Patent ID: 8054932
Filing Date: 2011-11-08
Classification: B01D,C02F,Y02E

Abstract:
1. In a nuclear power plant having an emergency core cooling system comprising at least one double wall concentric tube strainer defining an annular region between a first and second wall of said double wall concentric tube strainer, said annular region being closed at a first end, and open at a second end, said double wall concentric tube strainer being upstream of an intake of an emergency core cooling system pump, such that cooling water must first pass through said double wall concentric tube strainer before it can enter said pump intake, wherein, the improvement comprises: a filter medium being located in said annular region in such a manner that cooling water that passes through said first and second walls must also pass through and be filtered by said filter medium before the water can be pumped to a reactor core; and a retainer extending across said open second end to keep said filter medium in place.