Title:
【発明の名称】燃料集合体
Document Type and Number:
Japanese Patent JP3079877
Kind Code:
B2
Abstract:
A fuel assembly is provided with a coolant ascending path for making coolant rise and a water rod having a coolant descending path for conducting the coolant. A ratio of a flow area in a coolant inlet port of the smallest in coolant ascending path 13 on the downstream side than large diameter tube portion 3E to a flow area of the largest in the axial direction of coolant ascending path 13 in large diameter tube portion 3E is set to be 0.2-20%. In the normal operation, the declination degree from the liquid level in the coolant ascending path, corresponding to the coolant flow rate of the liquid level formed in the coolant ascending path can be controlled. Further, at the time of the excess the change speed of the liquid level can also be controlled.
Inventors:
Kenichi Takeuchi
Koji Nishida
Yasunori Bessho
Yukihisa Fukasawa
Junjiro Nakajima
Koji Nishida
Yasunori Bessho
Yukihisa Fukasawa
Junjiro Nakajima
Application Number:
JP33099893A
Publication Date:
August 21, 2000
Filing Date:
December 27, 1993
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G21C3/326; G21C3/322; G21C7/27; (IPC1-7): G21C3/326; G21C7/27
Domestic Patent References:
| JP5188167A | ||||
| JP6373187A | ||||
| JP7140281A | ||||
| JP6273555A |
Attorney, Agent or Firm:
Yasuo Sakuta