Concept

Modérateur (nucléaire)

Publications associées (119)

Development and validation of gamma-heating calculational methods for plutonium-burning fast reactors

The need for accurate calculational tools for the determination of gamma heating in fast reactors has increased considerably in recent years following the planned modification of certain existing fast breeders into plutonium-burning configurations. The lat ...

EPFL1999

A high-fluence 0.6 GeV proton irradiation experiment with thin uranium and thorium targets

Rakesh Chawla

High-fluence proton irradiation experiments with thin actinide targets are part of PSI's programme related to accelerator-based transmutation studies. The aim is to provide experimental data for the validation of theoretical models in nucleon-meson transpo ...

Elsevier1999

Subcriticality measurements using an epithermal pulsed-neutron-source technique in pebble-bed HTR configurations

Rakesh Chawla

The Pulsed-Neutron-Source technique, commonly used for the measurement of the subcriticality of multiplying systems, suffers from the fact that the values of reactivity obtained are dependent upon calculated correction factors and/or kinetic parameters. Ca ...

Elsevier1998

Dynamic structure factor of vitreous silica from first principles: Comparison to neutron-inelastic-scattering experiments

Alfredo Pasquarello, Roberto Car

Using a first-principles approach, we study the vibrational properties of vitreous SiO2 which are measured in neutron-scattering experiments. We adopt a model structure consisting of corner-sharing tetrahedra, which was previously generated using first-pri ...

1998

Latest JET results in deuterium and deuterium-tritium plasmas

Ambrogio Fasoli, Luca Rossi, Dalziel Joseph Wilson, Denis Martin, Hairun Guo

All major JET systems have been fully commissioned for D-T and the DTE1 series of experiments has started with the D-T fuel mixture and operating conditions foreseen for ITER. In the area of ITER physics, significant results have been produced in both D-D ...

1997

High performance Joint European Torus (JET) plasmas for deuterium-tritium operation with the MkII divertor

Ambrogio Fasoli, Laurie Porte, Luca Rossi, Dalziel Joseph Wilson, Denis Martin, Hairun Guo

Planned experiments in the Joint European Torus [Plasma Physics and Controlled Fusion Research, Proceedings, 13th International Conference, Washington, D.C., 1990 (International Atomic Energy Agency, Vienna, 1991), Vol. 1, p. 27] (JET) with deuterium-triti ...

1997

Microstructural evolution adjacent to grain boundaries under cascade damage conditions and helium production

It is well established that clusters of both vacancies and self-interstitial atoms (SIAs) are produced in displacement cascades. Ample evidence has also been presented showing that SIAs produced in the form of small dislocation loops may be highly glissile ...

1996

Defect Microstructure in Copper after Low Fluence Irradiation with 440-Mev Argon and 230-Mev Neon Ions

A saturation of the yield strength appears in the post irradiation hardening of copper irradiated with high energy heavy ions, in the range from 10(-3)-10(-2) dpa. The saturation value of the yield strength is significantly lower than that measured after i ...

1994

In-Beam Fatigue of a Ferritic-Martensitic Steel - First Results

Due to its pulsed operation mode, a fusion device will have to sustain thermal stresses and at the same time be exposed to a flux of 14 MeV neutrons. In order to simulate this irradiation condition, a new irradiation device has been developed, in which the ...

1994

Study of micromixing in polymerization reactions and its application in experimental copolymerization

Albert Renken, Thierry Meyer

The better understanding of the degree of mixing in highly viscous media is of crucial interest with respect to the product quality during a polymn. reaction. A special reactor composed of a loop tubular reactor followed by a tubular part, all being filled ...

American Institute of Chemical Engineers1994

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