Conveners
2: Experimental Testing of ATF Materials and Validation Database
- Robert Hansen (Co- Chairs)
- Martin Sevecek (co-chairs)
2
- Robert Hansen
- Martin Sevecek (co-chairs)
Description
โข Verification, Validation, and Uncertainty Quantification of fuel performance codes
โข Multi-physics and Multi-scale Modelling
โข Benchmarking of fuel performance codes for ATF materials in operational and accident conditions.
โข Data-driven and artificial intelligence (AI) applications
SEPARATE EFFECT TESTS WITH ATF CLADDING MATERIALS WITHIN IAEA ATF-TS CRP
M. ล EVEฤEK1
1Czech Technical University in Prague, Prague, Czech Republic
Corresponding author: M. ล EVEฤEK, martin.sevecek@fjfi.cvut.cz
INTRODUCTION
This paper describes the separate effect tests performed on ATF cladding materials within the ATF-TS coordinated research project (CRP) [1]. Work Task 1 (WT1) of...
INTRODUCTION: The main objective of accident-tolerant fuel (ATF) development is to withstand high-temperature accident conditions in nuclear reactors. An important part of ATF fuel qualification involves experimental testing of fuel components in both in-pile and out-of-pile test facilities. The CODEX experimental program included two tests with ATF fuel materials: the CODEX-ATF test,...
In order to obtain the first-hand information and valuable in-pile experience with evolutionary accident tolerant fuel (ATF) products, ELECTRABEL (ENGIE) and European Fuel Group (EFG) has reached an agreement in 2019 to load 4 RFA-2 OPT XLR fuel assemblies with EnCoreยฎ Cr-coated cladding lead test rods (LTRs) at Doel Nuclear Power Plant Unit 4 (Doel-4). Under this agreement, ENUSA and...
Integral tests with bundles of Zircaloyโ4 fuel cladding coated with 10 ฮผm Cr, 20 ฮผm Cr, and 26 ฮผm Cr/CrN were carried out under simulating design extension conditions (DEC) using an induction heating furnace at the CRIEPI's DEGREE facility. The bundles were heated to 1350 ยฐC or 1500 ยฐC in a steam-Ar mixed gas atmosphere and then quenched in Ar gas. In addition to on-line measurements of...
Zirconium alloys have long served as fuel cladding in light water reactors due to their excellent mechanical properties and low neutron absorption cross-section. However, during loss-of-coolant accidents (LOCAs), they react violently with high-temperature steam. Chromium-coated zirconium alloys are a leading candidate for accident-tolerant fuels (ATFs), yet their protective capability fails...
Zirconium alloys (Zircaloys) are widely used as fuel cladding in LWRs but suffer rapid oxidation in high-temperature steam, compromising structural integrity. Cr coatings, especially those applied via physical vapour deposition (PVD) method, offer improved oxidation resistance and mechanical stability. According to open literature, the 3D real-time failure process of such material under...
Abstract: The Cr-coated cladding has excellent corrosion resistance and good bonding performance with zirconium alloy matrix, and has become the most promising material selection for ATF cladding in engineering applications. Due to the fact that the Cr-coated cladding is obtained by preparing a layer of Cr coating on the outer surface of the traditional zirconium alloy cladding, the...
INTRODUCTION: In recent years, Idaho National Laboratory (INL) has performed both irradiation and post-irradiation examination (PIE) tests to support development and deployment of advanced technology fuel (ATF) concepts. The paper overviews test irradiations under pressurized water reactor (PWR) conditions at both commercial and test reactors. PIE was performed on rodlets fabricated by...
In the context of accident tolerant fuel (ATF) development, long-term corrosion tests were conducted on a niobium-stabilized austenitic stainless steel (Nb-ASS) to assess its oxidation resistance under normal water operation conditions in a pressurized water reactor (PWR) environment. Due to the limited availability of corrosion data for this alloy in such conditions, two independent...
This presentation will focus on the behaviour of Cr-coated zirconium alloy claddings under LOCA conditions. Among the various coating concepts investigated by CEA over the past 15 years, particular attention has been paid to chromium coatings deposited via Physical Vapour Deposition โ High Power Impulse Magnetron Sputtering (PVD-HiPIMS), identified early on as a promising candidate for...
INTRODUCTION: Chromium-based coated Accident Tolerant Fuel (ATF) cladding, currently the only feasible surface treatment for pressurized water reactors, mitigates the limitations of conventional Zirconium (Zr) claddings by enhancing performance, enabling higher burnup, and reducing exothermic metal-water reactions and cladding embrittlement from condition I to Beyond Design Basis Condition...
After Fukushima Daiichi nuclear accident, ATFs (Accident Tolerent Fuels) are being developed to prevent severve accident or to delay the progression of accidents in nuclear power plants. Some of the new designs are focoused on conventional Zr cladding coated with materials that improve cladding behaviour in high-temperature enviroments. This paper presents high-temperature experiments carried...
INTRODUCTION: In the framework of the IAEA Coordinated Research Project Testing and Simulation for Advanced Technology and Accident Tolerant Fuels (ATF-TS), a comprehensive experimental program was conducted to investigate the performance of advanced cladding materials. The goal was to characterize their behaviour under various conditions and to compare the newly obtained data with that of...
The Korea Atomic Energy Research Institute is developing micro-cell UOโ pellets as a sintering material for accident-resistant nuclear fuel. Micro-cell sintered materials are composed of cell wall material formed by creating multiple membranes within the UOโ. The metal microcell sintered body improves the thermal conductivity of the UOโ sintered body by connecting materials with high thermal...
This study establishes a Zr-Cr diffusion mechanism model to quantitatively reveal Cr concentration profiles, ZrCr2 layer growth kinetics, and defect formation mechanisms based on an experimental investigation, providing theoretical support for failure prediction and emergency strategies in extreme conditions.
