Planning and decommissioning of a disused Theratron- 780 teletherapy machine and the dose assessment methodology for normal and radiological emergency conditions

Planning and decommissioning of a disused Theratron- 780 teletherapy machine and the dose assessment methodology for normal and radiological emergency conditions

The present work represents a technical guideline for decommissioning a disused teletherapy machine model Theratron-780 and contains category one 60Co radioactive source. The first section predicts the dose rate from the source in case of normal and radiological emergency situations via FLUKA-MC sim...

Full description

Saved in:
Bibliographic Details
Published in:Nuclear engineering and technology Vol. 55; no. 1; pp. 238 - 247
Main Authors: Breky, Mohamed M.Elsayed, Mansy, Muhammad S., El-Sadek, A.A., Mousa, Yousif M., Mohamed, Yasser T.
Format: Journal Article
Language:English
Published: Elsevier B.V 01-01-2023
Elsevier
한국원자력학회
Subjects:
60Co
Decommissioning
Disused radioactive sources
Radiological accidents
Sealed source
Teletherapy
Theratron-780
원자력공학
Decommissioning
Teletherapy
Radiological accidents
Disused radioactive sources
Theratron-780
Sealed source
60Co
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The present work represents a technical guideline for decommissioning a disused teletherapy machine model Theratron-780 and contains category one 60Co radioactive source. The first section predicts the dose rate from the source in case of normal and radiological emergency situations via FLUKA-MC simulation code. Moreover, the dose assessment for the occupational during the whole process is calculated and compared to the measured values. A suggested cordoned area for safety and security in a radiological emergency is simulated. The second section lists the whole process's technical procedures, including (preview, dismantle, securing, transport and storage) of the disused teletherapy machine. Results show that the maximum obtained accumulated dose for occupational were found to be 24.5 ± 4.9 μSv in the dismantle and securing process in addition to 3.5 ± 1.8 μSv during loading on the transport vehicle and unloading at the storage facility. It was found that the measured accumulated dose for workers is in good agreement with the estimated one by uncertainty not exceeding 5% in normal operating conditions.
ISSN:1738-5733
2234-358X
DOI:10.1016/j.net.2022.08.023