Thermal-Hydraulic Safety Analysis for ANGRA1 Nuclear Power Plant After Replacement Steam Generator, Insertion of High Performance Fuel Assembly and Power Uprate
After Replacement of the Steam Generator (RSG) in ANGRA1 Nuclear Power Plant (NPP), it is planned to increase the plant power and to insert a High Performance Fuel Assembly (HPFA) in the subsequent cycles. ANGRA1 is a Pressurized Water Reactor (PWR) located in Rio de Janeiro state in Brazil. This fact required that the whole safety analysis to be re-done for ANGRA1 NPP for this purpose. In the Thermal-hydraulics (TH) area, the analyses have been done for several postulated accidents starting from the following assumptions: ·New operational parameters according to plant reevaluation;· HPFA features were considered in the analyses (geometries, components); ·Revised Thermal Design Procedure (RTDP) has been considered for the Departure from Nuclear Boiling Ratio (DNBR) calculations (statistical convolution of the uncertainties) and; ·WRB-2 correlation (Ref. /8/) has been used for HPFA, after the applicability has been proved in the Critical Heat Flux (CHF) tests performed at the Columbia University in 2003. The performed analyses have demonstrated full TH compatibility of the HPFA working at the considered conditions. Following results arose from the analyses:· The minimum DNBR criteria have not been violated for any one of the postulated Condition II accidents; ·Sufficient DNBR margin has been preserved to account for possible penalties for transition core and rod bow.
Thermal-Hydraulics safety-analysis high-performance fuel assembly power uprate steam generator
Sydney da Silva Gomes Franklin Palheiros
Indústrias Nucleares do Brasil S.A.Rodovia Presidente Dutra km 330 Resende RJ Brazil 27550-000
国际会议
上海
英文
2469-2478
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）