Float level switch for a nuclear power plant containment vessel

Patent · Tue Nov 16 00:00:00 EST 1993

OSTI ID:5311553

Powell, J G

This invention is a float level switch used to sense rise or drop in water level in a containment vessel of a nuclear power plant during a loss of coolant accident. The essential components of the device are a guide tube, a reed switch inside the guide tube, a float containing a magnetic portion that activates a reed switch, and metal-sheathed, ceramic-insulated conductors connecting the reed switch to a monitoring system outside the containment vessel. Special materials and special sealing techniques prevent failure of components and allow the float level switch to be connected to a monitoring system outside the containment vessel. 1 figures.

• DOE Contract Number: AC12-76SN00052
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5262604; A
• Application Number: PPN: US 7-681030
• OSTI ID: 5311553
• Resource Relation: Patent File Date: 5 Apr 1991
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
LEVEL INDICATORS
DESIGN
NUCLEAR POWER PLANTS
REACTOR MONITORING SYSTEMS
CONTAINMENT SYSTEMS
REACTOR INSTRUMENTATION
CONTAINMENT
ENGINEERED SAFETY SYSTEMS
MEASURING INSTRUMENTS
NUCLEAR FACILITIES
POWER PLANTS
THERMAL POWER PLANTS
220400* - Nuclear Reactor Technology- Control Systems