Requirements and methods for radiation level monitoring in the workplace and surrounding environment of accelerator industrial CT

 

I. Introduction

 

Accelerator industrial Computed Tomography (CT) is a kind of non-destructive detection technology using high-energy particle beams, which is widely used in industrial nondestructive testing, material science, medicine and other fields. However, the radiation of high-energy particle beams has certain potential harm to human body and environment. Therefore, the monitoring of radiation levels in the accelerator industrial CT workplace and its surrounding environment is an important measure to ensure the safety of workers and the public and protect the environment. This paper will discuss in detail the requirements and methods of radiation level monitoring in the workplace of CT in accelerator industry and its surrounding environment.

Second, accelerator industrial CT workplace radiation level monitoring requirements

 

Monitoring purpose

The monitoring of radiation levels in the workplace of Accelerator Industrial CT is designed to ensure that the radiation dose received by workers during operation does not exceed the relevant national standards and regulations, while protecting equipment from radiation damage.

 

Monitoring range

The monitoring scope should include critical areas such as accelerator industrial CT equipment, operating stations, test workpiece loading and unloading areas, personnel passageways, control rooms, and the environment surrounding these areas.

 

Monitoring equipment

An appropriate X and gamma radiation dosimeter, as well as a circumneutron dose equivalent (rate) meter (when the accelerator energy is greater than 10MeV), should be equipped. These monitoring equipment should meet the relevant national standards and regulations, and be verified or calibrated by legal units.

Monitoring method

(1) Fixed-point monitoring: Fixed dose monitoring devices are set up at key locations such as accelerator industrial CT equipment, operation table, and test workpiece loading and unloading area to monitor radiation dose in real time.

(2) Inspection and monitoring: The portable radiation dosimeter is used to conduct regular inspection of the accelerator industrial CT workplace to ensure that the radiation level in each area meets the safety requirements.

(3) Continuous monitoring: Continuous monitoring equipment is set up in key areas such as the control room to monitor changes in radiation levels in real time.

 

Monitoring record

A sound radiation level monitoring and recording system should be established to record the time, place, monitoring results and other information of each monitoring for traceability and inquiry.

 

Requirements and methods for monitoring radiation levels in the environment surrounding the workplace of CT in accelerator industry

 

Monitoring purpose

The monitoring of radiation levels in the surrounding environment of the Accelerator Industrial CT workplace is designed to ensure that the radiation impact on the surrounding environment does not exceed the relevant national standards and regulations, protecting the safety of the public and the environment.

 

Monitoring range

The monitoring scope should include the environment within a certain range around the accelerator industrial CT workplace, such as buildings, roads, green Spaces, etc.

 

Monitoring equipment

Portable radiation dosimeter and other equipment should be equipped to monitor the radiation level of the surrounding environment. These devices should meet the relevant national standards and regulations, and have been verified or calibrated by legal units.

 

Monitoring method

(1) Grid spot monitoring: Within a certain range around the accelerator industrial CT workplace, monitoring points are set up in accordance with the grid pattern, and portable radiation dosimeter is used to monitor one by one.

(2) Regular inspection and monitoring: Regular inspection and monitoring of the surrounding environment of the accelerator industrial CT workplace to ensure that the radiation impact on the surrounding environment meets the safety requirements.

 

Monitoring record

Also, a sound monitoring and recording system for ambient radiation levels should be established to record the time, place, monitoring results and other information of each monitoring for traceability and inquiry.

 

Iv. Evaluation and processing of radiation level monitoring results

 

Evaluation method

According to the monitoring results, combined with the relevant national standards and regulations, the radiation level of the accelerator industrial CT workplace and its surrounding environment is evaluated. The assessment should determine whether radiation levels in each area meet safety requirements and whether further protective measures are required.

Treatment measure

(1) For areas where the radiation level exceeds the safety requirements, relevant operations should be immediately stopped and effective protective measures should be taken, such as setting protective barriers and restricting personnel entry.

(2) For areas where the radiation level is close to the safe limit, monitoring and management should be strengthened to ensure that the radiation level is always within the safe range.

(3) For areas where radiation levels meet safety requirements, normal operations can continue, but it is still necessary to remain vigilant and regularly monitor and evaluate.

 

V. Summary and suggestions

 

The monitoring of radiation levels in the workplace and surrounding environment of Accelerator Industrial CT is an important measure to ensure the safety of workers and the public and protect the environment. Through the formulation of strict monitoring requirements and methods, the establishment of a sound monitoring record system, and the adoption of effective measures, radiation safety problems can be found and solved in time to ensure the healthy development of accelerator industry CT technology. At the same time, it is recommended to strengthen radiation safety publicity and education, and improve the awareness and prevention awareness of radiation hazards among workers and the public.