Ignition of flammable hydrogen/air mixtures by high mass mechanical impact of Magnox contaminated surfaces

Journal article


Averill, A., Ingram, J., Holborn, P., Battersby, P. and Benson, C. (2020). Ignition of flammable hydrogen/air mixtures by high mass mechanical impact of Magnox contaminated surfaces. International Journal of Hydrogen Energy. 45 (4), pp. 3372-3380.
AuthorsAverill, A., Ingram, J., Holborn, P., Battersby, P. and Benson, C.
Abstract

Magnox and its corrosion products are a major constituent of some legacy nuclear waste storage silos which generate hydrogen. An experimental study investigates the likelihood of ignition of hydrogen/air when large mass projectiles impact rusty surfaces with Magnox contamination. Ignition is observed with 50kg projectiles impacting a 45º Magnox-smeared rusty anvil plate with KE as low as 40J. Theoretical calculations relating to the angled impacts reveal that they involve substantial tangential energy losses associated with frictional heating of the impact surfaces. It is shown that these energy losses are particularly dependent on the shape of the projectile since projectile geometry determines the radius of gyration and the relationship of centre of gravity to the impact point. In conclusion, the projectile shape is likely to be of greater importance than the mass (i.e. for a given impact energy) because of its direct bearing on the magnitude of the tangential energy loss.

Year2020
JournalInternational Journal of Hydrogen Energy
Journal citation45 (4), pp. 3372-3380
PublisherElsevier
ISSN0360-3199
Digital Object Identifier (DOI)doi:10.1016/j.ijhydene.2019.11.148
Publication dates
Online20 Dec 2019
Print24 Jan 2020
Publication process dates
Accepted19 Nov 2019
Deposited11 Dec 2019
Accepted author manuscript
License
CC BY-NC-ND 4.0
File Access Level
Open
Permalink -

https://openresearch.lsbu.ac.uk/item/88qq9

Accepted author manuscript

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