Enhancing Combustion Risk Management in Nuclear Power Plants

Nuclear Power Plant Illustration

In the event of a severe accident in a nuclear power plant, combustible gases can be released, leading to a potential explosion risk in the nuclear containment building. These gases, including Hydrogen (H2) and Carbon monoxide (CO) need to be managed to avoid threatening the containment integrity, which can result in the release of radioactive material into the environment.

The AMHYCO project improved experimental knowledge and simulation capabilities in an area that has not been explored sufficiently in previous EU and OECD projects: combustion risk management of hydrogen and carbon monoxide (H2/CO) mixtures in severe accidents in nuclear power plants.

PARTNERS

The AMHYCO consortium consists of 12 organisations from 6 European countries and one from Canada and is led by the Universidad Politécnica de Madrid (UPM).

ABOUT AMHYCO

Severe accidents in nuclear power plants are costly (IRSN "Institut de Radioprotection et de Sûreté Nucléaire" (now ASNR) estimated the total cost of a Fukushima-scale accident in France to reach nearly €188 billion) and are potentially dangerous to both humans and the environment.

To prevent and/or reduce the impact of these accidents, nuclear power plants must have adequate accident management measures in place.

During a severe accident, combustible gases can be released, leading to a potential explosion risk in the nuclear containment building. These gases - including hydrogen and carbon monoxide - need to be managed to avoid threatening the containment integrity, which can result in the release of radioactive material into the environment.

AMHYCO has three main project objectives:

  • To experimentally investigate phenomena that are difficult to predict theoretically: H2/CO combustion and PARs (Passive Autocatalytic Recombiners) behaviour under realistic accidental conditions, taking into account the presence of contaminants in the atmosphere.
  • To improve the predictability of analysis tools – Lumped Parameter (LP), 3D and CFD codes: through improved physical models for H2/CO combustion and hazard evaluation inside the reactor containment and providing support to Severe Accident Management Guidelines (SAMGs) design and development.
  • To improve the Severe Accident Management Guidelines for both in vessel and ex-vessel phases with respect to combustible gases risk management, using theoretical, simulation and experimental results.
Nuclear Power Plant
Project Impacts

PROJECT IMPACTS

The AMHYCO consortium consists of 12 organisations from 7 countries, 6 European and 1 Canadian, and is led by the Universidad Politécnica de Madrid (UPM).

1.

Improve the understanding of H2/CO combustion through a database of experiments

2.

Strenghten the quality of futur evaluation and design of combustion mitigation systems

3.

Enhance the combustion risk management in nuclear power plants

4.

Contribute to long term operation upgrades of GEN II and III reactors

PROJECT'S RESULTS

Read the results and reports produced by our experts during the project's implementation.