RISK ANALYSIS

Pantac System Control provides a full suite of functional safety analysis services specialising in rotating machinery, combustion and power generation applications.

HAZID, Hazard Identification Study

HAZID studies are systematic critical examinations of facilities to identify any potential hazards and the consequential effects on the facility as a whole. A HAZID will often address both process and non-process hazards

HAZOP, Hazard and Operability studiesA hazard and operability study (HAZOP) is a structured and systematic examination of a complex plan or operation in order to identify and evaluate problems that may represent risks to personnel or equipment. The intention of performing a HAZOP is to review the design to pick up design and engineering issues that may otherwise not have been found. The technique is based on breaking the overall complex design of the process into a number of simpler sections called ‘nodes’ which are then individually reviewed. It is carried out by a suitably experienced multi-disciplinary team (HAZOP) during a series of meetings. The HAZOP technique is qualitative, and aims to stimulate the imagination of participants to identify potential hazards and operability problems. Structure and direction are given to the review process by applying standardised guide-word prompts to the review of each node. The relevant international standard calls for team members to display ‘intuition and good judgement’ and for the meetings to be held in ‘a climate of positive thinking and frank discussion’

CHAZOP, Controls and Hazard studies

CHAZOP is a procedure for carrying out the safety and reliability analysis of existing or planned Control and Computer systems. The execution of a CHAZOP can take several forms (process and / or hardware reliability based) depending on the focus and goal of the study.

LOPA, Layers of Protection Analysis

LOPA is a method used to evaluate high-consequence scenarios, determining if the combination of probability of occurrence and severity of consequences meets a company’s risk tolerance.

FTA, Fault Tree Analysis
FTA is a type of failure mode analysis in which an undesired state of a system is examined. This analysis method is mainly used in safety engineering and reliability engineering to understand how systems can fail, to identify the best ways to reduce risk and to determine event rates of a safety accident or a particular system level (functional) failure. FTA is used in the aerospace, nuclear power, chemical and process, pharmaceutical, petrochemical and other high-hazard industries, including Low demand probabilistic studies and High demand frequency based failure mode analysis.

 

SIL, Safety Integrity Level Assignment studies

Safety Integrity Level: it is a discrete level (one out of a possible four) for specifying the safety integrity requirements of the safety instrumentedfunctions to be allocated to the E/E/PE safety-related systems

SIL, Safety Integrity Level verification analysis

SIL verification analysis demonstrates the capability of a Safety Instrumented Function (SIF) of meeting the Safety Integrity Level (SIL) assignment specification in accordance with IEC 61508 and IEC 61511 against the following requirements:

  •  Quantifying the effect of random hardware failures (Probability of Failure on Demand (PFD) or the Average Frequency of Dangerous Failures (PFH))
  • Hardware safety integrity architectural constraints (Safe Failure Fraction (SFF), Hardware Fault Tolerance (HFT), Element Type A or B)
  • Systematic capability
  •  Common Cause Failure (CCF)