SCR system definition

SCR system means a system capable of converting gaseous pollutants into harmless or inert gases by injecting a consumable reagent, which is a reactive substance to reduce tailpipe emissions and which is adsorbed onto a catalytic converter;
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SCR system means the combination of components necessary for NOx to be reduced by selective catalytic reduction. These components include the DEF tank, DEF injection system, SCR catalyst(s), and associated sensors.
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SCR system means the combination of components necessary for NOx to be reduced by selective catalytic reduction. These components include the DEF tank, DEF injection system,
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Examples of SCR system in a sentence

  • Further NOx reduction will be accomplished by the supply of the SCR system.

  • Effective January 1, 2012 the additional $0.75 shall be rolled into the Control Room Operator base hourly rate of pay for the NOx SCR system responsibilities.

  • The HRSG is equipped with a selective catalytic reduction (SCR) system to reduce the stack NOx emission levels.

  • The additional $0.25 shall be rolled into the Floor Operator base hourly rate of pay for the NOx SCR system responsibilities.

  • A single test of an engine without a control system installed, followed by one with the system installed, is not considered to be adequate for all SCR ETVs. Emissions from engines or vehicles may increase if changes in the product performance occur as the SCR system ages.

  • The second page of the application is used to describe the SCR system fully and concisely.

  • It requires a concise (300 words or less) description of the SCR system being verified and requests a number of operating details that summarize the emissions control performance expected, along with the product’s operation.

  • In its simplest form, an SCR system includes a reductant storage and injection system, a control unit, and one catalyst.

  • The SCR system shall reduce levels of NOx (oxides of nitrogen emitted from engines) by injecting small quantities of diesel exhaust fluid (DEF) into the exhaust upstream of a catalyst, where it vaporizes and decomposes to form ammonia and carbon dioxide.

  • Functional testing of the reductant level monitoring and notification system, the reductant leak monitoring and notification system, and other SCR system malfunction monitoring systems will be conducted.


More Definitions of SCR system

SCR system means the selective catalytic reduction system specified in the Technical Specifications, including the Catalyst, SCR Material Handling Systems, ammonia injection grid, ductwork, and appurtenant Materials for Units 1 and 2.
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