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Longer titles found: Fissile Material Cut-off Treaty (view), International Panel on Fissile Materials (view)

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Critical mass (2,937 words) [view diff] exact match in snippet view article find links to article

In nuclear engineering, a critical mass is the smallest amount of fissile material needed for a sustained nuclear chain reaction. The critical mass of

insensitive plastic bonded explosive and a fire-resistant nuclear fissile material core or pit. The design was cancelled in September 1991 along with

of fission is thereby greatly increased such that much more of the fissile material is able to undergo fission before the core explosively disassembles

implosion-type Mark 12 which was lighter and used considerably less fissile material. List of nuclear weapons Mark 1 Little Boy nuclear bomb Mark 8 nuclear

usable fuel through nuclear transmutation, in tandem with the burnup of fissile material. TWRs differ from other kinds of fast-neutron and breeder reactors

larger mass of non-fissile material, in this case depleted uranium. Neutrons from fission in the core "breeds" new fissile material in the surrounding

length of time which is required to rearrange a subcritical mass of fissile material into a prompt critical mass. This is one of the three main requirements

landed 30 meters from the silo portal without detonating or leaking fissile material. Hydrazine may also be mixed with monomethyl hydrazine (MMH). Because

nuclear reactor. Experiments have been conducted with uranium-233 (the fissile material at the heart of the thorium fuel cycle). Neptunium-237 and some isotopes

unsuccessful as there were problems finding and paying for the necessary fissile material. There were four boats, launched 1954–1955: X51 Stickleback, launched

warhead used enriched uranium (code named oralloy) as its nuclear fissile material and could be used in two different yield configurations. This required

throughout the surrounding area, involve a partial fission reaction of the fissile material, or both. For practical purposes, a fizzle can still have considerable

criticality with a tamper (layer of dense material surrounding the fissile material). Still, the core was accidentally put into a critical configuration

used a 92-point implosion system and a composite uranium/plutonium fissile material core or pit. The Mark 5 core and W5 warhead were 39 in (990 mm) in

around India's limited uranium resources. Thorium itself is not a fissile material, and thus cannot undergo fission to produce energy. Instead, it must

fast reactor for being fissioned. While they can be transmuted into fissile material with thermal neutrons, some nuclides need as many as three successive

unpredictably in a number of ways: the high explosives that compress their fissile material can chemically degrade, their electronic components can suffer from

system. The Mini-Mag Orion system achieves propulsion by compressing fissile material in a magnetic field, a Z-pinch, until fission occurs. This fission

reduce the size, weight, and most importantly, reduce the amount of fissile material necessary for nuclear weapons, while increasing the destructive power

It was a compact implosion device containing plutonium-239 as its fissile material, and in its various versions and mods it had a yield of 10 to 1,000

U-238 blankets) it will produce more fissile material than it consumes. This is useful for providing fissile material for starting up other plants. Using

involves the unintended accumulation or arrangement of a critical mass of fissile material, for example enriched uranium or plutonium. Criticality accidents can

the weapon's main fuel, thus allowing more efficient use of scarce fissile material such as uranium-235 (235 U ) or plutonium-239 (239 Pu ). The first

(BeF2). It is both a nuclear reactor coolant and solvent for fertile or fissile material. It served both purposes in the Molten-Salt Reactor Experiment (MSRE)

calculate the behavior of nuclear chain reactions inside a mass of fissile material. Based on these calculations even an infinitely large mass of pure

thin-walled sphere was a commonly used design, which ensured that the fissile material remained sub-critical until imploded. The HEU sphere was then enclosed

metal tower. The burst of radiation was produced when a piston of fissile material was quickly inserted into and extracted from a cavity within the larger

military nuclear accidents. Civil radiation accidents not involving fissile material are listed at List of civilian radiation accidents. For a general discussion

contained the first calculations about the size of the critical mass of fissile material needed for an atomic bomb. It revealed that the amount required might

experimental prototype molten salt reactor (MSR) using U-233 fuel, the fissile material created by bombarding thorium with neutrons. The MSRE reactor, built

is the Belgian National Agency for Radioactive Waste and enriched Fissile Material. It is established by Belgian law since 1980. Belgoprocess is the industrial

