Becht Nuclear Services recently applied ANSYS® multi-surface, with fluid-structure interaction (FSI) capabilities to evaluate the effects of seismic loading on vessel internals that are immersed in the fluid. Before proceeding with the analysis of the actual vessel, the FSI capabilities were benchmarked to an analytical solution of a simpler liquid-filled flexible tank under seismic loading. […]
Overview Fluid Catalytic Cracking (FCC) units were first developed in the 1930s. Over the years this technology has evolved and it is one of the most important processes used in refineries. The FCC units are used to convert high boiling point, high molecular weight hydrocarbon fractions of crude oils to gasoline, olefinic gases, and other products. […]
My previous blog on Equipment Health Monitoring (EHM) explains why EHM can be used to improve fatigue life of a coke drums. As explained in this blog, one of the critical locations to be monitored are the circumferential weld seams – where high thermal stresses occur during the operation of the drum. These high stresses over […]
Description Process vessels such as towers, drums and heat exchangers may be exposed to low temperatures as a part of normal operation or as the result of an upset condition. Carbon and low alloy steels typically used in process vessels undergo a transition from ductile to brittle behavior as temperature is reduced and are at […]
Becht Engineering, Nuclear Services Division, has completed a finite-element numerical study of two proposed Code Cases for ASME III Division 1 Subsection NH, Class 1 Components in Elevated Temperature Service. They are: “Satisfaction of Strain limits for Class 1 Components at Elevated Temperature Service Using Elastic-Perfectly Plastic Analysis” and “Calculation of Creep-Fatigue for Class […]
So, you think you know what load case combinations to use for your ASME Section VIII, Division 2, Part 5 analysis to satisfy Protection Against? Common sense says to follow to Code rules in Table 5.3 – but do you fully understand what that means? And, what loads should you use to satisfy Protection […]
Unloading of spent nuclear fuel at nuclear utilities typically involves removing spent fuel from the spent fuel pool and placing it in casks for interim on-site storage. During unloading, some utilities use what is known as a “stacked cask” configuration in which a transfer cask is temporarily stacked on top of a storage cask as […]
