Induced nuclear reactions: processes – systems – and elements – Reactor structures – Circulating fluid within reactor
Patent
1997-12-05
1999-10-05
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Reactor structures
Circulating fluid within reactor
376372, 96208, 96216, 96220, 55DIG23, G21C 1516
Patent
active
059636114
ABSTRACT:
A separator/injector having an outlet pressure higher than an inlet pressure thereof is introduced instead of the dynamic equipment for a reactor recirculation system that is necessary in the prior art, to achieve both liquid-vapor separation and forced circulation. A jet pump and a recirculation flow-rate control valve are provided in a lower portion of a downcomer portion of a reactor pressure vessel. A shroud head has a double-walled structure, a two-phase liquid-vapor flow that is flowing from a lower portion of the lower shroud head is accelerated by an accelerator nozzle of the separator/injector, and a liquid component of the thus-separated flow is increased in pressure and guided into a jet pump through a space formed between the double shroud heads. Alternatively, a circular cylindrical separator/injector in which the steam nozzle and diffuser are disposed in a helical form in close proximity to the inner wall of a circular tube above the stand pipe could be provided instead of this separator/injector.
REFERENCES:
patent: 3031977 (1962-05-01), Elliott
patent: 5130082 (1992-07-01), Oosterkamp
patent: 5321731 (1994-06-01), Oosterkamp
Akiba Miyuki
Morooka Shinichi
Nakamaru Mikihide
Narabayashi Tadashi
Yasuoka Makoto
Kabushiki Kaisha Toshiba
Wasil Daniel D.
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