S

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System Test Pressure

Test pressure applied to the riser during system field pressure test of the C/WO riser system performed after installation and before start of operation. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards

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System, Intrinsically Safe

An assembly of interconnected intrinsically safe apparatus, associated apparatus, and interconnecting cables in which those parts of the system that may be used in hazardous (classified) locations are intrinsically safe circuits. An intrinsically safe system may include more than one intrinsically safe circuit. Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards Source: API RP 14F, Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class 1, Division 1 and Division 2 Locations, Fifth Edition, July 2008. Global Standards

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Systemic Failure

holistic failure failure at system level which cannot be simply described from the individual component failures of the system Note 1 to entry: Systemic/holistic principles have been concisely summarized by Aristotle by “The whole is more than the sum of its parts”. Note 2 to entry: Components have only failure modes. Those failure modes become dangerous, safe or spurious only when the components are implemented into a safety “system”. This is why dangerous, safe or spurious failures are typical systemic failures. For example the failure “fail to close” of a valve is dangerous only if it belongs to a safety system closing this valve on demand. Otherwise this failure mode does not matter. Note 3 to entry: “Systematic” failures (i.e. occurring in a deterministic way when given conditions are encountered, see 3.2.17) and “systemic” failures should not be confused. Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards  

Systemic Failure

failure that consistently occurs under particular conditions of handling, storage or use Note 1 to entry: The cause of a systematic failure originates in the specification, design, manufacture, installation, operation or maintenance. Its occurrence is precipitated by particular conditions of handling, storage, use or maintenance (see Figure G.3) Note 2 to entry: Corrective maintenance without modification will usually not eliminate the failure cause. Note 3 to entry: A systematic failure can be reproduced by deliberately applying the same conditions, e.g. in verifying the failure cause (from IEC 60050–191 ed3[14]). Systematic failures are non-random failures (see 3.2.16). Note 4 to entry: In operation, a systematic failure is a manifestation of a systematic fault (i.e. a pre-existing state of the system). Note 5 to entry: The software systematic failures, called “bugs”, are example of systematic failures: they are due to pre-existing bugs (i.e. faults) and they occur when the input data activate them. Note 6 to entry: Systematic and systemic (which means “at system level”) failures (see 3.2.8) should not be confused. [SOURCE: IEC 60050‑191]   Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards

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Systems approach

For this document, systems approach will be defined as the loads or combination of loads along the length of the well. Generally, these loads are the result of pressure, tension, bending, and compression loads (both dynamic and static) on the components that will be transferred from component to component as these components are connected in the well configuration. These loads generally are transferred to the earth at the shoe through a cemented shoe joint, along the cemented casing and at the wellhead. Source: API TR 1PER15K-1, Protocol for Verification and Validation of High-pressure High-temperature Equipment, First Edition, March 2013. Global Standards  

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Systems Development

In the NICE Workforce Framework, cybersecurity work where a person: Works on the development phases of the systems development lifecycle. From: NICE Workforce Framework. Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards

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Systems Requirements Planning

In the NICE Workforce Framework, cybersecurity work where a person: Consults with customers to gather and evaluate functional requirements and translates these requirements into technical solutions; provides guidance to customers about applicability of information systems to meet business needs. From: NICE Workforce Framework. Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards

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Systems Security Analysis

In the NICE Workforce Framework, cybersecurity work where a person: Conducts the integration/testing, operations, and maintenance of systems security. From: NICE Workforce Framework. Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards

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Systems Security Architecture

In the NICE Workforce Framework, cybersecurity work where a person: Develops system concepts and works on the capabilities phases of the systems development lifecycle; translates technology and environmental conditions (e.g., law and regulation) into system and security designs and processes. From: NICE Workforce Framework. Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards

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“Steep S” riser

The “steep S” riser is similar to the “lazy S” except that the lower section of the flexible pipe between the buoy and the riser base is used as a tension member. The riser base replaces the deadweight anchor. Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards  

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“Steep wave” riser

The “lazy wave” and “steep wave” riser designs use an appropriate distribution of small buoyancy modules along a section of the riser to replace the pipe tray and subsurface buoy. Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards