Current design of the European TBM systems and implications on DEMO breeding blanket

•Description of the Helium Cooling Systems of HCLL and HCPB-TBS after the Conceptual Design Review.•Description of the PbLi loop of HCLL-TBS after the Conceptual Design Review.•Description of the possible ROX (Return of Experience) from design and operation of the Test Blanket Systems.•Discussion on the DEBO relevancy of the main technologies adopted in the Helium Cooling Systems and PbLi loop.