Sökning: "nitride fuels"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden nitride fuels.

1. 1. Multiscale modeling of nitride fuels

   Författare :Antoine Claisse; Pär Olsson; Janne Wallenius; Per Söderlind; Paul Blair; Paul Erhart; Natalia Skorodumova; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Uranium Nitride Ab Initio Modelling; Fysik; Physics;

   Sammanfattning : Nitride fuels have always been considered a good candidate for GENIV reactors, as well as space reactors, due to their high fissile density, highthermal conductivity and high melting point. In these concepts, not beingcompatible with water is not a significant problem. LÄS MER

3. 2. Experimental and theoretical studies of nitride fuels

   Författare :Merja Pukari; Janne Wallenius; Toru Ogawa; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fast reactor fuel; ab-initio modelling; fuel fabrication; inert matrix nitride fuel;

   Sammanfattning : With respect to nitrides being considered as potential fast reactor fuels, research is conducted on the out-of-pile thermophysical properties, sintering and fabrication processes, gas migration mechanisms, self-diffusion and point defect behaviour of actinide nitrides, their surrogate materials, and the inert matrix material ZrN . The experimental research, carried out in the framework of qualifying fuel for the European Lead Cooled Training Reactor (ELECTRA), shows that sintered ZrN and (Dy,Zr)N pellet densities are influenced by the oxygen concentration in the material. LÄS MER

4. 3. Nitride fuel production by the internal sol gel process

   Författare :Marcus Hedberg; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nitride fuels; ZrN; internal sol gel;

   Sammanfattning : AbstractDuring operation of a fourth generation reactor system it is necessarily not desirable to utilize an oxide fuel matrix as in light water reactor systems. One type of chemical compounds that has been suggested is nitride based nuclear fuel. LÄS MER

5. 4. High Performance Fuels for Water-Cooled Reactor Systems

   Författare :Kyle D. Johnson; Janne Wallenius; James Tulenko; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nuclear fuel; accident tolerant fuel; uranium nitride; uranium silicide; Fysik; Physics;

   Sammanfattning : Investigation of nitride fuels and their properties has, for decades, been propelled on the basis of their desirable high metal densities and high thermal conductivities, both of which oer intrinsic advantages to performance, economy, and safety in fast and light water reactor systems. In this time several key obstacles have been identied as impeding the implementation of these fuels for commercial applications; namely chemical interactions with air and steam, the noted diculty in sintering of the material, and the high costs associated with the enrichment of 15N. LÄS MER

7. 5. Production and Characterization of ZrN and PuN Materials for Nuclear Fuel Applications

   Författare :Marcus Hedberg; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Internal gelation; Carbothermal reduction; Zirconium Nitride; Plutonium Nitride; Nuclear fuel;

   Sammanfattning : At the heart of a nuclear reactor resides its fuel. The chemical composition of the nuclear fuel affects the performance of several key properties important for the overall operation and safety performance of the reactor. LÄS MER