High heat flux testing of a HIP bonded first wall panel with built-in circular cooling tubes

Joining technologies of reduced activation ferritic/martensitic steel for blanket fabrication

“…The surface roughness measurement was performed by laser microscopy. The mean surface roughness, R a , was measured to be 4-40 m; this was equivalent to that of as-rolled plate and pipe, which is significantly larger than that normally recommended for HIPping [6,7]. These rods were heated up to 773 K in a vacuum level of 6.7 × 10 −3 Pa for degassing.…”

“…The breeding blanket components involve rectangular cooling channels in the first wall to remove the high heat flux from the plasma [5]. Hot isostatic pressing (HIP) is considered to be the most promising method for such a complex structure [6]. It has been shown that the bonding surface should be milled to a roughness of less than several micrometers in order to complete the HIP bonding [6,7].…”

“…Hot isostatic pressing (HIP) is considered to be the most promising method for such a complex structure [6]. It has been shown that the bonding surface should be milled to a roughness of less than several micrometers in order to complete the HIP bonding [6,7]. However, it is necessary for blanket fabrication to joint the rectangular cooling channels, which means that all of the outer surface of the rectangular tubes must be milled before HIP process.…”

High heat flux test with HIP bonded Be/Cu/SS mock-ups for the ITER first wall

“…6. The maximum deformation at a Be tile is 0.868 mm and the maximum total strains were 0.94% at a SS tube and 0.85% at a Cu block, which represents the number of cycles to a failure is about 220 [5,6]. In a similar way, when the heat flux was 2.0 MW/m 2 , the maximum Be temperature is 543.3 • C and the deformation at a Be tile was 1.2 mm.…”

Torsion test technique for interfacial shear evaluation of F82H RAFM HIP-joints

“…To establish the HIPed first wall component, optimization of the processing technique of the HIP method is mandatory and characterization of the HIPed interface is, therefore, important. Specifically, inspection technologies of destructive and non-destructive methods using the small specimen test techniques (SSTTs) are necessary for investigation of quality of joints between the cooling channels, because the HIP joint is located between thin rectangular tubes and plates [3,4] and it is difficult to use destructive investigation techniques such as Charpy impact tests, which require a relatively large specimen, for the inspection of the real components.…”