HYDROGEN CRYOGENIC MODERATOR

Project name: Hydrogen Cryogenic Moderator

Location: Oxfordshire, UK

Client name: ISIS/Science and Technology Facilities Council (STFC)/UK Research and Innovation (UKRI)

Sectors: Cryogenics, Vacuum, Materials research

Year of completion: 2021

 

After the successful delivery of the methane transfer line for client ISIS/UK Research and Innovation (UKRI) at its Oxfordshire facility, Hyspex took on this complex cryogenics installation project following a competitive tender process.

As part of a multi-million-pound refurbishment of its target station equipment, the UKRI required manufacture and installation of a new hydrogen moderator to operate in a high-pressure (8 bar), low-temperature (20K) environment.

Hyspex was contracted to manage the end-to-end production of aluminium and stainless steel components – from research and development and prototyping, through machining and cleaning of components, to welding and testing. Our specialist testing regime included pressure testing, thermal shock testing to ensure the integrity of all parts and welds at sub-zero temperatures, and helium leak detection.

Hydrogen carries a high risk of explosion, so the design had to incorporate three layers of containment: an inner vessel to house liquid hydrogen, an intermediate vacuum layer for insulation and an outer layer filled with helium. Connections with the surrounding components within the target station were also complex. Around 145 individual items had to be fabricated using CNC machining and TIG welding to meet parameters fixed by the client, including tight tolerances of a maximum of 0.3mm. Each part was cleaned to remove contaminants, and tested to ensure performance.

Quality assurance was key for the client, and was incorporated into each stage of production through compliance with client quality management plans. We also presented the client with full certification, product data and testing results upon completion.

Hyspex Limited

Unit 4 Block B, Westpark, Chelston
Wellington, Somerset TA21 9FN

Hyspex Limited

Unit 4 Block B, Westpark, Chelston
Wellington, Somerset TA21 9FN