Hydraulic pressure control unit for control rod drive
Description
The pressure invention concerns a hydraulic pressure control unit for control rod drives in BWR type reactors. The space above a floating piston possessed by an accumulator and the housing of control rod drives are connected by means of a pipeline. The pipeline has a scram valve which is opened upon occurrence of reactor scram. A pump is disposed between the accumulator and the scram valve for communicating a discharge port to apply a high pressure water to the accumulator. According to the present invention, a control unit is disposed between the scram valve and the housing of the control rod drives in the hydraulic pressure control unit for maintaining the cross sectional area of the flow channel of the pipeline to a usual size when the pressure in a pressure vessel is under a rated operation pressure, while limiting the cross sectional area of the flow channel when the pressure is lower than that in the rated operation. Thus, whole insertion of the control rod substantially at a constant speed is enabled irrespective of the level of the pressure in the pressure vessel. (I.S.)
Availability note (English)
Available from JAPIO. Also available from INPADOC.Additional details
Publishing Information
- Imprint Pagination
- 7 p.
- IPC:
- Int. Cl. G21C7/16.
- IPC
- Int. Cl. G21C7/16.
- Patent number
- JP patent document 2-140696/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 22016643
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BWR TYPE REACTORS; CONTROL ELEMENTS; CONTROL ROD DRIVES; FLOW REGULATORS; HYDRAULIC CONTROL DEVICES; PRESSURE VESSELS; PUMPS; REACTOR CONTROL SYSTEMS; SCRAM; VALVES
- Descriptors DEC
- CONTAINERS; CONTROL EQUIPMENT; CONTROL SYSTEMS; ENRICHED URANIUM REACTORS; EQUIPMENT; HYDRAULIC EQUIPMENT; POWER REACTORS; REACTOR COMPONENTS; REACTOR SHUTDOWN; REACTORS; SHUTDOWN; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Secondary number(s)
- JP patent application 63-293556.