Multi-module high-temperature gas cooled reactor annular containment

The invention relates to the technical field of nuclear reactor containment vessels, in particular to a multi-module high-temperature gas cooled reactor annular containment vessel which is annular and composed of an outer shell, an inner shell and a dome, the outer shell and the inner shell share the same circle center and are connected into a whole through the dome at the top, and the radius difference of the outer shell and the inner shell is the span of the dome of the annular containment vessel. The span of the dome can be adjusted according to the size of the nuclear steam supply system modules and main related systems and channels. According to the annular safety shell composed of the outer shell, the inner shell and the dome, the span of the safety shell can be greatly reduced, and the complex structure of the dome in the prior art can be simplified; and meanwhile, during open-top hoisting, the dome is arranged in a block mode, the requirements of multiple sets of main equipment for partition and batch