JET PUMP, INTERNAL PUMP, THROTTLING FLOW METER, AND FOREIGN SUBSTANCE FILTER

PROBLEM TO BE SOLVED: To suppress an adhesion of crud on the surface of reactor components, suppress characteristic change of components and lower radiation dose of workers during regular inspection. SOLUTION: A jet pump for a boiling water reactor which is arranged in a reactor pressure vessel and...

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Bibliographic Details
Main Authors MOROOKA SHINICHI, MITSUTAKE TORU, NARABAYASHI SUNAO, KOMITA HIDEO
Format Patent
LanguageEnglish
Published 24.02.2005
Edition7
Subjects
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To suppress an adhesion of crud on the surface of reactor components, suppress characteristic change of components and lower radiation dose of workers during regular inspection. SOLUTION: A jet pump for a boiling water reactor which is arranged in a reactor pressure vessel and recirculating coolant has a nozzle 24 for discharging driving water driven with a recirculation pump arranged outside the reactor pressure vessel, a throat 25 receiving driving water together with driven water in the reactor pressure vessel, a diffuser 26 forming an expanding path where the path of coolant having passed the throat enlarges. At least a part of inner surfaces of the nozzle 24, the throat 25 and the diffuser 26 is coated with a hydrophilic coating. COPYRIGHT: (C)2005,JPO&NCIPI
Bibliography:Application Number: JP20030204568