Float level switch for a nuclear power plant containment vessel
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.
- Issue Date:
- OSTI Identifier:
- 5311553
- Assignee:
- Dept. of Energy, Washington, DC (United States) PTO; EDB-94-051805
- Patent Number(s):
- US 5262604; A
- Application Number:
- PPN: US 7-681030
- Contract Number:
- AC12-76SN00052
- Resource Relation:
- Patent File Date: 5 Apr 1991
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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