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Reliable Replacement Warhead

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The joint DOE/DoD RRW POG was tasked to oversee a laboratory design competition for a RRW warhead with FPU goal of FY 2012. The POG assessed the technical feasibility including certification without nuclear testing, design definition, manufacturing, and an initial cost assessment to determine whether the proposed candidates met the RRW study objectives and requirements. The POG presented the RRW study results to the NWC in November 2006 and the NWC decided that the RRW for submarine-launched ballistic missiles is feasible and should proceed to complete a Phase 2A design definition and cost study. In addition, the NWC determined that the RRW is to be adopted as the strategy for maintaining a long term safe, secure and reliable nuclear deterrent and as such also directed the initiation of a conceptual study for an additional RRW design. The next steps include detailed design and preliminary cost estimates of the RRW to confirm that the RRW design provides surety enhancements, can be certified without nuclear testing, is cost-effective, and will support both stockpile and infrastructure transformation. Once this acquisition planning is completed and if the NWC decides to proceed to engineering and production development, outyear funding (FY 2009 – FY 2012) to support an executable program will be submitted.
529:, H.R. 4986, Section 3111, forbids the expenditure of funds for the RRW program beyond Phase 2A; in effect, this prevents the RRW program from going forward without explicit Congressional authorization. Section 3121 Subsection 1 requires the study of the reuse of previously manufactured plutonium cores in any RRW warheads, so as to avoid the manufacture of additional plutonium cores. Section 3124 reaffirms the commitment of the U.S. to the 169:
unexpected contingencies as a key program driver. However, Congress has rejected the notion that the RRW is needed to meet new military requirements. In providing funds for 2006, the Appropriations Committee specified, "any weapons design under the RRW program must stay within the military requirements of the existing deployed stockpile and any new weapon design must stay within the design parameters validated by past nuclear tests".
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The increase funds the startup of activities in support of a NWC decision to have RRW proceed to engineering and production development. Activities include design, engineering and certification work such as finalization of requirements, material studies, technology demonstrations, detailed design and
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The RRW program has not to date publicly announced that it has developed any new nuclear weapon designs which are intended to be placed into production. Presumably, once that occurs, the weapons will receive numbers in the US warhead designation sequence, which currently runs from the Mark 1 nuclear
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The NWC approved the RRW Feasibility Study that began in May 2005 and completed in November 2006. The goal of the RRW study was to identify designs that will sustain long term confidence in a safe, secure and reliable stockpile and enable transformation to a responsive nuclear weapon infrastructure.
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Opponents of the RRW program believe it has nothing to do with making US weapons safer or more reliable, but is merely an excuse for designing new weapons and maintaining jobs at the weapons laboratories. They note that the Secretaries of Defense and Energy have certified that the existing nuclear
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phase 2 = competitive feasibility study; phase 2A = design definition and cost study by the lab to which DOE awarded the project; phase 3 = development engineering (at beginning of this phase warhead is assigned a #); phase 4 = production engineering; phase 5 = first production; phase 6 = quantity
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Critics maintain that this innocuous-sounding program could significantly damage US national security. Critics believe an expansive RRW program would anger US allies as well as hostile nations. They worry it would disrupt the global cooperation in nonproliferation that is vital to diplomacy with
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NNSA officials believe the program is needed to maintain nuclear weapons expertise in order to rapidly adapt, repair, or modify existing weapons or develop new weapons as requirements evolve. They see the ability to adapt to changing military needs rather than maintain additional forces for
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The concept underlying the RRW program is that the US weapons laboratories can design new nuclear weapons that are highly reliable and easy and safe to manufacture, monitor, and test. If that proves to be possible, designers could adapt a common set of core design components to various use
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warhead replacement as early as 1991. The W89 design was already equipped with all then-current safety features, including insensitive high explosives, fire-resistant pits, and advanced detonator safety systems. The W89 was also reportedly designed using recycled pits from the earlier
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The next-generation warheads will be larger and more stable than the existing ones but slightly less powerful, according to government officials. They might contain "use controls" that would enable the military to disable the weapons by remote control if they are stolen by
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has ceased in the United States, and new warhead development has been significantly reduced. As a result, the need for high technical performance of warheads has decreased considerably, and the need for a longer-lasting and reliable stockpile has taken a high priority.
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Prior nuclear weapons produced by the U.S. had historically become extremely compact, low weight, highly integrated, and low-margin designs which used exotic materials. In many cases the components were toxic and/or unstable. A number of older US designs used
558:, "It takes an extraordinary flight of imagination to postulate a modern new arsenal composed of such untested designs that would be more reliable, safe and effective than the current U.S. arsenal based on more than 1,000 tests since 1945". 247:
However, the full SEAB disavowed the Task Force's recommendations regarding the RRW, because the Task Force did not consider the program's potentially adverse impacts on U.S. nonproliferation objectives, which were beyond its expertise.
