Method of using high pressure liquid nitrogen for cooling reactors.

摘要

A delivery system liquid cryogen comprising: a. an injector tube (10; 215) having a first end and a second end; and b. a source of liquid cryogen to provide a flow of liquid cryogen directly into said injector tube; characterized by c. a drive shaft (30; 230) within said injector tube, being movable said drive shaft toward the first end of said injector tube to stop the flow of liquid cryogen from the first end of said injector tube.