Material handling expert and popular Ask Joe! columnist Joe Marinelli recently completed his eighth video in the lecture series Bulk Solids Handling, which can be viewed on this website at the Online Training Center. 

The seminars include downloadable class notes and a self administered quiz with answer sheet. The seven-day subscription allows the purchaser to watch and review a video class as many times as needed. Classes last about 50 minutes and can be viewed online for just $39 US for a seven day subscription, a real bargain considering what most online training classes and webinars of this quality cost.

I expected that cost would be the main motivator for the growing trend in online professional training. Likely recession-driven cuts in travel and training budgets have stimulated some growth in online training, but I learned that speed and the convenience of 24/7availability seem to be the leading factors.

"The ability to get fast access to the information you need and view it on your own schedule have been a huge benefit to engineers who have taken the courses, Powder and Bulk Dot Com publisher Joe Taylor told me. "One of the best examples was an email I got just a few weeks ago from an engineer in Europe. He went to our Online Training Center to get a crash course on the options available to solve a particular bulk material flow problem and prepare himself for a presentation to management the next day."

Joe said this example of "just-in-time training" has emerged as one of the more compelling benefits of professional online training. He said lecturers are available to answer questions via email, phone and fax. "Those who attend our classes can pause the video at any time to fire off a question to us," Joe said. "Some really productive dialog has resulted." More seminars are in production. They will feature other leading industry experts and cover a wide variety of process industry operations. Current classes include:

Lecture 1:  Flow Problems - Their effects and flow patterns

Lecture 2:  Design principles for reliable flow - wall friction, flow functions, bin design parameters

Lecture 3:  Feeders, both volumetric and gravimetric - volumetric screws, belts, rotary valves, plus gravimetric & loss-in-weight feeders

Lecture 4:  Measuring bulk solids flow properties - shear testing, variables that affect properties

Lecture 5:  Particle segregation - segregation mechanisms, solutions to common problems

Lecture 6:  Flow aid devices - assistance to gravity flow, air blasters, vibration & fluidization techniques

Lecture 7:  Hopper retrofits to existing systems - cones vs. wedges, hopper liners & special inserts

Lecture 8:  Design examples - determining hopper geometries using the Jenike approach 

Don Dunnington
Blog Moderator

Web surfing may be improving your mind in more ways than you expected. UCLA scientists have announced results of a study in which they found, according to the University's Rachel Champeau, "middle-aged and older adults with little Internet experience were able to trigger key centers in the brain that control decision-making and complex reasoning after just one week of surfing the Web."

The findings were presented at the 2009 meeting of the Society for Neuroscience. According to Champeau, "Research has shown that mental stimulation similar to that which occurs in individuals who frequently use the Internet may affect the efficiency of cognitive processing and alter the way the brain encodes new information."

While the study focused on an older population, the researchers hope to address the impact of the Internet on younger individuals in future studies. Their goal is to identify aspects of online searching that generate the greatest levels of brain activation.

In this latest study 24 "neurologically normal volunteers" were selected between the ages of 55 and 78. Prior to the study, half the participants used the Internet daily, while the other half had very little experience. Age, educational level and gender were similar among all participants.

Study participants performed Web searches while undergoing functional magnetic resonance imaging (fMRI) scans, which recorded subtle brain-circuitry changes experienced while browsing. After the initial brain scan, participants went home and conducted Internet searches one hour a day for a total of seven days over a two-week period.
 
In the first scan, participants with little Internet experience demonstrated brain activity in regions controlling language, reading, memory and visual abilities. A second brain scan of the same participants, after they had accomplished their Internet searches at home, demonstrated activation of these same regions, plus additional areas of the brain important for working memory and decision-making.
 
Researchers concluded that, "after Internet training at home, participants with minimal online experience displayed brain activation patterns very similar to those seen in the group of savvy Internet users — after just a brief period of time."

Prior research by the UCLA group found online search activity resulted in more than a twofold increase in brain activation for those with prior browsing knowledge, compared with those with little Internet experience. If you've been lagging in your own Internet searching, there's still hope: The new UCLA research suggests it may take just a few days for those with minimal experience to match the activity levels of those with years of experience. If you have a co-worker or supervisor who seems to be falling behind in their Internet use, you might do their brains a favor by forwarding this article to them!

Don Dunnington
Blog Moderator

I recently was able to speak in front of a group of 40 engineers representing some 1,000 years of experience in bulk solids material handling at the October meeting of the HMHS (Houston Material Handling Society).  This was truly a humbling experience for me ....... and one I took very seriously so I was not going to present a commercial.

