GB/T 42142-2022Analysis criterion for radiation source term in auxiliary and secondary coolant system of pressurized water reactor nuclear power plant (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 for Standardization Documents" drafting.

1 Scope

This document specifies the methods to be followed in the analysis of the radiation source items of the auxiliary system and the secondary circuit system of the pressurized water reactor nuclear power plant under normal operating conditions. and assumptions.

This document is applicable to the analysis of the radiation source item of the auxiliary system and the secondary circuit system of the pressurized water reactor nuclear power plant under normal operating conditions.

2 Normative references

This document has no normative references.

3 Terms and Definitions

The following terms and definitions apply to this document.

4 General rules

4.1 The analysis of the radiation source item of the auxiliary system and the secondary circuit system is applicable to the auxiliary system and the secondary circuit system under the normal operating conditions of the PWR nuclear power plant. System-related radiation safety analysis and shielding design.

4.2 When analyzing the radiation source item, the calculation and analysis shall be carried out based on the primary circuit design source item. The primary circuit design source item is based on the design basis source item (ie The primary circuit fission product source item corresponding to the design basis cladding damage rate), the transient value of the main coolant radiation source item and the cold shutdown peak.

4.3 The calculation of system and equipment source items should be based on the operating mode of the system, and the calculation model should be able to truly reflect the system function and process flow.

4.4 The process parameters should be selected according to the principle that the shielding design source term can envelop the different source terms that may occur under normal operating conditions.