Overview of the specialist assessments undertaken to support the JET safety case review

The Joint European Torus (JET) operates using deuterium as a fuel but has also operated in D-T mode where the fusion reaction is fuelled by deuterium and tritium. To justify the safety of the experiments, safety reports are produced and approved. The safety case has recently undergone a periodic safety review and preparations are being made to undertake a tritium campaign in 2015. To provide information regarding the compatibility between reactor-grade plasma and the materials facing the plasma, an "ITER-like wall" was installed in JET comprising beryllium first wall tiles, solid tungsten and CFC tungsten coated tiles in the divertor region. In the prospect of the next D-T campaign with the new wall, the following areas of specialist assessment have been identified: Engineering fit for purpose assessment of key safety related equipment, Human factor assessment of key safety management requirement, This paper will present a status report of these assessments and the methodology applied. Along with the results of a loss of coolant accident (LOCA) analysis using the CEA developed thermal hydraulics code CATHARE 2 V25-2. (C) 2011 Elsevier B.V. All rights reserved.