Nb가 첨가된 신형 지르코늄 피복관의 열적 크리프 거동

김준환; 방제건; 정용환; Jun Hwan Kim; Je Geon Bang; Yong Hwan Jeong

Korean Journal of Materials Research, Vol.14, No.7, 451-456, July, 2004

DOI10.3740/MRSK.2004.14.7.451 Export Citation

Nb가 첨가된 신형 지르코늄 피복관의 열적 크리프 거동

Thermal Creep Behavior of Advanced Zirconium Claddings Contained Niobium

김준환^†, 방제건, 정용환

한국원자력연구소 지르코늄 신합금 개발팀

Jun Hwan Kim^†, Je Geon Bang, and Yong Hwan Jeong

Zirconium Fuel Cladding Development Team, Korea Atomic Energy Research Institute, Daejon, 305-353, Korea

E-mail:

Thermal creep properties of the zirconium tube which was developed for high burnup application were evaluated. The creep test of cladding tubes after various final heat treatment was carried out by the internal pressurization method in the temperature range from 350 ? Cto400 ? C and from 100 to 150 MPa in the hoop stress. Creep tests were lasted up to 900days, which showed the steady-state secondary creep rate. The creep resistance of zirconium claddings was higher than that of Zircaloy-4. Factors that affect creep resistance, such as final annealing temperature, applied stress and alloying element were discussed. Tin as an alloying element was more effective than niobium due to solute hardening effect of tin. In case of advanced claddings, the optimization of final heat treatment temperature as well as alloying element causes a great influence on the improvement of creep resistance.

Keywords:Creep;Zirconium;Cladding;Niobium;Annealing

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Forgeron T, Brachet JC, Barcelo F, Castaing A, Hivroz J, Mardon JP, Bernaudat C, ASTM STP, 1354, 256 (2000)

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[1] Sabol GP, Kilp GR, Balfour MG, Roberts E, ASTM STP, 1023, 227 (1989)

[2] Mardon JP, Charquet D, Senevat J, ASTM STP, 1354, 505 (2000)

[3] Knorr DB, Notis MR, J. Nucl. Mater., 56, 18 (1975)

[4] Limback M, Andersson T, ASTM STP, 1295, 448 (1996)

[5] Frenkel JM, Weisz M, ASTM STP, 551, 140 (1974)

[6] Nam C, Choi BK, Jeong YH, Jung YH, Proc. the Korean Nuclear Society Fall Meeting (2002)

[7] Frankline DG, Lucas GE, Bement AL, ASTM STP, 815 (1983)

[8] Bernstein IM, Trans. Am. Inst. Met. and Pet. Eng., 239, 1518 (1967)

[9] Kim KM, Nam C, Lee MH, Jeong YH, Jung YH, Proc. the Korean Nuclear Society Fall Meeting (1999)

[10] Yoon YG, Jeong YH, Choi BK, J. Kor. Inst. Met. & Mater., 39, 8 (2001)

[11] Holmes JJ, J. Nucl. Mater., 13, 2 (1964)

[12] Ranaswami B, Craig GB, Trans. Am. Inst. of Met. and Pet. Eng., 239, 1226 (1967)

[13] Lee MH, Kim JH, Park SY, Bang JG, Choi BK, Jeong YH, Jung YH, Proc. of the Korean Nuclear Society Spring Meeting (2004)

[14] Nam C, Kim KH, Lee MH, Jeong YH, J. Kor. Nucl. Soc., 32, 372 (2000)

[15] Brenner R, Bechade JL, Castelnau O, Bacroix B, J. Nucl. Mater., 305, 175 (2002)

[16] McInteer WA, Baty DL, Stein KO, ASTM STP, 1023, 621 (1989)

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[19] Snowden KU, J. Nucl. Mater., 36, 347 (1970)

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