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Nuclear weapons design means the physical, chemical, and engineering arrangements that cause the physics package of a nuclear weapon to detonate. There
Nuclear_weapon_design
Category of U.S. top secret classified data
Critical Nuclear Weapon Design Information (CNWDI, often pronounced SIN-widdy or SIN-wuh-dee) is a U.S. Department of Defense (DoD) category of Top Secret
Critical Nuclear Weapon Design Information
Critical_Nuclear_Weapon_Design_Information
Energy released in nuclear weapons explosions
yield of a nuclear weapon is the amount of energy released such as blast, thermal, and nuclear radiation, when that particular nuclear weapon is detonated
Nuclear_weapon_yield
Multi-stage fusion-fission nuclear weapon
thermonuclear weapon, fusion weapon or hydrogen bomb (H-bomb) is a second-generation nuclear weapon, using nuclear fusion. The most destructive weapons ever created
Thermonuclear_weapon
History of technical design of modern hydrogen bombs
Teller-Ulam design with the very high-yield Ivy Mike test in 1952. The design was independently devised and then tested by teams of nuclear weapons scientists
History of the Teller–Ulam design
History_of_the_Teller–Ulam_design
Core of a nuclear implosion weapon
In nuclear weapon design, the pit is the core of an implosion nuclear weapon, consisting of fissile material and any neutron reflector or tamper bonded
Pit_(nuclear_weapon)
possess nuclear weapons, though only eight formally acknowledge possessing them. In order of first successful nuclear test, the world's nine nuclear-armed
List of states with nuclear weapons
List_of_states_with_nuclear_weapons
Nuclear weapon component
In a nuclear weapon, a tamper is an optional layer of dense material surrounding the fissile material. It is used in nuclear weapon design to reduce the
Tamper_(nuclear_weapon)
Explosion from fission or fusion reaction
and a pure fusion weapon remains a hypothetical device. Nuclear explosions are used in nuclear weapons and nuclear testing. Nuclear explosions are extremely
Nuclear_explosion
Designing how data is held in a database
Database design is the organization of data according to a database model. The designer determines what data must be stored and how the data elements interrelate
Database_design
Fission-based nuclear weapon
Gun-type fission weapons are fission-based nuclear weapons whose design assembles their fissile material into a supercritical mass by the use of the "gun"
Gun-type_fission_weapon
Nuclear weapon designed for use on a battlefield
A tactical nuclear weapon (TNW) or non-strategic nuclear weapon (NSNW) is a nuclear weapon that is designed to be used on a battlefield in military situations
Tactical_nuclear_weapon
Earth-penetrating nuclear weapon
component of the weapon is designed to penetrate soil, rock, or concrete to deliver a nuclear warhead to an underground target. These weapons would be used
Nuclear_bunker_buster
Nuclear weapon design
The Mark 5 nuclear bomb and W5 nuclear warhead were a common core American nuclear weapon design, designed in the early 1950s and which saw service from
Mark_5_nuclear_bomb
Spread of nuclear weapons
Nuclear proliferation is the spread of nuclear weapons to additional countries, particularly those not recognized as nuclear-weapon states by the Treaty
Nuclear_proliferation
States holds the second-largest arsenal of nuclear weapons (after the Russian Federation) among the nine nuclear-armed countries. Under the Manhattan Project
Nuclear weapons of the United States
Nuclear_weapons_of_the_United_States
of nuclear weapons is the world's third-largest, estimated at 620 nuclear warheads as of 2026[update]. China was the fifth country to develop nuclear weapons
Nuclear_weapons_of_China
World's atomic warhead designs, 1945–present
are known to possess a nuclear triad, being capable to deliver nuclear weapons by land, sea and air. American nuclear weapons of all types – bombs, warheads
List_of_nuclear_weapons
Type of nuclear weapon
fission weapon is a type of nuclear weapon that makes use of a small amount of fusion fuel to increase the rate, and thus yield, of a nuclear fission
Boosted_fission_weapon
ever acquire a nuclear weapons capability, and the only state to relinquish them. South Africa's nuclear weapons doctrine was designed for political leverage
South Africa and weapons of mass destruction
South_Africa_and_weapons_of_mass_destruction