A friend of mine recently wrote an Op-Ed for an automation magazine and in his editorial he said some things that I really identified with and I felt the HMHS engineers could benefit from so I started of the meeting with some quotes from Dr. Peter Martin's editorial in the September issue of InTech magazine where he stated that "engineers must step up and assume a leadership role within their companies by helping drive new levels of business performance". 

He further stated that the reason most companies don't understand the true benefit of the engineering discipline is that "most financial systems cannot measure the improvements" that engineers make.  I decided that my discussion about "recent directions in level monitoring and measurement of bulk solids" needed to provide these engineers some tidbits they could use to "add value" to their companies performance.

Want to know more? Click here for the rest of the story.

Lessons Learned from Fatal Events - Alternatives and consequences

Industrial Accident Analysis Dichotomy 
• Search for the real cause and implement effective corrective actions
• Or find the “appropriate person to blame” and do nothing else

Based in the article See & Flee in the Petrochemical Industry, by Jim Whiting and on 32 years of personal experience in design start-up, operation, and troubleshooting of direct reduction plants worldwide.

Investigations on fatal events in industrial plants in Mexico, Malaysia, Indonesia, India, and the North Sea, as well as in Australia according to Jim Whiting, bring a question to mind.
 
Were the workers aware that the mine conditions were unsafe and was that awareness translated into actions to reduce the risk?  Or was the risk accepted as part of the job?

Especially after the recent evidence at Pasta de Conchos (explosion in a coal mine in Northern Mexico), and the “heroic” declarations of some politicians: “We will not rest until we have found and punished the person responsible!”

Particularly, in one of the companies where I was employed, a few years ago, two operators died in an explosion, there was a ball a fire that covered them during one of the product discharges.  Unfortunately this was not an isolated event.

I remember the work environment and the spirit that moved us.  Production is first, personal security was never mentioned, even though the official speech would say otherwise.   We thought we were expected to be “machos”.

Nobody wanted to appear as a “chicken”.

In that period, even the use of dust masks was socially unacceptable.  The use of fall arresting harnesses indicated fear or insecurity, and was taken as a bad example for the rest of the workers. 

“Nothing is going to happen!  We have worked like this for more than 35 years; we are not going to back up now, are we?”   This was said to me by one of the company’s VP’s, when he wanted to install a video camera in the open discharge of one of the new reactors.  When I was explaining to him that the camera had open electronic components and that the atmosphere was explosive, and that the dust was electrically conductive, he said to me “we’re not going to chicken-out, are we?”  

I had to think fast and melt the fuses in the camera, so that we could not use it.  I then designed a rig to put the camera in with minimum risk.  The end result was there was indeed an explosion, but, fortunately, nobody was hurt, as they were using the appropriate equipment. 

I lost the opportunity to move up in the administrative ladder, as there were two Vice Presidents and one Manager looking down into the reactor that day!

Explosions in the reactor’s charge and discharge were frequent; the balls of fire were, literally, fireworks.   The personnel would play, throwing objects from high platforms to the new engineers.  We would laugh at their fear when they heard an unexpected (for them), explosion. 

Intoxicated employees and flames during maintenance and operation were part of the environmental conditions, especially in some of the loading bins and quench towers, where, more than once, we retrieved unconscious, burnt and, sometimes, deceased personnel.

Reports and discussions were confronted with opinions from people in higher positions with no on-site experience, or that were so brave as to not visualize the danger.  A report on a risky situation was a sign of not wearing the company’s T-shirt, and it was a terminal career move.

But we never ran, we would always return to work, once the ball of flame had passed.  Actually, we were really never afraid.  Nobody reported anything, we all knew the environment we worked in and we considered it exciting and part of our work.  Those who would stay away were criticized and stigmatized.
  
The question now is, how do we train the operators and maintenance personnel on when to run or when to be “macho”? 

When is it OK to be afraid?  

Unfortunately, in Mexico, the consequences for a fatal accident in a company are few, even though the official speech may deny it.  So there are hardly any effective motivational and disciplinary policies, besides signs and useless statistics. 

In some cases, the consequences have been limited to the loss of production, during the time it took to clean-up.      

In Australia, in comparison, a plant can be shut-down indefinitely.

In other countries, the insurance company can refuse to pay de damages, and fines for a fatality are charged automatically, even before the investigation, and they can be considerable.  

Even so, “the culture of production is first”, it is universal… and it extends to nuclear installations and even to NASA.

