Accident Investigation & ReconstructionElectro-Mechanical EngineeringEngineeringIndustrial AccidentOSHA

Steel Mill Electric Arc Furnace Accidents

Steel mill electric arc furnace manufacturers and employers must be required to properly train workers to ensure a safe working environment. The following Case Scenario is an example of how improper training can lead to egregious harm and even death.

Steel Mill Electric Arc Furnace

Case Scenario: Death On A Steel Mill Electric Arc Furnace

 

By: David Kobernuss, BSEE, MSEA, PE
Tel: (315) 336-2808

Expert’s Job Assignment

To assist with the case by the plaintiff widow against a third party industrial company and various contractors.

Case Synopsis

Maintenance work was being done on a three phase AC electric arcfurnace that was about 30 feet in diameter. It was shut down for some extensive repairs. There were many different crafts and contractors working on different aspects of the repairs and many of them were out of sight of others.

The deceased was welding on the support section of one of the three electrode arms that hold and carry current to the main electrodes that do the melting in the furnace. The clamping section had been removed so that he could get access to the damaged area that was to be repaired, and it was being held up about 10 feet above him by an overhead crane, by means of a chain assembly on the main crane hook. The removed clamping section was an assembly of aluminum and copper that weighed over two tons.

By means of a spurious electrical signal the control circuit for the furnace sent a signal to raise all three electrode arms. The stored energy in the hydraulic accumulators did just that: all three electrode support posts rose up to their full height. In doing so one of the other arms hit the suspended clamping section and dislodged it from the overhead crane. It fell and killed the welder below.

Expert analysis

  1. The control system for the furnace required that there be a large hydraulic accumulator for each phase electrode in order to be the source of a large volume of oil so as to move the electrodes faster that the hydraulic pumps could supply the oil. These were piped to the electrode cylinders through 4 inch diameter pipes.
  2. . . . Read Entire Article

David Kobernuss, BSEE, MSEA, is an Electro-Mechanical Engineering Expert who specializes in Industrial Accidents, Machine Performance, Electrical Accidents, Shock and Electrocutions.

Computer ForensicsComputer SecurityComputers

Computer Safety and Security Articles

CYBER ABUSE, CYBER CRIME

By: Richard Albee
DataChasers, Inc.

Tel: 877-DataExam (877-328-2392)
Website: www.DATACHASERS.COM

The Internet is a vast universe of discovery, with items of interest for everyone–regardless of your particular curiosity. Unfortunately, this availability often leads to abuse, and sometimes to crime. But, not unlike adolescent discovery, the steps to cybercrime are achieved in stages.

The first stage is availability

Without access to the Internet the potential for abuse becomes a moot point. It was common, several years ago, to simply advise employers against allowing employees access to the Internet; this is no longer practical. Internet access is an integral part of many businesses, and certainly a part of everyday life…
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DataChasers, Inc., is a select, exclusive computer forensics and e-discovery company. Our examiners find the evidence, interpret it, evaluate its importance, and articulate those facts to a jury. Computer forensics and e-discovery is our only business, and we welcome your inquiries about the process, or our procedures.

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CSI COMPUTER FORENSICS – Real Cases From Burgess Forensics #9 – The Case of the Teacher and the Trickster

By: Steven G. Burgess
Tel: (866) 345-3345

Website: www.BurgessForensics.com

The stories are true; the names and places have been changed to protect the potentially guilty.

It was a grey October day, the kind of day when a guy likes to cozy up next to a bank of servers to keep warm, when the Teacher first called me. “They think I’m nuts” were the words emanating from the phone. Well, just because you’re paranoid doesn’t mean they’re not out to get you. I sat up and went to my desk, away from the noisy fans cooling off all those Gigahertzes. “What’s the problem, Miss?”

The young woman explained that she was a not-yet-tenured teacher in a New England (greyer there than here) high school with a problem. Seems that a student in one of her classes was repeating things in the classroom that she had uttered only the night before in the apparently illusory privacy of her own living room…
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Steve Burgess is a freelance technology writer, a practicing computer forensics specialist as the principal of Burgess Forensics, and a contributor to the just released Scientific Evidence in Civil and Criminal Cases, 5th Edition by Moenssens, et al.

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