tailieunhanh - Evaluation of corrosion on the fuel performance of stainless steel cladding

This paper addresses the SS corrosion behavior in a modified fuel performance code in order to evaluate its effect on the global fuel performance. Then, data from the literature concerning to SS corrosion are implemented in the specific code subroutines, and the results obtained are compared to those for Zircaloy-4 (Zy-4) under the same power history. | Evaluation of corrosion on the fuel performance of stainless steel cladding EPJ Nuclear Sci. Technol. 2 40 2016 Nuclear Sciences D. de Souza Gomes et al. published by EDP Sciences 2016 amp Technologies DOI epjn 2016033 Available online at http REGULAR ARTICLE Evaluation of corrosion on the fuel performance of stainless steel cladding Daniel de Souza Gomes1 Alfredo Abe1 Antonio Teixeira e Silva1 Claudia Giovedi2 and Marcelo Ramos Martins2 1 Nuclear and Energy Research Institute IPEN CNEN Nuclear Engineering Center CEN Av. Prof. Lineu Prestes 2242 São Paulo SP Brazil 2 LabRisco University of São Paulo Av. Prof. Mello Moraes 2231 São Paulo SP Brazil Received 13 October 2015 Received in final form 18 February 2016 Accepted 7 September 2016 Abstract. In nuclear reactors the use of stainless steel SS as the cladding material offers some advantages such as good mechanical and corrosion resistance. However its main advantage is the reduction in the amount of the hydrogen released during loss-of-coolant accident as observed in the Fukushima Daiichi accident. Hence research aimed at developing accident tolerant fuels should consider SS as an important alternative to existing materials. However the available computational tools used to analyze fuel rod performance under irradiation are not capable of assessing the effectiveness of SS as the cladding material. This paper addresses the SS corrosion behavior in a modified fuel performance code in order to evaluate its effect on the global fuel performance. Then data from the literature concerning to SS corrosion are implemented in the specific code subroutines and the results obtained are compared to those for Zircaloy-4 Zy-4 under the same power history. The results show that the effects of corrosion on SS are considerably different from those on Zy-4. The thickness of the oxide layer formed on the SS surface is considerably lower than that formed on Zy-4. As a consequence of this the global fuel .