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Modelling the radiolysis of RSG-GAS primary cooling water

Sofia Butarbutar,, SLB and Rahayu Kusumastuti, RK and M. Subekti, MS and Geni Rina Sunaryo, GRS (2017) Modelling the radiolysis of RSG-GAS primary cooling water. In: International Conference on Nuclear Technologies and Sciences (ICoNETS 2017), 12 Oktober 2017, Makasar - Sulawesi Selatan - Indonesia.

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Abstract Water chemistry control for light water coolant reactor required a reliable understanding of radiolysis effect in mitigating corrosion and degradation of reactor structure material. It is known that oxidator products can promote the corrosion, cracking and hydrogen pickup both in the core and in the associated piping components of the reactor. The objective of this work is to provide the radiolysis model of RSG GAS cooling water and further more to predict the oxidator concentration which can lead to corrosion of reactor material. Direct observations or measurements of the chemistry in and around the high-flux core region of a nuclear reactor are difficult due to the extreme conditions of high temperature, pressure, and mixed radiation fields. For this reason, chemical models and computer simulations of the radiolysis of water under these conditions are an important route of investigation. FACSIMILE were used to calculate the concentration of O2 formed at relatively long-time by the pure water γ and neutron irradiation (pH=7) at temperature between 25 and 50 °C. This simulation method is based on a complex chemical reaction kinetic. In this present work, 300 MeV-proton were used to mimic γ-rays radiolysis and 2 MeV fast neutrons. Concentration of O2 were calculated at 10−6 - 106 s time scale.

Item Type: Conference or Workshop Item (Paper)
Subjects: Keselamatan dan Keamanan Nuklir
Divisions: Pusat Teknologi dan Keselamatan Reaktor Nuklir
Depositing User: USER PTKRN BATAN
Date Deposited: 14 May 2018 02:13
Last Modified: 14 May 2018 02:13
URI: http://repo-nkm.batan.go.id/id/eprint/1391

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