Proposal to negotiate an amendment to an existing contract for the supply of collimators for the LHC

This document concerns the proposal to negotiate an amendment to an existing contract to include the supply of 85 additional collimators for the LHC. For the reasons explained in this document, the Finance Committee is invited to approve an amendment to an existing contract with the firm CERCA (FR) for the supply of 85 additional collimators for an amount of 2 384 618 euros (3 652 280 Swiss francs), not subject to revision, bringing the total to 3 506 791 euros (5 371 000 Swiss francs). The exchange rate used is that stipulated in the tender.