MICE hydrogen review Approval process

Process Working group Document pack PPD Director & ISIS Director Prerequisite testing Completed action list Approval What does approval mean? - Operate with hydrogen - Full experimental operation

Working group Action list – Outcomes of this review – HAZOP 2 – Others at the discretion of the group Commissioning progress report – Photographic evidence – Visits when appropriate to witness commissioning / tests Schedule update

Document list Updated risk assessments – General – DSEAR Testing certificates for new equipment – Pipework pressure / leak tests, weld X-rays – Certificates of conformity, material certificates – Calibration certificates Technical files for pressure equipment – PD5500 calculations – Drawings and descriptions – Relevant certificates as above Updated operating procedures, P&ID and zone drawing

Prerequisite testing Leak and pressure testing of all relevant systems Ventilation system commissioned Vacuum / purge systems commissioned Successful automated sequence runs with helium – Helium fill sequence (warm) – Vent sequence – Purge sequence What won’t be tested – Liquid level sensor – Hydrogen fill sequence (helium comes from a different valve, so needs a separate sequence) – Operation in a magnetic field

Sign-off As before, signatures from: – MICE project manager – Working group chair – ISIS director – PPD director