사용후핵연료 수송용기에 사용될 수지계 중성자 차폐재 제조 및 특성

조수행; 도재범; 노성기; 도춘호

Journal of the Korean Industrial and Engineering Chemistry, Vol.7, No.3, 597-604, June, 1996

Export Citation

사용후핵연료 수송용기에 사용될 수지계 중성자 차폐재 제조 및 특성

Fabrication and Characteristics of Resin-Type Neutron Shielding Materials for Spent Fuel Shipping Cask

조수행, 도재범, 노성기, 도춘호

초록

사용후핵연료 수송용기 등에 사용되는 수지계 중성자 차폐재, KNS-115A, l15B 및 l15C를 제조하였다. 기본물질은 에폭시수지이며, 첨가제로는 폴리프로필렌, 수산화알루미늄 및 탄화붕소이다. 이들 중성자 차폐재들은 유동성이 좋아 수송용기와 같은 복잡한 구조에 사용할 수 있다. 개발된 중성자 차폐재들의 차폐능, 연소특성, 난연성, 열적 및 역학적 성질 등을 평가하기 위해 여러 특성시험을 행하였다. 개발된 중성자 차폐재(수소원자 밀도, 6.1∼6.2× 10²²atoms/cm³)들은 외국산 중성자 차폐재(NS-4-FR, 6.0× 10²²atoms/cm³)보다 수소원자 밀도가 높아 차폐능이 우수할 것으로 예측되며, 조사된 제반 특성들은 열분해온도; 267∼270℃, 열전도도; 0.62∼0.72W/m·K, 연소특성 ; 800℃ 이하, 평균연소시간 ; 5초 이하, 평균연소길이 ; 5mm 이하, 인장강도 ; 2.3 ∼3.0kg/mm², 압축강도 ; 5.3∼13.3kg/mm², 굴곡강도 ; 4.4∼5.4kg/mm² 등을 나타냈다.

Resin-type neutron shielding materials, KNS-115A, l15B and l15C have been fabricated to be used for spent fuel shipping cask. The base material is epoxy resin, and polypropylene, aluminium hydroxide and boron carbide are added. These shielding materials offer good fluidity at processing, which makes it possible to apply this resin shield to complicated geometric shapes such as shipping cask. Several measurements were made for the shielding materials to evaluate the shielding property, combustion characteristics, fire resistance, thermal and mechanical properties. The neutron shielding ability of the shielding materials is estimated to be better than that of foreign's shielding material, NS-4-FR, due to higher hydrogen atomic density. Other properties of the shielding materials are as follows : Onset temperatures ; 267∼270℃, thermal conductivities ; 0.62∼0.72W/m·K, combustion characteristics ; <800℃, ATB(average time of burning) ; <5sec, AEB(average extent of burning) ; <5mm, tensile strengths ; 2.3∼3.0kg/mm², compressive strengths ; 5.3∼13.3kg/mm², flexural strengths ; 4.4 ∼5.4kg/mm².

[References]

Pyzik Aleksander J, Aksay Ilhan A, J. Am. Ceram. Soc., 72, 775 (1989)
Blakely KA, Gaffney MF, Shaffer PTB, Trans. Am. Nucl. Soc., 34, 199 (1980)
Rack HJ, Dupree SA, Smugeresky JF, SAND78-2317 (1979)
Taniuchi H, Iida T, Matsuda F, Nagahama H, IAEA-SM-286/135 123 (1987)
Japan Kokai Tokkyo Koho, JP 80119099 (1980)
Iida T, Taniuchi H, Fujisawa K, RAMTRANS, 2, 79 (1991)
Maeda M, Nagaoka T, Fujitani K, Sakaida T, JP 86173198 A2 (1986)
Wilski H, Radiat. Phys. Chem., 29, 1 (1987)
Morita Y, Hagiwara M, Kasai N, J. Appl. Polym. Sci., 27, 3569 (1982)
Japan Kokai Tokkyo Koho, JP 82147095 A2 (1982)
Ferrigno TH, "Handbook of Fillers and Reinforcements for Plastics," ed. H.S. Katz and J.V. Milewski, 11, Van Nostrand Reinhold Company, New York (1978)
Technical Bulletin, Bisco Products, Inc. (1986)
Boonstra RH, GA-A19897 (1990)
Do JB, KAERI-NEMAC/RR-120/94 (1994)
"Packaging and Transportation of Radioactive Materials," Code of Federal Regulations, Title 10, Part 71 (1983)

[Referenced By]

[1] Pyzik Aleksander J, Aksay Ilhan A, J. Am. Ceram. Soc., 72, 775 (1989)

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

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

[4] Taniuchi H, Iida T, Matsuda F, Nagahama H, IAEA-SM-286/135 123 (1987)

[5] Japan Kokai Tokkyo Koho, JP 80119099 (1980)

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

[7] Maeda M, Nagaoka T, Fujitani K, Sakaida T, JP 86173198 A2 (1986)

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

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

[10] Japan Kokai Tokkyo Koho, JP 82147095 A2 (1982)

[11] Ferrigno TH, "Handbook of Fillers and Reinforcements for Plastics," ed. H.S. Katz and J.V. Milewski, 11, Van Nostrand Reinhold Company, New York (1978)

[12] Technical Bulletin, Bisco Products, Inc. (1986)

[13] Boonstra RH, GA-A19897 (1990)

[14] Do JB, KAERI-NEMAC/RR-120/94 (1994)

[15] "Packaging and Transportation of Radioactive Materials," Code of Federal Regulations, Title 10, Part 71 (1983)