Machinery and apparatus for filtering or purifying gases

Description

Magnox (MxL) has procured a number of variants of Ductile Cast Iron Containers (DCICs) from Gesellschaft Für Nuklear-Service mbH (GNS). To make these containers suitable for use, it is necessary to fit a vent assembly to prevent any pressure build-up in the package and to ensure the diffusion of flammable gases, typically hydrogen and methane, from the container. The vent must ensure that pressure within the container during normal operations remains below the Pressure Systems Safety Regulations 2000 (PSSR) threshold of 0.5 barg. The vent shall ensure adequate dispersal of flammable gases during storage in the Interim Storage Facility (ISF) such that the atmosphere in the container remains below the appropriate Lower Flammable Limit (LFL). The scope involves supply of batch order Filter Units (up to 900 Nr units) for GNS Yellow Box®, and GNS MOSAIK® EI Vent Assemblies and Vent Assemblies for the GNS MOSAIK® U-EI DCICs and the associated quality assurance records. Magnox, owned by Cavendish Fluor Partnership, is the management and operations contractor responsible for 12 nuclear sites and 1 hydroelectric plant in the UK, working for the sites' owner, the Nuclear Decommissioning Authority All of the common decommissioning projects across the Magnox sites have been grouped into Strategic Programmes. Although every site is different, the core challenges are the same, so tackling work consistently helps drive value and innovation. Magnox (MxL) has procured a number of variants of Ductile Cast Iron Containers (DCICs) from Gesellschaft Für Nuklear-Service mbH (GNS). MxL is using these shielded IP-2 transport containers to package Intermediate Level Waste (ILW) for interim storage and final disposal. To make these containers suitable for use, it is necessary to fit a vent assembly to prevent any pressure build-up in the package and to ensure the diffusion of flammable gases, typically hydrogen and methane, from the container. The vent must ensure that pressure within the container during normal operations remains below the Pressure Systems Safety Regulations 2000 (PSSR) threshold of 0.5 barg. The vent shall ensure adequate dispersal of flammable gases during storage in the Interim Storage Facility (ISF) such that the atmosphere in the container remains below the appropriate Lower Flammable Limit (LFL). The scope involves supply of batch order Filter Units (up to 900 Nr units) for GNS Yellow Box®, and GNS MOSAIK® EI Vent Assemblies and Vent Assemblies for the GNS MOSAIK® U-EI DCICs and the associated quality assurance records.