Patent Number: 
Section: claims

1. A method of replacing a subassembly within a core spray nozzle of a nuclear reactor, the subassembly including a T-box and a thermal sleeve, and the core spray nozzle including a safe end with a converging inner surface, the method comprising:removing the T-box and the thermal sleeve;providing a second T-box and a second thermal sleeve, the second T-box having a first end adjacent the second thermal sleeve;assembling a cruciform subassembly in the safe end of the core spray nozzle, the cruciform subassembly configured to create a seal against an inner circumference of the converging inner surface; andadjusting a clamp attached to a second or third end of the second T-box to seal the cruciform subassembly against the converging inner surface of the safe end of the core spray nozzle. 2. The method of claim 1, whereinassembling the cruciform subassembly in the safe end of the core spray nozzle includes joining together a primary cruciform wedge and a secondary cruciform wedge. 3. The method of claim 1, further comprising:inserting a draw bolt through the cruciform subassembly. 4. The method of claim 1, further comprising:providing a spider adjacent to the cruciform subassembly; andinserting a draw bolt through the spider and the cruciform subassembly. 5. The method of claim 4,wherein the spider directly contacts the cruciform subassembly. 6. The method of claim 2, wherein the primary cruciform wedge includesa first support member extending between a first web member and a second web member, anda second support member extending between a third web member and a fourth web member. 7. The method of claim 6, wherein the secondary cruciform wedge includesa third support member extending between a fifth web member and a sixth web member, anda fourth support member extending between a seventh web member and an eighth web member. 8. The method of claim 7, wherein joining together the primary cruciform wedge and the secondary cruciform wedge includes joining the primary and secondary cruciform members such that the first, second, third, fourth, fifth, sixth, seventh, and eighth webs form an “X” shaped configuration and the first, second, third, and fourth support members form a substantially contiguous support member. 9. The method of claim 8, wherein the first, second, third, and fourth support members are tapered to engage an inside surface of the nozzle safe end. 10. The method of claim 8, wherein the inner circumference of the converging inner surface is defined by an interface between the first, second, third, and fourth support members of the primary cruciform wedge and the secondary cruciform wedge and the converging inner surface. 11. The method of claim 4, wherein the spider is configured to connect to the cruciform subassembly. 12. The method of claim 11, wherein the cruciform subassembly includes a side facing the spider and the spider includes a side facing the cruciform subassembly and the side of the cruciform subassembly facing the spider includes one of a tongue and a groove and the side of the spider facing the cruciform subassembly includes the other of the tongue and the groove. 13. The method of claim 12, further comprising:connecting the spider and the cruciform subassembly via the tongue and groove. 14. A method of replacing a subassembly within a core spray nozzle of a nuclear reactor, the subassembly including a T-box and a thermal sleeve, and the core spray nozzle including a safe end with a converging inner surface, the method comprising:removing the T-box and the thermal sleeve;providing a second T-box and a second thermal sleeve, the second T-box having a first end adjacent the second thermal sleeve;inserting replacement hardware configured to create a seal against an inner circumference of the converging inner surface; andsealing the replacement hardware against the converging inner surface of the safe end of the core spray nozzle by adjusting a clamp attached to a second or third end of the second T-box. 15. The method of claim 14, wherein inserting replacement hardware includes inserting a primary cruciform wedge into the safe end of the core spray nozzle and inserting a secondary cruciform wedge into the safe end of the core spray nozzle. 16. The method of claim 15, further comprising:inserting a draw bolt through the primary cruciform wedge and the secondary cruciform wedge. 17. The method of claim 14, further comprising:providing a spider adjacent to the replacement hardware;inserting a draw bolt through the replacement hardware, and the spider to attach the spider to the replacement hardware. 18. The method of claim 17, whereinthe spider directly contacts the replacement hardware. 19. The method of claim 14 further comprising:providing a spider near the replacement hardware;inserting a drawbolt through the spider and replacement hardware; andtensioning the drawbolt to press the spider against the replacement hardware such that the spider does not directly contact an inside surface of the nozzle safe end.