GB/T 13629-2023Criteria for programmable digital devices in safety systems of nuclear power generating stations (English PDF)

1 Scope

This document specifies the design guidelines for programmable digital equipment used in nuclear power plant safety systems, including safety system guidelines, monitoring command equipment

The function and design requirements of the actuator, the function and design requirements of the actuator, and the requirements for the power source:

This document applies to programmable digital devices in nuclear power plant safety systems:

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations

For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document:

GB/T 12727-2017 Qualification of safety-level electrical equipment for nuclear power plants

GB/T 13284:1-2008 Nuclear power plant safety system Part 1: Design criteria

GB/T 13625-2018 Seismic appraisal of safety-level electrical equipment in nuclear power plants

GB/T 22032-2021 System and software engineering system life cycle process

NB/T 20448-2017 Verification and validation of nuclear power plant systems and software

3 Terms and definitions, abbreviations

3:1 Terms and definitions

The following terms and definitions apply to this document:

3:1:1 safestatesafestate

A system state that is considered safe in its application scenario or a system condition that is consistent with the safety analysis of a nuclear power plant:

3:1:2 functionalstate functionalstate

The operating state of a component or system specified by the programmable digital device (PDD) design:

Note: Including operating mode, fault tolerance mode, and test/diagnosis/fault detection mode:

3:1:3 firmwarefirmware

A combination of a hardware device and computer instructions and data that reside on the device as read-only software:

Note: For consistency with this document, firmware is treated as software in a programmable device:

3:1:4

In order to ensure that commodity-level items can perform their intended safety functions, the important design, materials and performance of the items need to be verified (including the design process) […]