ASP Fellowship II case studies
ASP Fellowship II · Put your knowledge to work in context.
ASP Fellowship II is an advanced-level credential for safety professionals who already understand the basics of system safety and want to demonstrate competence at the level of a program lead or principal analyst. It suits engineers, safety managers, and assurance specialists working in aerospace, rail, defence, energy, medical devices, or any sector where hazards must be identified, assessed, and controlled across a system lifecycle. The ASP Fellowship II case studies are 5 cases and about 3,968 words.
1Ammonia Refrigeration: ALARP Decision with a Marginal QRA
Northern Cold Storage runs a 4,800 kg anhydrous ammonia refrigeration system serving a 22,000 m² cold warehouse. Its corporate QRA, built on generic leak frequencies of 0.08 per vessel-year, IIAR dispersion modeling, and a 210 m distance to the nearest residence, predicts a maximum individual risk of 3.4×10⁻⁵ per year at that residence.
793 words, about 4 min2Alarm Flood, Operator Credit, and Fatigue in a Batch Plant
At a specialty chemicals batch plant, a 2019 DCS migration reduced configured alarm deadbands and left many points at default priority. The console now has 1,150 configured alarms across three reactor trains.
818 words, about 4 min3Firmware Change on a SIL 2 Ethylene Oxide Sterilizer
A contract manufacturer operates an ethylene oxide sterilization chamber. The SIL 2 safety instrumented function SIF-14 closes the EO supply valve and opens the emergency exhaust on high chamber temperature.
773 words, about 4 min4Relief System Adequacy After an Unreviewed Debottlenecking
A 35-year-old toluene storage and transfer facility is covered by OSHA PSM (29 CFR 1910.119). The two 1,200 m³ tanks have conservation vents and a common relief header.
776 words, about 4 min5Repeat Hose Failure: Investigating a Near Miss That Keeps Recurring
At a plating shop, a transfer hose on a 20% sulfuric acid line failed at the crimped fitting during unloading. About 40 L escaped, but secondary containment caught it and no one was injured.
808 words, about 4 min