...Abstract A FAC (flow accelerated corrosion) test was performed for straight pipe composed of SA335 Gr P22 and SA106 Gr B (SA106-SA335-SA106) including a weld, as a function of the flow rate in the range of 7 to 12 m/s using the FAC demonstration test facility. Afterward, the experimental pipe...

.... This paper discusses the damage mechanisms that are still occurring and what concerns are still relevant today. One issue is that flow-accelerated corrosion is a much more prominent mechanism now than it was during the initial studies. Another is why deaerators operated for 60 years before they began to fail...

... Maintenance Long Term Asset Management Buried Pipe Raw Water Flow Accelerated Corrosion Aging Management INTRODUCTION Exelon ^† Generation presents an overview of corrosion, long-term asset integrity management needs, and strategies for an operating fleet of nuclear power plants, featuring...

... examination of failed samples, chemical analysis of weld metal and base metal, and chemical analysis of water samples. The results showed that flow accelerated corrosion (FAC) was clearly the responsible mechanism leading to the failures. Other mechanisms, including organic acid corrosion and erosion...

...Abstract Flow Accelerated Corrosion (FAC) has plagued the nuclear and fossil power industry with piping and components failures for more than 40 years. Two-phase FAC has been recognized since about 1970, while single phase FAC has been acknowledged since the mid-1980s. U.S. and international...

... piping systems. Cavitation erosion is a known degradation mechanism associated with piping systems but is not specifically monitored at Quad Cities unless it is within the scope of the Risk Informed Inservice Inspection (RI-ISI) program or the Flow Accelerated Corrosion (FAC) program. The 1B CS min flow...

...This paper focuses on selecting a protective coating for cast steel which is expected to service in the fast flow of seawater for heat exchanger purpose. The key properties of the candidate coating which may need to be considered are following: general corrosion flow accelerated corrosion...

...Abstract Carbon steel piping system of secondary side of power plant cooling systems experience severe flow accelerated corrosion (FAC) particularly at elbows where welding is done. Investigation of a number of ASTM A 106 small-bore carbon steel pipes received from a power plant indicates...

... of leaks and failures of piping systems within the refining industry. Left unchecked, damages can lead to early equipment replacement, unplanned outages, and, most importantly, incidents leading to injuries and property loss. FLOW ACCELERATED CORROSION (FAC) As water flows against carbon steel material...

... as a protective film. The major parameters ^{10 - 13} to determine FAC are divided into material parameters, flow dynamics parameters and environmental parameters, and they are shown in Figure 3 . Abstract Applicability and accuracy of a computer simulation code describing flow accelerated corrosion...

... to apply O₂ injection into the PWR feed water system to mitigate FAC, the optimal amount of O₂ should be injected while at the same time, O₂ feed into the steam generator is minimized. Abstract Systematic approaches for evaluating flow accelerated corrosion (FAC...

... implications for the use of the RCE to simulate flow accelerated corrosion in sweet production. This paper presents the results of an investigation to determine first, why the RCE results do not correlate to parallel pipe flow based on the calculated wall shear stress, and second, whether the conventional RCE...

...The ASTM B-571-97 standard bend test method [ 15 ] for metallic coatings was used to asses the adhesion of these coatings. Three flat substrates for each coating composition were bent to ensure reproducible results. Flow Accelerated Corrosion Abstract Over the past two decades, nanostructured...

... of the first few rows of tubes in the low pressure generating section due to a flow accelerated corrosion mechanism has been identified in a number of HRSG’s. This would appear to result from a boiler design issue in that the fluid flow rate in those tubes appears to be high enough to contribute to accelerated...

...The design and operating conditions of some HRSG systems may promote flow accelerated corrosion. For instance, some HRSG units contain low-pressure boiler sections that provide attemperation water and feedwater for intermediate and high-pressure boiler sections. Therefore, the water in the low...

...Abstract Flow accelerated corrosion, corrosion fatigue, and stress corrosion are the three most common failure mechanisms for HRSG boiler tubes and components. The causes of these failure mechanisms in HRSGs are discussed and examples of each mechanism provided. Challenges associated...

...INTRODUCTION Flow and Corrosion Flow accelerated corrosion is defined as corrosion resulting from the effect of turbulence due to the flow of a fluid that does not contain solid particles in sufficient concentration and/or size to impinge on the metal surface ( 1 ). Flow corrosion accelerated...

... as field experience, has demonstrated that alloyed steels are less susceptible. The most important alloy addition in this respect is chromium (see Figure 5 ). Abstract Flow accelerated corrosion has recently attracted attention in association with heat recovery steam generators. Apparently...