Invisible radiation, visible responsibility
At 1:23 a.m. on April 26, 1986, residents of Pripyat in northern Ukraine were awakened by a loud noise. Reactor No. 4 of the Chernobyl Nuclear Power Plant exploded, and 50 tons of nuclear fuel evaporated instantly, releasing 400 times the radiation of the Hiroshima atomic bomb. The operators working at the nuclear power plant and the first firefighters who arrived were exposed to 30,000 roentgens of deadly radiation per hour without any protection - and 400 roentgens absorbed by the human body is enough to be fatal.
This disaster kicked off the most tragic nuclear accident in human history. 28 firefighters died of acute radiation sickness in the following three months. They died in extreme pain with black skin, oral ulcers, and hair loss. 36 hours after the accident, 130,000 residents were forced to evacuate their homes.
25 years later, on March 11, 2011, the core of the Fukushima Daiichi Nuclear Power Plant in Japan melted down in the tsunami caused by the earthquake. A 14-meter-high wave broke the seawall, and three reactors exploded one after another, and 180 trillion becquerels of radioactive cesium 137 instantly poured into the Pacific Ocean. To this day, the nuclear power plant still stores more than 1.2 million cubic meters of radioactive wastewater, becoming a sword of Damocles hanging over the marine ecology.
Unhealed trauma
After the Chernobyl accident, an area of 2,600 square kilometers became an isolation zone. Scientists estimate that it will take tens of thousands of years to completely eliminate nuclear radiation in the area, and some areas may even need 200,000 years of natural purification to meet human habitation standards.
According to the United Nations, the Chernobyl accident caused:
93,000 deaths
270,000 people suffered from diseases such as cancer
155,000 square kilometers of land were contaminated
8.4 million people were affected by radiation
In Fukushima, although the authorities claimed that the radiation in the surrounding waters had dropped to a "safe level", scientists still detected radioactive isotopes such as carbon 14, cobalt 60 and strontium 90 in the treated wastewater in 2019. These substances are easily enriched in marine organisms, and the concentration of cobalt 60 in seabed sediments may increase by 300,000 times.
Invisible threats and visible protection
In these disasters, the biggest threat comes precisely from radiation that is invisible to the human eye. In the early days of the Chernobyl accident, there was not even a single instrument that could accurately measure radiation values, resulting in countless rescue workers being exposed to deadly radiation without knowing it.
It is these painful lessons that have led to the rapid development of radiation monitoring technology. Today, accurate and reliable radiation monitoring equipment has become the "eyes" and "ears" of nuclear facility safety, building a technological barrier between invisible threats and human safety.
The mission of Shanghai Renji is to create this pair of "eyes" to protect human safety. We know that:
• Every accurate measurement of microsieverts may save a life
• Every timely warning may avoid an ecological disaster
• Every reliable equipment is protecting our common home
From environmental and regional radioactivity monitoring equipment to portable radiation monitoring instruments, from laboratory measurement devices to ionizing radiation standard devices, from radiation protection equipment to radiation monitoring software platforms, from channel-type radioactivity detection equipment to nuclear emergency and safety monitoring devices, Renji's product line covers every aspect of nuclear safety monitoring. Our technology can detect extremely small amounts of radioactive substances, just like accurately identifying a drop of abnormal water in a standard swimming pool.
Rebirth from disaster: Technology protects the future
In the Chernobyl exclusion zone, wolves evolved anti-cancer genes, and their immune mechanisms were used in the development of new drugs, proving that disasters promote adaptive evolution. Under the shadow of nuclear disasters, the combination of technology and responsibility not only created a miracle of protecting life, but also reshaped the future of human coexistence with radiation. We believe that technology and responsibility can also create miracles to protect life.
After the Fukushima accident, an international team of scientists established a trans-Pacific radiation monitoring network. Through highly sensitive detection equipment, the diffusion paths of cesium 134 and cesium 137 were tracked, providing valuable data for marine ecological research. This spirit of global collaboration and technological protection is exactly the value advocated by Renji.
Shanghai Renji's vision is clear: to become a shaper of the innovative ecology in the field of radiation detection. "Serving society with science and technology and creating a new radiation safety environment" is our mission.
Make every use of nuclear energy safe and controllable, and make every radiation risk clearly visible. We not only provide equipment, but also provide a full range of solutions from monitoring to analysis, so that nuclear technology can truly benefit mankind safely.
Written at the end
Historical nuclear disasters warn us: nuclear energy is like a double-edged sword. Only with awe and the shield of technology can we harness its power.
Next to the ruins of Chernobyl, a new forest is growing tenaciously. On the coast of Fukushima, fishermen cast their fishing nets of hope again. Every step that mankind takes out of the disaster is inseparable from the adherence to safety and trust in technology.
Shanghai Renji is willing to be the guardian in this long journey - to build a safety line with precise instruments and to protect the dignity of life with unremitting innovation. Because every milliroentgen measurement carries respect for life; every silence of the alarm is a tribute to human wisdom.
Radiation is invisible, but protection is bounded!
Invisible radiation, visible responsibility
At 1:23 a.m. on April 26, 1986, residents of Pripyat in northern Ukraine were awakened by a loud noise. Reactor No. 4 of the Chernobyl Nuclear Power Plant exploded, and 50 tons of nuclear fuel evaporated instantly, releasing 400 times the radiation of the Hiroshima atomic bomb. The operators working at the nuclear power plant and the first firefighters who arrived were exposed to 30,000 roentgens of deadly radiation per hour without any protection - and 400 roentgens absorbed by the human body is enough to be fatal.
This disaster kicked off the most tragic nuclear accident in human history. 28 firefighters died of acute radiation sickness in the following three months. They died in extreme pain with black skin, oral ulcers, and hair loss. 36 hours after the accident, 130,000 residents were forced to evacuate their homes.
25 years later, on March 11, 2011, the core of the Fukushima Daiichi Nuclear Power Plant in Japan melted down in the tsunami caused by the earthquake. A 14-meter-high wave broke the seawall, and three reactors exploded one after another, and 180 trillion becquerels of radioactive cesium 137 instantly poured into the Pacific Ocean. To this day, the nuclear power plant still stores more than 1.2 million cubic meters of radioactive wastewater, becoming a sword of Damocles hanging over the marine ecology.
Unhealed trauma
After the Chernobyl accident, an area of 2,600 square kilometers became an isolation zone. Scientists estimate that it will take tens of thousands of years to completely eliminate nuclear radiation in the area, and some areas may even need 200,000 years of natural purification to meet human habitation standards.
According to the United Nations, the Chernobyl accident caused:
93,000 deaths
270,000 people suffered from diseases such as cancer
155,000 square kilometers of land were contaminated
8.4 million people were affected by radiation
Post time: Jun-20-2025