Chain reaction | Definition of Chain reaction at ...

Chain reaction definition, a self-sustaining reaction in which the fission of nuclei of one generation of nuclei produces particles that cause the fission of at least an equal number of nuclei of the succeeding generation. See more.

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What properties make a nuclear chain reaction self-sustaining?

Jan 02, 2017· A nuclear reaction is self sustaining when there are enough neurons produced in the core to replace neurons that are lost due to leakage from the core or being absorbed by non-fuel material in the core. When a reactor is critical, it is at a stead...

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Nuclear Fission Chain Reaction

Nuclear Chain Reaction. It was pointed out in the preceding articles that the neutron-induced fission reaction is the reaction, in which the incident neutron enters the heavy target nucleus (fissionable nucleus), forming a compound nucleus that is excited to such a high energy level (E excitation > E critical) that the nucleus splits into two large fission fragments.

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Chain reaction - Project Management Institute

Sustainability is a lofty goal for organizations to pursue. Unfortunately, despite their best efforts and best practices, no company can realize sustainable goals alone. This article discusses how companies can forge professional relationships with suppliers who share similar goals in achieving and realizing sustainability-related outcomes. In doing so, it looks at the challenges involved in ...

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Uranium-235 Chain Reaction - HyperPhysics Concepts

Uranium-235 Chain Reaction If an least one neutron from U-235 fission strikes another nucleus and causes it to fission, then the chain reaction will continue. If the reaction will sustain itself, it is said to be "critical", and the mass of U-235 required to produced the critical condition is said to be a " critical mass ".

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science chapter 2 Flashcards | Quizlet

It is not possible to stop or control a chain reaction once it has been started. C) Three or more neutrons must be released to sustain a chain reaction. D) A chain reaction will only take place when a critical mass of material has been assembled. E) Only uranium isotopes are capable of supporting a chain reaction.

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Ch 7. Flashcards | Quizlet

a term that generally refers to any reaction in which one of the products becomes a reactant and thus makes it possible for the reaction to become self-sustaining critical mass the amount of fissionable fuel required to sustain a chain reaction

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Nuclear chain reaction - Energy Education

Figure 1 below is a visual representation of what a nuclear fission chain reaction looks like. If at least one neutron from each fission strikes another U-235 nucleus and initiates fission, the chain reaction is sustained and it is said to be critical.

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What is a self sustaining nuclear chain reaction? - Quora

Feb 19, 2018· To answer this question, let's look at something I've always heard called the "six-factor formula" [math]k_{eff}=L_f p L_{th} f eta epsilon[/math] This formula considers everything that can happen to a neutron born from fission. First, the neutr...

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Chain Reaction (1996 film) - Wikipedia

Chain Reaction is a 1996 American science fiction action thriller film directed by Andrew Davis, starring Keanu Reeves, Morgan Freeman, Rachel Weisz, Fred Ward, Kevin Dunn and Brian Cox.The plot centers on the invention of a new non-contaminating power source based on hydrogen and the attempts by the United States Government to prevent the spreading of this technology to other countries.

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Nuclear chain reaction - Wikipedia

A nuclear chain reaction occurs when one single nuclear reaction causes an average of one or more subsequent nuclear reactions, thus leading to the possibility of a self-propagating series of these reactions. The specific nuclear reaction may be the fission of heavy isotopes (e.g., uranium-235, 235 U). The nuclear chain reaction releases several million times more energy per reaction than any ...

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Chain Reaction Accidents :: Car Accident Center :: Justia

These types of accidents are also called "chain reactions." Although they can be the result of a single driver's negligence, chain reaction accidents may involve instances of carelessness by multiple drivers. Many people, including passengers in any of these cars, may sustain injuries.

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Module 4: Nuclear Chemistry Flashcards | Quizlet

A) the minimum amount of fissionable material that will sustain a chain reaction. B) the maximum amount of fissionable material that will sustain a chain reaction. C) the amount of fissionable material that produces the most energy when split. D) the largest amount of fissionable material that can be obtained from isotopic enrichment.

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Nuclear chain reaction | physics | Britannica

Other articles where Nuclear chain reaction is discussed: chain reaction: Nuclear chain reactions are series of nuclear fissions (splitting of atomic nuclei), each initiated by a neutron produced in a preceding fission. For example, 212 neutrons on the average are released by the fission of each uranium-235 nucleus that absorbs a low-energy neutron.

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Chain Reaction | Encyclopedia.com

chain reaction, self-sustaining reaction that, once started, continues without further outside influence. Proper conditions for a chain reaction depend not only on various external factors, such as temperature, but also on the quantity and shape of the substance undergoing the reaction.

