The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Tao, F. AU - Murphy, J.M. ED - Schaa, Volker RW ED - Costa, Isidre ED - Fernández, David ED - Matilla, Ãscar TI - Applying Layer of Protection Analysis (LOPA) to Accelerator Safety Systems Design J2 - Proc. of ICALEPCS2017, Barcelona, Spain, 8-13 October 2017 C1 - Barcelona, Spain T2 - International Conference on Accelerator and Large Experimental Control Systems T3 - 16 LA - english AB - Large accelerator safety system design is complex and challenging. The complexity comes from the wide geographical distribution and the entangled control/protection functions that are shared across multiple control systems. To ensure safety performance and avoid unnecessary overdesign, a systematic approach should be followed when setting the functional requirements and the associated safety integrity. Layer of Protection Analysis (LOPA) is a method in IEC61511 for assigning the SIL to a safety function. This method is well suited for complex applications and is widely adopted in the process industry. The outputs of the LOPA study provide not only the basis for setting safety functions design objective, but also a reference document for managing system change and determining test scope. In this paper, SLAC credited safety systems are used to demonstrate the application of this semi-quantitative method. This example will illustrate how to accurately assess the hazardous event, analyze the independence of different protection layers, and determine the reliability of a particular protection function. PB - JACoW CP - Geneva, Switzerland SP - 1217 EP - 1220 KW - ion KW - controls KW - radiation KW - PLC KW - electron DA - 2018/01 PY - 2018 SN - 978-3-95450-193-9 DO - 10.18429/JACoW-ICALEPCS2017-THCPA03 UR - http://jacow.org/icalepcs2017/papers/thcpa03.pdf ER -