Within the framework of the European fusion strategy, two tritium Breeder Blankets concepts are developed to be tested in ITER as Test Blanket Modules (TBM): the Water-Cooled Lithium-Lead (WCLL) which uses the liquid Pb-16Li as a breeder, neutron multiplier and tritium carrier, and the Helium-Cooled Pebble-Bed (HCPB) with lithiated ceramic and beryllium pebbles as breeder and neutron multiplier, respectively, and helium purge gas as tritium carrier. Both concepts consider as structural material reduced activation ferritic martensitic steel, the EUROFER97 (X10CrWVTa9-1). Pressurized water (15.5 MPa, 295−328 °C for WCLL) and pressurized helium (8 MPa, 300−500 °C for HCPB) are foreseen for heat removal.

The TBM is constituted of a BOX (side caps, first wall), stiffened by stiffening plates (SP) and closed on its back, in the manifold area, with back plates with passing-through elements, like stiffening/tie rods, SP nozzles and inlet/outlet water/He pipes. Internally, breeder units, delimited by SP, are cooled-down by cooling plates for the HCPB and double-wall tubes for the WCLL.

This paper describes manufacturing technologies for the TBM and deals with the definition of the preliminary Welding Procedure Specifications (pWPS) and feasibility mock-ups for the manifold area and TBM BOX assembly. The transfer and validation of the pWPS developed for the TBM, from P91 to EUROFER97 steel, is demonstrated. Consolidation of the pWPS for the TBM BOX assembly made with HIP process and development for the HCPB TBM manifold area elements, based on GTAW technique, are discussed. Manufacturing tests are performed using the EUROFER97 steel (RCC-MRx, AFCEN Code rules [1]).

As part of the WCLL conceptual design development activities, an assembly and manufacturing welding sequence is detailed, focusing on design changes and the impact on the selection of manufacturing technologies.

The article will present as well the future fabrication developments and the associated design proposals envisaged on TBM.

在欧洲融合战略的框架内，开发了两种tri育种毯概念，可以在ITER中作为测试毯模块（TBM）进行测试：水冷锂铅（WCLL），它使用液态Pb-16Li作为育种剂，中子倍增器和tri载体，以及分别以氦化的卵石床（HCPB）和锂化的陶瓷和铍石作为增殖剂和中子倍增器，以及氦吹扫气体作为tri载体。两种概念都将减少活化的铁素体马氏体钢EUROFER97（X10CrWVTa9-1）视为结构材料。预计可以使用加压水（WCLL为15.5 MPa，295-328°C）和加压氦气（对于HCPB为8 MPa，300-500°C）来散热。

TBM由一个BOX（侧盖，第一壁）组成，通过加劲板（SP）进行加固，并在歧管区域的背面封闭，并带有带有穿过元件的背板，例如加劲/拉杆，SP喷嘴和入口/出口水/氦气管道。在内部，以SP分隔的种猪单元通过HCPB的冷却板和WCLL的双壁管进行冷却。

本文介绍了TBM的制造技术，并讨论了初步焊接工艺规范（pWPS）的定义以及歧管区域和TBM BOX组件的可行性模型。演示了为TBM开发的pWPS从P91到EUROFER97钢的转移和验证。讨论了采用HIP工艺制造的TBM BOX组件的pWPS的合并以及基于GTAW技术开发的HCPB TBM歧管区域元素的开发。制造测试使用EUROFER97钢（RCC-MRx，AFCEN代码规则[1]）执行。

作为WCLL概念设计开发活动的一部分，详细介绍了组装和制造焊接顺序，重点是设计变更和对制造技术选择的影响。

本文还将介绍有关TBM的未来制造发展以及相关的设计建议。