JPS5788286A - Internal pump - Google Patents

Internal pump

Info

Publication number
JPS5788286A
JPS5788286A JP16332480A JP16332480A JPS5788286A JP S5788286 A JPS5788286 A JP S5788286A JP 16332480 A JP16332480 A JP 16332480A JP 16332480 A JP16332480 A JP 16332480A JP S5788286 A JPS5788286 A JP S5788286A
Authority
JP
Japan
Prior art keywords
pump
cooling water
stopped
opened
arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16332480A
Other languages
Japanese (ja)
Inventor
Akihisa Okada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP16332480A priority Critical patent/JPS5788286A/en
Publication of JPS5788286A publication Critical patent/JPS5788286A/en
Pending legal-status Critical Current

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  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE: To provide an arrangement for an internal pump used for circulating nuclear reactor cooling medium, which is capable of feeding a sufficient amount of cooling water into a motor case even if operation of the pump is stopped, by providing automatically operated valves in a cooling water by-passing passage.
CONSTITUTION: Automatically operated valve 19, 20, opened when operation of a pump is stopped but closed when the pump is in operation, are provided at the portion of bearings 11, 12 in a motor case 2 or in a cooling water by-passing passage for an auxiliary impeller. Since, with such an arrangement, the valves 19, 20 are opened when operation of the pump is stopped, a considerable amount of cooling water is by-passed through small gaps at the bearing portions by way of natural circulation as shown by dotted lines in the drawing. Therefore, it is enabled to deprive heat transmitted from the pressure vessel of a nuclear reactor completely.
COPYRIGHT: (C)1982,JPO&Japio
JP16332480A 1980-11-21 1980-11-21 Internal pump Pending JPS5788286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16332480A JPS5788286A (en) 1980-11-21 1980-11-21 Internal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16332480A JPS5788286A (en) 1980-11-21 1980-11-21 Internal pump

Publications (1)

Publication Number Publication Date
JPS5788286A true JPS5788286A (en) 1982-06-02

Family

ID=15771673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16332480A Pending JPS5788286A (en) 1980-11-21 1980-11-21 Internal pump

Country Status (1)

Country Link
JP (1) JPS5788286A (en)

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