Inner-side coatings have been proposed as a complementary solution within the accident tolerant fuel (ATF) framework, to provide enhanced protection for nuclear cladding. Unlike external surface, degradation of irradiated internal cladding surface has not studied extensively. Fission fragments produced during fission is one key players in this degradation. This study aimed estimate minimum thic...

During in reactor operations, the slowing down of fission fragments generates most radiation damage uranium dioxide. Fission deposit their energy to both atomic and electronic subsystems through nuclear interactions. To study possible synergistic effects deposition on microstructure, UO2 thin foils have been irradiated with 0.39 MeV Xe and/or 6 Si ions at 298 K using single or dual beam ion irr...

In this paper, we present a reduced-order modeling approach to study the Molten Salt Fast Reactor (MSFR). Our is nonintrusive and based on proper orthogonal decomposition method. We include adaptivity in selecting sampling points both time parameter space. Steady-state transient analysis were performed using developed models. steady-state analysis, capture effect of 30 model parameters spatial ...

Thermodynamic and electrochemical properties of actinides in molten fluoride salts are one the key data required for design safety assessment any salt reactor concept using liquid based fuel. In case Molten Salt Fast Reactor (MSFR), special attention has to be paid thorium fluoride, which is a direct fuel carrier constituent. This work presents experimental measurement ThF4 activity coefficient...

The Fukushima accident sequence The earthquake and the subsequent tsunami that devastated part of Northeast Japan on March 11th, 2011, led to a series of accidents in the Fukushima Daichi nuclear plant, constructed and operated by Tokyo Electric Power Company (TEPCO). Only three of the six units of the plant (all of them boiling water reactors, BWR) were operating at that time. The sequence of ...

The PUREX technology based on aqueous processes is currently the leading reprocessing technology in nuclear energy systems. It seems to be the most developed and established process for light water reactor fuel and the use of solid fuel. However, demand driven development of the nuclear system opens the way to liquid fuelled reactors, and disruptive technology development through the applicatio...

In Japan, R&D activities for partitioning and transmutation (P&T) have been promoted under the OMEGA programme for more than 15 years. These activities were reviewed by the Atomic Energy Commission in Japan in 2000. In accordance with the results of the review, three institutes, the Japan Atomic Energy Research Institute (JAERI), the Japan Nuclear Cycle Development Institute (JNC) and the Centr...

Building a new generation of fission reactors in the United States presents many technical and regulatory challenges. One important challenge is the need to share and present results from new high-fidelity, high-performance simulations in an easily usable way. Since modern multiscale, multi-physics simulations can generate petabytes of data, they will require the development of new techniques a...

According to the Korean long-term plan for nuclear technology development, KAERI is conducting a R&D project on the partitioning and transmutation (P&T) of long-lived radionuclides. The study for the partitioning is focused on the development of pyroprocessing based on an electrorefining of actinides because it is a kind of proliferation-resistive technology, where all the transuranic metals ar...