Abstract

The significant impact brought by a severe nuclear accident at the Fukushima Daiichi Nuclear Power Plant (NPP) in Japan in March 2011 has made global regulators to review the requirements against severe accidents. In China, comprehensive safety inspection and external hazard safety margin assessment on NPPs were carried out, regulatory requirements on improvement measures for NPPs based on the inspection were given, the nuclear safety 5-year plan was made and executed, and the safety requirements on the new NPP design were drafted. The Nuclear Safety Law came into effect in 2018. The “Code on the Safety of Nuclear Power Plant Design” (HAF102) was revised in 2016, and relevant safety guides were developed. In this article, improvement actions and requirements about NPP safety in China over the past 10 years were reviewed, and the nuclear safety philosophy and requirements including practical elimination, classification of accident conditions, and defense in depth portable equipment were elaborated. In summary, some suggestions of NPP safety in China in the future were provided.

Highlights

  • As of October 2021, there were 51 Nuclear Power Plant (NPP) units in operation and 14 units under construction in China (IAEA, 2021)

  • In Qinshan NPP, plant floor elevation is 5.00 m, the design-basis flood (DBF) level is 10.01 m, and the dam elevation of Qinshan NPP is 9.70 m, which means that flood can occur

  • The Nuclear Safety Administration (NNSA) decided to take No SSR-2/1 as a reference, in conjunction with the draft version of safety requirements on new NPP designs, and revise the HAF102-2004 Code on the Safety of Nuclear Power Plant Design

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Summary

Introduction

As of October 2021, there were 51 Nuclear Power Plant (NPP) units in operation and 14 units under construction in China (IAEA, 2021). The 12th Five-Year NSP and another plan developed by the National Energy Administration (NEA), named the Chinese Nuclear Power Safety Plan, set the safety goal for new NPP designs in China for a period in the future; the important ones are as follows:

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