Operation and maintenance experience from the HTTR database

Atsushi Shimizu, Takayuki Furusawa, Fumitaka Homma, Hiroyuki Inoi, Masayuki Umeda, Masaaki Kondo, Minoru Isozaki, Nozomu Fujimoto, Tatsuo Iyoku

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The Japan Atomic Energy Agency has been establishing a database of operation and maintenance experience for the High Temperature Engineering Test Reactor. The objective of this database is to share information from operation and maintenance experience and make use of the knowledge gained in the design, construction, and operation of future High Temperature Gas-cooled Reactors (HTGRs). Between 1997 and 2012, more than 1000 events have been registered in this database system.This paper describes trends in operation and maintenance events recorded in this database, including experience gained from the Great East Japan Earthquake. The paper also identifies the following significant items that are expected to be useful in the design of future HTGRs: (1) performance degradation of helium gas compressors, (2) malfunction of the reserved shutdown system in the reactivity control system, (3) problems with emergency gas turbine generators, and (4) consequences of the Great East Japan Earthquake.

Original languageEnglish
Pages (from-to)1444-1451
Number of pages8
Journaljournal of nuclear science and technology
Issue number11-12
Publication statusPublished - Dec 2 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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