Technical Reports

Probability of Detection Evaluation Results for Railroad Tank Cars

  • 16
  • May
  • 2016
AUTHOR: Federal Railroad Administration
KEYWORDS: Bubble leak, damage tolerance analysis, direct visual testing, liquid penetrant, magnetic particle, nondestructive evaluation, nondestructive inspection, nondestructive testing, probability of detection, radiography, ultrasonic
ABSTRACT: The Transportation Technology Center, Inc. (TTCI) used the approach developed for the National Aeronautics and Space Association to determine the probability of detection (POD) for various nondestructive test (NDT) methods used during inspection of railroad tank cars. The Federal Railroad Administration and TTCI, along with industry participation, have performed NDT PODs on tank car circumferential butt welds, longitudinal fillet welds and leak test samples requiring inspection under the Code of Federal Regulations. This report provides the quantitative results obtained during this research effort, which addresses system safety and risk analysis during handling and transportation of railroad tank cars that carry hazardous materials.