And the phobia to use the emergency shut-down button also.

Many years ago, when we were beginning to make use of computers to control chemical plant operations, we decided to install controlled shut-down buttons, baptized as “the panic” buttons.

Few of us could clearly see the conditions under which they should be activated.

We only knew that shutting down a complex installation without assistance from the control system was very difficult, due to the number of variables that the operator had to have in mind.  (This button was installed after a catastrophic incident, similar, in sequence, but not in consequence, to the one in Chernovyl.) 

Each operator would establish the criteria for activating the “panic” button.

An unfortunate name as it implied the lack of ability of the person who activated it.  Our people were reluctant to activate the “panic” button, as it meant that they were afraid of something.

Years later an effort was made to change its name to CSB (Controlled Shutdown Button), a difficult task in the petrochemical industry.  At least the name was changed in some drawings! 

Later on, due to the persistence of one of the production managers, the shutdown button was used every time they had to shutdown the plant.  So the “panic” part of activating the button was finally lost, and became a very comfortable addition to the operation environment. 

A related incident happened not long ago, two operators followed by a Manager went to a platform to correct a problem.   They all knew they could have the option of shutting down the plant, nevertheless, they decided to solve the problem, without using the panic button.

The apparent process control loss and the record of recent repeated plant shutdowns made them take a high risk decision that took their lives. 

The situation had never been analyzed or drilled. 
 
They made the wrong decision as a team (they did not work as a team; they supported the wrong decision due to an incorrect concept of solidarity.

The technical problem was finally tracked to a poor control loop tuning (the plant had been built using multiple contractors, each one supplying its own control system); the conflicts between control systems led them to block all but one computer during start-up, a shortcut that would cost them dearly. 

But the issue here is, what led them to decide to put their lives on the line, when there was the option of shutting down the plant and starting-up again?

As with all investigations, pertaining to human performance problems, the principal challenge is to:

• Analyze which were the “good reasons” that made them take that risk. 
• See what they took into account that made them believe that their opportunities of winning were better than those of loosing.

All this behavior depends on the perception of risk.  Which was and is the perception of risk of the miners in the coal mine industry?

Three perceptions have been considered for this incident, at least, to try to interpret the motivation of the operators that died and the rest of the personnel involved.

1. One setting could be that they intentionally, or unintentionally, did, or did not do something that had created the problem, and they believed that they could correct the problem before anyone else could find out, possibly to avoid a professionally embarrassing situation or for fear of disciplinary actions.  To activate a stop button and shutdown the plant would make everyone aware of the problem.  They believed that, if they could solve the problem without stopping the process, then nobody would find out what had happened.   In that particular case somebody had pushed the start-up button again, resetting the computer block-out during start-up.  (The buttons were too close together and the operator’s attention was on controlling a dome.) 
2. The second setting is that the emergency stop button had been given the name of “panic button” or “chicken button”.     

During our investigations we discovered: 

• That there was a cultural expectation established among all the workers and management process, that the plant should not shut down for any change, unless you were “chicken”.
• Management would award those who were known to have been able to make a change without shutting down the plant. (They would also give more importance to the people who spoke English, no matter how inefficient they were.)
• This perception was reinforced when management would give contradictory or ambiguous messages referring to when to use the emergency stop button or the shutdown control button to stop the plant.  
• Management honestly said that they had never told the operators not to use the stop button, and they probably frequently said otherwise, “your safety is more important than the process”, you have the power to shutdown the plant when you consider it necessary” and other similar euphemisms.
• BUT there had been some previous incidents when someone had shut the plant down and management had commented almost simultaneously, “Yes, you should have pressed the stop button, BUT we lost $250,000 Dollars worth of production”.  The message that was relayed to the operators was ambiguous and they were left with a feeling that they had done something wrong.
• Adding to this, the personal image of the plant manager was that of a GI at work, people were afraid of discussing any issue with him.

You will agree that, frequently, the influence or pressure of our peers or bosses can have a great effect on how we perceive risk and how we perform in our jobs.

The third perception is familiar to all who have started plants up.  There are many actions required in a plant start-up.  There is much equipment involved and, normally, few people on hand.  Therefore, the decision to shut-down the plant also takes into consideration the perception of the amount of work and time it takes to re-start it. 

3. This third perception could be the main reason why the organization, not to say the operators, avoided activating the controlled shutdown button and do whatever possible to maintain the plant operating; in many cases not having the foresight of the risk that is being taken.

