Title:
NUCLEAR REACTOR EMERGENCY COOLING SYSTEM
Document Type and Number:
Japanese Patent JP2016023953
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a nuclear reactor emergency cooling system capable of preventing a sudden rise of a revolving speed at a time of starting a steam turbine from causing overspeed trip.SOLUTION: A nuclear reactor emergency cooling system 1 comprises: a steam stop valve 11; a steam adjustable valve 12; an oil replenishment pump 13; a steam adjustable valve drive 14; a steam turbine 15; a feedwater pump 16; and a control unit 20. The oil replenishment pump 13 is started in response to the start signal, pumps up oil in an oil tank 40 and feeds the oil to an oil supply passage at a predetermined discharge pressure. The steam adjustable valve drive 14 drives the steam adjustable valve 12 using the oil delivered from the oil replenishment pump 13 as control oil. The control unit 20 controls the steam adjustable valve drive 14 to open the steam adjustable valve 12 at a degree of opening from a full open degree of opening to a predetermined intermediate degree of opening before the steam turbine 15 is started by the reactor steam.SELECTED DRAWING: Figure 1
Inventors:
YAMAMOTO TAKAHIRO
SHINDO KURA
SHINDO KURA
Application Number:
JP2014146067A
Publication Date:
February 08, 2016
Filing Date:
July 16, 2014
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G21C15/18; F01D15/08; F01D17/24; F01D19/00; F01D25/20
Attorney, Agent or Firm:
Hirohito Katsunuma
Hiroyuki Nagai
Takeshi Sekine
Jie Yamanoi
Masashi Yoshida
Hiroyuki Nagai
Takeshi Sekine
Jie Yamanoi
Masashi Yoshida