Dose mapping using MCNP code and experiment for SVST-Co-60/B irradiator in Vietnam

Area of Science:

• Radiation dosimetry
• Nuclear engineering
• Medical physics

Background:

• Accurate absorbed dose distribution is critical for effective radiation processing.
• Cobalt-60 irradiators are widely used in various industrial and medical applications.
• Understanding dose uniformity is essential for optimizing irradiation processes.

Purpose of the Study:

• To simulate and measure the absorbed dose distribution within a tote-box of a Cobalt-60 irradiator (SVST-Co60/B).
• To evaluate the Dose Uniformity Ratio (DUR) and identify dose extremes.
• To assess the irradiator's efficiency with varying dummy densities.

Main Methods:

• Utilized MCNP code for Monte Carlo simulations of radiation transport.
• Employed ethanol-chlorobenzene (ECB) dosimeters for experimental measurements.
• Compared simulation results with experimental data to validate the model.

Main Results:

• Achieved good agreement between MCNP simulations and ECB dosimeter measurements.
• Determined the absorbed dose distribution, DUR, and extreme dose values within the tote-box.
• Gained insights into the irradiator's efficiency as a function of dummy material density.

Conclusions:

• The MCNP code and ECB dosimeters provide a reliable method for assessing absorbed dose distribution.
• The study offers valuable data for optimizing the operation of the SVST-Co60/B Cobalt-60 irradiator.
• Findings contribute to improving dose uniformity and process efficiency in radiation applications.