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Neutron Reflector |  Nuclear Physics | class 12 physics subject notes lectures|CBSE|IITJEE|NEET
Neutron Reflector | Nuclear Physics | class 12 physics subject notes lectures|CBSE|IITJEE|NEET
Published: 2016/11/18
Channel: Wikitechy School
Perfect Neutron Reflector - Computer Simulation (for Susan)
Perfect Neutron Reflector - Computer Simulation (for Susan)
Published: 2012/07/18
Channel: Peter Alaric
Neutrons_Cadmium.avi
Neutrons_Cadmium.avi
Published: 2009/11/15
Channel: Carl Willis
FTB 5 - The BEST Nuclear Reactor Setup - The Most Iridium I
FTB 5 - The BEST Nuclear Reactor Setup - The Most Iridium I've Used
Published: 2013/07/21
Channel: SonicWaffles
Neutron reflector
Neutron reflector
Published: 2017/04/03
Channel: Search Engine
Operation Tumbler Snapper  Shot Dog 1952 Ground ZERO
Operation Tumbler Snapper Shot Dog 1952 Ground ZERO
Published: 2016/07/23
Channel: ZIG ZAG
Rarpack Episode 12: I fixed the reflectors!
Rarpack Episode 12: I fixed the reflectors!
Published: 2014/10/17
Channel: Robert Arblaster
Nuclear Reactor - Understanding how it works | Physics Elearnin
Nuclear Reactor - Understanding how it works | Physics Elearnin
Published: 2013/04/23
Channel: Elearnin
Muse - JFK + Defector [Official Lyric Video]
Muse - JFK + Defector [Official Lyric Video]
Published: 2015/06/03
Channel: Muse
How an Atom Bomb works*Nuclear Fission Chain Reaction*Concept Schools
How an Atom Bomb works*Nuclear Fission Chain Reaction*Concept Schools
Published: 2015/08/30
Channel: DOLL1789MarshalDhody
UCO Original candle lantern
UCO Original candle lantern
Published: 2017/02/12
Channel: JIUJITSU2000
What is a Fast Breeder Reactor
What is a Fast Breeder Reactor
Published: 2016/12/26
Channel: Senior Secondary Science
Idea: Complementary Transmutation Nuclear Reactor
Idea: Complementary Transmutation Nuclear Reactor
Published: 2012/07/13
Channel: Peter Alaric
THE ADVANCE TEST REACTOR  ATR  NUCLEAR REACTOR 75614
THE ADVANCE TEST REACTOR ATR NUCLEAR REACTOR 75614
Published: 2015/08/19
Channel: PeriscopeFilm
Feed the beast- Mindcrack: Ep. 118 -Neutron Reflectors Are Breaking Bad
Feed the beast- Mindcrack: Ep. 118 -Neutron Reflectors Are Breaking Bad
Published: 2014/01/19
Channel: SuperPurplepaint
Mock Up Of Nuclear Bomb In A Suitcase - James Burke (1978)
Mock Up Of Nuclear Bomb In A Suitcase - James Burke (1978)
Published: 2017/05/18
Channel: Peter Borenius
Neutron moderator
Neutron moderator
Published: 2014/11/15
Channel: Audiopedia
The Fermi Paradox — Where Are All The Aliens? (1/2)
The Fermi Paradox — Where Are All The Aliens? (1/2)
Published: 2015/05/06
Channel: Kurzgesagt – In a Nutshell
SNAP-10A: First Nuclear Reactor In Space 1965 Atomic Energy Commission (AEC)
SNAP-10A: First Nuclear Reactor In Space 1965 Atomic Energy Commission (AEC)
Published: 2016/11/24
Channel: Jeff Quitney
Advanced Test Reactor ~ 1965 US Atomic Energy Commission; AEC Nuclear Reactor Research
Advanced Test Reactor ~ 1965 US Atomic Energy Commission; AEC Nuclear Reactor Research
Published: 2017/06/05
Channel: Jeff Quitney
Beryllium oxide - The Russian Hahn David
Beryllium oxide - The Russian Hahn David's channel
Published: 2012/09/20
Channel: ruhahn
SNAP-10A (1965) First Nuclear Reactor polluting Space - expected duration of 4,000 years
SNAP-10A (1965) First Nuclear Reactor polluting Space - expected duration of 4,000 years
Published: 2016/12/02
Channel: Servitutt
First Test
First Test
Published: 2014/11/24
Channel: Tim Flaspoler
FTB Infinity- Ep.47 - Molecular Transformer!
FTB Infinity- Ep.47 - Molecular Transformer!
Published: 2015/04/24
Channel: Gaming On Caffeine
Minecraft Industrial Craft 2 Microcycle Nuclear Reactor Design(Generator, Breeder)
Minecraft Industrial Craft 2 Microcycle Nuclear Reactor Design(Generator, Breeder)
Published: 2013/11/20
Channel: Kcuziri
First US Commercial Nuclear Reactor: "Atomic Power at Shippingport" circa (1958) AEC-Westinghouse
First US Commercial Nuclear Reactor: "Atomic Power at Shippingport" circa (1958) AEC-Westinghouse
Published: 2017/02/04
Channel: Old Movies Reborn
ThruNite Neutron 2C V3 2017 Review
ThruNite Neutron 2C V3 2017 Review
Published: 2017/05/31
Channel: WeaponCollector
First Commercial Nuclear Reactor   Shipping Port PA
First Commercial Nuclear Reactor Shipping Port PA
Published: 2014/01/31
