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1. (WO2018125578) BOLT INSTALLATION AND TENSIONING SYSTEM

Pub. No.:    WO/2018/125578    International Application No.:    PCT/US2017/066200
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Thu Dec 14 00:59:59 CET 2017
IPC: G21C 13/06
B23P 19/06
G21C 19/11
G21C 19/20
B25B 29/02
Applicants: NUSCALE POWER, LLC
Inventors: SHAW, Steven, W.
NOEL, Derek
Title: BOLT INSTALLATION AND TENSIONING SYSTEM
Abstract:
A bolt installation and removal, BIR, system is used for assembling and disassembling a nuclear vessel. The BIR system includes a platform (210) with a stand for supporting the nuclear vessel. A track (204) extends around an outside perimeter of the platform and multiple tool carts (202) include wheels (208) that roll on the track. Tool towers (212) are located on the carts and include tool assemblies (214) configured to install and remove bolts (220) on the nuclear reactor vessel. Magazine towers (216) also extend up from the tool carts next to the tool towers and include magazines (218) that hold bolts for exchanging with the tool assemblies. Drive mechanisms (238) move tool heads in the tool assemblies around a first vertical axis, vertically up and down, and laterally to more simply and reliably install and remove the bolts in a radioactive underwater environment.