Speaker
Thibaud Giacomin
(Port Plugs & Diagnostics Integration Division)
Description
ITER Diagnostic Port Plugs will operate with water at high pressures and temperatures. Because of these conditions of operation, the diagnostic Port Plugs are under the French Regulation on Pressure Equipment / Nuclear Pressure Equipment. This paper focuses on the assessments performed in order to substantiate application of Article 2 paragraph II of French decree 99-1046 relieving diagnostic port plugs structures from provisions appearing in Title II and III from above mentioned Decree.
Being close to the plasma, diagnostic Port Plug structures and Diagnostic First Walls (DFW) contain water for cooling during operation. Water is also used for heating during bake -out. Heat extraction studies demonstrate the need to use water pressurized at up to 48 bars and 250 degree. These structures are designated as “Pressure devices” and, therefore, need to follow French regulation.
This paper describes the design of the Port Plug Structure and DFW from a point of view of applicability of Article 2 paragraph II of French decree 99-1046 relieving diagnostic port plugs structures from provisions appearing in Title II and III from above mentioned Decree. Analysis of key loads will be presented to justify the conclusions. Optimisation of the design to ensure a fully safe system over the life cycle will be discussed.
Co-author
Thibaud Giacomin
(Port Plugs & Diagnostics Integration Division, ITER, St Paul Lez Durance, France)