GB/T 12788-2021Criteria for class 1E power systems for nuclear power plants (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 12788-2008 "Nuclear Power Plant Safety Level Power System Guidelines", compared with GB/T 12788-2008, except for

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) The terms and definitions of "passive reactor design" have been added (see 3.17);

b) An example of a passive nuclear power plant safety-level power system has been added (see Figure 3);

c) Added the description of the safety-level power system of passive nuclear power plants (see 5.1.1);

d) Modify "circuit breaker" to "isolating device" (see 5.2.2.5, 5.3.2.5, 5.2.2.5, 5.3.2.5 of the.2008 edition);

e) The design requirements for the DC power system of passive nuclear power plants have been added (see 5.3.1);

f) The design requirements for battery chargers of passive nuclear power plants have been added (see 5.3.4.3).

Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.

This document was proposed and managed by the National Standardization Technical Committee for Nuclear Instruments (SAC/TC30).

Drafting organization of this document. Shanghai Nuclear Engineering Research and Design Institute Co., Ltd.

The main drafters of this document. Shao Junyun, Ma Tao, Gu Shenjie, Lu Peifang, Tao Guo.

The previous versions of the documents replaced by this document are as follows.

---GB/T 12788-1991, GB/T 12788-2000, GB/T 12788-2008.

Criteria for safety-level power systems of nuclear power plants

1 Scope

This document specifies nuclear power plants.

a) The main design criteria and design measures of the safety-level power system, these criteria and measures can make the safety-level power system in the applicable

Meet its functional requirements under working conditions caused by design basis events;

b) Test and monitoring requirements for safety-level power systems;

c) Criteria for safety-level power systems shared by multi-unit nuclear power plants;

d) Document requirements for safety-level power systems.

This document applies to the safety level parts of the following systems and equipment in single-unit and multi-unit nuclear power plants.

---Instrumentation and Control (I

This document does not apply to priority power sources, generators and busbars of units, generator circuit breakers, main (i.e. step-up) transformers, auxiliary (i.e.

Use) transformers, starting transformers, connecting lines to switchyards of nuclear power plants, switchyards, transmission lines and transmission networks (see Figures 2 and 3).

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 5204 Nuclear Power Plant Safety System Periodic Test and Monitoring

GB/T 7163 Reliability analysis requirements for safety systems in nuclear power plants

GB/T 9225 General Principles of Reliability Analysis of Nuclear Power Plant Safety System

GB/T 12727 Nuclear power plant safety level electrical equipment appraisal

GB/T 12790 Nuclear power plant safety-level electrical equipment and system file identification method

GB/T 13177 Priority power supply for nuclear power plants

GB/T 13284.1 Nuclear Power Plant Safety System Part 1: Design Criteria

GB/T 13286 Nuclear power plant safety level electrical equipment and circuit independence criteria

GB/T 13538 Nuclear power plant containment electrical penetration Application of GB/T 13626 Single Failure Criteria to Safety System of Nuclear Power Plant

GB/T 13629 Applicable criteria for digital computers in nuclear power plant safety systems

GB/T 14546 Recommended implementation method for DC power system design of nuclear power plant

NB/T.20028.1 Storage batteries for nuclear power plants Part 1: Capacity determination

NB/T.20028.2 Storage batteries for nuclear power plants Part 2: Installation design and installation guidelines

NB/T.20028.4 Storage batteries for nuclear power plants Part 4: Maintenance, test and replacement methods

NB/T.20089 Nuclear power plant safety level power system and equipment protection criteria