Risk + Safety + AMC

QRA Study

Quantitative consequence + frequency analysis for plot plan and siting decisions.

Where do you locate the new control room relative to the cracker? What's the safe separation between the LNG tank and the road? Is the existing fire-water capacity adequate for the worst case? QRA quantifies it · consequence modelling, dispersion analysis, individual + societal risk contours. F&EI, PHAST, FLACS as the engine. Decision-grade evidence.

Why this matters

Why qualitative safeguarding leaves siting and capex decisions unanchored

HAZOP and LOPA tell you whether process safeguards are adequate. QRA tells you what happens when they fail · the dispersion footprint of an LNG release, the thermal radiation contour of a jet fire, the overpressure profile of a VCE. These results drive plot plan decisions (control room siting, building separation, mustering point location), siting decisions (LNG terminal next to residential? Refinery boundary clearance?), and capex justification (fire-water capacity, blast-resistant building envelope). QRA is the decision-grade quantitative tool that makes these conversations evidence-based.

Method

How we deliver QRA Study

CEng MIE India-signed deliverables · LiDAR-powered where applicable · digital twin handover ready · routes to the Risk + Safety + AMC practice lead within 24 hours.

Inventory + hazard identification

Inventory of hazardous materials. Release scenarios identified per HAZOP / past incidents.

Frequency analysis

Initiating event frequencies per OREDA / Cox-Type / Lees / your incident history. Probability of ignition + meteorological conditions applied.

Consequence modelling

Dispersion (PHAST / FLACS CFD where geometry matters), jet fire (thermal radiation), pool fire, BLEVE, VCE (vapour cloud explosion). Frequency × consequence per scenario.

Individual + societal risk

Individual Risk Per Annum (IRPA) contours computed. Societal risk F-N curves. Compared to tolerable risk criteria (HSE UK ALARP, OSHA PSM, your corporate criteria).

Recommendations + sign-off

Risk reduction options ranked. Plot plan / siting recommendations. CEng MIE-signed. Ready for board / regulatory submission.

Standards + compliance

Built to the standards your auditors quote

Reports reference the international and national standards your regulators, F500 audit teams, and corporate process safety leads cite. Every deliverable signed by a Chartered Engineer (CEng MIE India).

ISO 17776 · Petroleum and natural gas industries · Major accident hazard management
HSE PCAG · Process Industry Consequence and Risk Assessment (UK)
API RP 752 / RP 753 · Management of Hazards Associated with Location of Process Plant Buildings
EU Seveso III Directive · QRA for major accident hazards
NFPA 59A (LNG), API 521 (relief systems), NFPA 30

Anonymous case anchors

What this looks like in production

Three landmark engagements from our verified roster · quantified outcomes, no client names disclosed without written permission.

LNG terminal, Qatar · siting QRA

New jetty location · QRA-evaluated against existing residential boundary. F-N curve compared to HSE ALARP region. Siting approved with mitigation.

Refinery, India · control room siting

New control room location QRA-evaluated against worst-case VCE overpressure. Blast-resistant envelope specified to API RP 752.

Petrochem, KSA · boundary clearance audit

Existing plant boundary clearance audited against new residential development. QRA evidence supported regulatory case.

Frequently asked

QRA Study · the practical questions

PHAST or FLACS · what tool do you use?

PHAST (consequence + dispersion · industry-standard for plot plan QRA) for most engagements. FLACS (CFD-based · captures congestion-driven explosion overpressure) when the geometry matters · congested process plant VCE, building leakage, complex terrain dispersion.

What output formats do you produce?

Risk contour maps (individual risk), F-N curves (societal risk), consequence footprints overlaid on plot plan, comparison vs tolerable criteria. Board-ready visualisation + technical report. CEng MIE-signed.

Can QRA be used for siting decisions?

Primary use. New plant siting (greenfield), new building siting on existing plot, change of land use near existing plant. QRA evidence supports board, regulatory, and community engagement decisions.

How does QRA interact with HAZOP + LOPA?

HAZOP identifies scenarios. LOPA evaluates safeguard adequacy. QRA quantifies the consequence and societal impact of residual scenarios. Three connected layers · we deliver them together in major project safety case work.

Is QRA accepted by Indian regulators?

Yes · CER (Central Excise and Regulatory authorities) for petrochemicals, PESO for hazardous storage, MoEF for environmental clearance. The QRA output is standard evidence in EIA / safety case submissions.

Scope your QRA Study engagement.

Tell us your plant, region, and scope · a named Chartered Engineer responds within 24 hours.

4 fields. No phone interview to start.
Per-discipline routing to the Risk + Safety + AMC practice lead.
Anonymous case anchors sent with first reply.
Same-day callback for deadline-driven enquiries.

Risk + Safety + AMC Scoping

HAZOP/LOPA/SIL/QRA · 5-year AMC retainer · Practice Lead Safety responds in 24 hr.