평형농도 개념과 고화체 내부 및 주변매질에서의 확산을 고려한 침출식과 모델 검증

김창락; 조찬희; 최희주; 이명찬; 김진웅

HWAHAK KONGHAK, Vol.33, No.2, 139-146, April, 1995

Export Citation

평형농도 개념과 고화체 내부 및 주변매질에서의 확산을 고려한 침출식과 모델 검증

Leach Rate Expression Based on Equilibrium Concept and Realistic Boundary Conditions and Model Validation

김창락, 조찬희, 최희주, 이명찬, 김진웅

초록

시멘트 고화체 내 확산과 흡착평형을 고려하고 고화체 표면에서 농도와 질량플럭스의 연속성을 경계조건으로 사용한 침출율 예측모델을 개발하였다. 또한 확산에 의하지 않은 고화체 표면의 제반상태에 영향을 받은 핵종유출 부분을 초기 유실누적분율로 정의하여 반영하였다. 침출모델의 검증을 위하여 담수, 해수, 토양 등의 다양한 침출환경에서 수행된 침출실험결과와 비교하였다. 본 침출모델은 다양한 침출실험결과를 설명하는데 유용하게 사용될 수 있으리라고 판단된다.

A model equation for nuclide leaching from cementitious waste form is formulated based on diffusion, sorption equilibrium, and the continuity boundary conditions of concentration and flux on the waste form surface. Nuclide release unrelated to diffusive transport mechanism is reflected in the model as a wash-off fraction which depends on the surface conditions of the waste form. This leaching model is validated by comparison with the results of leaching experiments in various environments including land water, sea water and soils. It is expected that this leaching model will be used satisfactorily in analyzing various leaching experimental results.

[References]

American Nuclear Society: ANSI/ANS 16.1 (1986)
Kim CL, Choi KS, Cho CH, Kim J, HWAHAK KONGHAK, 28(4), 458 (1990)
Nestor CW, ORNL/CSD/TM-84 (1980)
Miyamoto K, Takeda T, Muraoka S, Wadachi Y, Maeda S, J. Nucl. Sci. Technol., 30(7), 680 (1993)
Sullivan TM, Suen CJ, NUREG/CR-5387 (1989)
Kim CL, Cho CH, Choi KS, Kim J, J. Korean Nucl. Soc., 22(4), 315 (1990)
Kim CL, Hwnag Y, Cho CH, Lee MC, Proc. of the Int. Con. on Nucl. Waste Management and Ev. Remediation, 1, 835 (1993)
Serne RJ, Lokken RO, Criscenti LJ, Waste Manage., 12(2-3), 271 (1992)
Arora H, Dayal R, NUREG/CR-4756 (1986)
Johnston HM, Wilmot DJ, Waste Manage., 12(2-3), 289 (1992)
AEA Technology, P-KAERI '94 Project Report (1994)

[1] American Nuclear Society: ANSI/ANS 16.1 (1986)

[2] Kim CL, Choi KS, Cho CH, Kim J, HWAHAK KONGHAK, 28(4), 458 (1990)

[3] Nestor CW, ORNL/CSD/TM-84 (1980)

[4] Miyamoto K, Takeda T, Muraoka S, Wadachi Y, Maeda S, J. Nucl. Sci. Technol., 30(7), 680 (1993)

[5] Sullivan TM, Suen CJ, NUREG/CR-5387 (1989)

[6] Kim CL, Cho CH, Choi KS, Kim J, J. Korean Nucl. Soc., 22(4), 315 (1990)

[7] Kim CL, Hwnag Y, Cho CH, Lee MC, Proc. of the Int. Con. on Nucl. Waste Management and Ev. Remediation, 1, 835 (1993)

[8] Serne RJ, Lokken RO, Criscenti LJ, Waste Manage., 12(2-3), 271 (1992)

[9] Arora H, Dayal R, NUREG/CR-4756 (1986)

[10] Johnston HM, Wilmot DJ, Waste Manage., 12(2-3), 289 (1992)

[11] AEA Technology, P-KAERI '94 Project Report (1994)