Focus on O&M

Ultrasonic testing (UT) has long been a key method for detecting defects and service-induced degradation in nuclear and fossil plant components and for supporting remaining component life assessment. But it

Two hyperbolic cooling towers rise 495 feet over Exelon Corp.’s Byron Generating Station about 110 miles west of Chicago, Ill. The towers help cool the two Westinghouse pressurized water reactors that are capable of generating up to 2,346 MW at the site. Like all classic wet transfer hyperbolic cooling towers (Figure 1), the Byron Generating […]

Replacing blades on a wind turbine is not a simple task. Blades range from 40 to 60 meters in length and can weigh 16 tons or more. Combined with hub heights that can exceed 100 meters and locations that are, by definition, subject to prevailing winds, replacing blades becomes challenging. Add in the cost of […]

Shaft collars are used as stops or locators on shafts in a wide variety of applications. There are two basic types. One uses a setscrew to lock the collar in place, while the other utilizes a clamp-type collar. Shaft Collar Designs Setscrew collars are the oldest type of shaft collar. These units function by gouging […]

Many coal-fired power plants maintain fuel stockpiles for use when the normal delivery of coal to the plant is disrupted. It is not uncommon for a 30-day supply to be maintained in the pile. Most of these

Power plants use indicators to monitor process parameters such as pressure, flow, temperature, voltage, current, and vibration. Unless a facility is relatively new, it likely has analog panel meters; some

I’ve got some good news and some bad news. The good news is that, according to the U.S. Bureau of Labor Statistics, the number of occupational fatalities resulting from exposure to electricity has decreased steadily during the past 10 years (Figure 1). The bad news is that 141 people died on the job in the […]

Two of the most important elements in any construction or upgrade project are safety and speed of completion. While one way to increase safety is to eliminate hot work whenever possible, the reality is that welding is necessary for many tasks around a power plant. However, one area where welding may not always be required […]

Controlling combustion in fossil fuel power plants in order to control the emission of pollutants sometimes has adverse effects on plant equipment, including certain metals. To understand how to address the problem, it helps to understand how it develops. The emission of nitrogen oxides, generally referenced as NOx (NO or NO2), has several adverse effects […]

The electric power generation industry relies heavily on demineralized and deionized water during process operations. Managing the water supply is critical not only under normal operating conditions, but also during outages. When scheduled or unscheduled outages occur, many boiler and pre-boiler systems are drained. After the outage, they are refilled with water that has been […]