Patent Number: 
Section: claims

1. A core spray sparger T-box attachment assembly for a nuclear reactor pressure vessel, the pressure vessel including a shroud, a sparger T-box penetrating the shroud, a plurality of sparger distribution header pipes coupled to the sparger T-box, and a downcomer pipe, the sparger distribution header pipes including at least one sparger nozzle, the attachment assembly including a downcomer pipe coupling and a sparger T-box clamp, the sparger T-box clamp comprising:an anchor plate having a draw bolt opening to receive a draw bolt;a first clamp block substantially aligned at a first end of the anchor plate; anda second clamp block substantially aligned at a second end of the anchor plate;wherein the anchor plate is connected to the first clamp block by a first multiple-degree-of-freedom connection,wherein the first multiple-degree-of-freedom connection prevents relative linear movement between the anchor plate and the first clamp block in a plane including the anchor plate and the first clamp block, andwherein the anchor plate is connected to the second clamp block by a second multiple-degree-of-freedom connection. 2. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has at least two degrees of freedom. 3. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has at least two degrees of freedom that include one or more of roll, pitch, and yaw. 4. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has at least two degrees of freedom that include two or more of roll, pitch, and yaw. 5. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has at least three degrees of freedom. 6. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has at least three degrees of freedom that include two or more of roll, pitch, and yaw. 7. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has at least three degrees of freedom that include roll, pitch, and yaw. 8. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has four degrees of freedom. 9. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has four degrees of freedom that include roll, pitch, and yaw. 10. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has at least two degrees of freedom, andwherein the second multiple-degree-of-freedom connection has at least two degrees of freedom. 11. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has at least three degrees of freedom, andwherein the second multiple-degree-of-freedom connection has at least three degrees of freedom. 12. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection has four degrees of freedom, andwherein the second multiple-degree-of-freedom connection has at least four degrees of freedom. 13. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection includes:a post connected to the anchor plate;wherein the post fits into a guide in the first clamp block to form the multiple-degree-of-freedom connection. 14. The attachment assembly of claim 1, wherein the first multiple-degree-of-freedom connection includes:a post connected to the first clamp block;wherein the post fits into a guide in the anchor plate to form the multiple-degree-of-freedom connection. 15. A core spray sparger T-box attachment assembly for a nuclear reactor pressure vessel, the pressure vessel including a shroud, a sparger T-box penetrating the shroud, a plurality of sparger distribution header pipes coupled to the sparger T-box, and a downcomer pipe, the sparger distribution header pipes including at least one sparger nozzle, the attachment assembly including a downcomer pipe coupling and a sparger T-box clamp, the sparger T-box clamp comprising:an anchor plate having a draw bolt opening to receive a draw bolt;a first clamp block substantially aligned at a first end of the anchor plate; anda second clamp block substantially aligned at a second end of the anchor plate;wherein the anchor plate is connected to the first clamp block by a first multiple-degree-of-freedom connection,wherein the first multiple-degree-of-freedom connection prevents relative linear movement between the anchor plate and the first clamp block in a plane including the anchor plate and the first clamp block,wherein the anchor plate is connected to the second clamp block by a second multiple-degree-of-freedom connection, andwherein the second multiple-degree-of-freedom connection prevents relative linear movement between the anchor plate and the second clamp block in a plane including the anchor plate and the second clamp block. 16. The attachment assembly of claim 15, wherein the first multiple-degree-of-freedom connection includes:a post connected to the anchor plate;wherein the post fits into a guide in the first clamp block to form the multiple-degree-of-freedom connection. 17. The attachment assembly of claim 15, wherein the first multiple-degree-of-freedom connection includes:a post connected to the first clamp block;wherein the post fits into a guide in the anchor plate to form the multiple-degree-of-freedom connection. 18. A core spray sparger T-box attachment assembly for a nuclear reactor pressure vessel, the pressure vessel including a shroud, a sparger T-box penetrating the shroud, a plurality of sparger distribution header pipes coupled to the sparger T-box, and a downcomer pipe, the sparger distribution header pipes including at least one sparger nozzle, the attachment assembly including a downcomer pipe coupling and a sparger T-box clamp, the sparger T-box clamp comprising:an anchor plate having a draw bolt opening to receive a draw bolt;a first clamp block substantially aligned at a first end of the anchor plate; anda second clamp block substantially aligned at a second end of the anchor plate;wherein the anchor plate is connected to the first clamp block by a first multiple-degree-of-freedom connection,wherein the anchor plate is connected to the second clamp block by a second multiple-degree-of-freedom connection, andwherein the first and second multiple-degree-of-freedom connections prevent relative linear movement between the first clamp block and the second clamp block in a plane including the first clamp block and the second clamp block. 19. The attachment assembly of claim 18, wherein the plane including the first clamp block and the second clamp block also includes the anchor plate. 20. The attachment assembly of claim 19, wherein the first and second multiple-degree-of-freedom connections prevent relative linear movement between the anchor plate, the first clamp block, and the second clamp block in the plane including the anchor plate, the first clamp block, and the second clamp block.