Material Irradiation Technology Using Capsules at HANARO

Cho, Man Soon; Choo, Kee Nam; Yang, Seong Woo

doi:10.13182/nt15-19

Cited by 4 publications

(2 citation statements)

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“…There are several vertical test holes for irradiation testing of nuclear fuels and materials. The characteristics of the reactor test holes at HANARO were previously described elsewhere [4,5].…”

Section: Hanaro and Irradiation Facilitiesmentioning

confidence: 99%

“…Both the general design features and detailed information about this reactor are available on the HANARO homepage (http://hanaro.kaeri.re.kr). To support the national research and development programs on nuclear reactors and nuclear fuel cycle technology in Korea, irradiation capsules have been developed and actively utilized for the irradiation tests requested by numerous users [2][3][4][5][6]. The capsule technology was basically developed for irradiation testing under a commercial reactor operation environment.…”

Section: Introductionmentioning

confidence: 99%

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Design Optimization of HANARO Irradiation Capsule for Long-Term Irradiation Testing

Choo

Cho

Yang

et al. 2018

Science and Technology of Nuclear Installations

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As HANARO has been recently required to support new R&D relevant to future nuclear systems requiring much higher neutron fluence, two types of bottom rod tip of the capsule were preliminarily prepared. The first one is a conventional design made of STS304 and welded using a tungsten inert gas (TIG) welding method. The other is a new design made of STS316L and welded using electron beam (EB) welding to strengthen the fatigue property of the rod tip. During the out-pile testing, they failed after 40 and 203 days, respectively. The fracture surfaces were examined using microscopes and the maximal applied stresses were estimated. The combination of these stresses was proved to be sufficient to cause a fatigue failure of the rod tip of the capsule. Based on the failure analysis, an optimized design of the rod tip of the capsule was made for long-term irradiation testing. It was designed to improve the welding and fatigue properties, to decrease the applied stress on the rod tip, and to fundamentally eliminate the effect of residual stress due to welding. The newly designed capsule was safely out-pile-tested up to 450 days and will be utilized for HANARO irradiation testing.

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Section: Hanaro and Irradiation Facilitiesmentioning

confidence: 99%