Abstract: Abstract: During the construction of nuclear island, cable opening and plugging is a necessary link in cable laying works, which plays an important role in maintaining the integrity of fire compartment boundary, preventing the spread of fire and preventing biological shielding. In this paper, the technical scheme of cable opening plugging for HTGR nuclear island is discussed in detail, the special requirements and solutions of high temperature reactor opening plugging are summarized, and a suit of cable opening plugging scheme which is suitable for HTGR nuclear island is put forward in order to get a good application in later engineering practice.

Key words: high temperature air?cooled reactor, nuclear island, cable opening, fire plugging, biological shielding