Chemistry of inorganic compounds – Oxygen or compound thereof – Water
Patent
1996-01-16
1998-03-31
Tran, Hien
Chemistry of inorganic compounds
Oxygen or compound thereof
Water
422171, 422173, 422177, 422188, 422198, 422211, 422903, 476DIG267, 476DIG271, 376301, F01N 310, G21C 1932, C01B 500
Patent
active
057335206
ABSTRACT:
In a boiling water reactor having two extraction systems, one in use and the other held as a backup, a method and apparatus for extracting condenser exhaust gases of the reactor include a preheater for heating condenser gases which are then used for heating a recombiner of the extraction system. Auxiliary steam from the turbine is directed to the preheater for heating the condenser gases. A bypass line bypasses a valve in the auxiliary steam pipeline from the turbine to the preheater. The operating extraction system receives heating steam through the auxiliary pipeline, while the backup extraction system has the valve in the auxiliary steam pipeline closed. The recombiner of the backup extraction system is kept heated by guiding steam through the bypass line to the preheater, where the steam expands and is thereby heated, and directing the expanded steam through a vent line to the recombiner.
REFERENCES:
patent: 4228132 (1980-10-01), Weems
patent: 4430292 (1984-02-01), Shimada et al.
patent: 4780271 (1988-10-01), Dezubay
Blangetti Francisco
Galvagno Alfredo
Asea Brown Boveri AG
Tran Hien
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