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FUEL PEBBLE [5 records]
Record 1 - internal organization data 2017-04-19
Record 1, English
Record 1, Subject field(s)
- Nuclear Fission Reactors
Record 1, Main entry term, English
- pebble bed modular reactor
1, record 1, English, pebble%20bed%20modular%20reactor
correct
Record 1, Abbreviations, English
- PBMR 1, record 1, English, PBMR
correct
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A particular design of pebble bed reactor [that] is fueled and moderated by fuel spheres each containing TRISO coated oxide fuel grains and a surrounding hollow sphere of graphite moderator. 1, record 1, English, - pebble%20bed%20modular%20reactor
Record number: 1, Textual support number: 1 CONT
These are stacked in a close packed lattice and cooled by helium, which is used to drive a turbine directly, or may be used to provide process heat for the production of hydrogen fuel. The PBMR is modular in that only small to mid-sized units [are] designed ... 1, record 1, English, - pebble%20bed%20modular%20reactor
Record 1, French
Record 1, Domaine(s)
- Réacteurs nucléaires de fission
Record 1, Main entry term, French
- réacteur modulaire à lit de boulets
1, record 1, French, r%C3%A9acteur%20modulaire%20%C3%A0%20lit%20de%20boulets
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Réacteur à haute température refroidi au gaz de quelque 160 MW fondé sur un développement allemand [...] 2, record 1, French, - r%C3%A9acteur%20modulaire%20%C3%A0%20lit%20de%20boulets
Record number: 1, Textual support number: 1 OBS
Pour modérer la réaction en chaîne, il utilise du graphite pyrolytique à la place de l'eau. Pour refroidir le réacteur, il utilise un gaz semi-inerte tel que l'hélium, l'azote ou le dioxyde de carbone qui est porté à très haute température puis actionne directement une turbine. 3, record 1, French, - r%C3%A9acteur%20modulaire%20%C3%A0%20lit%20de%20boulets
Record number: 1, Textual support number: 2 OBS
Le combustible du PBMR est confiné dans des billes de graphite de la grandeur d'une boule de billard. Une fusion du cœur est impossible pour des raisons de physique. 2, record 1, French, - r%C3%A9acteur%20modulaire%20%C3%A0%20lit%20de%20boulets
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2017-04-19
Record 2, English
Record 2, Subject field(s)
- Combustion and Fuels (Fireplaces)
- Nuclear Fission Reactors
Record 2, Main entry term, English
- once through then out concept
1, record 2, English, once%20through%20then%20out%20concept
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- OTTO concept 1, record 2, English, OTTO%20concept
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
In contrast to the prismatic fuel, the coated particles are homogeneously distributed within the spherical fuel matrix, which acts as the moderator. There are two generic concepts for pebble bed reactors in terms of refueling.... Another type is the once through then out(OTTO) concept where the pebbles only perform one passage through the core. For the on-line refueling designs, the pebbles are circulated by gravity in the core, which is surrounded by a graphite reflector and pneumatically transported in the fuel handling system. 1, record 2, English, - once%20through%20then%20out%20concept
Record 2, French
Record 2, Domaine(s)
- Combustion et combustibles (Foyers)
- Réacteurs nucléaires de fission
Record 2, Main entry term, French
- concept du passage unique
1, record 2, French, concept%20du%20passage%20unique
proposal, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- OTTO 2, record 2, French, OTTO
feminine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Cœur à boulets [...] Les promoteurs de ce genre de réacteur [THTR 300] ont imaginé une simplification du système de manutention, qui consiste à faire passer chaque boulet une seule fois dans le cœur (variante OTTO ou once through then out). Il suffit alors de recueillir, dans une sorte de pondoir, les boulets usagés, mais si l'on gagne en simplicité du système, la combustion massique du combustible déchargé n'est plus uniforme et l'utilisation du combustible n'est donc pas optimale. 2, record 2, French, - concept%20du%20passage%20unique
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2017-04-19
Record 3, English
Record 3, Subject field(s)
- Nuclear Fission Reactors
Record 3, Main entry term, English
- pebble bed reactor core
1, record 3, English, pebble%20bed%20reactor%20core
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
- pebble reactor core 1, record 3, English, pebble%20reactor%20core
correct
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
