Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Mio, Keigo; Ogiwara, Norio; Furukori, Hisayoshi*; Arai, Hideyuki*; Nishizawa, Daiji*; Nishidono, Toshiro*; Hikichi, Yusuke
JAEA-Technology 2009-018, 86 Pages, 2009/04
JAEA-Technology-2009-018.pdf:13.44MB
Material characterization and development has been carried out for cable insulation suitable for use in the J-PARC 3-GeV RCS radiation environment. In spite of its high cost, PEEK (polyether-ether-ketone) has emerged as the leading candidate satisfying requirements of being non-halogen based, highly incombustible and with radiation resistant at least 10 MGy, along with the usual mechanical characteristics such as good elongation at break, which are needed in a cable insulation. 
-ray irradiation tests have been done in order to study radiation resistance of PEEK cable. Further, mechanical, electrical and fire retardant characteristics of a complete cable such as would be used at the J-PARC RCS were investigated. As a result, PEEK cables were shown to be not degraded by radiation up to at least 10 MGy, and thus could be expected to operate stably under the 3-GeV RCS radiation environment.
Ukon, Seiichi*; Ishida, Katsuyoshi*; Takano, Kazuhiko*; Furukori, Hisayoshi*; Kusano, Joichi*
Fujikura Giho, 3(115), p.26 - 30, 2008/12
In general, polymeric cable installed in heavy radiation environment, such as nuclear power plant or radiation research facility as the J-PARC, deteriorates its performance by the effect of radiation damage. The deterioration conducts a decreasing of mechanical property and of flame retardant characteristics that require the replacement of the cable within a certain period of time to keep the basic function as insulation or non-flammability. This report explains the development of radiation resistant polymeric material and cable by the examination of sample -ray irradiation method based on the joint research agreement with JAEA toward the J-PARC application. We studied the irradiation effect in the combination of light stabilizer and ultraviolet absorber. A current non-halogen sheath material was observed severe damage on the mechanical property by the irradiation dose of 0.5 MGy. While the developed material demonstrated excellent performance as the elongation brake at 50%, which corresponding to the self-diameter bending, kept after the irradiation dose of 2.5 MGy. The new cable manufactured with the advanced sheath material maintained at the vertical tray flame test of JIS C 3521, and accomplished to a bending test, in case of the cable was bent to a diameter 4 times of the cable outer diameter, as well as all of the development objectives were achieved successfully after the irradiation dose of 2.5 MGy.
Mio, Keigo; Ogiwara, Norio; Hikichi, Yusuke; Marushita, Motoharu*; Arai, Hideyuki*; Goto, Keiichi*; Nishizawa, Daiji*; Furukori, Hisayoshi*
Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.252 - 254, 2008/00
-Ray irradiation tests of vacuum system equipment were carried out to evaluate radiation resistance for J-PARC 3GeV RCS(Rapid-Cycling Synchrotron). Intense of radiation fields will be expected since large intensity proton beam current of RCS. Regarding Steady operation and radiation protection, radiation hardness is required approximately 10MGy to 100MGy. Cable, Feed-through-connector, Cooling-fan, Baking heater, piping Sealants have been tested. All the examination objects were evaluated to have radiation hardness at least 10MGy and expected to operate with stability under radiation field of 3GeV RCS.