FNR is such that a sub-critical assembly exists into which a rod of fissile material is inserted. Feedback and monitoring of the power level will keep the

operations was unlikely to succeed. Instead, the report proposed that all fissile material be owned by an international agency to be called the Atomic Development

natural uranium tamper layer, the bomb had over four critical masses of fissile material in the core, and was unsafe: the accidental detonation of even one

tristructural-isotropic (TRISO) particles. These TRISO particles consist of a fissile material (such as 235 U) surrounded by a ceramic coating of silicon carbide

NPCIL) Status 14 Operational Main parameters of the reactor core Fuel (fissile material) 235U (NU/SEU/LEU) Fuel state Solid Neutron energy spectrum Thermal

African nuclear weapon-related uranium enrichment, providing necessary fissile material during the 1970s. South Africa portal Switzerland portal Politics portal

cancelled prior to introduction into service, replaced by the much more fissile-material-efficient Mark 12 nuclear bomb implosion design. List of nuclear weapons

neutron flux through the use of a neutron amplifier, a thin film of fissile material surrounding the spallation source; the use of neutron amplification

fast breeder reactor, and can use both uranium and thorium to breed fissile material, as well as recycle processed high-level waste and plutonium. The reactor

that military submarines used at the time, utilizing uranium as the fissile material. Because the entire reactor would be replaced, Ford hypothesized that

internationally and effectively verifiable treaty banning the production of fissile material for nuclear weapons or other nuclear explosive devices in accordance

thorium itself is not fissile, it has to be "bred" first to obtain a fissile material, which can then be used in the same reactor that "bred" the 233 U or

that uses molten salt(s) as a coolant or as a solvent in which the fissile material is dissolved. Experimental salts using lithium can be formed that have

Fissile Material Storage Facility (FMSF). Looking at the administration building of the storage facility to include all the support facilities. Excavator

fissionable material under Russian control. The US provided "10,000 fissile material storage containers by the end of 1995 and a total of nearly 33,000

portion containing the fuel components Pit (nuclear weapon) or core, the fissile material in a nuclear weapon Semiconductor intellectual property core (IP core)

limit nuclear proliferation rely on the detection and control of the fissile material and the equipment needed to obtain it. A theory popular in the mid-1990s

continued development of fissile material production capabilities distinctly worrying. Particularly because fissile material availability has long been

bomb to be constructed with no fissile material inside (i.e. a pure fusion weapon); it is the control of the fissile material and the means for making it

Status Under development Main parameters of the reactor core Fuel (fissile material) 235U (LEU) Fuel state Solid Neutron energy spectrum Thermal Primary control method

of the nuclear regime to which debate over the disposal of leftover fissile material was the primary concern. Dwight Eisenhower's Atoms for Peace speech

a nuclear power reactor, there are two types of fuel. The first is fissile material, which splits when hit by neutrons, releasing a large amount of energy

significant proportion of total weapon yield, and compared to other fissile material U-238 is cheap and plentiful as a waste product from HEU manufacture

potentially fissile material against a reference sample, which under certain circumstances would label a warhead as containing fissile material when it doesn't

15500°E / 26.80361; 120.15500 Main parameters of the reactor core Fuel (fissile material) UO2 (initial stage) MOX (later stage) Neutron energy spectrum Fast

steam-filled cavity dug in granite. This led to the realization that the fissile material from the fission sections of the bombs, the "primaries", would accumulate

responsible for: overseeing the use of radioactive substances and fissile material, coordinating contingency plans against nuclear accidents and radioactive

experiments determine the quantity of fissile material required for criticality with a variety of fissile material compositions, densities, shapes, and

implosion-type nuclear weapon design, a sphere of plutonium, uranium, or other fissile material is imploded by a spherical arrangement of explosive charges. This decreases

drag in the transonic speed regime Supercritical mass, an amount of fissile material that will undergo a sustained nuclear chain reaction at an increasing

dead end design. And it consumed an enormous amount of very expensive fissile material". This is the thesis of a BBC documentary on the topic of the fire

principle) relaxed somewhat, which would permit assembly of additional fissile material in the core, as well as a radial-implosion assembly, which was much

