DRAINAGE APPARATUS AND DRAINAGE METHOD FOR REACTOR COOLANT SYSTEM
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United States of America Patent
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Issued Date -
Jun 18, 2009
app pub date -
Aug 12, 2008
filing date -
Dec 18, 2007
priority date (Note) -
Abandoned
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Abstract
A drainage apparatus and a drainage method for a reactor coolant system are disclosed. According to the drainage apparatus and the drainage method, the gravity drainage procedure for performing the decomposition maintenance of a main valve forming the pressure boundary part between the RCS and the safety injection system is improved by a forced drainage procedure using a drainage pump, and there are the effects that working period for a planned preventive maintenance is shortened, liquid waste of a coolant of the reactor is not generated, reprocessing costs are decreased, and the economical efficiency and the safety of the nuclear power plant are improved.
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