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VV and Installing Testing Facility

Scientific objectives

   Provide a full-scalesimulated environment for the assembling and testing of parts and system:blanket, divertor, RH, diagnosis, and auxiliary heating.

  Perform research andtesting for: RH assembly and disassembly, in-site dimension detection andquality control, mechanical and thermal load experiments.

   Develop the manufacturingtechnologies for VV, in-vesselcomponents and their supports.

System Description andmain parameters

TheVV and installing testing facility consist of the following parts


1)1/8 VV mockup, flange covers, support for VV and auxiliary support: providea full-scale simulated environment and develop the related manufacturingtechnologies. The key design parameters andtechnical indicators are shown in Table 1.

Table 1. The main designparameters and technical indicators.


2)In-vessel components and the supports: performresearch and testing for RH assembly and disassembly, in-site dimensiondetection and quality control, and develop the related manufacturingtechnologies. The key technologies for in-vessel components and the supportsare as follows:

(a)Thepositioning accuracy of the in-vessel components and their supports is ±3mm;

(b) About 80% welds of the in-vessel components and their supports can bewelded automatically, and the diameter range of weldable pipes is 10mm to 300mm;

(c) Real-time NDT can be performed for the welds withthickness of 1mm-20mm.

3)Platforms for RH, working and visiting channel: provideauxiliary facilities for RH and working.

Key Technologies

Thefollowing key technologies are expected to be developed and improved byconstructing the VV and installing testing facility:

Ÿ   Alarge-view-field datum network and high-precision assembly

Basedon the structural characteristics and assembly accuracy requirements of the VVand installing testing facility, a variety of measuring instruments are usedfor measurement to establish a large-view-field datum network with highmeasurement accuracy, wide measurement range, strong flexibility, and nomeasurement blind zone, which ensures the installation accuracy of the facilitycomponents and the positional accuracy of the in-vessel components and theirsupports.

Ÿ   Automaticwelding system for in-vessel pipework

Inresponse to the engineering requirements of the in-vessel pipework, theflexible assembly welding fixtures and automatic welding system are used tocomplete the assembly of the pipes with multiple stations and narrow space, andthe automatic welding of L-shaped, S-shaped, and U-shaped pipes.

Ÿ   In-sitereal-time NDT system

Comprehensivelyconsidering the requirements of the narrow detection space, detectionefficiency and radiation protection, digital X-ray (DR) real-time imaginginspection system and ultrasonic phased array real-time imaging inspectionsystem are used to detect the welds of pipework with diameter of 10mm to 300mmand thickness of 1mm to 20mm.

Ÿ   In-sitecutting and correction system

In-sitecutting and correction system can machine the welding defects of the in-vesselcomponents and their supports, and locally correct the dimensions in time ifnecessary.


CFETRProject Schedule

Theoverall project schedule is 5 year and 8 months which is required by central government.The detail schedule of each system is as following: