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1. Unveil! How does a nuclear power plant survive the winter?
During winter, nuclear power plants mainly adopt a series of targeted anti freezing and insulation measures to ensure the normal operation of key equipment and systems. Here are the specific secrets of wintering in nuclear power plants:
1. Key equipment anti freezing protection, heating equipment and insulation layer: Nuclear power plants install electric heat tracing belts or use the steam heat tracing system of nuclear power plants to maintain temperatures above freezing point on exposed nuclear and conventional island important pipelines, valves, pumps and other equipment. At the same time, insulation materials such as rock wool and fiberglass are used to wrap these devices to reduce heat loss. Instrumentation and control system: Install a constant temperature protection box on precision instruments (such as pressure gauges and flow meters) to prevent abnormal or ineffective readings caused by low temperatures. In addition, a constant temperature (usually ≥ 10 ℃) is maintained between the main control room and electrical equipment to prevent electronic components from malfunctioning due to low temperatures.
2. Anti freezing management of cooling system Circulating water anti freezing: When cold air arrives, the reactor coolant drain tank, boric acid solution storage and preparation tank, and other tanks will activate the heater and recirculation system with automatic control function for water temperature to prevent static water from freezing.
. If shutdown is required, the pipeline needs to be emptied or antifreeze (such as ethylene glycol solution) needs to be injected. Wrapped heating cable: A heating cable with special techno
III. Power and Energy Security Backup Power Redundancy: Ensure that emergency power sources such as diesel generators and lead-acid batteries are on standby and regularly test their low-temperature start-up performance.
. Intelligent monitoring and strengthened inspection: Establish a technical backbone team, assign dedicated personnel to monitor the intelligent monitoring platform of transmission lines 24 hours a day, and strengthen inspections of external transmission lines of nuclear power plants. Regularly report information such as online temperature and ice thickness of wires, and closely monitor trend changes. In plant heating system: Maintain the normal operation of the internal heating system of the nuclear power plant (such as steam tracing system or electric heater), with a focus on equipping various electric heaters in rooms such as nuclear auxiliary buildings, diesel generator buildings, and electrical buildings to ensure that the temperature in the rooms meets the operating conditions of the equipment.4. Structure and Environmental Protection Windproof and Snow Treatment: For nuclear power plants located in the north, reinforce the roofs of the buildings in the plant area to prevent snow overload;
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