NO132972C

An illustrative embodiment of the invention shows an heat exchanger for converting the secondary coolant feedwater in a nuclear power reactor system into superheated steam. The tube sheet adjacent to the feedwater inlet nozzle is protected from thermal shock by discharging the feedwater directly int...

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Bibliographic Details
Main Authors FERRARO J J, MCDONALD B N
Format Patent
LanguageEnglish
Published 11.02.1976
Subjects
BLASTING
DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION
HEAT EXCHANGE IN GENERAL
HEATING
LIGHTING
MECHANICAL ENGINEERING
METHODS OF STEAM GENERATION
STEAM BOILERS
STEAM GENERATION
WEAPONS
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Summary:An illustrative embodiment of the invention shows an heat exchanger for converting the secondary coolant feedwater in a nuclear power reactor system into superheated steam. The tube sheet adjacent to the feedwater inlet nozzle is protected from thermal shock by discharging the feedwater directly into the economizer and establishing a controlled secondary coolant flow or leakage from the economizer along the terminal portion of the tube bundle to the tube sheet. The heat absorbed in the secondary coolant flowing toward the tube sheet raises the coolant temperature and protects the sheet from thermal shock. The secondary coolant that collects between the economizer and the adjacent tube sheet, moreover, can be reintroduced to the tube bundle or bled from the secondary coolant loop.
Bibliography:Application Number: NO19730001186