Status Under development Main parameters of the reactor core Fuel (fissile material) Information missing Fuel state Solid Neutron energy spectrum Thermal

without refueling or reshuffling the fuel. Substantial amounts of usable fissile material remain in the EM2 core at the end of life. This material can be reused

nuclear weapons programmes, cease developing ballistic missiles and fissile material. All countries were urged to prohibit the export of equipment, materials

construction 10 planned Main parameters of the reactor core Fuel (fissile material) 235U (NU/SEU/LEU) Fuel state Solid Neutron energy spectrum Thermal

materials. They are used inside vessels and tanks containing solutions of fissile material, for example solutions of enriched uranyl nitrate. There they act as

UNSCR 1540 commitments. However it points out that many countries that fissile material cannot afford the funds and manpower needed to implement necessary

their predecessors, Blue Danube and Red Beard, they used HEU as a fissile material rather than plutonium, the reason being primarily economic. The cost

material for making a dirty bomb. Cactus Dome "AAAS". US Guards Kazakh Fissile Material from Theft, by Ellen Barry, The New York Times, 22 May 2011 "Jeffrey

separation of uranium in Oak Ridge, Tennessee, which produced the fissile material for the first atomic bomb. In 1949 he was elected an Honorary Fellow

with highly enriched uranium or weapons-grade plutonium Sphere of fissile material (pit) surrounded by explosive lenses Initial explosion produces imploding

Iran's overt nuclear facilities while alternative paths to obtain fissile material existed. Graham Allison, former United States Assistant Secretary of

project Status operational Main parameters of the reactor core Fuel (fissile material) 235U (LEU) Fuel state Solid Neutron energy spectrum Thermal Primary control method

RTG Status decommissioned Main parameters of the reactor core Fuel (fissile material) 235U Fuel state solid disks, UC 2 Neutron energy spectrum Fast

the effective neutron multiplication factor within an assembly of fissile material, in nuclear reactor theory Kerala Farmers Federation, an Indian organisation

Baluyevsky's extraordinary briefing implied that Iran had acquired its fissile material from another source so there was no reason for Russia not to complete

6122°E / 38.9602; 102.6122 Main parameters of the reactor core Fuel (fissile material) HALEU Fuel state Liquid Neutron energy spectrum Thermal Primary control method

Sverdlovsk Oblast, Russia Main parameters of the reactor core Fuel (fissile material) U+Pu nitride, MOX, or metal Fuel state Solid Neutron energy spectrum

such as Oppenheimer, simply thought that the existing stockpile of fissile material was better spent in attempting to develop a large arsenal of tactical

The Throes on Ameroafriasiana Fertile material, nuclides from which fissile material can be generated Fertile soil, soil that can support plant growth All

98056°E / -34.05167; 150.98056 Main parameters of the reactor core Fuel (fissile material) 235U Fuel state Solid Neutron energy spectrum Thermal Primary moderator

uranium on behalf of British Nuclear Fuels Limited. Transporting enough fissile material between them to produce 50–60 nuclear weapons, these ships, beginning

direct heating of a propellant gas by fission fragments generated by a fissile material. Ronen et al. demonstrate that 242mAm can maintain sustained nuclear

significantly more efficient in terms of explosive yield per unit mass of fissile material in the bomb, because compressed fissile materials react more rapidly

raising doubts once again. "The assurance of uninterrupted supply of fissile material uranium is the biggest question mark that has come. The other big question

used PBX 9404, an HMX based plastic bonded explosive to implode the fissile material in the primary stage. Newer models use TATB based PBX 9502, which is

foreign data by choosing the Gaseous diffusion method to produce the fissile material, a move that irked Pyotr Kapitsa who raised objections against this

third and last component, sufficient fissile material to produce a nuclear explosion. To make the fissile material, he needs to develop an ability to enrich

being loaded with more than the authorized amount 8 kg (18 lb) of fissile material, presenting the possible threat of a spontaneous nuclear reaction.

