Insensitive electric igniter for nuclear blast valve

Abstract

The invention discloses an insensitive electric igniter for a nuclear blast valve, which is suitable to be used for nuclear power generating units. The electric igniter comprises an electrode plug, a charging cap, a bridge belt and charged powder, wherein the electrode plug, the charging cap, the bridge belt and the charged powder are all arranged in a shell; and the electric igniter is characterized in that the charging cap is made of aluminium oxide ceramics, and an electrostatic discharging channel is formed between an electric contact pin on the electrode plug and the inner wall of the shell by a second disk with minimum diameter on the charging cap, thereby combining the functions of 'blocking' and 'discharging'; the charged powder is a Zr / KClO4 medicament which can bear long-time high temperature and irradiation environment; and the bridge belt is serialized, and can satisfy the applied objects with different dimensional requirements for interfaces. The invention provides an electric igniter which can be used safely and reliably under the harsh operating environment of nuclear power generating units, lives up to the requirements for safety performance of misfiring under the condition of 1A / 1W / 5min, and meets the technical index of no leakage within 15min at an action time of not more than 10ms and under the action of 69MPa pressure when 3.7 A of rated firing current is applied; and meanwhile, the invention has the advantages of simple structure, easy installation, good adaptability to environment, and the like.

Description

technical field [0001] The invention belongs to the technical field of pyrotechnics, and relates to a pyrotechnic initiating element, in particular to an insensitive electric igniter used in a nuclear blasting valve. Background technique [0002] The widespread application of nuclear power technology worldwide and the possible catastrophic consequences of nuclear power plant accidents have drawn attention to nuclear safety issues. With the development of third-generation nuclear power technology, blast valves with igniters as initial ignition components have become popular all over the world. It was first used in a pressurized water reactor nuclear power unit. The blast valve can effectively alleviate and prevent serious accidents such as melting reactors, and is a key safety device for nuclear power units. The use of blast valves reduces the number of safety equipment for nuclear power units and improves the safety and economy of the units. The electric igniter is the initi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an insensitive electric igniter that can meet the requirements of nuclear-grade products for nuclear power blasting valves in view of the problem that the electric igniter in the prior art cannot adapt to the working environment of nuclear power units

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