In the monolithic type pebble bed reactor, the dimension of the reactor core diameter becomes large, and nuclear control for a large-sized reactor having a large output scale is insufficient in a cooled state using only control elements(control rod, boron sphere) inserted into the reflector region. Furthermore, a reactor core control rod, which is forcibly inserted directly into the reactor core, is required in addition to the control elements inserted into the reflector region by gravity drop only. Moreover, cases have been reported that fuel spheres are broken if the control rod is inserted forcibly into the core because the pebble reactor core is full of fuel spheres accumulated inside the reactor core, which causes a serious drawback. 1, record 3, English, - pebble%20bed%20reactor%20core
Record 3, French
Record 3, Domaine(s)
- Réacteurs nucléaires de fission
Record 3, Main entry term, French
- cœur à boulets
1, record 3, French, c%26oelig%3Bur%20%C3%A0%20boulets
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
Dans un HTR [réacteur à haute température], le débit principal d'hélium (plus de 90 % du débit total) sert à refroidir le combustible et le modérateur, qui fournissent respectivement environ 90 % et 10 % de la puissance thermique du cœur. Les débits dérivés refroidissent les barres de contrôle et les structures latérales, dont le réflecteur. Dans un cœur à boulets, le réglage fin du débit par zone radiale de puissance n'est pas possible de par la conception. 1, record 3, French, - c%26oelig%3Bur%20%C3%A0%20boulets
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2017-04-19
Record 4, English
Record 4, Subject field(s)
- Nuclear Fission Reactors
Record 4, Main entry term, English
- prismatic block core
1, record 4, English, prismatic%20block%20core
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
- prismatic core 2, record 4, English, prismatic%20core
correct
Record 4, Textual support, English
Record number: 4, Textual support number: 1 OBS
... where the PBMR [Pebble Bed Modular Reactor] employs a dynamic core of fuel spheres, the GT-MHR adopts a "prismatic" core design, in which hexagonal fuel blocks are located in channels within a fixed graphite core. 2, record 4, English, - prismatic%20block%20core
Record 4, French
Record 4, Domaine(s)
- Réacteurs nucléaires de fission
Record 4, Main entry term, French
- cœur à blocs prismatiques
1, record 4, French, c%26oelig%3Bur%20%C3%A0%20blocs%20prismatiques
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- cœur prismatique 1, record 4, French, c%26oelig%3Bur%20prismatique
correct, masculine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 OBS
La construction et l'exploitation du réacteur de 20 MW de puissance thermique, Dragon Reactor Experiment, à Winfrith (Grande-Bretagne) qui a divergé en 1964 avec un cœur constitué de blocs prismatiques contenant des particules combustibles de carbure d'uranium et de thorium [...] 1, record 4, French, - c%26oelig%3Bur%20%C3%A0%20blocs%20prismatiques
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2009-10-10
Record 5, English
Record 5, Subject field(s)
- Properties of Fuels
- Nuclear Fission Reactors
Record 5, Main entry term, English
- pebble fuel element 1, record 5, English, pebble%20fuel%20element
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 CONT
Concentration profiles of Cs, Eu and Sr in the outer fuel free shell of an AVR pebble fuel element(17. 6% fima, initial U-235/total heavy metal ratio=0. 17). 1, record 5, English, - pebble%20fuel%20element
Record 5, French
Record 5, Domaine(s)
- Propriétés des combustibles
- Réacteurs nucléaires de fission
Record 5, Main entry term, French
- boulet
1, record 5, French, boulet
correct, masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 CONT
Mise en forme de l'élément Combustible. La réalisation de l'élément combustible consiste à disperser le plus régulièrement possible les particules dans une matrice de graphite. Cette matrice est :- soit cylindrique, dans le cas du concept à blocs prismatiques et compacts;- soit sphérique, dans le cas du concept à boulets. La hauteur d'un compact est de 50 mm environ pour un diamètre de l'ordre de 12 mm. Chaque compact contient de 2 000 à 6 000 particules environ. Le diamètre des boulets allemands est de l'ordre de 60 mm. Le combustible sous forme de boulet (combustible du PBMR) est formé d'une zone externe corticale d'environ 5 mm d'épaisseur ne contenant pas de particules et d'une partie interne qui contient environ 12 000 particules. 1, record 5, French, - boulet
Record number: 5, Textual support number: 2 CONT
Les deux procédés de référence sont : - l'injection à chaud [...] - le pressage à chaud, utilisé notamment par les Allemands pour la fabrication des boulets de l'AVR et du THTR (réacteur industriel prototype allemand arrêté en 1989 [...] 1, record 5, French, - boulet
Record 5, Spanish
Record 5, Textual support, Spanish
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