Patent Number: 062018477
Section: claims

1. A T-box assembly for attachment to a core spray nozzle safe end in a boiling water nuclear reactor pressure vessel, the safe end including a first end and a second end and a bore extending from the first end to the second end of the safe end, said T-box assembly comprising: a T-box housing configured to engage the first end of the core spray nozzle safe end;  a cruciform wedge configured to engage a surface of the bore of the core spray nozzle safe end; and  a draw bolt coupled to said cruciform wedge, said cruciform wedge comprising:  a core spray nozzle safe end comprising a first end, a second end, and a bore extending between said first and second ends; and  a T-box assembly configured to couple to said safe end, said T-box assembly comprising a T-box housing configured to engage said first end of said core spray nozzle safe end, a cruciform wedge configured to engage a surface of said bore of said core spray nozzle safe end, and a draw bolt coupled to said cruciform wedge, said cruciform wedge comprising: 2. An assembly in accordance with claim 1 further comprising a T-box cover plate configured to couple to said T-box housing, said cover plate comprising a draw bolt opening configured to accept said draw bolt to couple said cruciform wedge to said T-box housing. 3. An assembly in accordance with claim 2 wherein said T-box housing comprises a first end, a second end, a third end, and a cover opening, said first and second ends configured to be in substantial alignment and to couple to a first and a second core spray header pipe respectively, said third end configured to be positioned in a bore of the core spray nozzle and engage the first end of the core spray nozzle safe end, and said cover opening configured to be in substantial alignment with said third end of said T-box housing and to receive said T-box cover plate. 4. An assembly in accordance with claim 3 wherein said third end of said T-box housing further comprises a plurality of positioning lugs configured to engage the core spray nozzle to center said T-box housing in the nozzle bore. 5. An assembly in accordance with claim 1 wherein said draw bolt is configured to extend through said bore of said central member of said cruciform wedge, said draw bolt comprising a first end and a second end, said first end comprising a cap portion configured to be larger than the diameter of said bore through said central member of said cruciform wedge, said second end configured to extend through said draw bolt opening in said T-box cover plate and to threadenly engage a draw bolt nut. 6. An assembly in accordance with claim 5 wherein said web members of said cruciform wedge are configured to be contoured to minimize flow resistance. 7. A core spray line assembly for a reactor pressure vessel in a nuclear reactor, said core spray line assembly comprising: 8. A core spray line assembly in accordance with claim 7 wherein said T-box assembly further comprises a T-box cover plate configured to couple to said T-box housing, said cover plate comprising a draw bolt opening configured to accept said draw bolt to couple said cruciform wedge to said T-box housing. 9. A core spray line assembly in accordance with claim 8 wherein said T-box housing comprises a first end, a second end, a third end, and a cover opening, said first and second ends configured to be in substantial alignment and to couple to a first and a second core spray header pipe respectively, said third end configured to be positioned in a bore of the core spray nozzle and engage said first end of said core spray nozzle safe end, and said cover opening configured to be in substantial alignment with said third end of said T-box housing and to receive said T-box cover plate. 10. A core spray line assembly in accordance with claim 9 wherein said third end of said T-box housing further comprises a plurality of positioning lugs configured to engage said core spray nozzle to center said T-box housing in aid nozzle bore. 11. A core spray line assembly in accordance with claim 7 wherein said draw bolt is configured to extend through said bore of said central member of said cruciform wedge, said draw bolt comprising a first end and a second end, said first end comprising a cap portion configured to be larger than the diameter of said bore through said central member of said cruciform wedge, said second end configured to extend through said draw bolt opening in said T-box cover plate and to threadenly engage a draw bolt nut. 12. A core spray line assembly in accordance with claim 11 wherein said web members of said cruciform wedge are configured to be contoured to minimize flow resistance.