Get this from a library! Étude et expérimentation de la commande d’un hacheur – série – parallèle. [Christian Pourny; Conservatoire national des arts et métiers. Results 1 – 6 of 6 Commande Floue D un Redresseur En Cascade Avec Un Hacheur Double Étage by Birame, M’hamed / Mokrani, Lakhdar and a great selection. Schéma de principe des convertisseurs N/A parallèles. A partir des . (2R en parallèle avec 2R est égale à R, R en série avec R donne 2R et ainsi de suite).

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Contribution to the study of the stability of water-cooled reactors; Contribution a l’etude de la stabilite des reacteurs refroidis par de l’eau.

Hacheur (électronique) — Wikipédia

Persistent cookies are stored on your hard disk and have a pre-defined expiry date. Space-time dependent impulse response of a subcritical cylindrical reactor; Reponse impulsionnelle spatio-temporelle d’un reacteur cylindrique en regime sous-critique.

G2 and G3 reactors design; Parallelee des reacteurs G2 et G3. Les fonds du cylindre ont pose des problemes particuliers qui ont conduit a la forme hemispherique adoptee. Measurement and regulation of the ett of a homogeneous plutonium reactor; Mesure et regulation du niveau d’un reacteur homogene au plutonium.

The experimental results parallels then compared with values obtained, for the same reactivities, by the pulsed neutron technique. Directory of Open Access Journals Sweden. Un appareillage permettant la mesure du flux radial a ete realise. The solution which we propose for this storage problem is presented in this paper.

In order to extract from the spectrum a quantity proportional to the burn up, it is necessary to: The input speed of water into the reactor being one of the important parameters in the running of the pile, a spiral supply input chamber is used, allowing this speed to be regulated in amount and direction.

The paper describes how, previous to any starting-up operation, the tests performed, especially those concerned with the power plant and the pressure vessel, have helped to bring the commissioning date closer.

Fluctuations in a system depending on several random parameters. Celle-ci consiste a mesurer la probabilite de compter un, deux, etc Les reacteurs de hachehr filiere graphite-gaz faisant l’objet d’une communication particuliere, on examine ici la surete des autres types de reacteurs etudies en France: On expose brievement les hahceur d’essais mis en oeuvre et les performances de ces diverses. The main identified environmental impacts are fossil fuels consumption, climate change and respiratory effects due to inorganics compounds.

The burn-out flux following uniform ‘stopped’ heating has been studied in paralpele channel containing still water.

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Cette etude etant en general incompatible avec la production d’energie, on a limite au minimum la puissance du reacteur pour pouvoir obtenir une structure simple et peu encombrante, un acces facile, une bonne maniabilite et une grande souplesse de fonctionnement et d’utilisation. Une methode de reglage, basee sur l’emploi d ‘une courbe enveloppe des courbes de flux possibles, est donnee.

Hewlett Packard – Agilent Technologies Vers: In the second part the experimental results are given, together with some indications on their comparison with theoretical estimations.

Les principaux resultats sont fournis ici et commentes. Parmi les nombreuses methodes utilisees, on constate que les installations sont peu importantes, lorsque le combustible est resistant. These conditions entail certain technical and economic specifications for seriie reactors used in this way otherwise they are unlikely to be competitive.

The study of local boiling, which is based on the properties of the correlation functions for the neutron noise of detectors placed in sedie core, shows that a privileged frequency occurs in the power spectrum of the noise. It is necessary to be able to detect the formation of these cracks as possible in order to avoid all risk of fission products release or any reaction of uranium to the contact of the refrigerating gas.

Hacheur (électronique)

Elles sont liees a la localisation de la centrale et a son contexte economique general, a la structure de la demande d’energie electrique et thermique a laquelle elle doit satisfaire, au niveau des couts des. Le procede analytique utilise est la mesure differentielle de la conductibilite thermique du gas.

Direct parallelle of H, and N, has been brought about under the influence of radiation. The main tube is m in length. It should be of interest to those who deal with problems concerned with the design or operation of irradiation loops in experimental reactors or of similar equipment. Cote chargement, des sas a barillets, pesant chacun 50 tonnes; permettent de faire passer les cartouches neuves sous la pression de 15 atmospheres.

Elle presente les principales techniques utilisees et insiste plus particulierement sur les difficultes rencontrees et la precision obtenue; elle indique egalement l’application de ces differentes methodes sur les reacteursen vue de l’obtention des resultats determines.

La pollution chimique a conduit a mettre au point pour le cas particulier des reacteursdes circuits d’epuration par echange d’ions. A brief description of hachekr currently used for making activation detectors, thin films and various deposits used in nuclear reactors. Dans le present rapport, nous examinons des parqllele pouvant endommager des installations du reacteur Pegase. Collection of references dealing with the physicochemical studies of fused salts, in particular the alkali and alkali earth halides.

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Ils ont prepare une deuxieme serie de catalyseurs en. The corresponding safety studies are presented, particular stress being placed on the original work developed in these fields. Aurel Wireless System Vers: New modelling method for fast reactor neutronic behaviours analysis; Nouvelles methodes de modelisation neutronique des reacteurs rapides de quatrieme Generation.

The power limit of swimming-pool type reactors depends on the phenomenon of the appearance of burn-out. Ces etudes techniques se completent de considerations economiques. After 4 years operation, experimentation and maintenance of the gas loops built especially for the nuclear fuel testing reactor Pegase, it appears xerie not only to gather together in a single document the essential characteristics and particularities of these devices and of their associated equipment, but also to give the reasons for the technical modifications and the way in which they were carried out; this is done here by the persons themselves who were responsible, day after day, for operating these loops.

References relating to the corrosion of materials by these salts are included and the treatment of the salts with a view to recuperation after irradiation in a nuclear reactor is discussed.

Stricter instructions have been given for rising power hacheue and automatic burst slug sy already improved as said above has been duplicated by a human control. La capacite des modeles a decrire le phenomene d’autoprotection, a representer les fuites neutroniques au niveau d’un reseau d’assemblages combustibles et a generer des sections macroscopiques representatives est appreciee sur le domaine des reacteurs rapides innovants respectant les criteres de quatrieme generation.

A spatial field simulator used for this problem bidimensional problem is described. Now a bibliographical study more qualitatively than quantitatively has been done. Since this study is in general incompatible with energy production, the power of the reactor has been limited to a minimum so as to be able to obtain a simple and compact structure, parallels access, good handling and great flexibility of operation and utilisation. The oxygen flux through the membrane is measured in terms of temperature under different oxygen partial pressure gradients.

This reactor is used as a pulsed neutron source for physical experiments carried out by the time-of-flight method. Some particular aspects of control in nuclear power reactors; Conception de la surete en france et influence des imperatifs de surete sur la conception des reacteurs. Ainsi, un nouveau schema de calcul a ete defini.