Radiation effects on the mechanical properties of insulators for fusion magnets

Humer, K.; Bittner-Rohrhofer, K.; Fillunger, H.; Maix, R.; Prokopec, R.; Weber, H.W.

doi:10.1016/j.fusengdes.2006.07.065

Cited by 20 publications

(17 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also the 40 % system (T2) shows quite a similar radiation resistance, whereas the ILSS of systems with a lower CE content (T8 (30) and T10 (20)) drops by 45 %. Compared to the results of conventional epoxy resins, such as the TFMC systems, the least radiation resistant blend (T10) has still better mechanical properties, even after exposure to a 4 times higher neutron fluence [1,2,6].…”

Section: Interlaminar Shear Strengthmentioning

confidence: 91%

“…In order to find a suitable insulation system for the ITER toroidal field coils, which would withstand high radiation levels, extensive research was carried out over the past years [1][2][3][4][5][6]. It turned out that innovative resin mixtures containing cyanate ester (CE) showed excellent properties after exposure to the ITER design fluence of 1x10 22 m -2 (E>0.1 MeV) compared to traditional epoxy resins.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical Behaviour of Cyanate Ester∕epoxy Blends After Reactor Irradiation to High Neutron Fluences

Prokopec¹,

Humer²,

Fillunger³

et al. 2008

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

The mechanical strength of conventional epoxy resins drops dramatically after irradiation to a fast neutron fluence of 1x10 22 m -2 (E>0.1 MeV). Recent results demonstrated that cyanate ester / epoxy blends were not affected at this fluence level. The aim of this study is to investigate the performance potential of these blends at higher fluence levels without significant degradation of their mechanical properties. Short-beam shear as well as static tensile tests were carried out at 77 K prior to and after irradiation to fast neutron fluences of up to 4x10 22 m -2 (E>0.1 MeV) in the TRIGA reactor at ambient temperature (340 K). In addition, load controlled tension-tension fatigue measurements were performed, in order to simulate the pulsed operation conditions of a tokamak. Initial results show that only a small reduction of the mechanical strength under static and dynamic load is observed at a fast neutron fluence of 2x10 22 m -2 (E>0.1 MeV). After exposure to 4x10 22 m -2 (E>0.1 MeV) the interlaminar shear strength of materials with a cyanate ester content of 40 % or more is only reduced by 20 % to 30 %.

show abstract

Section: Interlaminar Shear Strengthmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Mechanical Behaviour of Cyanate Ester∕epoxy Blends After Reactor Irradiation to High Neutron Fluences

Prokopec¹,

Humer²,

Fillunger³

et al. 2008

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

show abstract

“…During the past years a lot of research has been done in Europe characterizing mixtures of cyanate ester (CE) and epoxy resins in view of the ITER toroidal field (TF) coil insulation [1,2]. A mixture of 40% CE and 60% epoxy turned out to be the best compromise between costs, applicability and radiation resistance.…”

Section: Introductionmentioning

confidence: 99%

Qualification of the resin for the ITER TF coil insulation

Prokopec

Humer

Maix

et al. 2011

Fusion Engineering and Design

Self Cite

View full text Add to dashboard Cite

“…Over the past few years extensive research was carried out in order to find resin systems for the ITER toroidal field coil insulation [1][2][3][4]. It turned out that resin mixtures containing cyanate ester showed excellent properties after exposure to the ITER design fluence of 1x10 22 m -2 (E>0.1 MeV) without any significant indication for radiation induced damage.…”

Section: Introductionmentioning

confidence: 99%

Property Changes of Cyanate Ester∕epoxy Insulation Systems Caused by an Iter-Like Double Impregnation and by Reactor Irradiation

Prokopec¹,

Humer²,

Fillunger³

et al. 2010

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

Evaluation of inter-laminar shear strength of GFRP composed of bonded glass/polyimide tapes and cyanate-ester/epoxy blended resin for ITER TF coils AIP Conference Proceedings 1574, 154 (2014) ABSTRACTBecause of the double pancake design of the ITER TF coils the insulation will be applied in several steps. As a consequence, the conductor insulation as well as the pancake insulation will undergo multiple heat cycles in addition to the initial curing cycle. In particular the properties of the organic resin may be influenced, since its heat resistance is limited. Two identical types of sample consisting of wrapped R-glass / Kapton layers and vacuum impregnated with a cyanate ester / epoxy blend were prepared. The build-up of the reinforcement was identical for both insulation systems; however, one system was fabricated in two steps. In the first step only one half of the reinforcing layers was impregnated and cured. Afterwards the remaining layers were wrapped onto the already cured system, before the resulting system was impregnated and cured again. The mechanical properties were characterized prior to and after irradiation to fast neutron fluences of 1 and 2x10 22 m -2 (E>0.1 MeV) in tension and interlaminar shear at 77 K. In order to simulate the pulsed operation of ITER, tension-tension fatigue measurements were performed in the load controlled mode. The results do not show any evidence for reduced mechanical strength caused by the additional heat cycle.

show abstract

Radiation effects on the mechanical properties of insulators for fusion magnets

Cited by 20 publications

References 19 publications

Mechanical Behaviour of Cyanate Ester∕epoxy Blends After Reactor Irradiation to High Neutron Fluences

Mechanical Behaviour of Cyanate Ester∕epoxy Blends After Reactor Irradiation to High Neutron Fluences

Qualification of the resin for the ITER TF coil insulation

Property Changes of Cyanate Ester∕epoxy Insulation Systems Caused by an Iter-Like Double Impregnation and by Reactor Irradiation

Contact Info

Product

Resources

About