SMR 21/09/2017 P. Fessia

General SMR status 11 SMRs created Published in https://espace.cern.ch/HiLumi/WP15/Lists/List_SMR/AllItems.aspx Basics of Space Modification Request It shall be generated when the installation volume, allocated in the baseline to an equipment/system, shall be changed and that such change has an impact on other WP/systems/infrastructure. In specific cases, it could be used to track changes also if changes do not impact other WP/systems/infrastructure SMR summarizes the Reasons of changes The list of changes The impact on cost and planning in particular focusing on project cost and schedule variance (also putting in evidence limitations of damages in case the variation is adopted) Responsibility: the WP asking for the space allocation change. Integration can be exceptionally responsible in very complex cases, but normally it is not Responsible shall find the information in due time and keep the document updated When approved by the Project Office triggers the HL-ECR Aim to make it easer and faster to get to the HL-ECR. To be seen if the objective is reached

Status N object 2 UL displacement P5 3 UL displacement P1 4 Underground infrastructure P1 5 Underground infrastructure P5 6 PM17 infrastructures 7 PM57 infrastructure 8 SD57 cryo routing under floor 9 Technical galleries and HL building interfaces P5 10 11 Modification loading carrying structure SD 17 and SD metallic structure 12 Modification loading carrying structure SD 57 and SD metallic structure

UL SMR The reasons

It is proposed to change move the cores of 4 m toward the LHC arc . Proposed change It is proposed to change move the cores of 4 m toward the LHC arc . This impacts civil engineering, cable routing path and the QXL path. Impact on the LHC infrastructure removal. (This impact is there as soon as we move of 1 m) WP6a estimate that 4 m are enough to cover all possible future needs In addition the UL of the left side is moved of other 2 m (not the cores only the UL) to make fully symmetric the QXL installation around the IP

What is asked today? As SMB would like to move ahead on sound basis for the discussions with the consultant. They ask the release of this necessary change in order to proceed If the approval is granted we will modify the SMR into ECR and we will proceed for its formal approval