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Nuclear weapons: Difference between revisions

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===Reactor Physics/Fuel Cycle===
===Reactor Physics/Fuel Cycle===
* Natural materials available:
* Natural materials available:
** Uranium. Terrestrial uranium ore of this epoch tends toward a 99.284%/0.711%/0.0058% <sup>238</sup>U/<sup>235</sup>U/<sup>234</sup>U split.
** Uranium. Terrestrial uranium ore of this epoch tends toward a 99.284% / 0.711% / 0.0058% <sup>238</sup>U/<sup>235</sup>U/<sup>234</sup>U split.
** Thorium. For all purposes, entirely <sup>232</sup>Th (look at the half-lives).
** Thorium. For all purposes, entirely <sup>232</sup>Th (look at the half-lives).
* No point in breeding up from lower Z's than <sup>232</sup>Th - No meaningful sources of other actinides
* No point in breeding up from lower Z's than <sup>232</sup>Th - No meaningful sources of other actinides
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* W. G. Sutcliffe and T.J. Trapp. eds. "Extraction and Utility of Reactor-Grade Plutonium for Weapons", Lawrence Livermore National Laboratory. UCRL-LR-I 15542, 1994 (S/RD).  
* W. G. Sutcliffe and T.J. Trapp. eds. "Extraction and Utility of Reactor-Grade Plutonium for Weapons", Lawrence Livermore National Laboratory. UCRL-LR-I 15542, 1994 (S/RD).  
* US DOE "Nonproliferation and Arms Control Assessment of Weapons-Usable Fissile Material Storage and Excess Plutonium Disposition Alternatives", 1997.
* US DOE "Nonproliferation and Arms Control Assessment of Weapons-Usable Fissile Material Storage and Excess Plutonium Disposition Alternatives", 1997.
==Fission Weapons==
==Fission Weapons==
* Criticality - subcritical - supercritical - prompt criticality - critical insertion time - insertion (gun-type) method - spontaneous fission
* Criticality - subcritical - supercritical - prompt criticality - critical insertion time - insertion (gun-type) method - spontaneous fission