 16, 2021 at 7:09

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