Design strength evaluation of RC beams under radiation environments for nuclear power plants

Won Hee Kang, Tae Hyun Kwon, Hyeong Tae Kim, Kyoungsoo Park

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Neutron irradiation changes the behavior of construction materials such as strength and ductility, and thus structural design equations or their safety margins should accordingly be updated for the design of nuclear power plants (NPP) under irradiation. However, current design codes do not account for such changes in material strength. In this study, a framework is proposed to evaluate the change of the safety margins in design equations of reinforced concrete (RC) flexural members under radiation environments. Material strength changes are approximated on the basis of a collected test database, and the design strengths of RC beams are evaluated considering these material strength changes. The evaluation results demonstrate that the design strength of an under-reinforced flexural member can increase while the design strength of an over-reinforced member generally decreases. These results are associated with the material strength changes such that the yield strength of steel increases and the compressive strength of concrete decreases with the fluence of neutron radiation. Current NPP design codes need to further consider this un-conservative design possibility due to the design strength reduction of flexural members under irradiation.

Original languageEnglish
Pages (from-to)101-110
Number of pages10
JournalNuclear Engineering and Design
Publication statusPublished - 2016 May 1

Bibliographical note

Funding Information:
Dr. Park and Dr. Kwon acknowledge support from the Korea Institute of Energy Technology Evaluation and Planning (KETEP) through grant# 20121620100040 and the National Research Foundation (NRF) of Korea through grant # 2013M2B2A4041330 . The information presented in this paper is the sole opinion of the authors and does not necessarily reflect the views of the sponsoring agencies.

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Nuclear and High Energy Physics
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Materials Science(all)
  • Nuclear Energy and Engineering


Dive into the research topics of 'Design strength evaluation of RC beams under radiation environments for nuclear power plants'. Together they form a unique fingerprint.

Cite this