개질 에폭시수지 및 수소 첨가된 비스페놀-A형 에폭시수지계 차폐재의 열적 및 역학적 성질에 미치는 방사선 영향

조수행; 홍순석; 김익수; 도재범; 노성기

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.3, 524-532, June, 1997

Effects of Radiation on Thermal and Mechanical Properties of Modified Epoxy Resin and Hydrogenated Bisphenol-A Type Epoxy Resin Based Shielding Materials

조수행, 홍순석, 김익수, 도재범, 노성기

초록

방사성물질의 수송 및 저장용기 등에 사용하기 위하여 개발한 개질 에폭시수지 및 수소 첨가된 비스페놀-A형 에폭시수지계 중성자 차폐재들의 열분해온도, 열전도도, 열팽창 등의 열적 성질 및 인장강도, 압축강도, 굴곡강도, 비중, 무게변화, 수소 함량변화 등의 역학적 성질에 방사선이 미치는 영향을 검토하였다. 방사선 조사선량의 증가에 따라 KNS(Kaeri Neutron Shield)-201과 KNS-302 차폐재들의 열분해온도는 증가하는 경향을 나타내었으나, KNS-202와 KNS-301은 0.5 MGy 이상에서는 감소하는 경향을 나타내었다. 또한 방사선 조사선량이 온도에 따른 차폐재들의 무게변화에는 거의 영향을 미치지 않는 것으로 나타났다. 0.1 MGy까지 열전도도는 방사선 조사선량의 영향을 거의 받지 않는 것으로 나타났다. 또한 KNS-301과 302 차폐재들의 열팽창은 KNS-201과 202보다 방사선 영향을 적게 받는 것으로 나타났다. 0.1 MGy까지는 방사선 조사선량의 증가에 따라 KNS-202 및 KNS-301과 302 차폐재들의 인장, 압축 및 굴곡강도는 증가하는 경향을 나타내었다. 반면에 KNS-201은 방사선 조사선량의 증가에 따라 감소하는 경향을 나타내었다. 또한 조사선량의 증가에 따른 차폐재들의 비중, 무게 및 수소함량은 크게 변하지 않는 것으로 나타났다.

Effects of radiation on the thermal and mechanical properties of modified epoxy resin and hydrogenated bisphenol-A type epoxy resin based neutron shielding materials to be used for radioactive material shipping and storage casks have been investigated. The onset temperatures of the shielding materials of KNS(Kaeri Neutron Shield)-201 and KNS-302 increased with the radiation dose, but those of KNS-202 and KNS-301 decreased at radiation dose above 0.5 MGy. In addition, the radiation dose rarely affected the change of weight of shielding materials with the variation in temperature. At radiation dose up to 0.1 MGy, thermal conductivities of shielding materials were not affected. The thermal expansion coefficients of the shielding materials of KNS-301 and 302 were affected to a less extent than those of KNS-201 and 202 by radiation. At radiation dose up to 0.1 MGy, the tensile strength, compressive strength and flexural strength of the shielding materials of KNS-202 and KNS-301 and 302 increased with the radiation dose. In contrast, those of KNS-201 decreased with an increase in the radiation dose. In addition, the amount of radiation dose on the shielding materials did not result in a measurable loss of specific gravity, weight and hydrogen content.

[References]

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[1] Taniuchi H, Iida T, Matsuda F, Nagahama H, IAEA-SM-286, 123 (1987)

[2] Dickson LW, AECL-9556 (1988)

[3] Iida T, Taniuchi H, Fujisawa K, RAMTRANS, 2, 79 (1991)

[4] Saunders CB, Dickson LW, Singh A, AECL-9084 (1987)

[5] Wilski H, Radiat. Phys. Chem., 29, 1 (1987)

[6] Morita Y, Hagiwara M, Kasai N, J. Appl. Polym. Sci., 27, 3569 (1982)

[7] Aleksander JP, Ilhan AA, J. Am. Ceram. Soc., 72, 775 (1989)

[8] Blakely KA, Gaffney MF, Shaffer PTB, Trans. Am. Nucl. Soc., 34, 199 (1980)

[9] Rack HJ, Dupree SA, Smugeresky JF, SAND78-2317 (1979)

[10] Cho SH, Do JB, Ro SG, Do CH, J. Korean Ind. Eng. Chem., 7(3), 597 (1996)

[11] Cho SH, Hong SS, Kim HY, Do JB, Ro SG, J. Korean Ind. Eng. Chem., 8(1), 92 (1997)

[12] Wiberley SE, "Introduction to Infrared and Raman Spectroscopy," ed. N.B. Colthup and L.H. Daly, Academic Press, Inc., San Diego (1990)

[13] Sisman O, Parkinson WW, "Engineering Compendium on Radiation Shielding," Vol. II, Shielding Materials, R.G.Jaegar and A. Hoenig, eds., Springer-Verlag Berlin Heidelberg New York, 294 (1975)

[14] King RW, Broadway NJ, Mayer RA, Palinchak S, "Effects of Radiation on Materials and Components," ed. J.F. Kircher and R.E. Bowman, Reinhold Publishing Corporation, New York (1964)

[15] Burn RR, Blessing GR, Trans. Am. Nucl. Soc., 39, 429 (1981)

[16] Seo KS, Fornes RE, Memory JD, Gilbert RD, Polym. Prepr., 28, 313 (1987)

[17] Wolf KW, Memory JD, Gilbert RD, Fornes RE, J. Appl. Phys., 54, 5558 (1983)