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Science and Technology of Nuclear Installations
Volume 2015, Article ID 723081, 8 pages
Research Article

Study on the Effects of Liquid Thermal Media on the Irradiation Capsule of High-Temperature Materials

Korea Atomic Energy Research Institute, Daejeon 305-353, Republic of Korea

Received 4 June 2015; Revised 10 August 2015; Accepted 10 August 2015

Academic Editor: Eugenijus Ušpuras

Copyright © 2015 Man Soon Cho et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Irradiation tests of materials at HANARO have usually been conducted using a standard capsule at temperatures of about 300°C for irradiation of materials used at PWR. Thus, the standard capsule uses aluminum as the specimen holder, which acts to dissipate the thermal energy. Future nuclear systems such as a VHTR and SFR require the irradiation tests at a relatively high temperature. As an alternative to aluminum which has been used as the thermal media in a standard material capsule, the characteristics of liquid metals such as NaK and LBE are reviewed. The temperatures of the capsule are affected by the variation of parameters such as the gap and wall thickness of the container. In particular, the external gap is most important in determining the temperature of the specimen. LBE raises the temperature of the specimen higher than NaK at the same configuration of the capsule. Thus, LBE can lessen the gap of the parts and reduce the vibration for a stable long-term test in reactor.