The design decisions of breeding zone sub-module for testing in ITER in order to validate the CHC TBM concept

Russian Federation has adopted the strategy to participate in the TBM Program on the rights of “Partner” in the development of ceramic helium-cooled (CHC) test blanket module (TBM) concept. In this connection one of the possible collaboration scenarios is to integrate the characteristic design element of RF concept in the structure of “Leader's” TBM and to test it in ITER environment. According to the collaboration in the framework of Test Blanket Working Group (TBWG) the “Leader” and “Partner” should develop together the selected (DEMO-relevant) TBM concept which will not disturb the ITER operation. Because of the analogue in the design principles, testing objectives and parameters of the EU CHC TBM concept (“Leader”) and of the RF one, the RF specialists have developed the design options of breeding zone sub-module (BZSM) to be integrated in one of the EU TBM cells for further testing in ITER. There are four BZSM design options (according to four types of TBM to be tested) have been developed. Brief explanation of RF strategy in the partnership for the development of CHC blanket concept is presented in this paper. This paper also contains the description of all the four BZSM designs and some technological features.