A THEORETICAL AND EXPERIMENTAL-STUDY ON THE HYDROGEN VENTED DEFLAGRATION

CARCASSI MN FINESCHI F

Mn. Carcassi et F. Fineschi, A THEORETICAL AND EXPERIMENTAL-STUDY ON THE HYDROGEN VENTED DEFLAGRATION, Nuclear Engineering and Design, 145(3), 1993, pp. 355-364

14

INGLESE

Article

Nuclear Sciences & Tecnology

Nuclear Engineering and Design → ACNP

0029-5493

145

3

1993

355 - 364

ISI

0029-5493(1993)145:3<355:ATAEOT>2.0.ZU;2-4

During a severe accident at a nuclear power plant, there is the potent ial for the generation, accumulation and combustion of hydrogen. Vario us models and computer codes have been developed to predict the contai nment loading that may result from the combustion of hydrogen during a severe accident. A realistic evaluation of the maximum deflagration o ver pressure reached in the containment compartments can only be carri ed out if the burning rate is known. Since burning rate is not directl y measurable in tests, we are carrying out experiments of vented defla gration and making a code to obtain burning rate from the measured pre ssure transient and the observed flame propagation. In the first phase of the research, the DEVENT code was developed, as an analytical tool to simulate deflagration in a compartment with venting towards a cons tant pressure environment, and deflagration tests were carried out in the partially contained volumes of the HYDRO and VIEW apparatus. The p reliminary data gave interesting information on the optimum collocatio n of igniters and venting openings between compartments to mitigate th e hydrogen deflagration over pressures.