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Produce new weapons with the full spectrum of security and use control safety features available today, some of which are intrinsic to the basic design of a weapon and cannot possibly be retrofitted into the design of an existing weapon
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The FY08 RRW budget therefore indicates that one of the RRW designs has been approved and is entering the design definition and cost study phase. The document does not state which of the RRW designs has been selected.
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Historically, the weapon's nuclear series identification is assigned at the entrance to phase 3, and if the design proceeds forwards to complete phase 2 and enter phase 3 this can be expected in 1–2 years.
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One of the selection reasons given was that the LLNL proposed design was more closely tied to historical underground tested warhead designs. It was described by Thomas P. D'Agostino, acting head of the
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In an April 15, 2006, article by Walter Pincus in the Washington Post, Linton F. Brooks, administrator of the US National Nuclear Safety Administration, the US nuclear weapon design agency within the
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weapons stockpile is safe and reliable in each of the last nine years. The existing stockpile was extensively tested before the US entered the moratorium on nuclear weapons tests. According to
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has been a major topic of research at the weapons laboratories in recent decades. Though many at the labs still insist on scientific uncertainty on the question, a study commissioned by the
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U.S. Congress. House. Making Appropriations for the Energy and Water Development for the Fiscal Year Ending September 30, 2006, and for Other Purposes. H.Rept. 109-275. p. 159.
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On December 1, 2006, the NNSA announced that it had decided to move forwards with the RRW program after analyzing the initial LLNL and LANL RRW proposals. At that time,
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The W89 warhead design was a 13.3-inch-diameter (340 mm) by 40.8-inch-long (1,040 mm) weapon, with a weight of 324 pounds (147 kg) and yield of 200
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According to a Task Force of the Secretary of Energy's Advisory Board (SEAB), the RRW program and weapon designs should have the following characteristics:
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concurrent engineering with the production plants, and modeling, simulation and analysis in support of certification without additional nuclear testing.
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in January 1988. The lead designer, Bruce Goodwin, referred to the primary as the "SKUA9" design which he said had been tested a number of times.
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design and bomb family that was intended to be simple, reliable and to provide a long-lasting, low-maintenance future nuclear force for the
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layers with another material, and increased performance margins throughout the design, possibly including more fissile material in the
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REPORT OF THE SPECIAL COMMITTEE OF THE ACADEMIC SENATE ON THE UNIVERSITY'S RELATIONS WITH THE DEPARTMENT OF ENERGY (DOE) LABORATORIES
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President Obama's 2009 Department of Energy budget calls for development work on the Reliable Replacement Warhead project to cease.
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weapons could conceivably be type-standardized and numbered prior to any RRW reaching that point, if the RNEP program does proceed.
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nuclear warhead, which was cancelled in the 1990s. RRW designs would presumably receive designations after that number, though new
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LLNL staff have previously hinted in the press that LLNL was considering a design entry based on the tested but never deployed
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have a credible lifetime of at least 100 years". The oldest pits currently in the US arsenal are still less than 50 years old.
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Based on prior weapons programs, the RRW should be assigned a numerical weapon designation when the design selection is made.
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production and stockpiling. Note: Projects entering phase 1 (concept study) and phase 7 (=retirement) have not been included.
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Comparable or improved levels of reliability to existing designs, using larger margins and simpler components (3.1.5)
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Highs Explosives in Stockpile Surveillance Indicate Constancy. Science and Technology Review. Dec. 1996.
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Report to Congress: Assessment of the Safety of US Nuclear Weapons and Related Nuclear Test Requirements
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layers was a major health hazard to bomb manufacturer and maintenance staff. The long term stability of
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DEFENSE NUCLEAR FACILITIES SAFETY BOARD - Pantex Plant Activity Report for Week Ending January 16, 2004
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Funding is listed as $ 25 million for FY 2006, $ 28 million for FY 2007, and $ 89 million for FY 2008.
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to provide the temperature resistance. The W89 warhead was test fired in the 1980s. It had entered
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The article confirmed prior descriptions of the RRW, describing the weapons in the following terms:
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Designs which can be designed and certified without necessarily undergoing nuclear testing (3.1.7)
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An Assessment of US Nuclear Weapons and related Nuclear Test requirements: a post-Bush analysis
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metal, which may lose strength, crack, or otherwise degrade over time is also a concern. (See
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types which degraded over time, some of which became dangerously unstable in short lifetimes (
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and encourages the mutual reduction in armament of the U.S. and Russia through negotiation.
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Consolidation of many nuclear weapon production and maintenance functions to one site (4.1)
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requirements, such as different sized missile warheads, different nuclear bomb types, etc.
