Title :
The Best-Estimate Plus Uncertainty (BEPU) challenge in the licensing of current generation of reactors
Author :
Petruzzi, Alessandro ; Cherubini, Marco ; Lanfredini, Marco ; De Luca, Domenico
Author_Institution :
NINE Nucl. & Ind. Eng. S.R.L., Pisa, Italy
Abstract :
Within the licensing process of the Atucha II PHWR (Pressurized Heavy Water Reactor) the BEPU (Best Estimate Plus Uncertainty) approach has been selected for issuing of the Chapter 15 on FSAR (Final Safety Analysis Report). The key steps of the entire process are basically two: a) the selection of PIE (Postulated Initiating Events) and, b) the analysis by best estimate models supported by uncertainty evaluation. Otherwise, key elements of the approach are: 1) availability of qualified computational tools including suitable uncertainty method; 2) demonstration of quality; 3) acceptability and endorsement by the licensing authority. The effort of issuing Chapter 15 is terminated at the time of issuing of the present paper and the safety margins available for the operation of the concerned NPP (Nuclear Power Plant) have been quantified.NPP
Keywords :
fission reactor safety; heavy water reactors; nuclear power stations; Atucha II PHWR; BEPU; FSAR; PIE; best-estimate plus uncertainty; final safety analysis report; nuclear power plant; postulated initiating events; pressurized heavy water reactor; reactor licensing; uncertainty evaluation; Extrapolation; Probabilistic logic; Qualifications; Safety; Three-dimensional displays; Uncertainty; Atucha-2; BEPU; Licensing; SAR;
Conference_Titel :
Energy (IYCE), 2015 5th International Youth Conference on
Conference_Location :
Pisa
Print_ISBN :
978-1-4673-7171-1
DOI :
10.1109/IYCE.2015.7180809
