 Language

新闻中心

NEWS CENTER

Chemical Decontamination Radioactive Liquid Waste Drain Tank

Release time:

2025-04-22

Chemical Decontamination Radioactive Liquid Waste Drain Tank is a specialized, safe, and sealed container used for treating liquid waste containing radioactive substances and achieving decontamination and temporary storage through chemical methods. It is crucial in fields such as the nuclear industry, medical radioactive waste treatment, and nuclear power plant operation and maintenance. It is mainly used for the collection, chemical decontamination reaction, temporary storage, and safe discharge of radioactive liquid waste.

Core Functions and Characteristics

1.Chemical Decontamination Reaction Vessel

- Chemical precipitation, redox, and ion exchange decontamination reactions are carried out in the tank to reduce the radioactivity of the liquid waste.
- Equipped with a stirring device, heating/cooling system to ensure uniform and efficient reactions.

2.Radioactive Shielding and Sealing

- Shielding Design: The tank body uses lead, steel-concrete composite structure, or high-density polyethylene (HDPE) to effectively block gamma rays and neutron radiation.
- Multi-layer Sealing: Key parts such as flange interfaces and valves use double sealing or bellows design to prevent aerosol leakage.

3.Liquid Waste Temporary Storage and Monitoring

- Built-in liquid level sensors and radiation dose probes (such as Geiger-Muller counters) for real-time monitoring of the liquid waste status.
- Supports remote control to reduce the risk of direct personnel contact.

4.Solid-Liquid Separation and Discharge Control

- Some drain tanks integrate centrifuges and filters (such as ceramic membranes and activated carbon) to separate the solid residues and purified liquid after decontamination.
- The purified liquid needs to meet the discharge standards, and the concentrated radioactive sludge is transferred to the solidification treatment system (such as cement solidification).

Typical Application Scenarios

1.Nuclear Power Plant Operation and Maintenance

- Treating radioactive nuclides (such as ¹³⁷Cs, ⁶⁰Co) in reactor coolant and equipment flushing wastewater.

2.Nuclear Medicine and Laboratories

- Decontaminating medical or laboratory liquid waste containing radioactive isotopes (such as ¹³¹I, ⁹⁹mTc).

3.Nuclear Fuel Reprocessing Plants

- Treating high-level radioactive liquid waste (such as acidic liquid waste containing ²³⁸U, ²³⁹Pu) to reduce its hazard.

Safety Design Points

Anti-corrosion Materials: Lined with fiberglass-reinforced plastic, Hastelloy, or titanium to withstand strong acid/alkali liquid waste.
Redundant Safety Systems: Equipped with overflow alarms, emergency emptying valves, and backup power supplies to prevent overpressure or leakage.
Decontamination and Washdown Interface: A flushing and spraying device is set on the outside of the tank to deal with accidental contamination.

Differences from Ordinary Drain Tanks

Characteristics	Radioactive Liquid Waste Drain Tank	Ordinary Industrial Drain Tank
Shielding Protection	Must contain lead/concrete shielding layer	No special shielding requirements
Sealing Level	Air tightness (to prevent aerosol leakage)	Conventional leak prevention is sufficient
Monitoring System	Multi-parameter monitoring of radiation dose, liquid level, pH value, etc.	Only liquid level/pressure monitoring
Discharge Standard	Must comply with radioactive activity limits (such as GB 18871)	Conventional environmental protection standards (such as COD, heavy metals)