HAZID, HAZOP, Control-HAZOP & SIL Study for Sagar Laxmi Modification Project with Bureau Veritas
Location: Mumbai High
Chairman: Mehtab Shaikh
ONGC intends to develop the B127 cluster of three marginal fields (B-127, B-157 and B-59) located north of Mukta JV and additional development of B”55 field. The B-127 cluster development will have three well platforms B-127, B-157 and B-59. As part of the B-127 cluster development strategy, ONGC intends to deploy Sagar Laxmi Jack up production platform (MOPU) along with SBM near to B-127 platform in water depth 55 m for handling B-127 cluster oil and gas. Sagar Laxmi Jack-up production platform is a converted production platform (MOPU) from Jack up Drilling Rig Sagar Vikas to a Mobile Offshore Production unit.
Hazard Operability (HAZOP) is aimed at assessing the hazard potential of malfunction or mal-operation of individual items or equipment by all possible scenarios and the consequential effects on the facility as a whole. HAZOP identifies any process / operational deviation from intended operation, determines the causes and consequences of these deviations and identifies any available safeguards. If the safeguards are found inadequate, recommendations / actions are proposed.
Hazard Identification (HAZID) review is a structured brainstorming technique that is particularly useful in the early stages of a development. Conducted as a workshop involving experienced engineers from various disciplines, the HAZID chairman poses creative questions to the team to explore potential hazardous events/situations that could be realized. The success of this approach therefore greatly depends upon a properly constructed team being well managed and having the opportunity to think beyond the ordinary and to identify the unusual.
Control Systems Hazard and Operability Study (CHAZOP) systematically review the design and operation of a control and safety system to identify potential hazards and/or operability problems. It focuses on how a control or safety system may deviate from the design intent, and draws on the expertise of the team members and their past experience with the design and/or operations of similar facilities.
Safety integrity level (SIL) is defined as a relative level of risk-reduction provided by a safety function, or to specify a target level of risk reduction. The ANSI/ISA S84.01 and the IEC 61508 standards suggest that the effects of the random failures must be evaluated in a quantitative way by utilizing Safety Integrity Levels (SIL). SIL is a statistical representation of the availability of a required safety instrumented function. There are 4 SIL designations provided in ANSI/ISA S84.01 and IEC 61508; SIL 4 has the highest level of safety integrity and SIL 1 has the lowest.