GB/T 43257.6-2023Safety test methods for transport packages of radioactive material—Part 6: Thermal test (English PDF)

Foreword

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

This document is Part 6 of GB/T 43257 "Safety Test Methods for Transport Containers of Radioactive Materials". GB/T 43257 has been released The following sections are included.

---Part 1. General provisions;

---Part 6. Heat resistance test.

Introduction

The inherent safety of radioactive material transport containers is a prerequisite for the safety of radioactive material transport and needs to withstand normal transportation conditions and transport Verification of various tests under accident conditions.

GB/T 43257 is aimed at various verification tests of different types of transport containers. It is necessary to clarify the status of the transport containers participating in the test and the detailed tests.

Conditions, test equipment and equipment, test implementation and testing, data processing methods, test qualification evaluation and many other specific contents, as This is an important supplement to the implementation of GB 11806-2019 "Regulations for the Safe Transportation of Radioactive Materials", making relevant test assessments more specific and standardized.

Therefore, the safety test method for radioactive material transport containers specifically guides various types of transport containers to carry out corresponding verification tests for the design of the containers.

It is of great significance in terms of planning, verification and evaluation.

GB/T 43257 is planned to consist of 11 parts.

---Part 1. General principles. The purpose is to clarify whether radioactive material transport containers will withstand normal transport conditions and transport accident conditions. Below are the general requirements for various tests.

---Part 2. Water spray test. The purpose is to standardize and guide radioactive material transport containers to withstand water spray tests under normal transport conditions. Test and assessment.

---Part 3. Accumulation test. The purpose is to standardize and guide radioactive material transport containers to withstand stacking tests under normal transport conditions. Test and assessment.

---Part 4. Drop test. The purpose is to standardize and guide radioactive material transport containers to withstand normal transport conditions and transport accidents.

Tests and assessments such as free fall, penetration and breakdown-tearing under certain conditions.

---Part 5. Impact test. The purpose is to standardize and guide radioactive material transport containers to withstand impact tests under transport accident conditions. Test and assessment.

---Part 6. Heat resistance test. The purpose is to standardize and guide the heat resistance and heat resistance of radioactive material transport containers under transportation accident conditions. Strengthen heat resistance test assessment.

---Part 7. Water immersion test. The purpose is to standardize and guide radioactive material transport containers to withstand water immersion under transport accident conditions. There is no and enhanced water immersion test assessment.

---Part 8. Shielding test. The purpose is to standardize and guide radioactive material transport containers to withstand normal transport conditions and transport accidents. Shielding test after conditioning.

---Part 9. Leak test. The purpose is to standardize and guide radioactive material transport containers to withstand normal transport conditions and transport accidents. Leakage test under conditions.

---Part 10. Vibration test. The purpose is to standardize and guide the vibration test of the vibration effects of radioactive material transport containers Assessment.

---Part 11. Heat transfer test. The purpose is to standardize and guide the transport containers of radioactive items so that the effects of decay heat of the contents cannot be ignored. Heat transfer test assessment.

GB/T 43257.6 establishes the available Three different test methods were selected for the heat resistance test of radioactive material transport containers. pool fire, heating furnace, and electric heat radiation. The heat resistance test has high Warm heat sources are inherently dangerous. Users are responsible for taking appropriate safety and health measures and using safety equipment that is consistent with the corresponding hazard level.

Complete procedures and equipment to ensure that the safety of personnel and property is fully protected. GB/T 43257.6 and GB/T 43257.1 "Transportation of Radioactive Materials" Container Safety Test Methods Part 1: General Principles" together constitute the heat resistance test method suitable for evidence collection of radioactive material transport containers.

1 Scope

This document specifies the test principles, test conditions, instruments and equipment, test samples, test procedures, and test procedures for heat resistance testing of radioactive material transport containers. Inspection data processing, quality assurance and control, etc.

This document is applicable to the heat resistance test of radioactive material transport containers, and the heat resistance test of other equipment shall be carried out accordingly.

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 11806-2019 Regulations for the safe transportation of radioactive materials

GB/T 43257.1-2023 Safety test methods for radioactive material transport containers Part 1: General principles

JJF1262 Armored Thermocouple Calibration Specifications

JJF1637 Calibration Specification for Inexpensive Metal Thermocouples

JJF1664 Calibration Specification for Temperature Display Instrument

JJG368 Calibration regulations for copper-copper-nickel thermocouples for working use

3 Terms and definitions

The following terms and definitions as defined in GB 11806-2019 and GB/T 43257.1-2023 apply to this document.

3.3 The heat generated by the decay of radioactive contents per unit time

4 Test principle

The sample is placed in a high temperature environment such as a pool fire, heating furnace or electric heat radiation where the average temperature throughout the process is not less than 800°C and reaches the specified time.

During the period, through the created thermal radiation environment and measured temperature response results, it is evaluated that the total heat flow of the radiation heat transfer and convection heat transfer reaches or exceeds The total heat flow of thermal radiation and convection heat transfer experienced by it in a hypothetical hydrocarbon fuel-air fire accident.