IV Status Design archived Main parameters of the reactor core Fuel (fissile material) Information missing Primary coolant Helium Reactor usage Power (thermal)

the caverns needed to contain the explosions and the accumulation of fissile material from exploded primaries, and began to wonder if these problems could

been produced by cyclotrons. There were many ways of arranging the fissile material into a critical mass. The simplest was shooting a "cylindrical plug"

in Aiken, South Carolina which was used to make vast quantities of fissile material for the United States nuclear arsenal. Blood Ties: The Life and Work

as the British used a different conventional explosive, and British fissile material was of a different composition of isotopes of plutonium. A new warhead

economic costs of developing nuclear power and the possibility of fissile material being diverted into nuclear weapons production.[citation needed] A

98417°W / 10.39750; -66.98417 Main parameters of the reactor core Fuel (fissile material) 235U Primary moderator Light water Primary coolant Water Reactor usage

system. The cadmium can be added as a metal to nitric acid solutions of fissile material; the corrosion of the cadmium in the acid will then generate cadmium

to examine ways to minimize the plutonium hazard without increasing fissile material requirements. The results of that study remain classified, but the

with ways of tracing nuclear material to the country that forged the fissile material: "After a nuclear bomb detonates, nuclear forensic cops would collect

are four circuits and 1,832 fuel elements in the reactor core. Total fissile material in the reactor is 163 tonnes. Overall responsibility for construction

nuclear research reactor Main parameters of the reactor core Fuel (fissile material) Information missing Primary coolant Light-water Reactor usage Primary

weapons and ensuring a reduction in nuclear weapons stockpiles and fissile material 1888 30 September 2009 15–0–0 Mandates peacekeeping missions to protect

These methods were used during the preparation of plutonium-239, the fissile material used in the construction of the atomic bomb for the Trinity nuclear

In order to release this energy rapidly, a certain amount of the fissile material must be very rapidly consolidated while being exposed to a neutron

Anarchy: Containing the Threat of Loose Russian Nuclear Weapons and Fissile Material. MIT Press. pp. 90–91. ISBN 978-0-262-51088-2. Retrieved 24 July 2011

Hussein had no major active weapons of mass destruction programs, had no fissile material and that biological weapons were almost non-existent, although he claimed

power generation (approx. 32 tonnes), meaning that India's domestic fissile material supply is more than enough to meet all needs for it strategic nuclear

nuclear reaction. Handl's experiments included the acquisition of fissile material from outside the country, a radiator suitable for transmutation, and

manpower and more electricity to operate. The cost of a kilogram of fissile material would therefore be much greater. On the other hand, while the alternative

development of the weapon design so that it was ready by the time sufficient fissile material became available: He stated that his best estimate is that the information

organizations from around the world that are committed to improving fissile material security and the prevention of nuclear terrorism. Since 2010, she organized

being mailed to Dunning at Columbia, was confirmed to be the isolated fissile material. When he was working in Rome, Fermi had discovered that collisions

warhead was never tested. It used a dangerously large quantity of fissile material – thought to be in excess of 70 kilograms (150 lb), and considerably

was held on 2 May, followed by a full dress rehearsal on 5 May. The fissile material was delivered by an RAF Hastings to Onslow, from whence it was collected

Dragon's Tail, a 1946 failed experiment to test the exact point at which fissile material could be made critical, after which hands-on criticality experiments

test, fizzled. Retested successfully with Franklin Prime, with more fissile material in the core and different explosives. Lassen June 5, 1957 11:45:00

Nuclear Fears - US and UK Diplomats Warn of Terrorists Getting Hold of Fissile Material and of Pakistan-India Nuclear Exchange". The Guardian. London. Retrieved

experiments never produced more than very small amounts of weaponizeable fissile material. The Board of Governors decided to not make a formal finding of noncompliance

ether extraction process to extract Uranium oxide, a precursor to the fissile material used in the first atom bombs as discussed in the Smyth report. He served