the former Soviet nuclear weapons, delivery system, and significant knowledge of its design and production. While all these weapons were located on Ukrainian
Ukraine and weapons of mass destruction
Ukraine_and_weapons_of_mass_destruction
Type of explosive arms
Nuclear weapons delivery is the technology and systems used to place a nuclear weapon at the position of detonation, on or near its target. All nine nuclear
Nuclear_weapons_delivery
Atomic bomb dropped on Hiroshima
perceived simplicity, the gun-type nuclear weapon design was the first approach pursued by the scientists working on bomb design during the Manhattan Project
Little_Boy
American nuclear bomb design
yield fission bomb produced by the US. The Mark 18 had a design yield of 500 kilotons. Nuclear weapon designer Ted Taylor was the lead designer for the Mark
Mark_18_nuclear_bomb
Smallest amount of fissile material needed to sustain a nuclear reaction
is an important parameter of a nuclear reactor core or nuclear weapon. The concept is important in nuclear weapon design. Critical size is the minimum
Critical_mass
Legally binding international agreement to prohibit nuclear weapons
The Treaty on the Prohibition of Nuclear Weapons (TPNW), or the Nuclear Weapon Ban Treaty, is the first legally binding international agreement to
Treaty on the Prohibition of Nuclear Weapons
Treaty_on_the_Prohibition_of_Nuclear_Weapons
Since their first use in warfare in August 1945, nuclear weapons and their potential effects have been a recurring motif in popular culture, to the extent
Nuclear weapons in popular culture
Nuclear_weapons_in_popular_culture
to possess nuclear weapons. Estimates of Israel's stockpile range from 90 to 400 warheads, and the country is believed to possess a nuclear triad of delivery
Israel_and_nuclear_weapons
conventional explosives. In most cases, the energy released from a nuclear weapon detonated within the lower atmosphere can be approximately divided into
Effects_of_nuclear_explosions
Controlled detonation of nuclear weapons for scientific or political purposes
Nuclear weapons tests are experiments carried out to determine the performance of nuclear weapons and the effects of their explosion. Over 2,000 nuclear
Nuclear_weapons_testing
Codename for 1950s proposed American nuclear weapon
massive nuclear bombs planned for testing by the University of California Radiation Laboratory, Livermore Branch as part of a classified American weapons project
Sundial_(weapon)
Soviet Union program to develop nuclear weapons during and after World War II
Soviet Union to develop nuclear weapons during and after World War II. Physicist Georgy Flyorov, suspecting a Western Allied nuclear program, urged Stalin
Soviet_atomic_bomb_project
Nuclear bomb
nuclear weapon featuring a two-stage radiation implosion design. The B61 is of the variable yield ("dial-a-yield" in informal military jargon) design
B61_nuclear_bomb
1949 Soviet nuclear bomb test
romanized: Pyérvaya mólniya, IPA: [ˈpʲervəjə ˈmolnʲɪjə]), was the first nuclear weapons test that was conducted by the Soviet Union. It was detonated on 29 August
RDS-1
test nuclear weapons. The UK is one of nine nuclear-armed states, and one of five recognized by the Treaty on the Non-Proliferation of Nuclear Weapons. As
Nuclear weapons of the United Kingdom
Nuclear_weapons_of_the_United_Kingdom
Idealised cavity in radiative equilibrium
targets, and generating thermal radiation waves. They may also be used in nuclear weapon designs. One approach to inertial confinement fusion is the indirect
Hohlraum
Nuclear bomb
the NATO nuclear weapons sharing program, American B28s also equipped six Europe-based Canadian CF-104 squadrons known as the RCAF Nuclear Strike Force
B28_nuclear_bomb
of the five nuclear-weapon states recognized by the Non-Proliferation Treaty (NPT). As of 2025[update], the stockpile country's nuclear forces, the Force
France and weapons of mass destruction
France_and_weapons_of_mass_destruction
American nuclear recoilless gun
Crockett Weapon System was a tactical nuclear recoilless smoothbore gun for firing the M388 nuclear projectile, armed with the W54 nuclear warhead, that
Davy Crockett (nuclear device)
Davy_Crockett_(nuclear_device)
possess nuclear weapons. Pakistan is not party to the Nuclear Non-Proliferation Treaty. Pakistan's arsenal is estimated at 170 nuclear weapons as of 2025
Pakistan and weapons of mass destruction
Pakistan_and_weapons_of_mass_destruction
Nuclear weapon that can be transported in a suitcase
