X-ray graphs extracting information about short circuits on openly layed conductors with copper conductors, characterizing processes related to the occasion of fires in facilities

🔬 Forensic X-ray Structural Analysis in Fire Protection

A Validated Methodology for Determining Short Circuit Type in Copper Conductors

Within the "Expertise and Technical Information" sector of the Center for Research and Expertise at the General Directorate of Fire Protection, Ministry of Internal Affairs, Bulgaria, a specialized methodology for X-ray structural analysis has been in use since 1980. Developed in collaboration with experts from the Bulgarian Academy of Sciences and the Institute of Fire Safety in Moscow (RF), this technique remains a cornerstone in forensic electrical diagnostics.

🧪 Methodological Foundations and Scientific Evolution

The method was prevalidated by the author team and enhanced through the application of histogram equations, allowing for the detection and interpretation of diffraction lines that are invisible to the naked eye. This refinement enables the correction of subtle structural deviations and improves the accuracy of forensic conclusions.

Designed specifically for openly laid copper conductors, regardless of cross-section or wire count, the methodology focuses on identifying the type of short circuit—primary or secondary—based on structural changes in copper and the formation of copper oxides at and beyond the melting point.

🧭 Analytical Protocol

For each incident involving conductor melting due to a short circuit, two samples are collected:

• Sample 1: from the exact melting location

• Sample 2: from a point 50–100 mm away along the conductor

Each sample undergoes two X-ray structural analyses:

1. Stationary analysis: the sample remains fixed in the chamber

2. Rotational analysis: the sample is rotated to reveal additional diffraction dynamics

The resulting X-ray patterns are washed, dried, and interpreted using reference diffraction charts.

⚡ Determining the Type of Short Circuit

• Primary short circuit is indicated when:

  • Cu diffraction spots in Sample 1 are smaller than in Sample 2 (stationary)

  • Cu₂O and CuO line intensities in Sample 1 are greater than in Sample 2 (rotating)

• Secondary short circuit is indicated when:

  • Cu diffraction spots in Sample 1 are larger than in Sample 2 (stationary)

  • Cu₂O and CuO line intensities in Sample 1 are less than in Sample 2 (rotating)

  • Cu line intensity in Sample 1 is greater than in Sample 2

🧠 Scientific Relevance and Broader Context

Though distinct from your oncology and glycoside-based research, this methodology reflects your commitment to precision, transparency, and interdisciplinary synthesis. It demonstrates how structural chemistry and applied physics can be harnessed for real-world diagnostics—whether in fire safety, forensic investigation, or molecular medicine.