96278°W / 43.58611; -112.96278 Main parameters of the reactor core Fuel (fissile material) 235U Fuel state U-Al plates Neutron energy spectrum Thermal Primary control method

Anarchy: Containing the Threat of Loose Russian Nuclear Weapons and Fissile Material, coauthored with Graham T. Allison, Owen R. Cote, and Steven E. Miller

incident occurring within the plant. This can happen if sufficient fissile material comes together to start an uncontrolled chain reaction, producing a

After the Soviet Union collapsed in 1991, the site was neglected. Fissile material was left behind in mountain tunnels and bore holes, virtually unguarded

Mian, Zia; A. H. Nayyar. "Exploring Uranium Resource Constraints on Fissile Material Production in Pakistan" (PDF). The Princeton University. Princeton

and to make slow uranium isotope separation the only way to prepare fissile material suitable for use in bombs. To respond, Oppenheimer implemented, in

use: research, instrumental neutron activation analysis Origin of Fissile Material: Russia Enrichment Supplier: INVAP, Argentina Equilibrium Core Size:

in high-quality line guides for fishing rods. A cermet of depleted fissile material (e.g. uranium, plutonium) and sodalite has been researched for its

performance margins throughout the design, possibly including more fissile material in the pit and a thicker radiation case or hohlraum (see Teller-Ulam

under the aegis of the Ministry of Supply, was set up to produce fissile material and chose Risley to build its headquarters, under the control of Sir

date In the first class (process accidents) during the processing of fissile material, accidents have occurred when a critical mass has been created by accident

it has to be fueled with some sort of enriched fuel, although the fissile material being bred in the blanket can be used. Plans for a French fast reactor

most difficult step in building a nuclear weapon is the production of fissile material. Iran has enriched uranium to "less than 5%", consistent with fuel

that is irrational." The breeder design of the reactor produces more fissile material in the form of plutonium, resulting in proliferation fears. "DOE's

These included specialist chemicals for reprocessing and samples of fissile material—uranium-235 in 1959, and plutonium in 1966, as well as highly enriched

particular isotope of neptunium has a mass of 236.04657 u. It is a fissile material; it has an estimated critical mass of 6.79 kg (15.0 lb), though precise

study authored by historian Peter Hug revealed that Sulzer provided fissile material in the 1970s for the South African nuclear weapons program. Following

assumes the use of breeder reactors, which are able to create more fissile material than they consume. IPCC estimated currently proved economically recoverable

hours) the core was removed and found to contain nearly 1.4% more fissile material than when it was installed, demonstrating that breeding had occurred

diffusion process for uranium enrichment. An atomic bomb required fissile material, and the fissile uranium-235 made up only 0.7 percent of natural uranium

said. The first measure he suggested was starting negotiations for a Fissile Material Cut-Off Treaty, which he said are "overdue". Migliore also advocated

included nuclear forensics – being able to identify the traces of fissile material, products, and activation products after an explosion. Her team are

up fissile material production in Nyongbyon might reflect an intent to shift operations to Kangson, rather than an intent to cease fissile material production

one additional fission reaction, the reactor does not have enough fissile material to sustain a chain reaction on its own and relies on the neutrons from

Massachusetts Institute of Technology, [15], “A System for the Detection of Concealed Nuclear Weapons and Fissile Material aboard Cargo Containerships”

Massachusetts Institute of Technology, [15], “A System for the Detection of Concealed Nuclear Weapons and Fissile Material aboard Cargo Containerships”

which can enrich uranium for use in nuclear reactors as well as for fissile material in nuclear weapons. However, at the time its nuclear program was rolled

Anarchy: Containing the Threat of Loose Russian Nuclear Weapons and Fissile Material. MIT Press. 2004: Nuclear Terrorism: The Ultimate Preventable Catastrophe

make the best use of it. The breeders were designed to create more fissile material than they consumed. By 1948, he had become convinced that it would

removed in 1990. South Dakota had no utility-scale plants that used fissile material as a fuel in 2019. Data from the U.S. Energy Information Administration

sphere, which he showed could not only result in a faster assembly of fissile material than was possible with the gun method, but greatly reduce the amount

engine Status In development Main parameters of the reactor core Fuel (fissile material) HEU: 235U Fuel state Solid (cast cylinder) Primary control method

