NOVELTY - The reactor has a reactor vessel (16) comprising a combustion reaction zone (24) defined by a rotatable burner (26) on an upstream side of the combustion reaction zone, where the burner rotates within the vessel to reduce formation of burn channels in fuel held in the vessel. The vessel comprises a carbon layer support (32) and an ash collection zone (46) positioned downstream from the carbon layer support, where a pyrolysis reaction zone (20) is positioned upstream of the combustion reaction zone. The combustion reaction zone is positioned upstream of the carbon layer support.    USE - Controlled zone gasification reactor for use in a plasma assisted gasification reaction system i.e. modular synthetic gas (syngas) powered power generation system, for converting fuel i.e. biomass, into electricity by producing syngas to replace need for petroleum based fuels to engines e.g. diesel engines and turbine engines.    ADVANTAGE - The reactor allows a gasification system that uses household rubbish as shredded fuel to create clean syngas, thus reducing diesel fuel consumption in power generation by up to 90 percent, and eliminating rubbish with minimal contaminant discharge in the air. The gasification system reduces contaminates in syngas, thus producing a syngas that requires less filtering and more readily usable in an engine without requiring extensive filtering. The gasification system produces the syngas with specific contaminates, thus resulting in less contamination buildup in the engine in which syngas is used. The reactor allows a syngas heater to improve the work efficiency of the engine without negatively impacting the reactor vessel. The gasification system can be a modular system housed within a frame facilitating relatively easy transportation. The gasification system facilitates easy shipment over land, sea, rail or air. The burner can be rotatable within the reactor vessel so as to prevent formation of burn channels within the fuel. The cooling systems within the gasification system can be operated until the reactor vessel is cold so as to prevent damage.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a reactor vessel of a plasma assisted gasification system.    Plasma assisted gasification system (10)    Reactor vessel (16)    Pyrolysis reaction zone (20)    Combustion reaction zone (24)    Rotatable burner (26)    Carbon layer support (32)    Ash collection zone (46)