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JAEA Reports

Establishment of the disassembling technique of the driver fuel assembly irradiated in JOYO

Ichikawa, Shoichi; Haga, Hiroyuki; Kikukawa, Kiyohide*; Fukasaku, Hironobu*; Kurosawa, Yoichi*; Katsuyama, Kozo; Maeda, Koji; Nagamine, Tsuyoshi

JAEA-Technology 2011-020, 32 Pages, 2011/07

JAEA-Technology-2011-020.pdf:6.56MB

Disassembling technique of the driver fuel assembly irradiated in the experimental fast reactor JOYO has been established at Fuel Monitoring Facility in JAEA. This technique made it possible to remove the fuel pins from the driver fuel assembly without the fuel pin sectioning. After disassembling the fuel assembly, some selected fuel pins can be reassembled into the new irradiation vehicle for the continuous irradiation at JOYO. This technique enables us to obtain the irradiation data of high burn-up fuel and high neutron dose material.

JAEA Reports

Inspection of secondary cooling system piping of JMTR

Hanawa, Yoshio; Izumo, Hironobu; Fukasaku, Akitomi; Nagao, Yoshiharu; Kawamura, Hiroshi

JAEA-Review 2008-023, 55 Pages, 2008/06

JAEA-Review-2008-023.pdf:5.63MB

Piping condition was inspected form the view point of confirmation of long term utilization before renewal work of secondary cooling system in the JMTR on FY 2008. As the result, it was confirmed that crack, swelling and exfoliation in inner lining of piping could be observed, and corrosion in piping could hardly be observed. Repair of inner lining of piping during refurbishment of the JMTR is necessary to long term utilization of secondary cooling system after restart of the JMTR. In addition, periodic inspection of inner lining condition is necessary after repair of secondary cooling system piping.

Oral presentation

Preliminary inspection of secondary cooling system piping for maintenance plan in JMTR

Hanakawa, Hiroki; Hanawa, Yoshio; Izumo, Hironobu; Fukasaku, Akitomi; Nagao, Yoshiharu; Miyazawa, Masataka; Niimi, Motoji

no journal, , 

The refurbished JMTR will start on FY 2011, and operate for a period of about 20 years. Before this plan, preliminary inspection of secondary cooling system piping was carried out in order to make a maintenance plan. As the results of this inspection, it was confirmed that the corrosion was reached by piping ingot, or decrease of piping thickness could hardly be observed. It was therefore confirmed that the strength or the functionality of the piping had been maintained by usual operation and maintenance. According to the results of this inspection, the basic date for maintenances are confirmed and it is clear to be able to make the maintenances plan in future.

Oral presentation

The Development of a long life control rod in the fast reactor, 5; Dimensional measurement results of shroud tube of sodium bonded type control rod irradiated in Joyo

Donomae, Takako; Katsuyama, Kozo; Tachi, Yoshiaki; Maeda, Koji; Inoue, Takayuki*; Fukasaku, Hironobu*

no journal, , 

no abstracts in English

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