| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 244 | DD | ARRANGEMENTS FOR TREATING, FOR HANDLING, OR FOR FACILITATING THE HANDLING OF, FUEL OR OTHER MATERIALS WHICH ARE USED WITHIN THE REACTOR (e.g., within its pressure vessel) [G21C-19/00] {11} |
| DIG 259 | DD | .~ Arrangements for introducing object into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel [G21C-19/20] {3} |
| DIG 262 | DD | .~.~ Arrangements for obtaining access to the interior of a pressure vessel while the reactor is operating [G21C-19/22] {1} |
| DIG 263 | | .~.~.~ By using an auxiliary vessel which is temporarily sealed to the pressure vessel [G21C-19/24] |