Nuclear Power Applications
 

Liquid Waste Storage

Application

Waste liquids from sumps, radioactive leakage collectors, the Reactor Cooling System (RCS), and allied systems are collected, stored and processed. Inactive wastes are discharged or reused; active wastes are collected for processing. Radioactive liquids can provide make-up to the RCS, the ECCS, and the spent fuel storage pool.

Challenges

Waste liquids are collected and stored in large single- and double-walled tanks designed to suit radioactivity levels. Tanks are monitored for activity levels and their contents are processed, released or reused. Tank level instruments, frequently of redundant design, indicate inventory levels and protect against overfilling or underfilling that cavitates pumps. Prevention of tank overfilling.

Suitable Products

Atlas™ Magnetic Level Indicator

Aurora® Magnetic Level Indicator

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Feedwater Heaters and Storage


Application

Low and High Pressure Feedwater Heaters use extraction steam from the turbine to pre-heat feedwater destined for steam generation. The primary water sources for the heaters are the Condensers and Condensate Storage Tank. The Emergency Service Water System or the Ultimate Heat Sink (usually a river or lake) provides back-up feedwater to the SGs in the event of an interruption in the primary feedwater system.

Challenges

Redundant control loops manage feedwater heater level to prevent liquid from rising into the extraction steam; keep tubes in the condensing zone immersed; keep the drain cooler flooded, and optimize heater performance. The primary and back-up feedwater sources are typically equipped with level switches for valve actuation and alarms.

Suitable Products

Atlas™ Magnetic Level Indicator

Aurora® Magnetic Level Indicator

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Diesel Fuel Storage Tanks

Application

Diesel-powered engine-generator sets provide emergency power to operate critical nuclear plant systems in the event of a loss of station service power. The main diesel fuel storage tank provides a fuel capacity for one to seven days of full-load generator operation. The main storage tank is connected to an indoor day tank holding less than 1,000 gallons.

Challenges

Main storage tanks typically require a fuel level indicator with a remote indication transmitter. Sensors actuating electrical pumps connected to the main tank continuously monitor day tank fuel level. Day tank high-level alarms can lock out supply pumps until a system reset. Low levels and critical low-levels actuate alarms and the system will display the low-level conditions.

Suitable Products

Atlas™ Magnetic Level Indicator

Aurora® Magnetic Level Indicator

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Lubrication Oil Storage

Application

Nuclear plants operate many machines that require lubrication. Lubricants prevent damage caused by excessive friction and prolong equipment life. Oil is stored in stainless steel and carbon steel tanks. A generator gearbox lube oil system may have a reservoir with a capacity of 3,000 gallons and a turbine oil system may have a capacity of 150 gallons.

Challenges

Level monitoring of oil reservoirs will ensure the proper functioning of pumps, gearboxes, drives, compressors, materials handling equipment, generators and turbines. Temperature shifts in oil reservoirs affect media density that excludes some technologies, such as DP devices. Because ISO cleanliness levels increase oil change frequency, controls should be easy to remove.

Suitable Products

Atlas™ Magnetic Level Indicator

Aurora® Magnetic Level Indicator

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