Programme

P.69 -- Poster, NCTP-43

Date: Wednesday, 1 August 2018

Time: 08:30 - 10:00

Advanced design of VVER1000 fuel assembly with burnable absorber

Hoai-Nam Tran (a,*), Van-KhanhHoang (b)

(a) Institute of Research and Development, Duy Tan University; (b) Institute for Nuclear Science and Technology, VINATOM Email:tranhoainam4@dtu.edu.vn

In the traditional design of LWRs, a few percent of burnable absorber, e.g. Gd2O3, is mixed homogeneously in the fuel rods of several assemblies for controlling excess reactivity and flattening the power distribution. However, the content of burnable absorberwould lead to the decrease of the thermal conductivity of thefuel rod. To avoid the problem, an advanced design of the VVER-1000 fuel assembly has been investigated using micro-particles of burnable absorber.Numerical analysis has been conducted using the Monte Carlo neutron transport MVP code for optimizing the parameters of burnable absorber. It is found that by using the micro-particles of burnable absorber and distributing them more evenly, it is possible to decrease the power peaking factor by about 5%, while improving the thermal conductivity of the fuel rod. Keywords:VVER1000, fuel assembly, burnable absorber

Presenter: Tran Hoai Nam