WPRS Expert Group on Uncertainty Analysis in Modelling (EGUAM)
The Expert Group provides advice to the WPRS and the nuclear community on the scientific development
needs (data and methods, validation experiments, scenario studies) of sensitivity and uncertainty methodology
for modelling of different reactor systems and scenarios.
The main activity will be focused on uncertainties in modelling LWR transients. In this context the objectives
To determine modelling uncertainties for reactor systems under steady-state and transient conditions,
quantifying the impact of uncertainties for each type of calculation in the multi-physics analysis, i.e.:
Thermal hydraulics modelling;
For each of these types of calculation the major sources of uncertainty will be determined, arising from:
Data (e.g. nuclear data, geometry, materials).
To develop and test methods for combining the above sources of uncertainty for each type of calculation
so as to yield uncertainty assessment for the coupled multi-physics analyses. Also, to develop
a benchmark framework which combines information from available integral facility and
NPP experimental data with analytical and numerical benchmarking:
where available, experimental data will be used to test the individual types of calculation as well
coupled multi-physics simulations.
Cold water injection and core pressurisation (BWR)
Turbine Trips (BWR) benchmark
Critical Issues in Nuclear Reactor Technology (CRISSUE-S)
Uncertainty Analysis in Modelling:
Volume I: Neutronics Phase Specification
Volume II: Neutronics Phase Results
UAM-13, Thirteenth Workshop,13th-17th May 2019, hosted by ANL/ORNL, @ORNL, USA, Tentative schedule below, registration details available shortly.
UAM-12, Twelfth Workshop, 13-18 May 2018, hosted by N.IN.E, Lucca, Italy
When registering only for the WPRS meetings, at the initial sign-up page, in the field 'WPRS code' please enter "wprs2018lucca"
Meetings, workshops and conferences
WPRS and associated Expert Group meetings are held approximately every twelve months. The 16th meeting of the WPRS (WPRS-16) and associated Expert Group meetings will take place during the week of February 18th 2019 at the OECD Headquarters, Boulogne-Billancourt, France. More about WPRS meetings.