suitcase nuclear device (also suitcase nuke, suitcase bomb, backpack nuke, snuke, mini-nuke, and pocket nuke) is a tactical nuclear weapon that is portable
Suitcase_nuclear_device
American thermonuclear gravity bomb
The B83 nuclear bomb is an unguided variable-yield thermonuclear weapon developed by the United States during the late 1970s. Designed by Lawrence Livermore
B83_nuclear_bomb
Low-yield thermonuclear weapon
officially defined as a type of enhanced radiation weapon (ERW), is a low-yield thermonuclear weapon designed to maximize lethal neutron radiation in the immediate
Neutron_bomb
Material used in US nuclear weapons
interstage material in a nuclear warhead; i.e., a material designed to become a superheated plasma following the detonation of the weapon's fission stage, the
Fogbank
Hypothetical nuclear weapon
A pure fusion weapon is a hypothetical hydrogen bomb design that does not need a fission "primary" explosive to ignite the fusion of deuterium and tritium
Pure_fusion_weapon
American physicist and nuclear weapons designer (1929–2011)
nuclear bomb and the W84 thermonuclear warheads. For his work on nuclear weapon design, he was awarded the E. O. Lawrence Award in 1973 (currently awarded
Seymour_Sack
First British operational high-yield strategic nuclear weapon warhead
Yellow Sun was the first British operational high-yield strategic nuclear weapon warhead. The name refers only to the outer casing; the warhead (or physics
Yellow_Sun_(nuclear_weapon)
Construction project delivery system
Design–build (or design/build or design and build, and abbreviated D–B, D/B or D&B accordingly), also known as alternative delivery, is a project delivery
Design–build
Neutron source used in some nuclear weapons
producing a burst of neutrons on activation. It is a crucial part of some nuclear weapons, as its role is to "kick-start" the chain reaction at the optimal moment
Modulated_neutron_initiator
Type of nuclear weapon
bomb is a nuclear weapon designed to function as a radiological weapon by producing larger quantities of radioactive fallout than unsalted nuclear arms. This
Salted_bomb
Department of Defense. Retrieved 2025-02-06. "Tsar Bomba: The Most Powerful Nuclear Weapon Ever Built". HowStuffWorks. 1970-01-01. Retrieved 2025-02-06. "Manhattan
List_of_bombs
U.S. atomic bomb type used at Nagasaki, 1945
known as Mark III) was the design of the nuclear weapon the United States used for seven of the first eight nuclear weapons ever detonated in history.
Fat_Man
Espionage related to the creation of nuclear weapons
secrets, all nations with nuclear weapons have strict restrictions against the giving of information relating to nuclear weapon design, stockpiles, delivery
Nuclear_espionage
Sound track creation
Sound design is the art and practice of creating auditory elements of media. It involves specifying, acquiring and creating audio using production techniques
Sound_design
American thermonuclear bomb design
in Atwater, California. List of nuclear weapons Nuclear weapon design Teller-Ulam design Mark 17 nuclear bomb Crompton, J; Kohut, F A (August 1958). Aircraft
Mark_24_nuclear_bomb
Nuclear explosion with much less than expected yield
occurs when the detonation of a device for creating a nuclear explosion (such as a nuclear weapon) grossly fails to meet its expected yield. The device
Fizzle_(nuclear_explosion)
US 1960s-era study into nuclear weapons to create beams of plasma
Project Casaba-Howitzer was a 1960s-era study into the use of nuclear weapons as the drivers for intense beams of plasma for use in space warfare. The
Casaba-Howitzer
Nuclear weapons used on strategic targets outside of battlefields
A strategic nuclear weapon (SNW) is a nuclear weapon that is designed to be used on targets often in settled territory far from the battlefield as part
Strategic_nuclear_weapon
Process of matching design factors for corrugated fiberboard boxes
Corrugated box design is the process of matching design factors for corrugated fiberboard (sometimes called corrugated cardboard) or corrugated plastic
Corrugated_box_design
Reverse-engineering without infringing copyright
Clean-room design (also known as the Chinese wall technique) is the method of copying a design by reverse engineering and then recreating it without infringing
Clean-room_design
American high-yield thermonuclear weapon
was a thermonuclear weapon deployed by the United States Strategic Air Command in the early 1960s. It was the most powerful nuclear bomb ever developed
B41_nuclear_bomb
