Abstract: A food dispensing machine includes a product chamber with a dispensing valve connected to the product chamber and having an outlet through which a product contained in the product chamber is dispensed. The product chamber has a cleaning solution inlet connectable to a cleaning solution supply source for receiving cleaning solution into the product chamber. The product chamber further has an ingredient inlet alternatively connectable to either an ingredient supply source or the dispensing valve outlet. When the ingredient inlet is connected to the dispensing valve outlet, a re-circulating flow path is created, allowing for complete cleaning and sanitizing of the product flow path.

Abstract: Passive aerosol retention apparatus positioned in the connecting vents of a nuclear reactor containment are described. The aerosol retention apparatus minimizes aerosol transport from the lower drywell to the upper drywell of the reactor containment. The retention apparatus includes a substantially cylindrical housing and a flow modulator positioned inside the housing and extending at least partially from a first end to a second end of the housing. The flow modulator includes a helically shaped baffle positioned in the housing so as to be coaxial with the housing. The baffle is coupled at each end to the housing by attachment bars.