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RadNet HAZARDOUS MATERIALS BUSINESS PLAN MRI Manual / Regulatory Affairs Original Effective Date: April 28, 2021 • The annular space is evacuated and contains multilayer insulation. • Helium is typically withdrawn as a liquid but may be withdrawn as a gas at low flow rates and pressure. • Multiple pressure relief devices are installed on these liquid containers to protect against overpressure. • A 1 psig relief valve SV-3 protects the vessel from overpressure during shipment and storage. • When the container is placed in service, an isolation valve V-3 is closed to isolate this pressure relief valve. • An 8 psig relief valve SV-2 now limits the vessel pressure. • This permits the vessel to be pressurized to just under 8 psig to enhance the removal of liquid helium. • The transfer tube has a 10 psig relief valve SV-1 to protect the container from any back pressure from the filling operation. • A rupture disk, RD-1, protects the outer vessel. Liquid Helium Container Design Features 3!8"Adapter Isolation Valve 112"Adapter (Creen Handle) C-1 C-2 -,/a"Adapter C-3 31ti"Adapter C-4 ,-- Liquid Access Valve(white l landle) V-3 V-1 tvw 10 prig Rel iet Vahte 1 prig Relief Valve SV-1 SV-3 30"-U-30 psig Gauge (91.- I-1 4— 8 Ixig Relief Valve V-2 SV-2 112" FNPI RD-1 �Annulus Kupture Disk Vent Valve (Yellow Handle) Note: Feu 1;)f),250,and 500 liter containers,four adapter Annular Space sizes are provided as shown in figure 1. Smaller containers.30,60,and 100 liter are supplied with 3/H'- and /H"and 1/7" adapters. The user of any cryogenic liquid container should be thoroughly familiar with the product and the mechanical workings of the container before using the product. The appropriate liquid helium valve positions are shown in the image below. Valve handles on the container are color coded green, yellow and white. 5