ANALISIS PENGARUH IRADIASI FLUENS NEUTRON CEPAT TERHADAP BERILIUM REFLEKTOR REAKTOR RSG-GAS
Keywords:
flux, fluence, beryllium element, beryllium blockAbstract
Analysis of influence fast neutron fluence irradiated to the RSG-GAS beryllium reflector have been done. Methods of analysis was carried out by measuring fluxs neutron in beryllium element and block positio that function as reflector. The calculation done for determination it is there any influence of neutron as long as beryllium in the core. Bisede that, visualization done to make sure it there is any deformation at beryllium as efect of irradiation. Fluxs and fluences of beryllium element measurement result in 200 kW reactor power are 2.30E+07 n/cm2.sec and 4.19E+17 n/cm2 in position E-2, 3.70E+07 n/cm2s and 6.74E+17 n/cm2 in position J-8, 2.19E+12 n/cm2s and 3.99E+22 n/cm2 in position B-3. Measurement results in the position G-10 are 2.12E+12 n/cm2s and 3.86E+22 n/cm2. Other result are fluxs and fluence in beryllium block, those are 5,02E+07 n/cm2s and 9,15E+17 n/cm2 in position (5-6), and 2,32E+07 n/cm2s and 4,23E+17 n/cm2 in position (C-D). Deformation (∆L/L) results for beryllium element are 1,12E-08 in position E-2, 1,84E-08 in position J-8, 1,60E-03 in position B-3, and 1,55E-03 in position G-10. In beryllium block deformation results are 2,52E-08 in position (5-6) and 1,13E-08 in position (C-D). Those results are shown unseen deformation in beryllium element and beryllium block and demonstrably by visual observation in reactor hot cell.
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