Dynamic simulations of the cryogenic system of a tokamak

Cryogenic Engineering Conference 2015

材料科学;物理学

Cirillo, R.^1 ; Hoa, C.^1 ; Michel, F.^1 ; Poncet, J.M.^1 ; Rousset, B.^1

Univ Grenoble Alpes, INAC-SBT, Grenoble

F-38000, France^1

关键词: Broader Approach;    Cryogenic system;    Experimental test;    Nuclear fusion reactors;    Operating modes;    Pulsed heat loads;    Pulsed load smoothing;    Variable loads;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/101/1/012158/pdf
DOI  :  10.1088/1757-899X/101/1/012158

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Power generation in the next decades could be provided by thermo-nuclear fusion reactors like tokamaks. There inside, the fusion reaction takes place thanks to the generation of plasmas at hundreds of millions of degrees that must be confined magnetically with superconductive coils , cooled down to 4.4K. The plasma works cyclically and the coil system is subjected to pulsed heat load which has to be handled by the refrigerator. By smoothing the variable loads, the refrigerator capacity can be set close to the average power; optimizing investment and operational costs. Within the "Broader Approach agreement" related to ITER project, CEA (Commissariat à l'Energie Atomique et aux Energies Alternatives) is in charge of providing the cryogenic system for the Japanese tokamak (JT-60SA), that is currently under construction in Naka. The system has been designed to handle the pulsed heat loads. To prepare the acceptance tests of the cryogenic system foreseen in 2016, both dynamic modelling and experimental tests on a scaled down mock-up are of high interest for assessing pulsed load smoothing control. After explaining HELIOS (HElium Loop for hIgh lOad Smoothing) operating modes, a dynamic model is presented, with results on the pulsed heat load scenarios. All the simulations have been performed with EcosimPro® and the associated cryogenic library CRYOLIB.