Assessment of the Neutronic Characteristics of DCA Lattices


Article Preview

An investigation on the effect of the neutronic behavior on the lattice for a Deuterium Critical Assembly (DCA) in JNC (Japan Nuclear Cycle Development Institute) has been performed. The DCA, the heavy water moderated and light water cooled pressure-tube type research facility, was designed not only for the core physics research, but also for the development of the core-related technology for the Advanced Thermal Reactor (ATR). The core structure of the ATR is highly heterogeneous and it is separated from the heavy water moderator by a calandria tube. Therefore, the neutron behavior is quite complicated and sensitive to a change of the core structure. In this study, the assessment of the core physics characteristics such as the multiplication factor and the void coefficient for the DCA was conducted using the WIMS-D5 code and the results were compared with those of both the experimental data and WIMS-AECL.



Key Engineering Materials (Volumes 277-279)

Edited by:

Kwang Hwa Chung, Yong Hyeon Shin, Sue-Nie Park, Hyun Sook Cho, Soon-Ae Yoo, Byung Joo Min, Hyo-Suk Lim and Kyung Hwa Yoo




B.J. Min and W.Y. Kim, "Assessment of the Neutronic Characteristics of DCA Lattices", Key Engineering Materials, Vols. 277-279, pp. 747-752, 2005

Online since:

January 2005





[1] DONNELLY J.V., WIMS-CRNL: A User's Manual for the Chalk River Version of WIMS, AECL-8955, Atomic Energy of Canada Limited, (1986).

[2] KOWATA Y. and FUKUMURA N., Study on Coolant Void Reactivity of Pressure-Tube-Type Heavy Water Lattice by the Substitution Method, Nucl. Sci. Eng., 99, 299 (1988).


[3] AIHARA N. et al. Axial Dependence of Partial Void Reactivity in a Light Water Cooled, Heavy Water Moderated, Pressure Tube Type Reactor, Nucl. Sci. Eng., 109, 158 (1991).


[4] HACHIYA Y. et al., Lattice Parameter Measurements on Cluster-Type Fuel for Advanced Title of Publication (to be inserted by the publisher) Thermal Reactor, J. Nucl. Sci. & Tech. 13(11), 618 (1976).

[5] WAKABAYASHI T. and HACHIYA Y., Thermal Neutron Behavior in Cluster-Type Plutonium Fuel Lattices, Nucl. Sci. Eng. 63, 292 (1977).


[6] SHIBA K., Substitution Measurements on 28-Fuel-rod Critical Clusters in D2O and Their Analysis by the Second Order Perturbation Method, Nucl. Sci. Eng. 65, 492 (1978).


[7] MIN B.J., KIM S.Y., RYU S.J. and SUK H.C., Analysis of Experimental Data, Proceedings of the Korean Nuclear Society Spring Meeting, Korea, May (2000).

[8] M.J. Halsall and C.J. Tauman, WIMS-D: A Neutronics Code for Standard Lattice Physics Analysis, AEA Technology, (1986).