Channel: Kathy Reed
The Missing Nickelodeon Movie - Internet Mysteries - GFM (The Hunt for Cry Baby Lane)
The Missing Nickelodeon Movie - Internet Mysteries - GFM (The Hunt for Cry Baby Lane)
Published: 2017/02/21
Channel: TheGamerFromMars
Escudo reflector - ZELDA TWW - Ep 15
Escudo reflector - ZELDA TWW - Ep 15
Published: 2015/07/12
Channel: alexelcapo
Telescopes: Crash Course Astronomy #6
Telescopes: Crash Course Astronomy #6
Published: 2015/02/19
Channel: CrashCourse
FTB Infinity lite 1.10, 0060 3 - IndustrialCraft 2; Molecular Transformer#2
FTB Infinity lite 1.10, 0060 3 - IndustrialCraft 2; Molecular Transformer#2
Published: 2017/06/21
Channel: Franz Pansen
TekkitPedia Episodio 10 - IC2 - Giochicchiando con il Nuclear Reactor e i suoi Components
TekkitPedia Episodio 10 - IC2 - Giochicchiando con il Nuclear Reactor e i suoi Components
Published: 2013/03/27
Channel: Luscha42
Minecraft 1.4.7 Industrialcraft 2 Modreview/Tutorial Deutsch/German Crafting/Erklärung AKW Teil 3
Minecraft 1.4.7 Industrialcraft 2 Modreview/Tutorial Deutsch/German Crafting/Erklärung AKW Teil 3
Published: 2013/08/06
Channel: Zaimän Zockt
Minecraft Nuclear reactor Autoloader system for 1.4.5. Industrial Craft Nuclear Reactor Mark 1 EA*
Minecraft Nuclear reactor Autoloader system for 1.4.5. Industrial Craft Nuclear Reactor Mark 1 EA*
Published: 2013/02/10
Channel: NENISSAHIN
Nuclear Fission and Fusion
Nuclear Fission and Fusion
Published: 2015/09/10
Channel: SliderBase
Best Red Dot Under $200
Best Red Dot Under $200
Published: 2017/06/15
Channel: The Daily Shooter
Optimal routing vs. Route Reflector VNF - reconcile the fire with water
Optimal routing vs. Route Reflector VNF - reconcile the fire with water
Published: 2015/10/08
Channel: TeamNANOG
Attaching a DSLR to a Telescope with views of Jupiter and the Moon
Attaching a DSLR to a Telescope with views of Jupiter and the Moon
Published: 2016/10/08
Channel: scannerguy1968
King Wing Reflector
King Wing Reflector
Published: 2017/04/26
Channel: Hydrotek Hydroponics
What Is Light?
What Is Light?
Published: 2015/10/15
Channel: Kurzgesagt – In a Nutshell
#vBrownBag 2014 OpenStack Paris - Thomas Morin, Mathieu Rohon – Neutron and BGP VPNs
#vBrownBag 2014 OpenStack Paris - Thomas Morin, Mathieu Rohon – Neutron and BGP VPNs
Published: 2014/11/04
Channel: vBrownBag
A quick look at Neutron Reflectometry at Institut Laue-Langevin in Grenoble, France
A quick look at Neutron Reflectometry at Institut Laue-Langevin in Grenoble, France
Published: 2016/06/07
Channel: PENN REACT YouTube
ReactorCraft Tutorial #6 - 6 Core Fission Reactor
ReactorCraft Tutorial #6 - 6 Core Fission Reactor
Published: 2014/09/10
Channel: SentinalhMC
Крафт в Minecraft еды
Крафт в Minecraft еды
Published: 2015/07/21
Channel: Sergey Samsonov
What is DEMON CORE? What does DEMON CORE mean? DEMON CORE meaning, definition & explanation
What is DEMON CORE? What does DEMON CORE mean? DEMON CORE meaning, definition & explanation
Published: 2017/04/26
Channel: The Audiopedia
Monster Craft смотреть
Monster Craft смотреть
Published: 2015/02/08
Channel: Bogdan Koshelev
Minecraft Mod Twilight Forest
Minecraft Mod Twilight Forest
Published: 2015/03/01
Channel: Elisei Gromov
Things to know about Beryllium || Obsessed Scientist
Things to know about Beryllium || Obsessed Scientist
Published: 2015/04/23
Channel: Obsessed Scientist
Fukushima 50 mile plumegate unit 4 pool damage spent fuel rod inventory loss  origin BEYOND URGENT
Fukushima 50 mile plumegate unit 4 pool damage spent fuel rod inventory loss origin BEYOND URGENT
Published: 2015/12/20
Channel: WAPTEK
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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A neutron reflector is any material that reflects neutrons. This refers to elastic scattering rather than to a specular reflection. The material may be graphite, beryllium, steel, tungsten carbide, or other materials. A neutron reflector can make an otherwise subcritical mass of fissile material critical, or increase the amount of nuclear fission that a critical or supercritical mass will undergo. Such an effect was exhibited twice in accidents involving the Demon Core, a subcritical plutonium pit that went critical in two separate fatal incidents when the pit's surface was momentarily surrounded by too much neutron reflective material.

