Projekt

Neutronics modelling of ITER CTS diagnostic

Udbyder

Vejleder

Sted

København og omegn

Background

DTU is presently developing the Collective Thomson Scattering (CTS) diagnostic instrument for the ITER fusion reactor to measure plasma densities and velocities. While the overall project involves several departments at DTU, the emphasis in this bachelor project will be on radiation physics and is carried out at DTU Nutech.

To install the CTS instrument at ITER one needs to penetrate the blanket. Changes to the blanket may impact radiation levels throughout the tokamak and its instrumentation. In particular, the mirrors of the CTS instrument will be subject not only to the microwaves that the mirrors are constructed to reflect, but also to high energy (MeV range) neutron and gamma radiation. This radiation results in nuclear heating and it is at this point an open question whether or not the mirrors need active cooling to prevent structural damages due to stress inflicted by temperature gradients across the mirror.

Obviously, the answer to this question may have consequences impacting other aspects of the CTS design, so it is of utmost importance that this topic be addressed sooner rather than later.

Project description

In the Bachelor project the student will be given a simplified model to simulate the CTS port plug of the ITER geometry. Among the first tasks will be to validate this model against the official model supplied by ITER. By this, the level of accuracy is established and the student can proceed to make changes to the geometry to implement mirrors according to present and alternative designs. From the calculated heat-load across the mirrors it should be determined whether active cooling is required to ensure the functionality of the mirrors.

Project outline

1) Based on a geometrical, structural and plasma description of the ITER tokamak a simplified simulation setup is provided. Use this as a baseline model, and implement the mirror (geometry and materials) according to best present design.

2) Compare neutron and gamma flux calculations to the official ITER MCNP model to validate the simplified model, using the Source Surface Write capability of MCNP

3) Use Monte Carlo methods to calculate heat load across the involved mirrors. This will serve as an important input to the evaluation whether active cooling of the mirrors is needed.

4) If time permits, the first steps toward calculation of shut-down dose rates in the vicinity of the CTS diagnostic will be initiated

Forudsætninger

Basic to intermediate programming skills

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Kontakt

Virksomhed/organisation

DTU Nutech

Navn

Esben Bryndt Klinkby

Stilling

Seniorforsker

Mail

esbe@dtu.dk

Vejleder-info

Bachelor i Fysik og Nanoteknologi

Vejleder

Esben Bryndt Klinkby

Medvejledere

Erik Nonbøl

ECTS-point

15

Type

Bachelorprojekt

Bachelor i General Engineering

Vejleder

Esben Bryndt Klinkby

Medvejledere

Erik Nonbøl

ECTS-point

15

Type

Bachelorprojekt

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

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dtu@dtu.dk

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