Abstract: There is described a radiation source assembly comprising an elongate radiation source; a reactor port for receiving and reversibly securing the elongate radiation source; a top plug element for reversible connection to a proximal end of the radiation source and reversible engagement with the reactor port; the top plug element configured to be disengaged from reactor port without disengagement of the elongate radiation source from the reactor port.

Abstract: There is described a radiation source assembly comprising an elongate radiation source; a reactor port for receiving and reversibly securing the elongate radiation source; a top plug element for reversible connection to a proximal end of the radiation source and reversible engagement with the reactor port; the top plug element configured to be disengaged from reactor port without disengagement of the elongate radiation source from the reactor port.

Abstract: There is described a cleaning apparatus for a surface (e.g., a radiation source assembly) in a fluid treatment system. A preferred embodiment of the cleaning apparatus comprises: a wiping element for contact with at least a portion of the surface; at least one cutting element connected to the wiping element for cutting elongate debris in contact with the surface; and a motive element for moving the carriage between a first position and a second position. This preferred embodiment of the present cleaning apparatus is particularly advantageous for removing elongate debris from one or more radiation source assemblies disposed in the fluid treatment system. The approach utilized in this preferred embodiment of the present cleaning apparatus is to include at least one cutting element which is moved along the exterior of the radiation source assembly. The cutting element is connected to a wiping element that is translated between a first position and a second position.