Shaped charge used in nuclear weapons
An explosive lens—as used, for example, in nuclear weapons—is a highly specialized shaped charge. In general, it is a device composed of several explosive
Explosive_lens
Uranium processed to increase the percentage of uranium-235
neutrons. Enriched uranium is used in both civil nuclear power generation and military nuclear weapons. Low-enriched uranium (LEU), containing less than
Enriched_uranium
Crash of US Air Force bomber with nuclear warheads
safeguards meant to prevent that from occurring. One of its nuclear bombs was judged by nuclear weapons engineers at the time to have been only one safety switch
1961_Goldsboro_B-52_crash
Cold War project to demonstrate the ease of building nuclear weapons
summary, lab weapons experts apparently judged that the team had come up with a credible design for a two-point implosion–style nuclear weapon. It was also
Nth_Country_Experiment
1996 treaty banning all nuclear weapons testing
The Comprehensive Nuclear-Test-Ban Treaty (CTBT) is a multilateral treaty to ban nuclear weapons test explosions and any other nuclear explosions, for both
Comprehensive Nuclear-Test-Ban Treaty
Comprehensive_Nuclear-Test-Ban_Treaty
Approach for designing software
Design by contract (DbC), also known as contract programming, programming by contract and design-by-contract programming, is an approach for designing
Design_by_contract
International treaty
nuclear weapons and weapons technology, to promote cooperation in the peaceful uses of nuclear energy, and to further the goal of achieving nuclear disarmament
Treaty on the Non-Proliferation of Nuclear Weapons
Treaty_on_the_Non-Proliferation_of_Nuclear_Weapons
Access control device for nuclear weapons
control security device for nuclear weapons. Its purpose is to prevent unauthorized arming or detonation of a nuclear weapon. The United States federal
Permissive_action_link
develop nuclear weapons. As of 2026[update], India is estimated to possess 190 nuclear weapons. India previously developed chemical weapons, and is a
India and weapons of mass destruction
India_and_weapons_of_mass_destruction
Aspect of nuclear deterrence strategy
Nuclear sharing is a concept in deterrence theory in which a nuclear-armed country deploys nuclear weapons on the territory of a country that does not
Nuclear_sharing
made during the 1930s, the United Kingdom began the world's first nuclear weapons research project, codenamed Tube Alloys, in 1941, during World War
History_of_nuclear_weapons
Aspect of Japan's military history
biological weapons (CBW) during the Second Sino-Japanese War as part of Japanese war crimes. Japan is the only country ever attacked with nuclear weapons, by
Japan and weapons of mass destruction
Japan_and_weapons_of_mass_destruction
Air-dropped nuclear fission weapon
The Mark 4 nuclear bomb was an American implosion-type nuclear bomb based on the earlier Mark 3 Fat Man design, used in the Trinity test and the bombing
Mark_4_nuclear_bomb
U.S. government classification system
DATA. Critical Nuclear Weapon Design Information (CNWDI, colloquially pronounced "Sin-Widdy") reveals the theory of operation or design of the components
Classified information in the United States
Classified_information_in_the_United_States
Pseudoscientific argument for the existence of God
of nuclear forces, electromagnetism, and gravity between fundamental particles, as well as the ratios of masses of such particles. Intelligent design proponent
Intelligent_design
Field of economics and game theory
Mechanism design (sometimes implementation theory or institution design) is a branch of economics and game theory. It studies how to construct rules—called
Mechanism_design
American theoretical physicist (1904–1967)
neutron stars and black holes. In 1941, Oppenheimer was briefed about nuclear weapon design by Australian physicist Mark Oliphant. In 1942, Oppenheimer was
J._Robert_Oppenheimer
Act of eliminating nuclear weapons
Nuclear disarmament is the act of reducing or eliminating nuclear weapons. Its end state can also be a nuclear-weapons-free world, in which nuclear weapons
Nuclear_disarmament
Residual radioactive material following a nuclear blast
areas impacted by the more immediate effects of nuclear weapons. Atmospheric and underwater nuclear weapons testing, which widely disperses fallout, was
Nuclear_fallout
Processes by which design concepts are developed
Design thinking refers to the set of cognitive, strategic and practical procedures used by designers in the process of designing, and to the body of knowledge
