JET engineering development towards D-T operations in an ITER-like machine configuration
The Joint European Torus (JET) has recently begun a series of experiments with deuterium-tritium plasmas (DTE1). These are the first plasma experiments with a 50:50 deuterium-tritium (D-T) mixture in a tokamak with a divertor. The extensive technical work to ensure that the JET machine and its major subsystems were able to carry out an extended period of D-T operation is described. This includes the JET active gas handling system (AGHS) and its commissioning to full closed-cycle operation. The modifications to bring the neutral beam injection (NBI) system to full tritium compatibility and its commissioning are described. JET had to be subjected to extensive deterministic analyses of design basis accidents (DBA) to establish changes required to protection systems for D-T operation and to satisfy the regulatory authorities. An example of the practical consequences of these analyses and a discussion of the methodology is included. The history of a successful plant intervention to repair a small water leak in the tritium neutral injector is discussed. The success of the exhaust detritiation systems (EDS) in keeping environmental discharges to below management limits in this exercise, and the lessons learnt generally, are also presented.
Bibliographic Reference: Report: JET-P(97)43 EN (1997) 18pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
Record Number: 199810256 / Last updated on: 1998-03-09
Original language: en
Available languages: en