| Introduction | Outline of Facilities | Brochures | Publications |
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History
| Year | JRR-3 | JRR-4 | NSRR | The tandem accelerator facility | The Radioisotope Production Facility |
| 1956 | Jul.27 ； Construction of homegrown reactor decided. | ||||
| 1957 | June isotope center concept (Atomic Energy Commission) | ||||
| 1958 | |||||
| 1959 | Dec. ； 2MV Van de Graaff(to Mar.2003) | ||||
| 1960 | Mar. ； 5.5MV Van de Graaff(to Sep. 1998) | ||||
| 1961 | March Construction of RI examination manufacturing facility | ||||
| 1962 | Sep.12 ； First criticality | Apr.7 ； Permitssion of reactor construction Jun.； Reactor construction work starts. |
Test manufacture of the short life RI is carried out. | ||
| 1963 | Oct.28 ； Power-up test to 4MW | ||||
| 1964 | Mar.31 ； Rated power of 10MW achieved. | ||||
| 1965 | Nov.11 ； Integrated power reaches 10,000MWh | Jan.28 ； First criticality. | |||
| 1966 | Apr.4 ； Shielding experiment fo atomic-powered ship starts. | ||||
| 1967 | Apr.6 ； Use of homegrown fuel starts. | ||||
| 1968 | Sep.20 ； Integrated operation time reaches 10,000 hrs. | ||||
| 1969 | Mar.6 ； Irradiation test for BNCT Mar.28 Low-temperature-fissiochemical-loop(LTFL)completed. |
Mar.1 ； Training reactor engineers starts. | |||
| 1970 | |||||
| 1971 | |||||
| 1972 | |||||
| 1973 | |||||
| 1974 | Oct.13 ； The sacred fire of the National Athletic Meet in Ibaraki lighted.  |
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| 1975 | Sep.23 ； Integrated power reaches 10,000MWd. | Feb.7 ； Integrated power reaches 10,000MWh. | Jun.11 ； First criticality Fresh fuel experiments(Phase I Program) starts.  |
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| 1976 | Oct.28 ； Rated power of 3.5 MW achieved. | Feb. ； Accelerator ordered(NEC in USA) Dec. ； Construction of tandem building starts. |
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| 1977 | Jul.5 ； Silicon irradiation starts. | Dec. ； Pressure vessel installed. | |||
| 1978 | Nov. ； Tandem building completed. Dec. ； High voltage test starts. |
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| 1979 | |||||
| 1980 | May.22 ； 1,000 pulse operation achieved | Jul. ； Beam test starts. | |||
| 1981 | |||||
| 1982 | Feb.5 Dry-storage-facility(DSF) completed. | ||||
| 1983 | Mar.25 ； End of Joint-use operation. | Aug. ； Accelerator accepted. Sep. ； Steady operation starts. |
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| 1984 | Dec.9 ； Permission for modification | ||||
| 1985 | Aug.5 ； Modification starts | Mar.11 ； International course of reactor engineering education starts. | |||
| 1986 | From October to November ； Removal of reactor core all in one piece  |
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| 1987 | Extension of the house for glared sample acceptance accompanying JRR-3 reconstruction | ||||
| 1988 | Mar.23 ； Integrated power reaches 40,000MWh. | ||||
| 1989 | Modification of experimental facilities and reactor control system for Phase II Program completed. Spent fuel experiments (Phase II Progtram) starts. Jul.5 ； 2,000 pulse operations achieved. |
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| 1990 | Mar.22 ； First criticality with modified JRR-3 Sep.7 ； A hundred hour continuous operation with maximum power of 20MW achieved. Nov.5 Joint-use operation starts. |
Aug. ； Construction of booster building starts. | |||
| 1991 | |||||
| 1992 | Mar.6 ； Integrated power reaches 50,000MWh. | Apr. ； Booster building completed. | |||
| 1993 | Sep.23 ； Integrated power reaches 10,000MWd. | Oct. ； Booster accelerator completed. | |||
| 1994 | Oct. ； Beam acceleration test with booster completed. | ||||
| 1995 | |||||
| 1996 | Jan.12 ； End of operation by HEU fuels(Integrated power 58,706MWh). Sep.19 ； Permission of revised construction-application for modification. |
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| 1997 | |||||
| 1998 | Jan.7 ； Permission for using silicide fuels | Jul.14 ； First criticality with LEU fuel core.  Oct.6 ； joint-use oeration restarts. |
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| 1999 | |||||
| 2000 | |||||
| 2001 | |||||
| 2002 | Jun. ； Expanding tandem accelerator building starts. | ||||
| 2003 | Feb.； Formation of a super mirror of a thermal neutron lead pipe Mar.； Rearrangement of cold-neutron lead pipe C2-3 port by a neutron vendor |
Transfer acceptance of RI training section of Tokyo Komagome | |||
| 2004 | Dec.22 ； 3,000 pulse operations achieved. | ||||
| 2005 | Dec.23 ； Modification of experimental facilities for Phase III Program completed. | Installation of RNB accelerator completed. |
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| 2006 | Jun.； Integrated power reaches 50,000MWd. | High burnup fuel and MOX fuel experiments (Phase III Progtam) starts. | |||
| 2007 | Aug.； The American Nuclear Society landmark prize award | ||||
| 2008 | |||||
| 2009 | Apr.；The Atomic Energy Society of Japan atomic power history construction prize award （in japanese） | Apr.；The Atomic Energy Society of Japan atomic power history construction prize award （in japanese） | Apr.；The Atomic Energy Society of Japan atomic power history construction prize award （in japanese） | Apr.；The Atomic Energy Society of Japan atomic power history construction prize award （in japanese） | |
| 2010 | |||||
| 2011 | |||||
| 2012 | |||||
| 2013 | |||||
| Year | JRR-3 | JRR-4 | NSRR | The tandem accelerator facility | The Radioisotope Production Facility |
