The hottest monitoring data is refreshed once a se

The monitoring data is refreshed once a second, and three instruments strive to ensure the safety of Chengdu

visit the nuclear radiation monitoring point in Chengdu: No. 57 Yingtong Street

after the old house in the first row of Fuqin West Road, No. 57 Yingtong street, Sichuan radiation environment management and monitoring center station is here. On March 30, it was here that a very small amount of artificial radionuclide iodine-131 released from the Japanese nuclear accident was detected (it has been confirmed that its measurement will not affect the environment and public health, and no protective measures are required)

but in the eyes of the public, it is not known here, and its actions are also under the veil

yesterday, I walked into this monitoring point to uncover the whole process of nuclear radiation monitoring and glimpse the nuclear radiation detection system in Sichuan

equipment

three main instruments monitor the radiation amount in Chengdu

ability

can monitor the radiation amount of one ten thousandth of Becquerel

distribution

in addition to Chengdu station, there are 8 monitoring stations in the province, 9 monitoring stations in the province

bitmap

uncover 1

monitoring process

"when the data displayed on the computer deviates from the basic value, it means that radiation is monitored."

the "inspection"

Central Station in the "lookout" brother building on the top of the two brothers' building is itself the Chengdu monitoring point of Sichuan radiation environment management and monitoring center station. There are three "magic weapons" in the whole monitoring point - automatic radiation station, large flow aerosol sampler and high-purity germanium gamma spectrometer. "Whether we have nuclear radiation in Chengdu depends entirely on their detection." Chen Li, director of the radioactive testing room, told me

particle collection

large flow aerosol sampler is placed on the roof of the monitoring point together with the automatic radiation station, and there are 9 sets together. A filter membrane is attached to the sampler, on which the suspended solids in the air and the carried radiation particles will be adsorbed. After sufficient quantity, they will be taken to the center for internal analysis

radiation monitoring

automatic radiation station is also placed on the roof. It can capture the air at any time γ (gamma) radiation dose, "the nuclear radiation monitoring data will be refreshed once a second. As long as this value is within the natural background level, it indicates that there is no problem in Chengdu's environment. The so-called natural background level refers to the radiation dose of various natural rays, which is not harmful to human body." Chen Li said

high purity germanium gamma spectrometer is placed in the monitoring room downstairs. Unlike other equipment, its shape is more like a "barrel". After the samples are collected on the filter membrane of the sampler on the roof, the staff will box them and put them into this "bucket". After 10 hours, the content of radioactive substances in the sample can be detected

radiation identification

the high-purity germanium gamma spectrometer is connected to the computer, and the data about wind speed, wind direction, radiation amount and so on are constantly refreshed. "When the data displayed on the computer deviates from the basic value, it means that radiation is monitored."

however, whether it exceeds the standard or not, the staff will report the monitored data after overall planning

1 particle collection

large flow aerosol sampler is attached with a filter membrane, on which suspended solids in the air and carried radiation particles will be adsorbed

2 radiation monitoring

the automatic radiation station can capture the γ (gamma) rays until the cup-shaped radiation dose is rushed out

after the high-purity germanium gamma spectrometer collects samples on the filter membrane of the sampler, put them into this "bucket". After 10 hours, the content of radioactive substances in the sample can be detected

3 radiation identification

the high purity germanium gamma spectrometer is connected to the computer. When the computer displays the position where the data deviates from the basic value, it means that the radiation is monitored

uncover secrets 2

this software also has the copy function

their

monitoring station is still in an emergency state, and the data is reported every three hours

at noon yesterday, 19 staff in the monitoring room surrounded the office, eating a simple lunch box. They are still in a "state of emergency". "After the earthquake in Japan, we immediately set up a nuclear radiation emergency team. So far, the staff has not had a day off. Although all monitoring data now show normal, as long as the nuclear radiation crisis in Japan is not over, our strings must be tightened." Chen Li said that the issue of nuclear radiation concerns the general public. "We should monitor and analyze the reported data most truly and objectively."

this time, the monitoring density is unprecedented

in the past, they reported the monitoring data to the Ministry of environmental protection once a month. At present, they report the monitoring data to the superior every three hours, day and night

at ordinary times, there is only one machine of each kind. Because of this emergency, the standby equipment has been used. "We have all started this emergency state after the Wenchuan earthquake and the huge mudslide last year." Chen Li said

dongxiaohui, the head of Sichuan radiation environmental management and monitoring center, said that the monitoring capacity of Sichuan Environmental Protection Department is at the forefront of domestic provincial environmental protection departments, and it can monitor the radiation amount of 1/10000 Becquerel (the international unit of radioactivity). Please rest assured

uncover secrets 3

distribution

there are 9 monitoring stations in the province, 8 secondary cities and Chengdu

there is only one monitoring station in Chengdu, which is responsible for monitoring the radiation environment of the whole city

in addition, the province also has monitoring stations in Mianyang, Guangyuan, Leshan, Panzhihua, Nanchong, Yibin, Guang'an and Suining. The data monitored by these eight monitoring stations will be returned to the provincial radiation environmental management and monitoring center station at any time. However, after careful inspection, the staff can pay attention to the radiation status of secondary cities through the computer. Once the computer shows abnormalities, the staff of the provincial monitoring room will immediately rush to the scene to analyze the local air, soil and other elements. "Basically, half of a month is spent in secondary cities for sampling and analysis." Radioactive monitoring room staff Wang hybrid long fiber reinforced composite mechanical properties reached the best balance bright introduction

after purchasing the samples on the filter paper of the sampler in secondary cities, they will also be sent to the province for sample analysis. "But in the recent special period, we will not wait for secondary cities to send samples, so the timeliness is too poor. We are all our own staff to get samples everywhere." Chen Li introduced

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