Radial plates for the ITER toroidal field coils
The main objective of this contract is to produce the radial plates (RP), which constitute the main structural component of the TF coil winding pack (WP) on the basis of the technologies qualified during the prototyping phase. All the needed prototyping phase information will be made available by Fusion for Energy.
A radial plate (RP) is a d-shaped stainless steel plate, (about 13.4 m x 8.7 m x 0.12 m overall dimensions) profiled to contain on each side spiral round-shaped grooves. The grooves are closed by cover plates (CP).
The radial plates are part of the ITER toroidal field (TF) coils. The circular superconductors of the TF coils, once electrically insulated, are inserted into the grooves of the radial plates. One RP with the inserted and insulated conductor assembled is called a double pancake (DP). In order to successfully fit the conductor into the radial plate groove, its trajectory must fit quite precisely the radial plate grooves path.
After the insertion of the conductor in the grooves, the CPs are positioned and laser welded to the radial plate and then the DP is impregnated. Once formed, seven DP are stacked and impregnated together to form the winding pack.
Considering that F4E is supplying 10 TF coils, and each coil is composed of 5 regular DP and 2 side DP, the ultimate scope of the procurement procedure is the supply of 70 radial plates: 50 rRP and 20 sRP (10 left sRP and 10 right sRP), including their cover plates, as well as spare raw material as backup. For this purpose two alternative scenarios are envisaged by Fusion for Energy, corresponding to the Lots described in Annex B (1), Annex B (2) and Annex B (3):
— Scenario 1: awarding of lot 1.
Or.
— Scenario 2: awarding of lot 2 and lot 3.
Each radial plate will be manufactured according the following sequence:
1. The radial plate will be machined according to nominal dimensions leaving an amount of over-metal all around it. The radial plate will be manufactured by butt-welding different sections by utilizing for the welding either narrow gap TIG or local vacuum electron beam.
2. For each radial plate F4E will supply to the RP supplier a spline representing the centerline of the groove trajectory to utilize for that radial plate (based on as-built dimension of the double pancake).
3. The RP supplier will generate, based on the spline, a CATIA model and a manufacturing drawing representing the radial plate.
4. After F4E approval, the RP supplier will complete the machining of the radial plate based on this drawing as well as the cover plates. The machining will be completed with a portal machine. Fusion for Energy will make available one portal machine used for machining one of the prototypes. Technical specifications of the portal machine will be communicated to the candidates during the dialogue phase.
5. The time to complete the machining will be imposed by F4E based on ITER schedule needs.
Slightly different sequences might be defined during the dialogue phase.
Plazo
El plazo para la recepción de ofertas era de 2011-12-12.
La contratación se publicó en 2011-11-03.
Proveedores
Los siguientes proveedores se mencionan en decisiones de adjudicación u otros documentos de contratación:
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Historial de adquisiciones
| Fecha |
Documento |
| 2011-11-03
|
Anuncio de licitación
|
| 2012-11-19
|
Anuncio de adjudicación de contrato
|