WASHING DEVICE FOR INTERNAL PUMP

PROBLEM TO BE SOLVED: To provide a washing device for internal pumps which can easily and surely remove crud adhered on a stretch tube remotely during the scheduled inspection of a reactor. SOLUTION: For washing the inner surface of the stretch tube (23), in a state with the motor part of internal p...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	ABURA AKINORI, SAEKI KIYOBUMI, KINUGASA KUNIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	DECONTAMINATION ARRANGEMENTS THEREFOR NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS PHYSICS PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT TREATING RADIOACTIVELY CONTAMINATED MATERIAL
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a washing device for internal pumps which can easily and surely remove crud adhered on a stretch tube remotely during the scheduled inspection of a reactor. SOLUTION: For washing the inner surface of the stretch tube (23), in a state with the motor part of internal pumps (6) penetrating a lower head (1a) of a reactor pressure vessel (1) is removed from the pressure vessel and an impeller (22a) and a pump shaft (22b) are removed in the pressure vessel, the device comprises a sealing member (28) for sealing the opening end inside the stretch tube (23), a main shaft (40) inserted from the open end outside the stretch tube (23), support members (32, 34) for rotatably supporting the main shaft (40) to the shaft core of the stretch tube, motor-driven rotation brush (35) installed at the tip end of the main shaft (40) and a cleaning-main unit, containing a spray nozzle (37) supplying washing water. COPYRIGHT: (C)2004,JPO&NCIPI