(IT/P2-1) System Engineering and ITER Integration of the EU HCPB Test Blanket Module System

L.V. Boccaccini1), H. Neuberger, Xuezhou Jin, R. Meyder
 
1) Forschungszentrum Karlsruhe, Karlsruhe, Germany

Abstract.  The Helium Coolant Pebble Bed Blanket (HCPB) is a concept of solid breeder blanket that is supported by the EU as candidate for the DEMO reactor. This concept will be tested in ITER in to gain information on in-rector behaviour under typical fusion conditions. The Test Blanket Module (TBM) will be located to occupy a half of a horizontal port of ITER; the TBM will be supported by sever auxiliary systems, dedicated to supply the coolant helium, to extract the tritium produced in the solid breeder beds, to purify the losses of tritium in the main coolant and to perform several measurement campaigns. This paper gives an overview on the recent progress on the engineering of this test systems and its integration in the ITER machine. The Testing Programme foresees the testing of 4 TBM during the first 10 years of ITER operation; dedicated experiments will be performed with the TBM systems to study and compare their response in a relevant fusion environment with the analyses in the fields of neutronics, thermo-mechanics of the solid breeder and multiplier and tritium handling. The engineering design of the HCPB TBM systems and its ancillary loops is mostly concluded and the priority is now on the development and qualification of the fabrication technologies. From calculations point of view, the last modelling efforts related to the thermal-hydraulic and the thermal and mechanical resistance in accidental conditions of the first wall are presented. In particular the arrangement of the components in the ITER building is critical; the design has to provide for the integration of several components, instrumentation, control systems in different locations (Vacuum Vessel, Port Cell, TCWS vault, Tritium Building, etc.) and to cope to the remote handling requirements for the Port Plug and Hot Cell. Furthermore, all these systems require mechanical, hydraulic and electrical connections to the supporting structures, the water and power supply lines in ITER. The development of diagnostics and measurement systems is a strategic task to gain the required information from the tested systems. Their design, the compatibility with ITER conditions (electromagnetic, neutronic, thermal compatibility), as well the integration in the TBM design are issues. Finally, safety and licensing analyses necessary to include the TBM systems in the ITER preliminary safety report (RPRS) are discussed.

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