Categorical Exclusion Determination
Office of NEPA Policy and Compliance
August 4, 2015
Estimated Read Time min
The proposed action would replace the Materials and Fuels Complex (MFC) building MFC-752 Analytical Laboratory (AL) argon header rupture disc (LAR1-PSE-109) with a relief valve to prevent argon loss from the system in an over-pressure event. Previously, when the rupture disc ruptured, all argon was relieved from the argon header and air was allowed to enter the piping system and associated equipment and instrumentation. A relief device would protect against over-pressure then seal off when pressure falls below the trip set-point of the valve, preventing air from entering the system. A flow measuring device to measure the argon flow rate into the AL would also be installed.