East Hall under construction 1962 East Area Renovation

East Hall under construction - 1962 East Area Renovation Project : Gas Systems E. Harrouch

Index 1. Situation before LS 2 2. Work foreseen during LS 2 This presentation is a summary of the following documentation : • EDMS : Gaz requirements from experiments in the East Area by Henric Wilkens, David Jaillet, Erwan Harrouch https: //edms. cern. ch/document/1907906/1. 0 • EDMS : Renovation of the gas distribution of the East area by David Jaillet https: //edms. cern. ch/document/1907011 E. Harrouch, 10 -05 -2019 EARP Safety Status 2

Situation before LS 2 CLOUD Dewar LN 2, LO 2 Gas delivery point Gas supply building (N 2, Ar, CO 2, H 2, CLOUD trace gases, C 2 H 2 F 4, SF 6, …) T 11 T 10 Mixing area T 9/T 10 T 9 • The East Area is supplied by a mixing areas and gas piping network coming from a dedicated gases supply building located outside b. 157. E. Harrouch, 10 -05 -2019 EARP Safety Status 3

Work foreseen during LS 2 CLOUD Dewar (LN 2 and LO 2) and mixing area 157 Neutral area N 2, Ar, CO 2, He T 9 T 10 T 11 Cherenkov’s Ar CO 2 N 2 He C 2 F 2 F 4 SF 6 Y Y Y Y Y H 2 157 Flammable and heated gases CLOUD H 2 Flammable or heated gas (Rack 1) Flammable or heated gas (Rack 2) Y Y(back up) Y Y Flammable or heated gas (Rack 3) LN 2 LO 2 Y Y(Option) • The content of gas supply building located outside will be dismantled. The building will be equipped with new gas supply components with remote monitoring as well as purge system with the possibility to recover Green House Gases (GHG). E. Harrouch, 10 -05 -2019 EARP Safety Status 4

Work foreseen during LS 2 T 9 • The mixing panels allow the users mix all the gases provided by the gas supply building with control on the pressure and flow, • A dedicated rack will supply the 4 Cerenkov in the experimental areas (Ar, CO 2, optional refrigerant gases). E. Harrouch, 10 -05 -2019 EARP Safety Status 5

Organisation and planning • Gas building (EN-EA): • Dismantling : Jul 2020 – Aug 2020 • Installation : Aug 2020 – Oct 2020 • Mixing area (EN-EA): • Dismantling : Done • Installation : Oct 2020 • Gas Safety systems installation (Flammable gas safety file: Gas Barrack and Mixing Area after LS 2 (Bt. 157) https: //edms. cern. ch/document/1909603) • Gas detection systems (BE-ICS) – Installation : Jan 2021 • ATEX ventilation (EN-CV) - Installation : Nov 2020 E. Harrouch, 10 -05 -2019 EARP Safety Status 6

Thanks for your attention ! E. Harrouch, 10 -05 -2019 EARP Safety Status 7