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Underwater acoustic characterisation of unexploded ordnance disposal using deflagration

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journal contribution
posted on 16.12.2020, 14:00 by Stephen Robinson, Lian Wang, Sei-Him Cheong, Paul LepperPaul Lepper, Francesca Marubini, John Hartley
The seabed off North West Europe contains much unexploded ordnance (UXO), posing a hazard to offshore developments such as windfarms. The typical removal method is through high-order detonation of a donor charge placed adjacent to the UXO. This method poses a risk of injury or death to marine mammals and other fauna from the high sound levels produced. This paper describes a controlled field experiment to compare the sound produced by high-order detonations with a low-order disposal method called deflagration, which uses a shaped charge of modest size, is less energetic, and offers reduced environmental impact from lower acoustic output. The results demonstrate a substantial reduction over high order detonation, with the peak sound pressure level and sound exposure level being more than 20 dB lower for the deflagration, and with the acoustic output depending only on the size of the shaped charge (rather than the size of the UXO).

Funding

UK's Department for Business, Energy and Industrial Strategy, UK Government's Offshore Strategic Environmental Assessment programme (contract OESEA-19-107)

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Marine Pollution Bulletin

Volume

160

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Marine Pollution Bulletin and the definitive published version is available at https://doi.org/10.1016/j.marpolbul.2020.111646.

Acceptance date

04/09/2020

Publication date

2020-09-22

Copyright date

2020

ISSN

0025-326X

eISSN

1879-3363

Language

en

Depositor

Dr Paul Lepper. Deposit date: 15 December 2020

Article number

111646

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