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Chain reaction (chemistry) | Article about Chain reaction ...

The minimum quantity of a fissionable material necessary to sustain a nuclear chain reaction is called the critical mass. In a nuclear fission bomb, a chain reaction is started by forcing together two or more samples of fissionable material, each of less than critical mass, to form one sample of supercritical mass.

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nuclear chemistry chapter 19 Flashcards | Quizlet

A critical mass of a fissionable material is the amount needed to provide a high enough internal neutron flux to sustain the chain reaction (production of enough neutrons to cause the continuous fission of further material). A sample with less mass is still radioactive, but cannot sustain a chain reaction.

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Nuclear Reactions questions? | Yahoo Answers

Jun 12, 2013· Q1:Why is a critical mass of fissile material needed to initiate a fission chain reaction? The nucleus of a fissile atom will not fission unless it is bombarded by more than one fast-moving neutron. Every neutron released by the initial fission reaction must collide with another fissile nucleus to sustain the chain reaction. The number of neutrons used to initiate a fission reaction must be ...

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Chemistry of a Fire - St. Bonaventure University

any chemical reaction during combustion, but which enables the reactants to combust more readily. Once ignited, a chain reaction must take place whereby fires can sustain their own heat by the further release of heat energy in the process of combustion and may propagate, provided there is a continuous supply of an oxidizer and fuel.

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Chain Reaction Research | Sustainability Risk Analysis

Chain Reaction Research conducts free sustainability risk analysis for financial analysts, credit analysts, commercial bankers, institutional investors, corporations, and other stakeholders. Our special focus is demonstrating that deforestation is material financial risk.

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Critical mass - Wikipedia

When k = 1, the mass is critical, and the chain reaction is self-sustaining. A subcritical mass is a mass of fissile material that does not have the ability to sustain a fission chain reaction. A population of neutrons introduced to a subcritical assembly will exponentially decrease.

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Chain Reaction - Institute for Supply Management

A.T. Kearney | ChAin ReACTion 1 S ustainability and corporate stewardship is a social ideal and a business necessity. The former tension between efficiency and sustainability has vanished as being sustainable is now a source

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How is critical mass related to a chain reaction - Answers

Oct 22, 2009· Fissionable materials can sustain a chain reaction, but only if the energy of the neutrons present is sufficiently high. Critical mass is the amount of material needed, in ideal circumstances, to ...

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CHAINREACTION - About Us

A chain reaction in the media begins with authentic relationships. Remaining genuine, constantly keeping in touch with contributors via social media, blogging and press coverage, and updating them on the progress of your project continually are some of the most important things you can do for an Initial Token Offering, Initial Public Offering or Kickstarter-type crowdfunding campaign.

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Chain reaction | chemistry | Britannica

Chain reaction, in chemistry and physics, process yielding products that initiate further processes of the same kind, a self-sustaining sequence. Examples from chemistry are burning a fuel gas, the development of rancidity in fats, "knock" in internal-combustion engines, and the polymerization of

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Chicago Pile-1 - Wikipedia

Chicago Pile-1 (CP-1) was the world's first artificial nuclear reactor.On 2 December 1942, the first human-made self-sustaining nuclear chain reaction was initiated in CP-1, during an experiment led by Enrico Fermi.The secret development of the reactor was the first major technical achievement for the Manhattan Project, the Allied effort to create atomic bombs during World War II.

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The Uranium 235 Chain Reaction*Physics Made Fun - YouTube

Mar 25, 2016· The Uranium 235 Chain Reaction*Physics Made Fun ... Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a fission chain reaction. It is the only fissile isotope that is ...

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The Chain | Chain Reaction Research | Sustainability Risk ...

Addressing KLK's response to the CRR Sustainability... On 26 February 2015, Chain Reaction Research (CRR) published its sustainability risk analysis of Malaysian palm oil company Kuala Lumpur Kepong (KLK). The report gives

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Reports | Chain Reaction Research | Sustainability Risk ...

In April 2018, Chain Reaction Research (CRR) concluded that Cargill's 2030 zero-deforestation deadline allowed its Brazilian suppliers to continue deforesting in the Cerrado. This report assesses Cargill's current deforestation risks in Brazil's soy supply chain, given recent …

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First Nuclear Sustained Chain Reaction - YouTube

Aug 18, 2008· A visit to the site of the first self-sustaining chain reaction at Stagg Field Stadium at the Univerity of Chicago, December 2, 1942.

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