Prior Use

Prior Use Assessment.

Prior Use Assessment

 

IEC 61511 requires devices that make up a Safety Instrumented Function (SIF) to be either, assessed against the requirements of IEC 61508 or against the requirements of “Prior-Use”. Many facilities utilise equipment that is used in both Safety and Control functions and the operator has gained experience and confidence in these devices. In these circumstances, Prior Use may be considered a more suitable (and logical) alternative to replacing these devices for IEC 61508 assessed items of which the operator has no experience.

 


Why FSES?

 

FSES can conduct the assessments for sensing elements, logic solvers and low complexity devices such as solenoid valves, actuators, valves and relays. A key requirement is recording and analysis of failures encountered during operation, if necessary FSES can assist in putting in place a strategy to achieve this. For more information, or to discuss your needs for conducting the Prior Use assessment, please contact us using the form below or email info@fses.global.

Our Services at FSES

Compliance to the international Standards such as IEC 61508 and IEC 61511 are imperative to meeting the Functional Safety requirements for many processes and have formed part of the quality management systems of many companies. Provision of Functional Safety Services in line with the Phases and Activities detailed in the Safety Life-cycle is an area in which our consultants are able to demonstrate experience and expertise.

Learn more about our services

PHA, HAZID and HAZOP Studies

FSES can provide Process Hazard Analysis (PHA) and HAZard and OPerability (HAZOP) study chairpersons. Our expert PHA facilitators hold certification in conducing HAZOP, HAZAN and CHAZOP.


Functional Safety Training

FSES provide various Functional Training services for all of specific parts of IEC 61508 and its sector derivatives.


Consequence Modelling

Discharge and Dispersion is often required to evaluate the consequence of identified hazardous events.


Design Engineering

Functional safety activities are most effective by integration into a well-established and proven quality management system.


Building Risk Assessment

Building Risk Assessment (BRA) is a tool used to assess the risks to people in occupied buildings in the facility.


Dropped Objects Analysis

Dropped Objects Analysis


Escape, Evacuation and Rescue Analysis

Escape, Evacuation and Rescue Analysis ensures that the design of a facility is such that the risk to personnel is kept to within the ALARP region.


Functional Safety Assessment

Independent Management of Functional Safety Assessments, Audits & Support.


Functional Safety Lifecycle and Management

Functional Safety Lifecycle and Management is a key requirement demonstrating how Functional Safety is to be implemented and achieved.


Human Factors

Human factor assessment is a key area in identifying potential hazards which may be instigated by human errors.


Legacy Systems

Legacy Systems Review and Compliance.


Prior Use

Prior Use Assessment.


Proof Testing Procedures

Proof Testing is one of the main requirements to ensure that Functional Safety is maintained throughout the operational phase.


Operation and Maintenance

FSES can carry out review studies and provide consultancy to ensure Functional Safety requirements are maintained during Operation and Maintenance.


Quantitative Risk Assessment

Quantitative of Risk in terms of IRPA, PLL and graphical demonstrations such as FN Plots.


Reliability, Availability and Maintainability Study (RAMS)

Reliability, Availability and Maintainability Study (RAMS) is used as a decision making tool to increase the availability of the system, and thus increase the overall profit as well as reducing the life cycle costs.


Process Hazard Assessment (PHA)

FSES can provide Process Hazard Analysis (PHA) and HAZard and OPerability (HAZOP) study chairpersons. Our expert PHA facilitators hold certification in conducing HAZOP, HAZAN and CHAZOP.


Safety Requirements Specification

The Safety Requirements Specification (SRS) is a core document, which is used as the main reference to be followed by designers, installers, and operators of a Safety Instrumented Function (SIF).


SIL Determination

FSES are able to us various methods in identifying SIL targets; qualitatively by Risk Graphs, semi-quantitatively by Layers of Protection Analysis (LOPA) or fully quantitatively by Fault Tree Analysis (FTA).


SIL Verification

Calculation of Random Hardware Reliability and Architectural Assessments for Safety Instrumented Functions (SIFs).


SIS Conceptual Design

Safety Instrumented System (SIS) Conceptual Design.