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Research Papers

A Functional Protection Method for Availability and Cost Risk Management of Complex Research Facilities

[+] Author and Article Information
R. Andersson

Protection Systems Group,
European Spallation Source ERIC,
Lund 22100, Sweden;
Department of Physics,
University of Oslo,
Oslo 0316, Norway
e-mail: riccard.andersson@esss.se

E. Bargalló, A. Nordt

Protection Systems Group,
European Spallation Source ERIC,
Lund 22100, Sweden

Manuscript received May 28, 2017; final manuscript received March 26, 2019; published online June 10, 2019. Assoc. Editor: James Lambert.

ASME J. Risk Uncertainty Part B 5(3), 031002 (Jun 10, 2019) (9 pages) Paper No: RISK-17-1067; doi: 10.1115/1.4043409 History: Received May 28, 2017; Revised March 26, 2019

While the area of functional safety for industry has evolved over the years by developing well-renowned standards and methods proven in use, such standards are not present in the field of equipment protection for complex research facilities. Research facilities in particular do typically not apply global, systematic approaches for functional equipment protection, but rather rely on system expert judgment for the individual systems, often leaving out the emergent properties of complex systems of systems. With the increasing demands on research facilities to be highly reliable and available, comparable to industrial facilities, a holistic and systematic method for equipment protection is, if not necessary, highly beneficial. This paper describes the development of a risk management method named functional protection, and benchmarks its lifecycle steps toward the IEC 61508 functional safety standard as well as the ISO 31000 risk management standard. The functional protection method is currently applied for the design and construction of the European Spallation Source in Lund, Sweden.

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References

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Figures

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Fig. 2

The three constituent teams involved in the functional protection lifecycle, where the color of the bubble matches the color of the column in Fig. 1

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Fig. 3

Development of PFs from abductive and inductive analyses

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Fig. 4

The functional protection abductive risk management process, starting at the system level and ending at the definition of PFs

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Fig. 1

The functional protection lifecycle

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Fig. 5

Example of the signal path for a PF, going from the sensors that detect the event, through the logic element, and finishing at the actuators that carry out the end behavior of the function

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