Analysis of DD, TT and DT Neutron Streaming Experiments with the ADVANTG Code

Abstract

The paper presents an analysis of DD, TT and DT neutron streaming benchmark experiments with the recently released hybrid transport code ADVANTG (AutomateD VAriaNce reducTion Generator). ADVANTG combines the deterministic neutron transport solver Denovo with the Monte Carlo transport code MCNP via the principle of variance reduction. It automatically produces weight-window and source biasing variance reduction parameters based on the CADIS (Consistent Adjoint Driven Importance Sampling) methodology. Using this novel hybrid methodology Monte Carlo simulations of realistic complex fusion streaming geometries have become possible. In this paper the experimental results from the 2016 DD campaign using measurements with TLDs and activation foils up to 40 m from the plasma source are analyzed. New detailed models of the detector assemblies were incorporated into the JET 360° MCNP model for this analysis. In preparation of the TT and DTE2 campaigns at JET a pre-analysis for these campaigns is also presented.

Nuclear Data Uncertainty Propagation in Complex Fusion Geometries

“…All uncertainties connected to the JET3-NEXP streaming experiment [1,2] must be determined in order to assure benchmark quality data. The experimental locations in two distinct regions of the JET tokamak hall South West Labyrinth (A1-A8, B8) and South East Chimney (B1-B7) are shown in Figure 3.…”

“…The JET3-NEXP streaming benchmark experiment [1,2] consists of thermoluminescent and activation foil measurements in the JET torus hall up to 40 m away from the plasma source, which are computationally supported using Monte Carlo, deterministic and hybrid transport simulations. The aim of the experiment is to provide experimental results and computational models suitable for benchmarking new nuclear data (ND) and transport codes in complex, realistic fusion geometries.…”

Fusion Neutron-Induced Soft Errors During Long Pulse D–D Plasma Discharges in the WEST Tokamak

“…D-D reactions will therefore be used during ITER development and commissioning before introducing tritium fuel. Because both D-D and D-T operations produce a high flux of energetic neutrons, creating a residual neutron field outside the reaction chamber [5,6], the electronics for command control and diagnosis of all future fusion devices will be exposed to nuclear radiation and negatively affected by this environment. Investigations are necessary to quantify such radiation effects on electronics devices, circuits and systems in the perspective of qualification procedures and guidelines [7].…”