CN110376631B

CN110376631B - Novel dose detection method based on memory characteristics

Info

Publication number: CN110376631B
Application number: CN201910788765.9A
Authority: CN
Inventors: 李豫东; 张巍; 施炜雷; 郭�旗
Original assignee: Xinjiang Technical Institute of Physics and Chemistry of CAS
Current assignee: Xinjiang Technical Institute of Physics and Chemistry of CAS
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2023-04-21
Anticipated expiration: 2039-08-26
Also published as: CN110376631A

Abstract

The invention relates to a novel dose detection method based on memory characteristics, wherein a dose probe involved in the method consists of a processor, a memory matrix, a power chip, a power end and a serial port data end, when the novel dose detection method is used, the dose probe is placed in a radiation field, all ports are connected according to requirements, normal communication is ensured, a 50rad (Si)/s dose rate is adopted for a test, and the total dose detected by the dose probe divided by time is 51.6rad (Si)/s, so that the dose probe can meet the requirement of detecting dose information.

Description

Novel dose detection method based on memory characteristics

Technical Field

The invention relates to the technical field of dose detection in a radiation environment, and discloses a method for detecting radiation dose information in a nuclear radiation environment.

Background

In a nuclear power station, detection and detection of nuclear radiation are a vital ring, and are directly related to safe production and life health safety of staff, and currently, two methods of ionization chamber and scintillator detection are adopted as common dose detection modes. The scintillator dose detection method has a limited upper limit of dose rate and cannot be used in a radiation environment with high dose rate; the method for detecting the dose of the ionization chamber can detect the radiation environment with high dose rate, but the ionization chamber has the problem of temperature and air pressure correction, has technical difficulty, and has potential safety hazards due to the high voltage and high air pressure required by the operation of the ionization chamber.

Based on the above description, the invention is based on the radiation characteristics of the memory, and a digital dose detection method is adopted, so that the invention is applicable to the environment with high dose rate, and has the advantages of safety and low cost for detecting the dose information.

Disclosure of Invention

The invention aims to provide a method for detecting dosage information in a nuclear radiation environment, wherein a dosage probe related in the method consists of a processor, a memory matrix, a power chip, a power end and a serial port data end, when the method is used, the dosage probe is placed in a radiation field, all ports are connected according to requirements, communication is ensured to be normal, a dosage rate of 50rad (Si)/s is adopted for a test, the dosage rate is the dosage rate calibrated by using an ionization chamber, the ionization chamber detector is in a valid period, and data are real and reliable. The dose read by the invention is consistent with the detection result of the ionization chamber detector. Test results prove that the invention can be used for detecting radiation dose.

The invention relates to a novel dose detection method based on memory characteristics, wherein a dose probe related in the method consists of a processor (1), a memory matrix (2), a power chip (3), a power end (4) and a serial data end (5), wherein the processor (1) is connected with the memory matrix (2), the power chip (3) and the serial data end (5), the memory matrix (2) is connected with the power chip (3), the power chip (3) is connected with the power end (4), and the specific operation is carried out according to the following steps:

a. the power supply end (4) supplies 5V direct current voltage as a power supply to supply power to the power supply chip (3), and the power supply chip (3) respectively supplies power to the processor (1) and the memory matrix (2);

b. the power supply end (4) and the serial port data end (5) are connected according to the requirements, so that the connection is ensured to be error-free;

c. a command for starting dose detection is sent to the processor (1) through the serial port data end (5), and the dose probe starts working;

d. and reading data sent by the serial port data end (5) and ascertaining radiation dose information.

The invention discloses a method for detecting dose information in a nuclear radiation environment, which aims to detect the dose information in the nuclear radiation environment and achieves the purpose of detecting radiation dose by using the radiation characteristic of a memory.

It was found by irradiation experiments that a memory has a radiation characteristic: when the memory is irradiated with a certain dose, all stored information is turned to a high level, and through experiments, the memory can turn information bits to a high level after absorbing the same total dose at different dose rates. The memory is tested to flip the information bits after absorbing about 30krad (Si). And the memory is insensitive to radiation without power-up, and the radiation does not influence the memory.

For the phenomena described above, a memory matrix (2) is used to detect dose information. A memory matrix is provided with a plurality of memories, and each memory is controlled to be powered on and powered off by a relay. Controlling, by the processor (1), the memory matrix:

1. all memory information bits are set to low potential;

2. powering on a memory of the memory matrix (2) through the processor (1), recording time, and reading data of the memory in real time, when the data of the memory become high-potential, indicating that the dose probe has absorbed 30krad (Si) total dose, transmitting information absorbed 30krad (Si) and absorption time through a serial port data end, and dividing the total dose by the time to obtain the average dose rate in the time;

3. closing the memory, opening another memory, repeating the above steps, and detecting a new 30krad (Si);

drawings

FIG. 1 is a schematic view of a probe according to the present invention.

Detailed Description

Examples

The invention relates to a novel dose detection method based on memory characteristics, wherein a dose probe related in the method consists of a processor 1, a memory matrix 2, a power chip 3, a power end 4 and a serial data end 5, wherein the processor 1 is connected with the memory matrix 2, the power chip 3 and the serial data end 5, the memory matrix 2 is connected with the power chip 3, the power chip 3 is connected with the power end 4, and the specific operation is carried out according to the following steps:

a. the power supply end 4 supplies 5V direct current voltage as a power supply to supply power to the power supply chip 3, and the power supply chip 3 supplies power to the processor 1 and the memory matrix 2 respectively;

b. the power end 4 and the serial port data end 5 are connected according to the requirements, so that the connection is ensured to be error-free;

c. a command for starting dose detection is sent to the processor 1 through the serial port data end 5, and the dose probe starts working;

d. reading data sent by the serial port data terminal 5, and ascertaining radiation dose information;

1. total dose = 30 rad (Si), time = 613.6 seconds, average dose rate of 0-30 rad (Si) = 48.9rad (Si)/s

2. Total dose = 60 rad (Si), time = 623.1 seconds, average dose rate of 30-60 rad (Si) = 48.14rad (Si)/s

7. Total dose = 210 rad (Si), time = 592.7 seconds, average dose rate of 180-210 rad (Si) = 50.6rad (Si)/s

8. Total dose = 240 rad (Si), time = 607.3 seconds, 210-240 rad (Si) average dose rate = 49.4rad (Si)/s

9. Total dose = 270 rad (Si), time = 576.5 seconds, 240-270 rad (Si) average dose rate = 52.0rad (Si)/s

The test result shows that the method can meet the design requirement and can be used for detecting the dosage information in the nuclear environment.

Claims

1. The novel dose detection method based on the memory characteristics is characterized in that a dose probe involved in the method consists of a processor (1), a memory matrix (2), a power chip (3), a power end (4) and a serial data end (5), wherein the processor (1) is connected with the memory matrix (2), the power chip (3) and the serial data end (5), the memory matrix (2) is connected with the power chip (3), the power chip (3) is connected with the power end (4), and the specific operation is carried out according to the following steps:

c. the serial port data end (5) sends a command for starting dose detection to the processor (1), the dose probe starts to work, the memories in the memory matrix (2) can overturn information bits to high level after absorbing the same total dose under different dose rates, and the memories in the memory matrix (2) are insensitive to radiation and cannot influence the memories under the condition of no power-up;