NEA PRISME-2 Project

The acronym PRISME comes from the French phrase propagation d’un incendie pour des scénarios multi-locaux élémentaire, which in English can be translated as "fire propagation in elementary multi-room scenarios".

The PRISME 2 project is a follow-up of the PRISME project which provided valuable results to participants on room-to-room heat and smoke propagation, the effects of ventilation and the resulting thermal stresses to sensitive safety equipment in specific room configurations. The PRISME 2 project like the PRISME project consists of a series of fire and smoke propagation tests in a dedicated facility at the French Institut de radioprotection et de sûreté nucléaire (IRSN) centre at Cadarache.  It is once again planned to use data from the project to study among other areas, multi-room fires and for validating fire computer codes.

The PRISME 2 project results will address some of the outstanding safety issues particularly with respect to the appreciable uncertainties that currently exist in risk assessments for nuclear power plants due to gaps in knowledge and modelling capabilities on fire growth and propagation, on fire extinction phenomena, on the prediction of damage to equipment and on the treatment of plant and operator response to a fire event.  The PRISME 2 project will also provide valuable information on outstanding questions with respect to fire probabilistic safety assessments, in particular regarding how heat and smoke propagate from one room to another and the impact of smoke on safety critical systems.

The PRISME 2 technical program consists of the following test campaigns:

The results obtained will be used as a basis for qualifying fire codes (either simplified zone model codes or computerised fluid dynamics codes used in the fire safety analysis of nuclear installations). After qualification, these codes could be applied for simulating other fire propagation scenarios in various room configurations with a higher degree of confidence. The information will be useful for designers in order to select the best fire protection strategy.

Current project participants

Belgium, Canada, Finland, France, Germany, Japan, Spain, Sweden and the United Kingdom


EUR 7 million

Project period

July 2011 to June 2016

Related links

Last updated: 11 September 2015