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Cvn Nuclear Reactor Boundary Area Parts 1,452 part numbers

Part Number
NSN
NIIN
00119-19457 O-ring
001661074
002080 Tapered Roller Bearing Cup
001000295
00290H O-ring
002500221
0032222 Plain Nut Round
001856389
0048721 Plain Nut Round
001856389
00524K O-ring
002500236
00577H O-ring
002651075
0104-02-12 O-ring
002500221
0104-02-20 O-ring
002651075
012-21072-01 Ball Bearing Annular
001565046
0142-7377 O-ring
008331428
0150091-00 Plain Nut Round
001856389
016985-00 Plain Nut Round
001856389
020035 Flat Washer
000806004
024-7866 O-ring
002500236
026-23421B012 Self-indicating Thermometer Bime
008411439
0275 Bearing Ball
001006170
028-05403 O-ring
001661074
02833 Flat Washer
000806004
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Refueling and overhaul

In the United States Navy, Refueling and Overhaul (ROH) refers to a lengthy process or procedure performed on nuclear-powered naval ships, which involves replacement of expended nuclear fuel with new fuel and a general maintenance fix-up, renovation, and often modernization of the entire ship. In theory, such a process could simply involve only refueling or only an overhaul, but nuclear refueling is usually combined with an overhaul. An ROH usually takes one to two years for submarines and up to almost three years for an aircraft carrier, performed at a naval shipyard. Time periods between ROHs on a ship have varied historically from about 5–20 years (for submarines) to up to 25 years (for Nimitz-class aircraft carriers). For modern submarines and aircraft carriers, ROHs are typically carried out about midway through their operating lifespan. There are also shorter maintenance fix-ups called availabilities for ships periodically at shipyards. A particularly lengthy refueling, maintenance, and modernization process for a nuclear aircraft carrier can last up to almost three years and be referred to as a Refueling Complex Overhaul (RCOH).