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Fire Barrier Penetration Seals in Nuclear Power Plants

机译：核电站防火屏障渗透密封

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Nuclear power plants use the 'defense in depth' concept of echelons of fire protection to achieve a high degree of fire safety. The objective of this concept is to (1) prevent fires from starting; (2) rapidly detect, control, and extinguish those fires that do occur; and (3) protect structures, systems, and components important to safety so that a fire that is not promptly extinguished will not prevent the safe shutdown of the plant. Fire barrier penetration seals, which are but one part of one element of the fire protection defense-in-depth concept, are designed to maintain the fire rating of a barrier where penetrating items pass through the barrier. This is essential if the barrier maintain the fire rating of a barrier where penetrating items pass through the barrier. This is essential if the barrier is to confine a fire to the area in which it started or to protect plant systems and components within an area from a fire outside the area.

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