Design_thinking
State ability to develop nuclear weapons
develop nuclear weapons, without having actually yet done so. Nuclear latency can be achieved with solely peaceful intentions, but in some cases nuclear latency
Nuclear_latency
Theoretical illicit nuclear weapon
Improvised nuclear device (IND) is a theoretical illicit nuclear weapon bought, stolen, or otherwise originating from a nuclear state, or a weapon fabricated
Improvised_nuclear_device
Creation and maintenance of websites
graphic design; user interface design (UI design); authoring, including standardised code and proprietary software; user experience design (UX design); and
Web_design
Process of planning software solutions
Software design is the process of conceptualizing how a software system will work before it is implemented or modified. Software design also refers to
Software_design
North Korea has the world's smallest stockpile of nuclear weapons, with an estimated 60 warheads and production of fissile material for six to seven warheads
North Korea and weapons of mass destruction
North_Korea_and_weapons_of_mass_destruction
Nuclear material pure enough to be used for nuclear weapons
Weapons-grade nuclear material is any fissionable nuclear material that is pure enough to make a nuclear weapon and has properties that make it particularly
Weapons-grade nuclear material
Weapons-grade_nuclear_material
Styling, formatting and designing the layout of a book's contents
Book design is the graphic art of determining the visual and physical characteristics of a book. The design process begins after an author and editor finalize
Book_design
Most powerful nuclear weapon ever tested
Ivan or Vanya, internal designation "AN602") is the most powerful nuclear weapon or weapon of any kind ever constructed and tested. A project of the Soviet
Tsar_Bomba
Federation possesses the world's largest arsenal of nuclear weapons, consisting of 5,420 nuclear warheads, of which 1,794 have been deployed. It also
Russia and weapons of mass destruction
Russia_and_weapons_of_mass_destruction
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either nuclear fission (fission or atomic bomb) or
Nuclear_weapon
Detonator fired by electric current
generator, the initial source of fission neutrons. Nuclear weapon design – Implosion-type weapon Triggering sequence Slapper detonator (A further development
Exploding-bridgewire detonator
Exploding-bridgewire_detonator
Weapon that can kill many people or cause great damage
A weapon of mass destruction (WMD) is a biological, chemical, radiological, nuclear, or any other weapon that can kill or significantly harm many people
Weapon_of_mass_destruction
Experimental nuclear weapon
250 cm, 2,700 kg to 2,900 kg). The Mark 13 design used a 92-point nuclear implosion system (see Nuclear weapon design). A similar 92-point system was used in
Mark_13_nuclear_bomb
Nuclear weapons testing is the act of experimentally and deliberately firing one or more nuclear devices in a controlled manner pursuant to a military
List_of_nuclear_weapons_tests
U.S. Department of Energy security clearance level
of the DOE information at this level requires access to Critical Nuclear Weapon Design Information (CNWDI, pronounced "SIN-widee"). Such information bears
Q_clearance
Overall strategy utilized to carry out research
Research design refers to the overall strategy utilized to answer research questions. A research design typically outlines the theories and models underlying
Research_design
Interdisciplinary branch of design and fine arts
Graphic design is a profession, academic discipline and applied art that involves creating visual communications intended to transmit specific messages
Graphic_design
Legal category of US nuclear secrets
concerning (1) design, manufacture, or utilization of atomic weapons; (2) the production of special nuclear material; or (3) the use of special nuclear material
Restricted_Data
Design process
Inclusive design is a design process in which a product, service, or environment is designed to be usable for as many people as possible, particularly
Inclusive_design
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NUCLEAR WEAPON-DESIGN
NUCLEAR WEAPON-DESIGN
NUCLEAR WEAPON-DESIGN
NUCLEAR WEAPON-DESIGN
NUCLEAR WEAPON-DESIGN
NUCLEAR WEAPON-DESIGN
NUCLEAR WEAPON-DESIGN
NUCLEAR WEAPON-DESIGN
NUCLEAR WEAPON-DESIGN
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