Depressurization and cooling system for a containment of a nuclear power plant containment protection system and nuclear power plant
AssigneeFramatome
InventorAxel Hill
Life of this patent
Estimating the term…
Abstract
A depressurization and cooling system for steam and/or condensable gases located in a containment. The system contains a steam condenser having an upstream port connected to the containment through an exhaust line and a downstream port connected to the containment through a backfeed line. The backfeed line contains a backfeed compressor. A re-cooling system for re-cooling the steam condenser is provided. The depressurization and cooling system is effective for re-cooling of the steam condenser. Accordingly, this is achieved as the re-cooling system is self-sustainable.
Claims19
A depressurization and cooling system for steam and other condensable gases disposed in an atmosphere within a containment, the depressurization and cooling system comprising:
- an exhaust line;
- a steam condenser having a backfeed line with a backfeed compressor, an upstream port connected to the containment through said exhaust line and a downstream port connected to the containment through said backfeed line;
- a re-cooling system for re-cooling said steam condenser, said re-cooling system having a closed-loop working fluid thermodynamic cycle system, wherein said steam condenser is a heat source, said re-cooling system having along said closed-loop working fluid thermodynamic cycle system:
- a first heat exchanger thermally coupled to said steam condenser;
- an expansion engine fluidly connected to said first heat exchanger;
- a second heat exchanger fluidly connected to said expansion engine;
- a compressor pump fluidly connected downstream from said second heat exchanger and upstream from said first heat exchanger;
- said expansion engine powering said compressor pump;
- a superheater connected downstream from said first heat exchanger and upstream from said expansion engine, wherein said superheater is thermally coupled to said exhaust line such that said superheater is heated by exhaust stream.
A containment protection system for a nuclear power plant having a containment, the containment protection system comprising:
- an exhaust line for a containment atmosphere exhaust stream being connected to the containment;
- a steam condenser being switched into said exhaust line;
- a backfeed line for a gaseous portion of the containment atmosphere exhaust stream leading from said steam condenser to the containment;
- a backfeed compressor being switched into said backfeed line;
- a cooling circuit for re-cooling said steam condenser, said cooling circuit containing:
- a first heat exchanger thermally coupled to said steam condenser;
- an expansion engine;
- a compressor pump;
- a heat sink;
- a second heat exchanger thermally coupled to said heat sink;
- said expansion engine powering said compressor pump;
- and
- a superheater disposed between said first heat exchanger and said expansion engine, said superheater is thermally coupled to said exhaust line such that said superheater is heated by the containment atmosphere exhaust stream.
Dependencies are inferred from the claim text.