VALIDASI PAKET PROGRAM DIFUSI 3 DIMENSI BATAN-3DIFF UNTUK ASPEK PERHITUNGAN FLUKS NEUTRON

ABSTRAK
Validasi Paket Program Difusi 3 Dimensi Batan-3DIFF untuk Aspck Perhitungan Fluks Neutron.
Telah dilakukan validasi program difusi Batan-3DIFF untuk aspek perlUtungan fluks neutron dengan hasil
eksperimen pengukur.m fluks neutron di teras 26 RSG-GAS. PerlUtungan difusi teras ke 26 RSG-GAS dengan
program Batan-3DIFF dilakukan dalarn 4 kelompok energi neutron untuk kondisi teras sesuai dengan kondisi
eksperimen pengukur.m fluks neutron. Kondisi eksperimen yang disimulasikan dengan perlUtungan adalah
kondisi teras dingin, bebas xenon dan san1ariunl,d aya 100 kW dan posisi batcmgk endalibank 271 rnm serta
posisi regztlating rod 280 nUll Data tarnpcmgli nL'lng sel dihitung dengcmp rogram perlUtungcms el \VIMS Df4.
Selcmjutnya, distribusi faktor puncak daya (pPF) radial maupun aksial basil perllitungan dIoandingkan dengan
PPF yang diperoleh rum eksperimen. Hasil pengukuran d,m perhitungan PPF radial menunjukkan
penyimpangan minimal 0,8 % di grid H-7 daD rnaksimal 18,4 % di grid C-IO, sedangkan PPF aksial
menunjukkan penyimpangan nlinimal 0,49 digrid F- 7 pada ketinggian 462,5 mm dcm rnaksimal 88,02%
di grid E-3 padaketinggian 537,5 rnm.
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ABSTRACT
Validation of 3 Dimension Diffusion Code Batan-3DIFF for Neutron Calculation Aspect Validation
of diffusion code Batan-3DIFF for neutron allculation aspecthas been conducted by comparing the calculation
result ,vith neutron filL'\( measurement data on 2d' core of RSG-GAS. Batan-3DIFF allculation of 2d' core was
canied out in 4 neutron energy groups. The simulated e:\l>mment oondition was cold oore, xenon and samarium
free, 100 kW power leveL oontrol rod bank 271 mm and regulating rod 280 mm. Cross section data of the core
had been oomputed with cell allculation oodeW I1\.1SD /4. The allculated radial and axial power peaking factors
(pPF) were then oompared to the experiment data. For radial PPF, the deviation of allculation result from
e:\l>eriment data are 0.8 % on grid H-7 minimally and 18.4 % on grid F-7 maximally. For axial PPF, the
deviation of calculation result from e."\]Jerirnendta taa re 0.49 % on grid F- 7 at 462.5 mm height, minimally and
88.02 % on grid E-3 at 537.5 nun height, maxima1l~