Overview of damage to beryllium limiters by unmitigated disruptions and runaway electrons in the JET tokamak with metal walls

I. Jepu; A. Widdowson; GF Matthews; JP Coad; Likonen, J; S. Brezinsek; M. Rubel; G Pintsuk; P. Petersson; E. Fortuna-Zalesna; J. Grzonka; C. Porosnicu; P. Dinca; O. Pompilian; B Butoi; SG Moga; S. Silburn; S. Kuksenko; E. Alves; N. Catarino; RA Pitts; L Chen; S Ratynskaia.