Nuclear Street - Nuclear Power Plant News, Jobs, and Careers

The Mark I containment design consists of several major components, many of which can be seen on below. These major components include:

• The drywell, which surrounds the reactor vessel and recirculation loops
• A suppression chamber, which stores a large body of water (suppression pool)
• An interconnecting vent network between the drywell and the suppression chamber
• The secondary containment, which surrounds the primary containment (drywell and suppression pool) and houses the spent fuel pool and emergency core cooling systems.