O&M

Studies and surveys have predicted a future shortage of skilled workers in the power industry for many years. Unfortunately, the future is here. When qualified workers are difficult to locate, some companies are finding that technology and service contracts allow them to do more with less. It’s no secret that the traditional power industry workforce […]

Wind turbine blades, gearboxes, and generators get most of the attention both within and beyond the power industry. The focus is often on increased capacity and blade lengths, as well as drive train premature failures. That’s natural, because those rotating blades are the most visible part of a wind project. However, successful operation of a […]

In order to comply with the Clean Air Act and subsequent regulations covering emissions, coal-fired utilities have installed multiple pollution control devices. Understanding key operating aspects of this equipment can help you avoid costly maintenance activities and forced shutdowns. Since the passage of the Clean Air Act in 1970, the regulatory environment for control of […]

When the decision is made to retire a power plant, the work of getting there is just beginning. Maintaining safe and reliable generation requires strong leadership, clear communications, and heightened attention to operations and maintenance, staff morale, and post-shutdown plans.   For utilities and other generators facing the challenge of winding down operations at an […]

Minimizing the impact of electrical fires in power plants requires a combination of prevention, compartmentalization, detection, and suppression strategies. But first, everyone in a plant needs to understand the hazard. Fires at electric generating stations are rare—but not as rare as one might think. Loss history at hydroelectric facilities, for example, shows that fires involving […]

A facility’s steam turbine ranks at, or at least near, the top of the list of vital power plant equipment. Without it, the thermal energy in pressurized steam can not be converted to rotary motion, which is

It’s no surprise that the Palo Verde Nuclear Generating Station led the nation in electrical generation in 2014—it has done that for 23 consecutive years—but with a total output of 32.3 million MWh, it even bested its own previous record set in 2012. The Palo Verde plant is located about 45 miles west of Phoenix, […]

Nuclear power station water storage tanks, located above ground or underground, are constructed of aluminum, stainless steel, or carbon steel. All have naturally occurring electro-chemical processes that can eventually deteriorate the metal, resulting in leaks. Defects that develop on the underside of tank floors are particularly difficult to detect and measure. The Nuclear Energy Institute […]

The Occupational Safety and Health Administration requires certain incidents to be recorded and reported, which generates a set of statistics that many companies use to gauge safety performance. However, other metrics may be better predictors. The Occupational Safety and Health Administration (OSHA) requires all employers with more than 10 employees, and whose establishments are not […]

An increasing supply of low-cost higher-chlorine coal is prompting many U.S. generators to give the fuel serious consideration in spite of its reputation for causing corrosion. Though corrosion can be a consideration, it’s not always caused simply by the fuel switch. Understanding the various chemical interactions, as well as operational and emissions pros and cons, […]

Proposed U.S. standards for reducing carbon emissions from existing coal-fired power plants rely heavily upon generation-side efficiency improvements. Fuel, operations, and plant design all affect the overall efficiency of a plant, as well as its carbon emissions. This review of the fundamentals of coal plant efficiency, frequent problems that reduce efficiency, and some solutions for […]

In mid-November, members of the POWER Generating Company Advisory Team responded via email to the following set of questions. Their comments have been edited for style. POWER: What changes in your fleet’s

Back in the “good old days” of the power industry, fuel was cheap, fuel supplies were fairly constant, air emissions regulations were loose, and power plant coffee was as dark as sin and worse for you

Water and energy are intimately linked. Water is necessary for the production, distribution, and use of energy. Energy is needed for the withdrawal and delivery of water. The two are inseparable. Several

Many utilities around the world have been discovering abnormal or aberrant P91 base and weld metal microstructures in their plants, leading to, or with a potential to lead to, early cracking and failure in

Over the past few years, wind generation projects have become prominent features of the North American landscape and of the utility infrastructure. In spite of their variable production load onto the grid

In recent years several EPRI projects have explored different aspects of heat rate improvements. This article, following Part 1 in the November 2014 issue of POWER , reviews results of implementing heat rate

Material-handling systems at coal-fired power plants operate nearly continuously in harsh conditions for decades. Temperatures, moisture, overload conditions, and collisions from equipment can take a toll on

If you’re the person tasked with controlling the level of fly ash in collection hoppers, you know how difficult the application can be. What at first looks like a simple measurement quickly proves to be much more demanding in actual execution. The first problem is the environment inside the collection hoppers, which is extremely challenging […]

Too-frequent sootblowing can damage boiler components and place a big load on plant efficiency, but not enough of it can be just as big a problem. A sootblowing optimization system can help you find the “sweet spot.” With the increasing demands placed on today’s coal-fired power plants worldwide, operators are continuously looking for the best […]

Even without regulatory considerations, there are good reasons for virtually every coal-fired power plant to improve its heat rate. The Electric Power Research Institute (EPRI) has looked at dozens of methods for improving heat rates and evaluated their applicability and costs. Part 1 of this two-part series explains the basics of heat rate improvements and […]

What do a power plant, a hospital, a police station, and a remote mine have in common? They all have essential assets requiring uninterruptible power, commonly powered by an engine generator as primary or backup power. Engine generators, often termed “gensets,” combine an electrical generator and an engine. They supply electrical power where normal utility […]

Plant engineers at Eskom’s Majuba Power Station in South Africa have been continuously looking for ways to improve efficiency and reliability. The six-unit, 4,000-MW, supercritical coal-fired plant was experiencing an efficiency decrease of 5% to 7%, which plant engineers determined was caused by poor performance of the actuators on their condensate level control valves (CLCVs). […]

Cold temperatures are nothing new, but extreme winter weather has been in the headlines more and more in recent years. Many of us had never heard the term “polar vortex” before last winter, but earlier

A sustained Arctic blast composed of freezing rain, record snowfalls, and high winds hit 22 states, from Mexico to New England in early February 2011. The extreme weather severely affected the power generation

During the Jan. 3–12, 2014, polar vortex that brought record-setting cold temperatures and severe winter weather to much of the U.S., nuclear plants not only survived, but thrived. According to the Nuclear

Twice this year, PJM flirted with blackouts when brutal winter storms (dubbed a polar vortex) struck the Eastern U.S. in January. The cold weather set a new winter peak demand record of 141,500 MW on Jan. 7

The upcoming implementation of the Environmental Protection Agency’s (EPA’s) Mercury and Air Toxics Standards (MATS) is putting pressure on coal-fired power plants to develop and implement compliance

Although industrial lubricants typically account for only 1% of plant operational costs (Figure 1), the lack of proper lubrication products, techniques, or applications can have a much more severe effect on

With Units 6 and 7 back in operation, Colorado Springs Utilities (CSU) has restored 80% of the generation capacity at its Martin Drake Power Plant located in downtown Colorado Springs. The plant was taken offline after sustaining significant damage during a May 5 fire. Most of the damage occurred in the area surrounding Unit 5, […]