29th Symposium on Fusion Technology (SOFT 2016)

P2.003 Technical rehearsal of DT operation at JET

6 Sep 2016, 14:20

1h 40m

Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Board: 3

Poster A. Experimental Fusion Devices and Supporting Facilities P2 Poster session

Speaker

Eva Belonohy (JET Exploitation Unit)

Description

The final phase of the JET Programme in Support of ITER plans to operate with 100% Tritium (TT) followed by Deuterium-Tritium (DT) operation, to help minimise risks and delays in the execution of the ITER Research Plan and the achievement of Q~10. Additional technical requirements (compared to Deuterium operation) are needed to allow operation with Tritium gas, a high DT neutron flux and neutron activation. These additional requirements include (1) the supply with Tritium of both neutral beam boxes and five new gas introduction modules, (2) the access restrictions to personnel to key operational areas and computer systems for prolonged duration, (3) the depression and oxygen depletion to 15% of the torus hall, (4) the daily regeneration of the divertor and neutral beam cryo-pumps and (5) additional operational procedures and experiment preparations for the accounting of the tritium inventory and neutron activation. As part of the preparation for the TT and DT campaigns at JET, an 8-week technical rehearsal of the procedures and systems to be used in these campaigns is planned in 2016. The aim is to characterise the NBI performance with a Tritium-like gas feed configuration and to rehearse the operation of the technical systems, to test operational procedures and most importantly to gain experience and make recommendations for the preparation of future Tritium campaigns on JET. This contribution will give an overview of the preparation carried out for the DT rehearsal and the results obtained and lessons learned from the technical rehearsal itself. This work has been carried out within the framework of the Contract for the Operation of the JET Facilities and has received funding from the European Union’s Horizon 2020 research and innovation programme. The views and opinions expressed herein do not necessarily reflect those of the European Commission.