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The design is intended for first production unit (FPU) delivery by the end of 2012.
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United States Nuclear Weapons Program: The Role of the Reliable Replacement Warhead
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and to controlling clandestine trafficking in nuclear materials and equipment.
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According to the FY 2008 NNSA budget (pp 88), the RRW program is described as:
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Designs which trade off higher weight and larger volume to maximise: (3.1.4)
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Modifications for the RRW design would probably have included replacing
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warhead design may have been the basis for the winning LLNL RRW design.
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RRW design had been selected for the initial RRW production version.
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RRW design had been selected for the initial RRW production version.
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Be capable of conducting an underground nuclear test within 18 months
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had not selected which of the two designs to proceed forwards with.
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Support an adaptable 1,700-2,200 weapon sustained force level (3.1)
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development engineering and was assigned the numerical designation
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In 2008, Congress denied funding for the program, and in 2009 the
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University of California 1989 nuclear weapons labs status report
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Modularity (primaries, secondaries, non-nuclear) across systems
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Congressional Research Service, updated February 8, 2007, via
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Produce all new weapons using Insensitive High Explosive (see
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Renovation of the nuclear weapon arsenal of the United States
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Resolve an issue with the weapons stockpile within 12 months
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technical definition and cost study in November, 1986, and
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http://www.nukewatch.org/facts/nwd/JASON_ReportPuAging.pdf
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Maximizing component reuse and minimizing life-cycle costs
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Relatives of 3 Killed in Blast At Nuclear Plant Lose Suit
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National Defense Authorization Act for Fiscal Year 2008
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Nuclear Weapons Officials Agree to Pursue RRW Strategy
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Most experts believe that the insensitive explosives (
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in 2004, it became a centerpiece of the plans of the
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National Energy Research Scientific Computing Center
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Secretary of Energy Advisory Board (July 13, 2005).
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from Oct 3, 1981 New York Times, Accessed 2006-05-03
531:Treaty on the Non-Proliferation of Nuclear Weapons 220:Ease of maintenance, surveillance, and disposition 1453: 909:Principles of Nuclear Weapons Security and Safety 2330: 768:Design Selected for Reliable Replacement Warhead 182:Adapt a weapon to a new requirement in 18 months 763: 761: 1021:Editorial, "Busywork for Nuclear Scientists", 513:On March 2, 2007, the NNSA announced that the 284:On March 2, 2007, the NNSA announced that the 43:(NNSA) to remake the nuclear weapons complex. 1439: 1125: 188:Be ready for full production within 48 months 1167:National Atmospheric Release Advisory Center 999: 997: 961: 959: 758: 544: 481:As defined in an earlier UC report, nuclear 303:design. This warhead had been proposed as a 152:group concluded in November 2006 that "most 859:"Special Report: New Nukes Are Good Nukes?" 1446: 1432: 1132: 1118: 802: 800: 649:LLNL explosives accident training web page 994: 956: 637:Explosives section in nuclear weapons FAQ 50:called for work on the program to cease. 