Patent ID: 8481986
Filing Date: 2013-07-09
Classification: C21C,C21D,C22C,G21F

Abstract:
1. A cask for spent fuel, comprising: a cylindrical container; a lattice-shaped basket that is housed in the container and is for housing spent fuel therein; a lid for sealing the container; an outer cylinder covering the entire container; a resin for absorbing neutrons that is housed between the container and the outer cylinder; cooling fins provided in the resin in order to connect the container and the outer cylinder; and the basket being manufactured of a neutron shielding material made of boron-adding stainless steel of austenite-ferrite two-phase stainless steel or ferritic stainless steel, the austenite-ferrite two-phase stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 3.0 to 10.0%, and Cr: 21.00 to 32.00%, the ferritic stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 4.0% or less, and Cr: 11.00 to 32.00%, and the boron-adding stainless steel being well in ductility and thermal conduction property.