Title:
【発明の名称】加圧水形原子炉プラント
Document Type and Number:
Japanese Patent JP2839922
Kind Code:
B2
Abstract:
A pressurized water nuclear reactor system (1) includes a vortex mitigator in the form of a cylindrical conduit (33) between the hot leg conduit (11) and a first section (21) of residual heat removal conduit, which conduit (21) leads to a pump (23) and a second section (25) of residual heat removal conduit leading back to the reactor pressure vessel (3). The cylindrical conduit (33) is of such a size that where the hot leg (11) has an inner diameter D1, the first section (21) has an inner diameter D2, and the cylindrical conduit (33) or step nozzle has a length L and an inner diameter of D3; D3/D1 is at least 0.55, D3/D2 is at least 1.9, and L/D3 is at least 1.44, whereby cavitation of the pump (23) by a vortex formed in the hot leg (11) is prevented.
Inventors:
RUISU KOKUUSHUAN ROO
Application Number:
JP33148589A
Publication Date:
December 24, 1998
Filing Date:
December 22, 1989
Export Citation:
Assignee:
UESUCHINGUHAUSU EREKUTORITSUKU CORP
International Classes:
G21C15/18; G21D1/00; G21C1/08; (IPC1-7): G21C15/18; G21D1/00
Attorney, Agent or Firm:
Mitsuteru Soga (3 outside)