US 11,732,811 B2
Dual shut-off valve
James Brian Inman, Forest, VA (US)
Assigned to BWXT Advanced Technologies LLC, Lynchburg, VA (US)
Filed by BWXT Advanced Technologies LLC, Lynchburg, VA (US)
Filed on Jun. 4, 2021, as Appl. No. 17/339,601.
Claims priority of provisional application 63/034,630, filed on Jun. 4, 2020.
Prior Publication US 2021/0381609 A1, Dec. 9, 2021
Int. Cl. F16K 5/04 (2006.01); F16K 31/60 (2006.01); F16K 11/14 (2006.01)
CPC F16K 5/0421 (2013.01) [F16K 5/0407 (2013.01); F16K 11/14 (2013.01); F16K 31/60 (2013.01); F16K 2200/202 (2021.08)] 20 Claims
OG exemplary drawing
 
11. A nuclear reactor disposed with a containment structure, comprising:
a reactor core disposed within a pressure vessel;
a coolant outlet line passing through both the pressure vessel and the containment structure; and
a first dual shut-off valve both disposed within the containment structure and in fluid communication with the coolant outlet line, comprising:
a valve body defining an interior cavity and a flow tube passing therethrough;
an outer cylinder including a body portion defining an interior cavity and an outer cylinder through hole passing therethrough, the outer cylinder being rotatably disposed within the interior cavity of the valve body; and
an inner cylinder including a body portion defining an inner cylinder through hole passing therethrough, the inner cylinder being rotatably disposed within the interior cavity of the outer cylinder, wherein the inner cylinder and the outer cylinder are both rotatable between a first position in which a longitudinal center axis of the outer cylinder through hole and a longitudinal center axis of the inner cylinder through hole are aligned with a longitudinal center axis of the flow tube, and a second position in which the longitudinal center axes of the through holes of the outer cylinder and the inner cylinder are not aligned with the longitudinal center axis to the flow tube;
wherein the inner cylinder of the first dual shut-off valve is rotatable with respect to the valve body independently of the outer cylinder.