| 976 / | HD | NUCLEAR TECHNOLOGY |
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| DIG 37 | DD | REACTOR FUEL ELEMENTS AND THEIR ASSEMBLIES; SELECTION OF SUBSTANCES FOR USE AS REACTOR FUEL ELEMENTS [G21C-3/00] {5} |
| DIG 38 | DD | .~ Fuel elements [G21C-3/02] *** (manufacturing DIG. 283) {5} |
| DIG 39 | DD | .~.~ Constructional details [G21C-3/04] {5} |
| DIG 50 |  | .~.~.~ Details of the construction within the casing [G21C-3/16] {3} |
| DIG 51 | DD | .~.~.~.~> Means for storage or immobilization of gases in fuel elements [G21C-3/16B] |
| DIG 52 | DD | .~.~.~.~> Internal spacers; Other nonactive material within the casings (e.g., compensating for expansion of fuel rod; compensating for excess reactivity) [G21C-3/18] *** (interlayers DIG. 53) |
| DIG 53 | DD | .~.~.~.~> With coating on fuel or on inside of casing; with nonactive interlayer between casing and active material; with multiple casings or multiple active layers [G21C-3/20] |