693:http://www.llnl.gov/str/pdfs/12_96.2.pdf 294:National Nuclear Security Administration 271: 146:National Nuclear Security Administration 41:National Nuclear Security Administration 812: 797: 217:Inexpensive manufacture and disassembly 2344:Lawrence Livermore National Laboratory 2331: 1408:Sustained Spheromak Physics Experiment 1141:Lawrence Livermore National Laboratory 1106:, July 6, 2006 (subscription required) 1003: 924: 780:Govt. Picks Design for Nuclear Warhead 706:group, (20 November 2006), online at 515:Lawrence Livermore National Laboratory 414:Lawrence Livermore National Laboratory 351:as its main explosive ingredient (see 286:Lawrence Livermore National Laboratory 2349:Nuclear warheads of the United States 1427: 1113: 980:, Nov 21, 1989, accessed Feb 11, 2007 343:Insensitive and fire-resistant LX-17 214:Certification without nuclear testing 953:, Dec 1, 2006, accessed Feb 11, 2007 770:, NNSA Press release, March 2, 2007. 312:nuclear weapon program, recoated in 185:Design a new weapon within 36 months 1814:Tactical Atomic Demolition Munition 625:Warhead Accidents at Banthebomb.org 393:Teller-Ulam design: Basic principle 13: 2339:Nuclear bombs of the United States 1808:Special Atomic Demolition Munition 831:Pit Tubes and Pit Re-Use at Pantex 410:United States Department of Energy 372:detonation chain safety mechanisms 267: 14: 2360: 1802:Medium Atomic Demolition Munition 1095:Federation of American Scientists 1042: 880:at the Nuclear Weapon Archive at 720:Statement of Thomas P. D’Agostino 613:W68 warhead at globalsecurity.org 347:, a type of high explosive using 1100:"Nuclear weapons: The next nuke" 925:Pincus, Walter (15 April 2006). 562:emerging nuclear powers such as 387:and a thicker radiation case or 1028: 1015: 1004:Civiak, Robert (January 2006). 983: 971: 918: 902: 899:website, accessed March 5, 2007 886: 871: 851: 840: 824: 785: 773: 733: 724: 1085:Congressional Research Service 835:Plutonium: the last Five Years 782:, NY Times / AP, March 2, 2007 713: 697: 685: 666: 654: 642: 630: 618: 606: 437:NNSA's Nuclear Weapons Council 418:Los Alamos National Laboratory 27:) was a proposed new American 1: 1455:United States nuclear devices 792:Scientists Dream Up New Nukes 600: 140:of the weapons suffered from 53: 2166:Reliable Replacement Warhead 1398:Laser Inertial Fusion Energy 1307:Reliable Replacement Warhead 1059:Reliable Replacement Warhead 467:Reliable Replacement Warhead 132:The question of whether the 21:Reliable Replacement Warhead 7: 1393:Inertial confinement fusion 1155:Mirror Fusion Test Facility 1077:Council for a Livable World 911:, Carey Sublette, 1997, at 747:. U.S. Department of Energy 679:September 23, 2006, at the 573: 10: 2365: 1177:National Ignition Facility 398: 262:RNEP nuclear bunker buster 159: 16:Proposed US nuclear weapon 2300: 2259: 2232: 2195: 2184: 1963: 1947: 1836: 1827: 1775: 1712: 1681: 1570: 1474: 1461: 1380: 1359: 1279: 1233: 1226: 1185: 1147: 915:, accessed March 11, 2007 545:Criticisms of the program 1302:Micropower impulse radar 1160:Tandem Mirror Experiment 1068:DOE argument for the RRW 913:nuclearweaponarchive.org 897:nuclearweaponarchive.org 882:nuclearweaponarchive.org 345:Polymer-bonded explosive 202:Plastic bonded explosive 129:for technical context.) 1087:, updated March 9, 2006 1025:(15 January 2007): A18. 968:, accessed Feb 11, 2007 893:Permissive Action Links 590:List of nuclear weapons 536: 520: 442: 403: 134:plutonium-gallium alloy 365:Permissive Action Link 281: 123:Nuclear weapons design 37:United States Congress 1403:Stockpile stewardship 1035:Drell_Goodby_fnl.indd 585:Nuclear weapon design 370:Strong link weak link 353:Insensitive munitions 275: 966:the 2008 NNSA budget 675:Accessed 2006-05-03 48:Obama administration 35:. Initiated by the 1102:By Geoff Brumfiel, 1011:. Tri-Valley CAREs. 864:Scientific American 651:Accessed 2006-05-03 639:Accessed 2006-05-03 627:Accessed 2006-05-03 615:Accessed 2006-05-03 483:weapons engineering 148:to the independent 1063:globalsecurity.org 990:www.whitehouse.gov 359:Fire-resistant pit 282: 234:Lower cost (3.1.6) 127:Teller-Ulam design 2326: 2325: 2255: 2254: 2180: 2179: 1823: 1822: 1777:Atomic demolition 1421: 1420: 1355: 1354: 1327:Slapper detonator 1292:LLNL RISE process 1198:ASCI Blue Pacific 381:neutron reflector 333:kilotonnes of TNT 115:neutron reflector 109:and highly toxic 64:nuclear arms race 2356: 2193: 2192: 1834: 1833: 1472: 1471: 1448: 1441: 1434: 1425: 1424: 1231: 1230: 1134: 1127: 1120: 1111: 1110: 1037: 1032: 1026: 1019: 1013: 1012: 1010: 1001: 992: 987: 981: 975: 969: 963: 954: 948: 942: 941: 939: 938: 922: 916: 906: 900: 890: 884: 875: 869: 868: 855: 849: 844: 838: 828: 822: 816: 810: 804: 795: 789: 783: 777: 771: 765: 756: 755: 753: 752: 746: 737: 731: 728: 722: 717: 711: 701: 695: 689: 683: 670: 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Index

nuclear warhead
United States
United States Congress
National Nuclear Security Administration
Obama administration
Cold War
nuclear arms race
Soviet Union
nuclear testing
high explosive
PBX 9404
LX-09
PBX 9502
LX-17
beryllium
beryllium oxide
neutron reflector
plutonium
Nuclear weapons design
Teller-Ulam design
plutonium-gallium alloy
cores
aging
National Nuclear Security Administration
JASON
plutonium pits
TATB
Plastic bonded explosive
Little Boy
W91

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