Tritium Injection into the JET Tokamak
JET is the only tokamak capable of Deuterium-Tritium (D-T) operations. The first D-T operations were in the 1990s and again in 2004. In 2020/2021 JET operated a much larger D-T campaign aimed at sustained high fusion power requiring a much higher tritium throughput. This paper presents an overview of the recent Tritium Injections into the JET Tokamak from an operational point of view. Tritium injection into the JET Tokamak involves Tritium Gas Injection Modules (TIMs) and Neutral Beam Injectors (NBIs), their control, gas inventory (pre-pulse estimate, post-pulse usage), gas limits (explosive, tritium) etc. Operations require close collaboration of staff in the JET Control Room, the Active Gas Handling System (AGHS), vacuum, and cryogenic groups.