한국원자력학회:학술대회논문집 (Proceedings of the Korean Nuclear Society Conference)
- 한국원자력학회 1998년도 춘계학술발표회논문집(1)
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- Pages.79-86
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- 1998
A Nonlinear Analytic Function Expansion Nodal Method for Transient Calculations
- Joo, Han-Gyu (Korea Atomic Energy Research Institute) ;
- Park, Sang-Yoon (Korea Atomic Energy Research Institute) ;
- Cho, Byung-Oh (Korea Atomic Energy Research Institute) ;
- Zee, Sung-Quun (Korea Atomic Energy Research Institute)
- 발행 : 1998.05.01
초록
The nonlinear analytic function expansion nodal (AFEN) method is applied to the solution of the time-dependent neutron diffusion equation. Since the AFEN method requires both the particular solution and the homogeneous solution to the transient fixed source problem, the derivation solution method is focused on finding the particular solution efficiently. To avoid complicated particular solutions, the source distribution is approximated by quadratic polynomials and the transient source is constructed such that the error due to the quadratic approximation is minimized. In addition, this paper presents a new two-node solution scheme that is derived by imposing the constraint of current continuity at the interface corner points. The method is verified through a series of applications to the NEACRP PWR rod ejection benchmark problem.
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