Patent ID: 6654438
Filing Date: 2003-11-25
Classification: G21C,Y02E

Abstract:
A control rod for a BWR comprising:a first unit comprising a tie rod, a handle mounted on an axially upper portion of said tie rod and a lower support member or falling speed limiter mounted on an axially lower portion of said tie rod; and a second unit comprising a sheath containing therein reactivity control material, an upper end plate mounted on an axially upper portion of said sheath and a lower end plate mounted on an axially lower portion of said sheath; wherein said first unit and said second unit are joined to each other only at said upper end plate and said lower end plate so that said sheath is not fixed to said tie rod, wherein an upper portion of said upper end plate is fixed to said handle, and a lower portion of said lower end plate is fixed to said lower support member or falling speed limiter; whereby said control rod is constructed as a joined body of said first unit and said second unit.