Combustible Dust Testing

Laboratory testing to quantify dust explosion and reactivity hazards

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Gas and Vapor

Laboratory testing to quantify explosion hazards for vapor and gas mixtures

Classification of hazardous materials subject to shipping and storage regulations
Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen
Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Thermal Stability

Safe storage or processing requires an understanding of the possible hazards associated with sensitivity to variations in temperature

Adiabatic Calorimetry
Data demonstrate the consequences of process upsets, such as failed equipment or improper procedures, and guide mitigation strategies including Emergency Relief System (ERS) design
Reaction Calorimetry
Data yield heat and gas removal requirements to control the desired process chemistry
Battery Safety

Testing to support safe design of batteries and electrical power backup facilities particularly to satisfy UL9540a ed.4

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Cable Testing
Evaluate electrical cables to demonstrate reliability and identify defects or degradation
Equipment Qualification (EQ)
Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions
Water Hammer
Analysis and testing to identify and prevent unwanted hydraulic pressure transients in process piping
Acoustic Vibration
Identify and eliminate potential sources of unwanted vibration in piping and structural systems
Gas & Air Intrusion
Analysis and testing to identify and prevent intrusion of gas or air in piping systems
ISO/IEC 17025:2017

Fauske & Associates fulfills the requirements of ISO/IEC 17025:2017 in the field of Testing

ISO 9001:2015
Fauske & Associates fulfills the requirements of ISO 9001:2015
Dust Hazards Analysis
Evaluate your process to identify combustible dust hazards and perform dust explosion testing
On-Site Risk Management
On-site safety studies can help identify explosibility and chemical reaction hazards so that appropriate testing, simulations, or calculations are identified to support safe scale up
DIERS Methodology
Design emergency pressure relief systems to mitigate the consequences of unwanted chemical reactivity and account for two-phase flow using the right tools and methods
Deflagrations (Dust/Vapor/Gas)

Properly size pressure relief vents to protect your processes from dust, vapor, and gas explosions

Effluent Handling

Pressure relief sizing is just the first step and it is critical to safely handle the effluent discharge from an overpressure event

FATE™ & Facility Modeling

FATE (Facility Flow, Aerosol, Thermal, and Explosion) is a flexible, fast-running code developed and maintained by Fauske and Associates under an ASME NQA-1 compliant QA program.

Mechanical, Piping, and Electrical
Engineering and testing to support safe plant operations and develop solutions to problems in heat transfer, fluid, flow, and electric power systems
Hydrogen Safety
Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen
Thermal Hydraulics
Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions
Nuclear Safety
Our Nuclear Services Group is recognized for comprehensive evaluations to help commercial nuclear power plants operate efficiently and stay compliant
Radioactive Waste
Safety analysis to underpin decomissioning process at facilities which have produced or used radioactive nuclear materials
Adiabatic Safety Calorimeters (ARSST and VSP2)

Low thermal inertial adiabatic calorimeters specially designed to provide directly scalable data that are critical to safe process design

Other Lab Equipment and Parts for the DSC/ARC/ARSST/VSP2 Calorimeters

Products and equipment for the process safety or process development laboratory


Software for emergency relief system design to ensure safe processing of reactive chemicals, including consideration of two-phase flow and runaway chemical reactions


Facility modeling software mechanistically tracks transport of heat, gasses, vapors, and aerosols for safety analysis of multi-room facilities


Our highly experienced team keeps you up-to-date on the latest process safety developments.

Process Safety Newsletter

Stay informed with our quarterly Process Safety Newsletters sharing topical articles and practical advice.


With over 40 years of industry expertise, we have a wealth of process safety knowledge to share.

Recent Posts

Nuclear Power Plant Seismic Verification of Piping Systems

Posted by Fauske & Associates on 12.12.13

By Jens Conzen, Manager, Structural Services & Vibration, Fauske & Associates, LLC

Recent and past earthquakes have shown that power plants and other engineering processPiping facilities can suffer damage from seismic excitation.  If damage occurs, it is often due to insufficient seismic design and anchorage.  For new plant components, conservative seismic design analyses are commonly performed such as finite element modeling.  For older plants, this was often not required, thus, most seismic vulnerabilities are typically identified in the existing fleet of nuclear power plants.

