Abstract: Radioactive water filter is an important equipment to ensure good water quality control and to reduce radiation dose in coolant circuit of Nuclear Power Unit. This paper developed a non-nuclear high pressure filter housing suitable for the third generation CAP Nuclear Power Unit, and the housing and its function components are designed in strict accordance with ASME BPVC-Ⅷ; finite element model of the housing is established by ANSYS 14.0 analysis software, and all the components fully meet the structural integrity and class II seismic requirements through the mechanical performance analysis under various load conditions; the manufactured housing has passed the hydrostatic test under about 1.25 times the design pressure, and there is no leakage and deformation at the weld, which can completely replace the imported products and break the foreign monopoly.

Key words: coolant circuit, CAP nuclear power unit, high pressure water filter, housing