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Concept selection of normally unmanned installations in the North Sea

Forss, Richard LU (2012) In LUTVDG/TVBB VBR920 20121
Division of Fire Safety Engineering
Division of Risk Management and Societal Safety
Abstract
Should a normally unmanned installation rely on helicopter shuttling to allow for the people working there to be accommodated at another platform during the resting periods with regards to the potential loss of life (PLL)? Would the risk the personnel are exposed to increase or decrease if the need for helicopter shuttling was eliminated due to a different design allowing for periodic manning of the installation?
The purpose of this study is to develop a coarse framework, a model, for risk-based concept selection of normally unmanned installations (NUI) in the North Sea by comparison of PLL. The results of the model will be used to indicate, with regards to PLL, whether a NUI should be designed to allow for periodical manning instead of... (More)
Should a normally unmanned installation rely on helicopter shuttling to allow for the people working there to be accommodated at another platform during the resting periods with regards to the potential loss of life (PLL)? Would the risk the personnel are exposed to increase or decrease if the need for helicopter shuttling was eliminated due to a different design allowing for periodic manning of the installation?
The purpose of this study is to develop a coarse framework, a model, for risk-based concept selection of normally unmanned installations (NUI) in the North Sea by comparison of PLL. The results of the model will be used to indicate, with regards to PLL, whether a NUI should be designed to allow for periodical manning instead of relying on helicopter shuttling to an accommodation platform during.
The model is constructed through the use of historical data. The risk contribution due to helicopter flights is estimated by failure data from offshore helicopter flights in the North Sea. The risk contribution due to the crew being present on the platform is estimated through data used in QRAs for various North Sea installations. The model is based on a generic area distribution where each area has a FAR value which in turn is based on representative area-FAR values for installations in the North Sea. To use the model, inputs such as manning distributions, flight times and required work load is required.The model can be used to qualitatively indicate which of the two alternatives will subject a generic crew to the lowest level of PLL. There needs to be an evaluation coupled with the results though, with regards to how the limitations of the model might have affected the results. There is room for improvements in the model, which if implemented could improve the reliability of the model and accuracy of its results. (Less)
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author
Forss, Richard LU
supervisor
organization
course
VBR920 20121
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Concept selection, normally unmanned offshore installations, North Sea, area-FAR, helicopter shuttle risk, risk-based model
publication/series
LUTVDG/TVBB
report number
5392
ISSN
1402-3504
language
English
id
3411315
date added to LUP
2013-02-26 07:51:51
date last changed
2014-03-10 10:40:44
@misc{3411315,
  abstract     = {Should a normally unmanned installation rely on helicopter shuttling to allow for the people working there to be accommodated at another platform during the resting periods with regards to the potential loss of life (PLL)? Would the risk the personnel are exposed to increase or decrease if the need for helicopter shuttling was eliminated due to a different design allowing for periodic manning of the installation?
The purpose of this study is to develop a coarse framework, a model, for risk-based concept selection of normally unmanned installations (NUI) in the North Sea by comparison of PLL. The results of the model will be used to indicate, with regards to PLL, whether a NUI should be designed to allow for periodical manning instead of relying on helicopter shuttling to an accommodation platform during.
The model is constructed through the use of historical data. The risk contribution due to helicopter flights is estimated by failure data from offshore helicopter flights in the North Sea. The risk contribution due to the crew being present on the platform is estimated through data used in QRAs for various North Sea installations. The model is based on a generic area distribution where each area has a FAR value which in turn is based on representative area-FAR values for installations in the North Sea. To use the model, inputs such as manning distributions, flight times and required work load is required.The model can be used to qualitatively indicate which of the two alternatives will subject a generic crew to the lowest level of PLL. There needs to be an evaluation coupled with the results though, with regards to how the limitations of the model might have affected the results. There is room for improvements in the model, which if implemented could improve the reliability of the model and accuracy of its results.},
  author       = {Forss, Richard},
  issn         = {1402-3504},
  keyword      = {Concept selection,normally unmanned offshore installations,North Sea,area-FAR,helicopter shuttle risk,risk-based model},
  language     = {eng},
  note         = {Student Paper},
  series       = {LUTVDG/TVBB},
  title        = {Concept selection of normally unmanned installations in the North Sea},
  year         = {2012},
}