Study of a methodology of identifying important research problems by the PIRT process

Takayuki Aoki, Toshiyuki Takagi, Ichiro Komura, Takashi Furukawa, Noritaka Yusa, Ryoichi Urayama

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In this paper, we propose a new methodology of identifying important research problems to be solved to improve the performance of some specific scientific technologies by the phenomena identification and ranking table (PIRT) process which has been used as a methodology for demonstrating the validity of the best estimate simulation codes inUS NuclearRegulatory Commission (USNRC) licensing of nuclear power plants. The new methodology makes it possible to identify important factors affecting the performance of the technologies from the viewpoint of the figure of merit and problems associated with them while it keeps the fundamental concepts of the original PIRT process. Also in this paper, we demonstrate the effectiveness of the new methodology by applying it to a task of extracting research problems for improving an inspection accuracy of ultrasonic testing or eddy current testing in the inspection of objects having cracks due to fatigue or stress corrosion cracking.

Original languageEnglish
Pages (from-to)832-844
Number of pages13
Journaljournal of nuclear science and technology
Issue number6
Publication statusPublished - 2014


  • Accuracy
  • Crack detection
  • Crack sizing
  • Eddy current testing
  • Fatigue
  • Influential factor
  • Inspection
  • PIRT
  • SCC
  • Ultrasonic testing

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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