Topics

2010
July 28^th	Specialist Meeting on Under Sodium Viewing System of SFR
March 17^th-18^th	Second Specialist Meeting on In-vessel Inspection and Repair of FBR.
2009
March 19^th	Renewal of containment vessel air ventilation system was carried out
2008
December 9^th	Specialist Meeting on In-vessel Inspection and Repair of FBR.
April 15^th	Science and technology award.
January 15 - February 7	Inspection of the fuel handling equipment was carried out.
2007
December 5^th	Withdrawal of Upper Core Structure Irradiation Plug Rig was carried out.
June 6^th	Celebration of the 30th anniversary of Joyo.
May 15^th	Started the 15th annual inspection.
May 8^th-14^th	The MK-III 6' special cycle was carried out as a short term irradiation test of Minor Actinide (MA) doped MOX fuel.
April 24^th	Tree planting for the 30th anniversary of Joyo's initial criticality.
April 12^th	Completion of the MK-III core 6 duty cycle operation.
March 12^th	At 17:41, accumulated operation time of Joyo reached 70,000 hours from the first criticality on April 24th, 1977
March 7^th	Started up the reactor for the MK-III core 6 duty cycle.
February 2^nd	Completion of the MK-III core 5 duty cycle operation.
2006
December 27^th-29^th	Automatic reactor shutdown due to loss of off-site power caused by lightning strikes. 　　　　　Restarted the reactor on the 27^th of December, and reached rated power on the 29^th of December.
December 11^th	Started up the reactor for the MK-III core 5 duty cycle.
November 17^th	Completion of the MK-III core 4 duty cycle operation.
November 15^th	On November 14th（local time 12:00）, 2006, Joyo’s receipt of the "Nuclear Historic Landmark Award" was announced at the American Nuclear Society (ANS) 2006 winter meeting.
September 16^th	Started up the reactor for the MK-III core 4 duty cycle.
August 21^th-24^th	The MK-III 3-2' special cycle was carried out as a short term irradiation test (irradiation time : 24 hours) of Minor Actinide (MA) doped MOX fuel.
July 28^th	Completion of the MK-III core 3-2 duty cycle operation.
July 15^th-17^th	Automatic reactor shutdown due to loss of off-site power caused by lightning strikes. 　　　　　Restarted the reactor on th e16^th of July, and reached rated power on the 17^th of July
June 6^th	Started up the reactor for the MK-III core 3-2 duty cycle.
May 24^th-26^th	The MK-III 3-1' special cycle was carried out as a short term irradiation test (irradiation time: 10min) of Minor Actinide (MA) doped MOX fuel.
May 15^th	Completion of the 14th annual inspection.
May 10^th	Completion of the MK-III core 3-1 duty cycle operation.
April 27^th	Started the in-pile creep rupture test of the cladding materials using Material testing Rig with Temperature Control -2 (MARICO-2).
April 27^th	Started up the reactor for the MK-III core 3-1 duty cycle.
March 31^st	Completion of concrete cooling system heat exchanger tube replacement under way since October 17^th, 2005.
2005
July 11^th- August 22^th	Installation of the Material Testing Rig with Temperature Control -2 (MARICO-2)
June 3^rd:	JNC signed a contract with the Pacific Northwest National Laboratory (PNNL) for the fabrication of components for irradiation rigs which could be used for materials testing in Joyo.
April 28^th - May 13^th	Withdrawal of the Self-Actuated Shutdown System (SASS) lower guide tube was carried out.
March 29^th	Joyo received the 37th AESJ award for its "Irradiation capability upgrading program for the experimental fast reactor Joyo MK-III project" by Atomic Energy Society of Japan.
January 11^th - April 7^th	Inspection of the fuel handling equipment was carried out.
2004
December 13^th - February 25^th, 2005	Overhaul of the rotating plug was carried out.
November 26^th	Started the 14th annual inspection.
November 15^th-17^th	The MK-III core 2' special cycle was carried out as part of the fuel failure simulation test.
November 11^th-29^th	Fuel failure simulation test was carried out.
October 23^rd	Completion of the MK-III core 2nd duty cycle operation.
August 23^rd	Started up the reactor for the MK-III core 2nd duty cycle.
July 27^th	Completion of the MK-III core 1st duty cycle operation.
June 2^nd	Started SASS stability test.
May 31^st- June 1^st	Characteristic tests of SASS electromagnet at the beginning of 1st duty cycle
May 24^th	Started up the reactor for the MK-III core 1st duty cycle.
April 30^th	PX-Joyo technical information exchange meeting.
March 8^th	Installation of the Self-Actuated Shutdown System(SASS)
January 26^th	Symposium on the Joyo MK-III upgrading to achieve 140MWt.