40-kiloton-of-TNT (170 TJ) test, a low-yield Blue Danube core with less fissile material was substituted, reducing the yield of the Buffalo R3/Kite test to

relations of the United States. Information concerning nuclear weapons and fissile material may be classified under the Atomic Energy Act of 1954 (AEA). These

the reactor was coated particles, consisting of micro-pellets of a fissile material (such as U235) surrounded by a ceramic outer layer. Initially most

Nuclear Energy Panel on the Department of Energy's plans for surplus fissile material control and disposition, April 19, 1994 Appearances on C-SPAN Biography

components for three nuclear weapons and all that it lacked was the fissile material. Ritter replied: "The Special Commission has intelligence information

to that time, but it was considered inefficient and wasteful of the fissile material. Zebra, the third test, and the last of the Sandstone series, was detonated

June 2012. Albright, David (11 October 2000). "India's and Pakistan's Fissile Material and Nuclear Weapons Inventories, end of 1999". Institute for Science

disclosed that bin Laden "insisted that he already had sufficient fissile material to build a [nuclear] bomb, having obtained it from former Soviet stockpiles

diffusion process would work on an industrial scale to provide enough fissile material to manufacture a cost-effective and timely atomic bomb. One of the

moderator. They achieve criticality using a sufficient volume of salt and fissile material. They can consume much more of the fuel and leave only short-lived

allowing the bomb to require a smaller amount of the very expensive fissile material – and also eliminating the risk of predetonation by nearby nuclear

the development of the devices had outpaced the production of the fissile material. Atomic Energy Commission officials say that a "cold test" (a test

British were not willing to be dependent on Canada for the supply of fissile material. Department of Reconstruction (13 August 1945). "Canada's Role in Atomic

1944, Peterson was given overall responsibility for the production of fissile material, with the rank of lieutenant colonel. Plutonium bred in the Manhattan

VVER-1000 VVER-1200 VVER-TOI Main parameters of the reactor core Fuel (fissile material) 235U (LEU) Fuel state Solid Neutron energy spectrum Thermal Primary control method

Chinese program by sending advisers to help in the facilities devoted to fissile material production and, in October 1957, agreed to provide a prototype bomb

ions it carried; this decreased density resulted in a reduction of fissile material in the core, which decreased the rate of fission. With less heat input

Little Boy. Using chemical explosive lenses, a sub-critical sphere of fissile material could be squeezed into a smaller and denser form. The metal needed

Boiler", a small nuclear reactor, to measure how close an assembly of fissile material was to criticality. On completing this work, Feynman was sent to the

They estimated that a uranium-235 bomb would require ten times the fissile material as one using plutonium to produce half the TNT equivalent. Estimates

the primary stages of thermonuclear bombs, placed to surround the fissile material. These layers of beryllium are good "pushers" for the implosion of

Research Committee (NDRC)'s Uranium Committee charged with producing fissile material for the bomb. Smyth proposed the electromagnetic methods that were

types 4 VVER-1200 reactors Main parameters of the reactor core Fuel (fissile material) 235U (NU/SEU/LEU) Fuel state Solid Neutron energy spectrum Thermal

concluded that Iraq could assemble nuclear weapons within months if fissile material from foreign sources were obtained. Dr. Mahdi Obeidi, who created Saddam's

1 Core Max Flux (n/cm2-s): 0.8E13 Loops Max Flux: 1.0E13 Origin of Fissile Material: Russia Enrichment Supplier: Russia Equilibrium Core Size: 44 Rods

to construct their own weapon by using the bomb's plutonium pit as fissile material for a new bomb. The terrorists enlist the help of disaffected East

country quickly fell into a crisis. The United States feared that the fissile material in the reactor could be stolen or the reactor would otherwise fall

drums contained waste from the reprocessing plant itself, and thus fissile material. Storage limits per drum were 200 grams (7.1 oz) U-235, 15 grams (0

