T/CPSS 1009-2022 Fusion over-current protection system explosion switch test specification

Scope

Scope: This document specifies the performance test requirements and methods for explosion switches in fusion loss-of-cooling protection systems. This document is applicable to the testing of explosion switches in fusion loss-of-cooling protection systems. For explosion switch testing in other fields, this document can be referenced for implementation. Main technical content: The purpose of this standard is to provide standard and scientific test items, test methods, and test result judgment criteria for the performance testing of explosion switches used in fusion loss-of-cooling protection systems, and to provide reference for explosion switch testing in other fields. The explosion switch of the fusion loss-of-cooling protection system is a mechanical switch driven by detonating explosives, whose main function is to provide protection and backup protection for superconducting magnets. During the operation of the superconducting magnets in the fusion device, once the loss of cooling occurs, the DC fast circuit breaker in series with the explosion switch should be immediately disconnected, forcing the energy dissipation resistor connected in parallel with it to enter the circuit to limit the current of the superconducting magnets and transfer the energy to the energy dissipation resistor, avoiding damage to the superconducting magnets due to overheating. If the DC fast circuit breaker cannot be reliably disconnected, the explosion switch will be immediately triggered to forcibly connect the energy dissipation resistor to the circuit through the detonating explosives, thereby protecting the superconducting magnets. As the last barrier for protecting the superconducting magnets, the reliable disconnection capability of the explosion switch is extremely important for the safety of the superconducting magnets in the fusion system. Before its operation, a series of performance tests should be strictly carried out to ensure the protection function of the explosion switch f

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