Fauske & Associates, LLC (FAI) recently developed a seismic evaluation method for piping systems that was specifically developed for a nuclear power utility.  It should be noted that not every component in a nuclear power plant needs to be seismically qualified.  Only those items that are designated essential for safe shut down and subsequent decay heat removal need seismic qualification.

Since the 2011 earthquake in Japan, engineers and power utilities pay closer attention to seismic design.  In particular, components required for long term coping for loss of AC power scenarios are reviewed.  It is also a requirement for the US and European power utilities to review their seismic plant analysis in response to the NTTF 2.3 Seismic letter and the European Union stress test, respectively.  Consequently, seismic evaluation tools that have been developed several years ago are now being brought back to evaluate seismic capacity versus demand or to assess seismic margin.  These tools can be used to perform an in-situ seismic evaluation of equipment.  However, a time efficient assessment is often difficult due to the formality of these approaches. 

Earthquake experience has shown that piping systems may undergo damage (or fail to deliver flow) if they are not designed for seismic loads.  Further, the Fukushima accident has shown the importance of redundancy in piping systems.  Intact piping can assure the delivery of service- or fire water that can be used for spent fuel cooling, for example.  Hence, it would be beneficial if redundant options could be identified by a rather simple approach.  FAI found out by conducting research and by evaluating seismic experience data that piping systems that are built according to general industrial standards may be rugged enough to cope with a design basis earthquake.  

As a result, FAI has developed the FAI Screening Methodology for the Seismic Robustness of Installed Piping Systems that can be used to establish confidence in the seismic capacity of installed piping systems.  The methodology has been applied at a nuclear power plant site to investigate the possibility to refill the on-site fire water storage tanks following a seismic event.  The methodology encompasses supported pipe, buried pipe, valves, pumps and tanks.  It is designed in a simple way so that an experienced engineer can use the method to perform conservative walkdown screening assessments of the seismic adequacy of the piping system.  The walkdown screening also provides the benefit of a comprehensive as-built documentation of the piping system.

A case example was recently presented at the Nordic Nuclear Symposium, receiving attention industry wide:

  • Motivation - Investigation of the possibility to use existing piping to refill the fire water storage tanks from the on-site fresh water reservoir following a seismic event at a nuclear utility site.
  • Objective - Perform a conservative assessment of the seismic adequacy of the piping system by using the FAI seismic evaluation method.
  • Basis for Screening Criteria 
    • Supported Pipe - ASME B31.1-2001, ASME Code - Power Piping
    •                         - Piping/Seismic Handbooks (screening tables)
    • Valves, Pumps and Tanks - GIP for Seismic Verification of Nuclear Plant Equipment by SQUG
    • Buried Pipe - ASCE Guideline for Water Transmission Facilities
    •                   - EPRI Guideline for Buried Pipe
    •                   - NEI Guideline for Underground Piping and Tank Integrity
    •                   - NUREG-1801 Aging Lessons Learned
    • Tanks - NEI Guideline for Underground Piping and Tank Integrity
    •           - NUREG-1801 Aging Lessons Learned
    •           - ACI Guideline for Concrete Structures
    • All - General Research Publications
  • Methodology - The screens shall establish confidence that the system can deliver flow and remains leak tightFeatures of a section that fail to pass a screening item are considered outliers.  Outliers require resolution to assure seismic adequacy of the system.
  • Outline of Supported Pipe Screens
    • Construction Quality 
    • Pipe Degradation – External/Internal 
    • Span Between Vertical and Horizontal Supports 
    • Pipe Support Capacity
    • Anchor Motion (differential displacement between buildings, for example)
    • Joint Capacity 
    • Valve Capacity 
    • Seismic Interaction Concerns (proximity effects e.g. falling of nearby structures) 
  • Outline of Buried Pipe Screens
    • Pipe Diameter 
    • Pipe Material 
    • Pipe Degradation and Corrosion Protection 
    • Joint Capacity 
    • Soil Category 
    • Soil Uniformity and Backfill Adequacy 
    • Buried Depth 
    • Buried Age


A conservative screening methodology has been developed by FAIand was successfully applied at a nuclear power utility. The results provided confidence in the seismic adequacy of the examined piping system. In addition, areas for improvement were identified and the evaluation report can serve as a basis for structural modifications.

For more information regarding seismic engineering, pipe systems and other nuclear safety needs contact us at


Topics: Nuclear


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