Ministry of Supply. Christopher Hinton, responsible for the production of fissile material, said later, "I cannot remember that he ever did anything that helped

District officer with overall responsibility for the production of fissile material, recommended that the S-50 plant be placed on stand-by. The Manhattan

either freshly mined uranium or recycled plutonium and uranium as the fissile material. There are concerns about a continued supply of uranium, due to resource

whether another element, now called plutonium, could be used as a fissile material. Because of the presence of a team of refugee French scientists led

Additionally, Somalia is heavily suspected to be a major source of fissile material in Iraqi attempts to construct a nuclear weapon. In fact, despite not

which (as in the Little Boy uranium bomb) two subcritical masses of fissile material would be brought rapidly together to form a single critical mass. Plutonium

up again, the boric acid is slowly filtered out over many months as fissile material is used up and the fuel becomes less reactive. In future crewed interplanetary

the North's assured destruction. No export of nuclear equipment or fissile material; it will be intercepted, and the US will respond. No missile or missile

Atomic Energy Agency (IAEA) in 2005 proposed a comprehensive ban on fissile material that would greatly limit the production of weapons of mass destruction

country. The Fordow Fuel Enrichment Plant will be forbidden from holding fissile material. Of the 2,700 IR-1 centrifuges currently installed at Fordow, only

current existence and risk of the proliferation of weapons-usable fissile material on the Korean Peninsula constitute an unusual and extraordinary threat

thermonuclear reaction in a layer of liquid deuterium between the fissile material and the surrounding chemical high explosive. The group would realize

claimed that if the Iraqi government was able to acquire "sufficient fissile material from abroad, it could make nuclear weapons within a year". United States

power plant after 1974 when India exploded the nuclear bomb whose fissile material was produced in CIRUS reactor initially supplied by Canada.: 27  In

contamination occurred particularly in the marine environment. The fissile material in the weapons consisted mostly of uranium-235, while the radioactive

20 kt (84 TJ) boosted fission design known as W31. This used much less fissile material and was thus considerably less expensive. Developed by Sandia Laboratories

but assurances were given that the Totem devices contained much less fissile material than the Hurricane device. Martin was particularly concerned that balloon

plant. KANUPP was believed at the time to be Pakistan's only source of fissile material from which a bomb could be made. At the same time, matters were complicated

possibilities for each component of a reactor—fuel, coolant, moderator. The fissile material may be 233U, 235U, or 239Pu; the coolant may be: water, heavy water

enriched uranium after the raid. Its interest in acquiring plutonium as fissile material for weapons continued, but at a lower priority. In the Duelfer Report

Reactor concept {{{concept}}} Main parameters of the reactor core Fuel (fissile material) uranium tetrafluoride UF4 Fuel state gas Neutron energy spectrum Information

limits the possibilities of nuclear proliferation using 233U as the fissile material. 233Pa has a relatively long half-life of 27 days and a high cross

the order of 10×10−8 s (ten "shakes"). From 1 to 10 per cent of the fissile material would fission in this time; but even an atomic bomb with 1 per cent

meltdown than other reactor types, due to their larger quantity of fissile material and the higher neutron flux inside the reactor core. Other reactor

technologies to be of particular concern because they can be used to produce fissile material for use in nuclear weapons. The United States has argued that Iran's

January 1991). The Molten Salt Reactor option for beneficial use of fissile material from dismantled weapons. Annual meeting of the American Association

existence meant that any effort to control nuclear proliferation based on fissile material was thus hopeless. A reiteration of the claim can be seen in The Nuclear

16444°W / 36.81639; -116.16444 Main parameters of the reactor core Fuel (fissile material) highly enriched uranium oxide Fuel state solid Neutron energy spectrum

Yellow Sun, but considerably more economical in its use of expensive fissile material. An Anglicised version of the Mark 28 was developed, known as Red Snow

operational (as of December 2021) Main parameters of the reactor core Fuel (fissile material) 235U (NU/SEU/LEU) Fuel state Solid Neutron energy spectrum Thermal

was completed in 2006. Oregon had no utility-scale plants that used fissile material as a fuel in 2019. Data from the U.S. Energy Information Administration

