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Title: Control rod drive hydraulic system

Abstract

A hydraulic system for a control rod drive (CRD) includes a variable output-pressure CR pump operable in a charging mode for providing pressurized fluid at a charging pressure, and in a normal mode for providing the pressurized fluid at a purge pressure, less than the charging pressure. Charging and purge lines are disposed in parallel flow between the CRD pump and the CRD. A hydraulic control unit is disposed in flow communication in the charging line and includes a scram accumulator. An isolation valve is provided in the charging line between the CRD pump and the scram accumulator. A controller is operatively connected to the CRD pump and the isolation valve and is effective for opening the isolation valve and operating the CRD pump in a charging mode for charging the scram accumulator, and closing the isolation valve and operating the CRD pump in a normal mode for providing to the CRD through the purge line the pressurized fluid at a purge pressure lower than the charging pressure.

Inventors:
 [1]
  1. (San Jose, CA)
Issue Date:
Research Org.:
GENERAL ELECTRIC CO
OSTI Identifier:
868378
Patent Number(s):
5128093
Assignee:
General Electric Company (San Jose, CA) OSTI
DOE Contract Number:  
AC03-90SF18494
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
control; rod; drive; hydraulic; crd; variable; output-pressure; pump; operable; charging; mode; providing; pressurized; fluid; pressure; normal; purge; lines; disposed; parallel; flow; unit; communication; line; scram; accumulator; isolation; valve; provided; controller; operatively; connected; effective; operating; closing; parallel flow; rod drive; control rod; pressurized fluid; control unit; flow communication; operatively connected; isolation valve; charging mode; providing pressurized; hydraulic control; variable output; /376/

Citation Formats

Ose, Richard A. Control rod drive hydraulic system. United States: N. p., 1992. Web.
Ose, Richard A. Control rod drive hydraulic system. United States.
Ose, Richard A. Wed . "Control rod drive hydraulic system". United States. https://www.osti.gov/servlets/purl/868378.
@article{osti_868378,
title = {Control rod drive hydraulic system},
author = {Ose, Richard A.},
abstractNote = {A hydraulic system for a control rod drive (CRD) includes a variable output-pressure CR pump operable in a charging mode for providing pressurized fluid at a charging pressure, and in a normal mode for providing the pressurized fluid at a purge pressure, less than the charging pressure. Charging and purge lines are disposed in parallel flow between the CRD pump and the CRD. A hydraulic control unit is disposed in flow communication in the charging line and includes a scram accumulator. An isolation valve is provided in the charging line between the CRD pump and the scram accumulator. A controller is operatively connected to the CRD pump and the isolation valve and is effective for opening the isolation valve and operating the CRD pump in a charging mode for charging the scram accumulator, and closing the isolation valve and operating the CRD pump in a normal mode for providing to the CRD through the purge line the pressurized fluid at a purge pressure lower than the charging pressure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Patent:

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