The thread starter needs to study manmade nuclear reactors THOROUGHLY to come to an understanding of how they work, and, therefore, how a natural, accidental, reactor would work.
Reactors get hotter or colder only because of the presence or absence of neutron moderator material in the immediate proximity to the fuel.
The housing of the reactor certainly may need adequate cooling so that it will not suffer from the heat, structurally, but the temperature of the housing has no influence at all on the progress of the nuclear reaction.
Reactors get hotter or colder only because of the presence or absence of neutron moderator material in the immediate proximity to the fuel.
The housing of the reactor certainly may need adequate cooling so that it will not suffer from the heat, structurally, but the temperature of the housing has no influence at all on the progress of the nuclear reaction.