OECD Papers

OECD Papers provides access to a collection of substantive papers not published as books or articles in other OECD series or journals. All subjects are covered, from the latest OECD research on macroeconomics and economic policies, to work in areas as varied as employment, education, environment, trade, science and technology, development and taxation. OECD Papers are available on a subscription basis. Now a part of the OECD Journal

English French

VVER-1000 Coolant Transient Benchmark

Phase 1 (V1000CT-1) Vol. 2. Summary Results of Exercise 1: Point Kinetics Plant Simulation

In the recent past, the analysis of plant transients and the analysis of reactor core behaviour were performed separately. Usually, the core was represented by a point kinetics model to analyse plant transients and, for the core physics calculations, boundary conditions were imposed at the inlet and the outlet of the core. In reality, these boundary conditions depend on the power generation in the core. To ensure a realistic description of the physical phenomena in an accident analysis, the application of coupled codes is required. In recent years code developers began coupling three-dimensional (3-D) neutron kinetics codes with advanced thermal-hydraulics system codes. Such complex computer codes allow modelling of the entire reactor system, including a 3-D neutronics core. When reactivity initiated accidents with an asymmetric neutron flux distribution in the core are analysed, only such coupled codes are capable of estimating the real feedback effects. These codes can perform safety analyses in order to replace the conservative estimations with best-estimate calculations.


This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error