Three nuclear radiation monitoring instruments to protect Chengdu's safety

After a row of old houses on Fuqin West Road, No. 57 Yingtong Street, Sichuan Radiation Environmental Management Monitoring Center Station is here. On March 30th, it was here that a very small amount of artificial radionuclides released from Japan's nuclear accidents detected iodine-131 (it has been confirmed that its measurement will have no impact on the environment and public health, and no protective measures need to be taken). But in the eyes of the public, it is not known and its actions are under the veil.

On April 1, the reporter walked into this monitoring site, revealed the entire process of nuclear radiation monitoring, and looked at the nuclear radiation detection system in Sichuan.

Equipment: Three major instruments to monitor Chengdu's radiation capacity: One thousand ten thousandth of radiation can be monitored. Distribution: In addition to Chengdu station, there are eight monitoring stations in the province. There are nine monitoring stations in the province. Secret 1: Surveillance process - "When the data on the computer shows a deviation from the basic value, it means that radiation has been detected."

Two brothers on top of the building "look at the wind" in a brother building "inspection"

The central station itself is the Chengdu monitoring point of the Sichuan Radiation Environmental Management Monitoring Center Station. The entire monitoring site has a total of 3 "magic weapons" - radiation automatic stations, high-flow aerosol samplers, and high-purity gamma gamma spectrometers. “We have no nuclear radiation in Chengdu and we rely on them for detection.” Chen Li, director of the radiological testing department, told reporters.

The particle collection high-flow aerosol sampler is placed together with the radiation automation station on the roof of the monitoring point, and the two are totaled to nine. A filter is attached to the sampler. Suspended matter in the air and radioactive particles carried by it will be adsorbed on it. After a sufficient number of samples, it will be analyzed by the center.

Radiation monitoring radiation automatic stations are also placed on the roof. The radiation dose of γ (gamma) radiation in the air can be captured at any time. “Nuclear radiation monitoring data is refreshed once every second. As long as this value is within the natural background level, it shows that Chengdu’s environment is no problem. The so-called natural background The level refers to the radiation dose of various natural radiations, which has no harm to the human body, Chen Li said.

High-purity germanium gamma spectrometer placed in the downstairs monitoring room, unlike other equipment, its appearance is more like a "bucket." After samples were collected on the roof of the sampler filter, the staff packed them and placed them in the “bucket”. After 10 hours, the radioactive material content in the sample can be detected.

The radiation identified the high-purity gamma gamma spectrometer connected to the computer. The data such as the wind speed, wind direction, and radiation amount was continuously updated. “When the computer shows the position where the data deviates from the basic value, it means that the radiation is monitored.” However, No, staff will report the monitored data in an integrated manner.

1 Particle Collection A large-flow aerosol sampler has a filter attached to it. Suspended matter in the air and radioactive particles carried by it are adsorbed on it.

2 Radiation monitoring The radiation automatic station can capture the radiation dose of γ (gamma) radiation in the air at any time. After the high-purity helium gamma spectrometer collects the sample on the sampler filter, it places this “bucket”. After 10 hours, the radioactive material content in the sample can be detected.