Patent ID: 6618460
Filing Date: 2003-09-09
Classification: G21C,Y02E

Abstract:
An integrated reactor vessel closure head assembly comprising:a vessel closure head having a plurality of lifting lugs and a plurality of control rod drive mechanisms; a lift assembly having a plurality of lift rods that extend upwardly from the reactor vessel closure head, each lift rod engaging one of the lifting lugs; a support structure attached to the vessel closure head, the support structure having a ring beam disposed atop the reactor vessel closure head, the ring beam having a plurality of saddle members circumferentially spaced around the ring beam, the saddle members having a lower surface shaped to approximately conform to the vessel closure head; a shroud assembly encircling the control rod drive mechanisms, the shroud assembly attached to the support structure; a baffle structure disposed between the control rod drive mechanisms and the shroud assembly; at least one upwardly extending duct having a proximal end comprising an air inlet disposed near the reactor vessel closure head and a distal end comprising an air outlet; a seismic support system that engages the control rod drive mechanisms and is attached to the support structure; a missile shield attached to the support structure and disposed above the control rod drive mechanisms; and at least one fan disposed above the missile shield and fluidly connected to the air outlet of the at least one upwardly extending duct.