Machinery Space Fire Fighting – Modern Alternatives
Description
Machinery spaces in the majority of Royal Navy (RN) vessels use carbon dioxide (CO2) as the primary fire suppressant. While CO2 is very effective for firefighting, particularly in machinery space application, it is harmful to life in the concentrations required for effective fire suppression; exposure to concentrations greater than 15% can cause death within sixty seconds.
The use of CO2 and similar fire suppressant systems in machinery spaces presents a risk due to the potential exposure of personnel. This may occur in a fire scenario where personnel are unable to escape the affected compartment, if there is a leak in the system, or due to accidental discharge. These risks are typically mitigated through physical means and procedural controls. However, in the hierarchy of safety controls the primary means should always be the elimination of the hazard.
Babcock Energy & Marine undertook a study for the United Kingdom Ministry of Defence (MoD) into alternative methods of firefighting on Royal Navy minor warship machinery spaces with the safety of personnel considered a key requirement. The study identified five alternatives to CO2 available on the market. One particular aerosol fire suppression system was found to be superior to the others for application in small craft. This system is not toxic, non-ozone depleting and leaves almost no residue after application to the affected space, enabling re-entry (provided that the space has been ventilated to remove the products of combustion). The study concluded that traditional methods of fire suppression should be reconsidered across all small craft due to the health and safety issues associated with CO2 and the availability of improved alternatives.
This paper considers the use of traditional firefighting systems on naval vessels in light of 21st century health and safety regulations. An assessment of current fire extinguishing agents is presented followed by a case study to determine the most appropriate solution for a minor warship concept with a particular aerosol system being justified as the preferred option. The paper also considers if the same conclusions would be reached for major warships or if the difference in scale results in an alternative solution.
Files
INEC 2018 Paper 037 Goode SDG FINAL.pdf
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(2.9 MB)
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Additional details
References
- Harper P., 2011. Health and Safety Executive (HSE) Advisers: Wilday J., Bilio M., HSE Document : Assessment of the major hazard potential of carbon dioxide, June 2011.
- IMO, 2000. Adoption of the International Code for Fire Safety Systems (FSS Code) IMO Resolution MSC.98(73).
- IMO 2008. MSC.1/Circ.1270/Corr.1, Revised guidelines for the approval of fixed aerosol fire-extinguishing systems equivalent to fixed gas fire-extinguishing systems, as referred to in SOLAS 74, for machinery spaces, 29 August 2008.
- ISO 3941, 2007. Classification of Fires. September 2007.
- NFPA 2001, 2018. Standard on Clean Agent Fire Extinguishing Systems.
- R Hinge, 2014. Landing craft fire suppressant gas replacement study and cost benefit analysis, prepared by Design management Services on behalf of DES Ships. Issue 01, October 2014.
- Stat-X, 2017. First Responder Part No. 19052 05/17 datasheet. Accessed May 2017.
- UL 2018. Underwriters Laboratories Reference: 20180301-E495772 for Class I, Division 2: UL Online Certifications Directory, accessed May 2018.