September 26, 2019

Combating Condensation at the National Air and Space Museum

By: Brian Rose, Richard Renaud

This article discusses the condensation analysis and CFD modeling that SGH performed for the ongoing revitalization project at the National Air and Space Museum.

It is ...

September 26, 2019

Energy, Hygrothermal, and Freeze-Thaw Considerations for Insulating Mass Masonry Walls

This paper discusses energy modeling and previous research regarding freeze-thaw masonry deterioration to challenge common assumptions about the benefits and risks of insulating masonry walls.

It is...

September 13, 2019

Equipment Capacities from Earthquake Experience Data for Use in Fragility Calculations

Electric Power Research Institute (EPRI) has recently researched the development of refined equipment capacities from earthquake experience data for use in fragility calculations, which is a key component of nuclear seismic probabilistic risk...

September 13, 2019

Risk-Consistent Vertical Ground Motion Spectra for Seismic Probabilistic Risk Assessment

Seismic Probabilistic Risk Assessment (SPRA) of nuclear power plants (NPPs) is typically performed using three major analysis components: probabilistic seismic hazard, seismic fragility, and plant response analyses. The seismic hazard output is...

September 13, 2019

Case Study Investigating Probabilistic and Deterministic Sampling Methods for Developing In-Structure Response Spectra: Phase II

The goal of this ongoing, multi-phase research project is to assess the accuracy of simplified deterministic sampling methods used in practice to estimate seismic structural response compared to more rigorous probabilistic sampling approaches....

September 13, 2019

A Probabilistic Assessment of PWR SNF Rod Pinching Failure Considering Hydride-Related Cladding Embrittlement

By: Ricardo Medina, Elmar Eidelpes, Luis F. Ibarra

A probabilistic assessment of the likelihood of PWR SNF rod failure considering hydride-related cladding embrittlement after dry storage cool-down of 300 years is presented. The investigated rod failure mechanism is cladding cracking caused by...

September 13, 2019

Numerical Simulation of a Transportation Cask and Transmissibility due to 0.3 M Drop

By: Ricardo Medina, Shokoufeh Zargar, Luis F. Ibarra

In the absence of experimental and measured data, a reliable numerical model is needed to predict the performance of fuel assemblies after extended storage, including acceleration and strain of fuel rods due to impact and vibration, and quantify...

Markets:Nuclear
September 13, 2019

Partial Correlation and Dependence Between Seismic Fragilities of Multiple Adjacent Structures with Significant Soil-Structure-Interaction Effects

By: Mohamed Talaat, Robert P. Kennedy

Seismic Probabilistic Risk Assessment (SPRA) of nuclear power plants (NPPs) is typically performed using three major analysis components: probabilistic seismic hazard, seismic fragility, and plant response. The fragility analysis develops...

September 13, 2019

Case Study: Cable Tray Seismic Fragility Evaluation Involving Ductile Failure of a Cold-Formed Steel Section in Flexure

This paper presents a case study for a recent seismic fragility evaluation of cable trays at a nuclear power plant in the United States. The evaluation was initiated due to the presence of non-serrated strut nuts in cable tray supports throughout...

Markets:Nuclear
September 13, 2019

Reinforced Concrete Shear Wall Capacity Advances

Seismic PRAs have become more common in the nuclear power industry following the Fukushima accident caused by the 2011 earthquake and tsunami. In order to provide best estimates of the risk, the seismic fragilities should be as realistic as...

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