HJ 1114-2020
Technical Specifications for Radiation Environmental Protection of Associated Radioactive Materials Storage and Solid Waste Landfill (Trial) (English Version)

Standard No.

HJ 1114-2020

Language

Chinese, Available in English version

Release Date

2020

Published By

Professional Standard - Environmental Protection

Latest

HJ 1114-2020

Introduction

Analysis of the core content of the standard

Management links	Key indicators	Special requirements
Site selection	Distance between foundation layer and groundwater ≥3m	Avoid active fault zones/hundred-year flood lines
Impeccable system	Permeability coefficient of double artificial lining ≤1×10-12cm/s	Thickness of primary and secondary linings ≥2.0mm
Monitoring period	Regular monitoring for 30 years	Detection of Radon Emission Rate/γ Dose Rate

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Detailed Explanation of Key Technical Terms

4.1.3 Three Simultaneous Principles

Pollution prevention and control facilities must be designed, constructed and put into operation simultaneously with the main project. Typical case: A rare earth smelter built a tailings reservoir with an anti-seepage coefficient of 1×10^-12cm/s.

6.2.4 Anti-seepage System Architecture

Natural foundation layer + Clay anti-seepage layer + Double artificial lining form a composite barrier. The practice of a zirconium mine shows that this structure can reduce uranium leakage by 99.7%.

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Implementation recommendations

1. Materials with uranium activity > 400Bq/g need to have their protection levels upgraded
2. Landfills should be equipped with a leakage detection layer (Clause 6.2.6)
3. Establish an electronic record system for radioactive waste

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Analysis of standard evolution

Compared with GB 23727 uranium ore standard, this specification innovatively proposes:

• Expand the applicability to 16 types of non-uranium ores
• Clarify the technical parameters of double artificial lining
• Introduce a 30-year monitoring period system

HJ 1114-2020 Referenced Document

• GB 18871 Basic standards for protection against ionizing radiation and for the safety of radiation sources
• GB 23727 Regulations for radiation protection and radiation environment protection in uranium mining and milling*， 2020-10-11 Update
• HJ/T 61 Technical criteria for radiation environmental monitoring

HJ 1114-2020 history

• 2020 HJ 1114-2020 Technical Specifications for Radiation Environmental Protection of Associated Radioactive Materials Storage and Solid Waste Landfill (Trial)

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