Nuclear reactors[edit]

In a uranium graphite chain reacting pile, the critical size may be considerably reduced by surrounding the pile with a layer of graphite, since such an envelope reflects many neutrons back into the pile.

To obtain a 30-year life span, the SSTAR nuclear reactor design calls for a moveable neutron reflector to be placed over the column of fuel. The reflector's slow downward travel over the column would cause the fuel to be burned from the top of the column to the bottom.

A reflector made of a light material like graphite or beryllium will also serve as a neutron moderator reducing neutron kinetic energy, while a heavy material like lead or lead-bismuth eutectic will have less effect on neutron velocity.

Nuclear weapons[edit]

A similar envelope can be used to reduce the critical size of a nuclear weapon, but here the envelope has an additional role: its very inertia delays the expansion of the reacting material. For this reason such an envelope is often called a tamper. The weapon tends to fly to bits as the reaction proceeds and this tends to stop the reaction, so the use of a tamper makes for a longer-lasting, more energetic, and more efficient explosion. The most effective tamper is the one having the highest density; high tensile strength is irrelevant because no material remains intact under the extreme pressures of a nuclear weapon. Coincidentally, high-density materials are excellent neutron reflectors. This makes them doubly suitable for nuclear weapons. The first nuclear weapons used heavy uranium or tungsten carbide tamper-reflectors.

On the other hand, a heavy tamper necessitates a larger high-explosive implosion system. The primary stage of a modern thermonuclear weapon may use a lightweight beryllium reflector, which is also transparent to X-rays when ionized, allowing the primary's energy output to escape quickly to be used in compressing the secondary stage.

While the effect of a tamper is to increase efficiency, both by reflecting neutrons and by delaying the expansion of the bomb, the effect on the critical mass is not as great. The reason for this is that the process of reflection is time-consuming.

See also[edit]

External links[edit]

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