Method of shutting down a high-temperature reactor

Details Method of shutting down a high-temperature reactor Method of shutting down a high-temperature reactor

1981-07-23

1984-12-04

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By coolant flow

376244, 376381, 376383, G21C 732

Patent

active

044863802

ABSTRACT:
In the method of shutting down a high temperature nuclear reactor having a negative temperature coefficient of reactivity, such as a gas cooled pebble-bed nuclear reactor, while the core is operating in the critical state with the core having a predetermined critical average core temperature and with the heat generated in the critical state being removed by a coolant, effecting the shut down by reducing or discontinuing the removal of heat from the reactor core and increasing the average core temperature by an amount above the critical average core temperature for rendering the core hot sub-critical due to the negative temperature coefficient of reactivity. The core can be maintained in the hot sub-critical state by a controlled removal of after shut-down heat from the core.

REFERENCES:
patent: 3042595 (1962-07-01), Cobb
patent: 3255087 (1966-06-01), Maldague
patent: 3423285 (1969-01-01), Curry
patent: 3519536 (1970-07-01), Rausch
patent: 3620315 (1971-11-01), Walton
patent: 3802992 (1974-04-01), Griffith
Lamarsh, "Introduction to Nuclear Reactory Theory" Addison-Wesley (1966), pp. 448-451.

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