Listing 1 - 10 of 61 | << page >> |
Sort by
|
Choose an application
Choose an application
Choose an application
Choose an application
Choose an application
D’une façon générale, l’état critique désigne la frontière entre deux comportements antinomiques d’un système physique ou biologique. Pour les spécialistes des réacteurs nucléaires, c’est l’état qui sépare le cas d’une réaction en chaîne de fissions qui s’éteint inexorablement et celui d’une réaction qui, au contraire, se développe de plus en plus vite, jusqu’à ce qu’intervienne une contre-réaction. Cet état, caractérisé par un « facteur de multiplication » juste égal à 1, est celui qui est visé dans un réacteur devant fournir une puissance constante dans le temps. Mais dans les autres installations où sont manipulées des matières fissiles – fabrication, transports, retraitement de combustibles nucléaires – il faut absolument éviter d’atteindre et surtout de dépasser l’état critique qui conduirait à un accident causant des dégâts matériels et émettant des rayonnements dangereux. Ce livre développe ces notions de criticité, apporte les éléments de neutronique permettant d’évaluer le facteur de multiplication, analyse les scénarios accidentels susceptibles d’intervenir et présente les expérimentations et les codes de calcul associés. Les spécialistes du nucléaire seront intéressés par une présentation originale de ce problème. Les autres lecteurs découvriront un domaine de la physique peu connu mais, comme tous les autres, passionnant.
Nuclear fission. --- Nuclear reactions. --- Criticality (Nuclear engineering)
Choose an application
Nuclear power plants --- Nuclear engineering --- Environmental aspects --- Safety measures.
Choose an application
Nuclear engineering --- Atomic power engineering --- Engineering --- Nuclear physics --- Nuclear energy --- Security measures --- Automatic control --- Safety measures
Choose an application
Performance specifications and testing methods for the evaluation of handheld instruments (also known as radionuclide identification devices or RIDs) used for the detection and identification of radionuclides, which emit gamma rays and, in some cases, neutrons, are contained in this standard. The specifications for general, radiological, environmental, electromagnetic and mechanical performances are given and the corresponding testing methods are described. The documentation to be provided by the manufacturer is listed as part of the requirements. Normative and informative annexes that provide guidance for the implementation of this standard are also included. (The PDF of this standard is available at no cost compliments of the Department of Homeland Security Domestic Nuclear Detection Office. http://standards.ieee.org/getN42/download/N42.34-2015.pdf). Scope: This standard specifies general, radiological, environmental, electromagnetic, and mechanical requirements,and associated test methods for handheld radionuclide identification devices (RIDs). Successful completion of the tests described in this standard should not be construed as an ability to identify all radionuclides in all environments. Purpose: This standard addresses instruments that are used to detect and identify radionuclides, display gamma-ray exposure rates, and when provided, indicate the presence of neutron radiation. The identification requirements established by this standard are based on the sources and source configurations defined in this standard. When an RID is used operationally, the configuration of a source or object being analyzed is typically unknown, which may cause other radionuclides or isotopes to be identified.
Radioisotopes --- Radioactive isotopes --- Radioactive nuclides --- Radionuclides --- Isotopes --- Nuclear engineering --- Radioactive substances --- Radiochemistry --- Standards. --- Radioactivity --- Instruments
Choose an application
Nuclear nonproliferation --- Nuclear facilities --- Atomic facilities --- Facilities, Nuclear --- Nuclear installations --- Nuclear energy --- Nuclear engineering --- International cooperation.
Choose an application
Boiling water reactors. --- Spent reactor fuels --- Fuel burnup (Nuclear engineering) --- Storage.
Listing 1 - 10 of 61 | << page >> |
Sort by
|