JPS5788288A - Internal pump - Google Patents
Internal pumpInfo
- Publication number
- JPS5788288A JPS5788288A JP16332980A JP16332980A JPS5788288A JP S5788288 A JPS5788288 A JP S5788288A JP 16332980 A JP16332980 A JP 16332980A JP 16332980 A JP16332980 A JP 16332980A JP S5788288 A JPS5788288 A JP S5788288A
- Authority
- JP
- Japan
- Prior art keywords
- water
- cooling water
- nuclear reactor
- flow
- preventing means
- 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
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
PURPOSE: To enable to supply a sufficient amount of cooling water into a motor case, by providing a back-flow preventing means at a portion of a fluid passage in the motor case of an internal pump used for circulating nuclear reactor cooling medium.
CONSTITUTION: When a shaft 4 is set into rotation and cooling water is supplied forcedly by an auxiliary impeller 3, water tends to flow reversely from a water chamber A to a water chamber B but it is prevented by a back-flow preventing means 19. At the time when operation of a pump is stopped, temperature of the pump is raised by the heat transmitted from a pressure vessel of a nuclear reactor, with the temperature rise being greater toward above, and water is made to flow from the water chamber B to water chamber A by way of natural convection, so that the back-flow preventing means 19 is not operated. Therefore, a sufficient amount of cooling water flows as shown by dotted lines in the drawing by way of natural convection, by-passing small gaps in bearings, so that heat transmitted from the pressure vessel of the nuclear reactor can be absorbed by the cooling water.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16332980A JPS5788288A (en) | 1980-11-21 | 1980-11-21 | Internal pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16332980A JPS5788288A (en) | 1980-11-21 | 1980-11-21 | Internal pump |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5788288A true JPS5788288A (en) | 1982-06-02 |
Family
ID=15771776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16332980A Pending JPS5788288A (en) | 1980-11-21 | 1980-11-21 | Internal pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5788288A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58211595A (en) * | 1982-06-04 | 1983-12-09 | Hitachi Ltd | Thrust balancing apparatus for submergible pump |
JPS59160093A (en) * | 1983-03-04 | 1984-09-10 | Hitachi Ltd | Shaft thrust load reducing device for submergible pump |
-
1980
- 1980-11-21 JP JP16332980A patent/JPS5788288A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58211595A (en) * | 1982-06-04 | 1983-12-09 | Hitachi Ltd | Thrust balancing apparatus for submergible pump |
JPS59160093A (en) * | 1983-03-04 | 1984-09-10 | Hitachi Ltd | Shaft thrust load reducing device for submergible pump |
JPS626119B2 (en) * | 1983-03-04 | 1987-02-09 | Hitachi Ltd |
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