The message should be clear – and should be clear in the minds of Management, that all levels of the organization should frequently discuss the risk perceptions and risk expectations, as to how to handle tolerable/intolerable risk situations for special and real settings in their immediate work environments. 

Fatal accidents, in particular, project a provocative and valuable concept, to be considered always in the meetings prior to the work and risk evaluation. Although we cannot give the names of companies or people that are involved, we can describe the conditions that gave origin, and their consequences, hoping the lessons will be useful for all, and hoping that you will never need to live these situations. 

One of these could illustrate the case.

The operators knew, through smell, sounds and vibrations that an explosion was imminent and “saw and fled”; the supervisors stayed behind and died. 

a) What determined that the supervisors should stay behind?
b) What was their perception of risk, conscious or subconscious?
c) And, their perception of duty?
d) What finally determined their behavior, and why did they stay?
e) Why do only the good employees get hurt and, sometimes, die?  
f) Did the supervisors relieve that their boss’ wanted them to stay and die?
g) Did the supervisors ignore the risk?
h) Did they accept it consciously?

Some questions come to mind:

1) Was this discussed at any moment, among themselves, as to when they should stay and solve the problems, or when to run?  Was this ever on the agenda?
2) Did their bosses ever discuss and analyze this setting at a previous meeting?
3) Did the operators consider themselves less responsible for the plant security and therefore ran?
4) Did they ever have a meeting with Management addressing this situation explicitly?
5) Was the company implicitly encouraging the supervisors to be in risky situations?
 
Using the knowledge we have gained after the incident, we ask:

Why didn’t we do what we were supposed to have done?
And now that we know what we have to do, why are we not doing it?

 Confucius said at one point:

“If you know what you need to do and you do not do it,
then you are worst than before “

 “To see what is right and not to do it, is want of courage”

The questions are actually simple.

From the answers, we should obtain actions to carry out, and not only assign guilt.

Actually, finding a guilty person or persons serves to satisfy the desire of vengeance; to try to destroy the opponent’s image little by little, will not reflect in substantial improvements.

The person selected as guilty will simply be substituted by someone else, possibly with less training and surely with less experience, who will be afraid of taking any decision.

Some questions that can be asked are:

• How many more settings of “see and flee” can be identified in our work places before having to take that decision when the time comes?

• Is there a trans-functional communication protocol that will inform us of other dangerous conditions?

All these questions should be made and discussed regularly, evaluating the answers, planning, practicing and stage-managing the actions and reactions within the work groups in your installation. 

In the theatre, war and emergencies…

“You are what you drill”

• A systematic incident analysis tool used in many nuclear plants and employed to find root causes and the appropriate solutions, has proven over and over, how useful it is in the proactive risk evaluating process.  For more information check their site www.taproot.com

A final challenge to be used in safety and hygiene group discussions at work is, what it means to be a hero (especially in the case of underground mining management and nuclear and petrochemical operations):

• Have you taken risks you should not have taken?
• Have you not reported deviations that could cause a tragedy, for fear of being seen as a coward?
 
To center a fatal incident analysis, in the search of someone to blame and to finish the analysis when that person is found, is a recipe for disaster.

Finding the root cause and taking the appropriate corrective actions is the only way out of the spiral.  Closely following the corrective actions, and making sure they have done their job properly, will be the first step.   If the information flow channel is kept open and objective between operation and management, this will insure further improvement, and a safer working environment.

Article by:
M. C. Marco A. Flores V.
tecmen1@gmail.com
TECMEN SA de CV
Applied Innovation

and

J.F.(Jim) Whiting
jim@workplaces.com.au
Risk@Workplaces Pty. Ltd.

I was surfing around the other day and ran across the website of Spitzer & Boyes.  They are a consulting firm, they do training and write books and columns.  I spoke with David Spitzer, one of the authors, to see if he would be interested in guest authoring at the level measurement blog, but he gets paid to write and speak.  Any way, the book looks good but I haven't read it. 

The cost of the book is $250 and can be ordered from Amazon or click here.

Non-contact level sensors are a hot topic so this is why I thought you might be interested in this book.  However, contact level sensors (they are working on this book too) should never be ruled out and in fact I feel they are the best choice for most all applications. 

Open-air devices always have to deal with the internal vessel environment.  This especially true for powders.  I have found that the best technology available for continuous level measurement of powders is guided wave radar as this case history illustrates. 

And for granular plastics?  The leading technology is smart cable-based inventory monitors.  This is what ThomasNet can find on that subject.

Got an application you need to discuss?  Post a comment.  It's easy.

Joe Lewis