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A System-Theoretic Hazard Analysis Methodology for a Non-advocate Safety Assessment of the Ballistic Missile Defense System, Steven J. Pereira, Grady Lee and Jeffrey Howard

This paper presents a safety assessment methodology based on STPA (a systems-theoretic hazard analysis); the assessment methodology provides an organized, methodical, and effective means to assess safety risk and develop appropriate hazard mitigations regardless of where in the life cycle the assessment is started.


Fire Risk Assessment, Albert V. Condello III

A PowerPoint presentation covering the system safety approach to fire risk assessments. A five step fire risk assessment procedure is covered.


Involve Engineers in Ergonomics, Kent Hatcher

Poor safety performance is a consequence of engineering design that fails to fully consider human interaction in the system. Engineers play a critical role in proactively designing jobs and equipment with low ergonomic risk, as well as reactively reducing existing exposures in the workplace. Therefore, to not have site engineers participate in your site ergonomics initiative puts you at an immediate disadvantage.


Inherently Safer Design: Key Elements, Dennis C. Hendershot

Inherently safer design (ISD) is a philosophy for addressing safety issues in the design and operation of facilities that use or process hazardous chemicals. When considering ISD, the designer tries to manage process risk by eliminating or significantly reducing hazards. Where feasible, ISD provides more robust and reliable risk management, and has the potential to make the chemical processing technology simpler and more economical by eliminating the need for expensive safety systems and procedures.


Temporary Worker Died While Cleaning a Double Auger Screw Conveyor Machine, ASSE

On Dec, 16, 2011, a 28-year-old male temporary worker (victim) was fatally injured while cleaning and sanitizing a double auger screw conveyor machine (feed pump skid). The victim was reportedly cleaning the machine’s tub while the machine’s double augers were rotating. Both of the victim’s arms became caught in the double augers and he was pulled into the machine. A co-worker heard the victim yell, saw the victim being pulled in and stopped the machine with the emergency stop. Another co-worker ran to call emergency medical services (EMS). Personnel from the local and state police departments, fire department and EMS all arrived after the calls.


ANSI Z10 and PtD Standards Integration , Georgi Popov

EHS professionals are facing increased pressure to diversify their skills and develop new risk assessment techniques. A small size company requested a new product risk assessment and hazard evaluation. The product is intended for export to the European Union and had to meet international standards. On the other hand, the product is manufactured in the USA and the management wanted to implement PtD principles. The authors developed new tools and successfully implemented the new PtD model to evaluate the product.


Business Risk: Electricity, Vincent R. Miller

Electricity is the most common commodity for business operations, yet it is the least understood of all processes. An infrastructure failure that results in a loss of electrical service can have devastating consequences.


Fires, Fact & Fiction, Scott M. Margolin

Over the past 2 decades, there have been reasonable debates and less reasonable marketing regarding the duration and energy of hydrocarbon flash fires, despite the fact that existing North American standards are quite clear on the subject. NFPA and CGSB (Canadian General Standards Board) both define flash fire with identical technical language: the main factors being diffuse fuel in air, an ignition source, a rapidly moving flame front, and a consequent duration of 3 seconds or less.


Semi-Permanent Fingertip Tactile Sensitivity Loss in Cold Environments, Brian J. Finder

Current research indicates that acute non-freezing cold exposure elicits various short-term performance problems with the human extremities; namely a reduction in blood flow (Abramson, Zazela & Marrus, 1939), hand sensitivity (Nelms & Soper, 1961), the level of upper extremity dexterity (Clark, 1961), and maximal grip strength (Barnes & Larson, 1985). The present body of scientific knowledge has yet to confirm that repeated/chronic cold exposure causes a more long-term or semi-permanent form of nervous system impairment in humans.


Prevention through Design-Slips, Trips, and Falls - VIDEO, Wayne S. Maynard

This presentation will review a managed approach to preventing slips, trips and falls with key emphasis on facility design not addressed in the International Building Codes and ADA. Applying human factors with Prevention through Design strategies starting with walkway surface material selection; use of color and contrast at transitions; planning pedestrian travel into a facility, stairway; and entrance design will be discussed.


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