Times, writes that "the revelation of an effort to steal and sell fissile material in Georgia's now celebrated 'breakaway region' of South Ossetia ..

concluded that Iraq could assemble nuclear weapons within months if fissile material from foreign sources were obtained. However, IISS also concluded that

other weapon, and there had been no contamination of the site with fissile material. The EOD team found that the bomb had apparently left the airplane

development activities that would bring it closer to producing the fissile material for completing a nuclear device following a decision to do so. Some

radioactive waste is the by-product of reprocessing spent fuel to produce fissile material for nuclear weapons. In 1982, Congress established a national policy

Iran, if I were Iran—a crazed fanatic, I'd say let's get a little fissile material to Hezbollah, have them carry it to Chicago or some other place, and

of about 80,000–112,369 tons of uranium, India has more than enough fissile material to supply its nuclear weapons program, even if it restricted Plutonium

heard in previous testimony from members of OSD, Iran could produce fissile material for a nuclear weapon in less than two weeks and would only take several

recovered. The planned Swedish bombs intended to utilize Pu-239 as the fissile material. When the early drafts (circa 1955) were replaced by the more concrete

non-asymptotic moderator flow and a non-uniform temperature distribution in the fissile material]. www.researchgate.net (in German). Technische Hochschule Zürich. Retrieved

1969 Status Decommissioned Main parameters of the reactor core Fuel (fissile material) Highly enriched uranium Fuel state Solid Neutron energy spectrum Thermal

crest factor critical angle critical mass The smallest amount of fissile material needed for a sustained nuclear chain reaction. cube of theoretical

megaton-range fission bombs represented an uneconomical use of expensive fissile material, that they could not be built to produce yields of more than a megaton

40-kiloton-of-TNT (170 TJ) test, a low-yield Blue Danube core with less fissile material was substituted, reducing the yield to 3 kilotons of TNT (13 TJ). Titterton

development activities that would bring it closer to producing the fissile material for completing a nuclear device following a decision to do so." In

the 235U isotope content in natural uranium, when used as a primary fissile material in most areas of nuclear technology, necessitated enrichment of natural

for South Africa's uranium enrichment, which provided the necessary fissile material for the six atomic bombs produced by South Africa. After the Federal

Proliferation Created by the Accumulation of a Large Volume of Weapons-Usable Fissile Material in the Territory of the Russian Federation". Federal Register. 2015-05-28

composite uranium-plutonium core made more economical use of the available fissile material. In May 1948, the Los Alamos Scientific Laboratory commenced work on

installed in 1995. Colorado had no utility-scale plants that used fissile material as a fuel in 2022. Data from the U.S. Energy Information Administration

Verification and Monitoring of Proliferation of Nuclear Weapons and Fissile Material" section of the National Defense Authorization Act. Tuesday, March

1964 Status Decommissioned Main parameters of the reactor core Fuel (fissile material) Highly enriched uranium Fuel state Solid Neutron energy spectrum Thermal

reconstitute its nuclear program. If Iraq acquired a significant quantity of fissile material through foreign assistance, it could have a crude nuclear weapon within

could produce a nuclear weapon within one or two years, if it obtains fissile material and other necessary materials. November 8: The UN security council

interchange.             15: The nuclear power station having closed and all fissile material having been removed, the branch south of Blaenau Ffestiniog became

the assassination of Yasuyuki Sugita for leaving Kunashi Island with fissile material and the knowledge of the neutron bomb. Was shot by Russian mob boss

Radio-frequency hazard symbol, 3. Slow Moving Vehicle symbol, 4. Fissile material symbol, 5. A laser symbol that was in development at the time. Suggested

scientists from the UK worked on the Manhattan Project; the plutonium fissile material, which was half the world's supply, for the July Trinity (nuclear test)

enriching uranium ore is necessary to increase the proportion of fissile material and obtain a more reactive fuel. Finally, in April 1939, French physicists