Search Results - "Van Der Hagen, T.H.J.J."

Conceptual design of a passively safe thorium breeder Pebble Bed Reactor by Wols, F J, Kloosterman, J L, Lathouwers, D, van der Hagen, THJJ

“…More sustainable nuclear power generation might be achieved by combining the passive safety and high temperature applications of the Pebble Bed Reactor (PBR)…”
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Analysis of the running-in phase of a Passively Safe Thorium Breeder Pebble Bed Reactor by Wols, F.J., Kloosterman, J.L., Lathouwers, D., van der Hagen, T.H.J.J.

“…•This work analyzes important trends of the running-in phase of a thorium breeder PBR.•Depletion equations are solved for important actinides and a fission…”
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Three-dimensional flow pattern visualization and bubble size distributions in stationary and transient upward flashing flow by Manera, A., Prasser, H.-M., Lucas, D., van der Hagen, T.H.J.J.

“…For the first time, an experimental three-dimensional reconstruction and visualization of stationary and transient flashing flow in a vertical pipe (47 mm…”
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Subchannel void-fraction measurements in a 6 × 6 rod bundle using a simple gamma-transmission method by Kok, H.V., van der Hagen, T.H.J.J., Mudde, R.F.

“…A relatively simple subchannel void-fraction measurement system was developed and applied to a scaled model of a BWR fuel assembly. The measurement system is…”
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Analytical modeling of flashing-induced instabilities in a natural circulation cooled boiling water reactor by Van Bragt, D.D.B., De Kruijf, W.J.M., Manera, A., Van Der Hagen, T.H.J.J., Van Dam, H.

“…A dynamic model for natural circulation boiling water reactors (BWRs) under low-pressure conditions is developed. The motivation for this theoretical research…”
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Space-dependent kinetics simulation of a gas-cooled fluidized bed nuclear reactor by Pain, C.C., Gomes, J.L.M.A., Eaton, M.D., de Oliveira, C.R.E., Umpleby, A.P., Goddard, A.J.H., van Dam, H., van der Hagen, T.H.J.J., Lathouwers, D.

“…In this paper we present numerical simulations of a conceptual helium-cooled fluidized bed thermal nuclear reactor. The simulations are performed using the…”
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An experimental parametric study on natural circulation BWRs stability by Marcel, Christian P., Rohde, M., Van Der Hagen, T.H.J.J.

“…•An experimental loop with artificial neutronic feedback is developed for NC-BWRs studies.•The use of MOX fuels in BWRs may degrade their stability…”
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Uncertainty quantification for criticality problems using non-intrusive and adaptive Polynomial Chaos techniques by Gilli, L., Lathouwers, D., Kloosterman, J.L., van der Hagen, T.H.J.J., Koning, A.J., Rochman, D.

“…► Non-intrusive spectral techniques are applied to perform UQ of criticality problems. ► A new adaptive algorithm based on the definition of sparse grid is…”
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The effects of core zoning on the graphite lifespan and breeding gain of a moderated molten salt reactor by Nagy, K., Kloosterman, J.L., Lathouwers, D., van der Hagen, T.H.J.J.

“…► Material evolution calculations for moderated molten salt reactor. ► Zoning of the core to increase graphite lifespan and/or breeding gain. ► Zoned cores…”
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Flashing-induced density wave oscillations in a natural circulation BWR—mechanism of instability and stability map by Furuya, M., Inada, F., van der Hagen, T.H.J.J.

“…Experiments were conducted to investigate two-phase flow instabilities due to flashing in a boiling natural circulation loop with a chimney at low pressure…”
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Experimental investigations on flashing-induced instabilities in one and two-parallel channels: A comparative study by Marcel, Christian P., Rohde, M., Van Der Hagen, T.H.J.J.

“…In this investigation, experiments conducted in a natural circulation test facility at low power and low pressure conditions, in the one single and…”
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Steady-state and dynamic behavior of a moderated molten salt reactor by Nagy, K., Lathouwers, D., T’Joen, C.G.A., Kloosterman, J.L., van der Hagen, T.H.J.J.

“…•Steady-state and transient coupled calculation scheme.•Study of impact of the substance properties on the operating conditions and on the reactivity feedback…”
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Reactivity control system of a passively safe thorium breeder pebble bed reactor by Wols, F.J., Kloosterman, J.L., Lathouwers, D., van der Hagen, T.H.J.J.

“…•A worth of over 15,000pcm ensures achieving long-term cold shutdown in thorium PBR.•Control rod worth in side reflector is insufficient due to low-power…”
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Methodology for modal analysis at pulsed neutron source experiments in accelerator-driven systems by Uyttenhove, W., Lathouwers, D., Kloosterman, J.-L., van der Hagen, T.H.J.J., Van den Eynde, G., Baeten, P.

“…•Modal analysis of the PNS spatial correction factor (SCF) is performed.•Many modes are needed to obtain a precise PNS SCF for ADS.•For VENUS-F, the PNS SCF…”
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Downscaling a supercritical water loop for experimental studies on system stability by Rohde, M., Marcel, C.P., T’Joen, C., Class, A.G., van der Hagen, T.H.J.J.

“…In industry, supercritical water is being used as e.g. separation agent, solvent or coolant due to the unique fluid properties near the critical point. This…”
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Experimental and numerical investigations on flashing-induced instabilities in a single channel by Marcel, Christian P., Rohde, M., Van Der Hagen, T.H.J.J.

“…During the start-up phase, natural circulation BWRs (NC-BWRs) need to be operated at low pressure conditions. Such conditions favor flashing-induced…”
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Fluid-to-fluid modeling of supercritical water loops for stability analysis by Marcel, C.P., Rohde, M., Masson, V.P., Van der Hagen, T.H.J.J.

“…The use of supercritical water as coolant/moderator may induce oscillations in the supercritical light water reactor similar to the density wave oscillations…”
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Performing uncertainty analysis of a nonlinear Point-Kinetics/Lumped Parameters problem using Polynomial Chaos techniques by Gilli, L., Lathouwers, D., Kloosterman, J.L., van der Hagen, T.H.J.J.

“…► Two spectral techniques are applied to a stochastic nonlinear point-kinetic model. ► Polynomial Chaos approaches are presented and compared to standard UQ…”
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Applying second-order adjoint perturbation theory to time-dependent problems by Gilli, L., Lathouwers, D., Kloosterman, J.L., van der Hagen, T.H.J.J.

“…► A second-order adjoint perturbation method is derived for time-dependent problems ► Second order perturbations can be computed with a set of additional…”
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Effects of random pebble distribution on the multiplication factor in HTR pebble bed reactors by Auwerda, G.J., Kloosterman, J.L., Lathouwers, D., van der Hagen, T.H.J.J.

“…In pebble bed reactors the pebbles have a random distribution within the core. The usual approach in modeling the bed is homogenizing the entire bed. To…”
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