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Secondary spill containment is the containment of hazardous liquids in order to prevent pollution of soil and water. Common techniques include the use of spill berms to contain oil -filled equipment, fuel tanks , truck washing decks, or any other places or items that may leak hazardous liquids.
The primary containment consists of "drywell" and "wetwell" concrete structures below the top level, immediately surrounding the reactor pressure vessel. The secondary containment includes the top floor with water-filled pools for storing fresh or irradiated fuel and for storage of irradiated tools and structures. [27] [51]
The primary containment structure is made of steel 1 inch thick; The secondary containment structure is made of steel-reinforced, pre-stressed concrete 1.2–2.4 meters (3.9–7.9 ft) thick. The reactor building (the shield wall/missile shield) is also made of steel-reinforced, pre-stressed concrete 0.3 to 1 m (0.98 to 3.28 ft) thick.
Additionally, there have been similar designs that use double containment, in which containment from two units are connected allowing a larger containment volume in the case of any major incident. This has been pioneered by one Indian HWR design where a double unit and suppression pool was implemented.
15:30: Workers complete connection cabling to the Unit 2 SLC pumps, powering up the mobile generator outside Unit 2. 15:36: There is a massive hydrogen explosion in the reactor building of unit 1. The primary containment is not damaged, but there is extensive damage to the secondary containment (the reactor building). [22] Five workers are ...
14 portable light tower generator units stationed throughout the city. In addition to the towers, ESU can also deploy 60 kW, 90 kW, 100 kW and 200 kW generators upon request for additional power when required. Four Mobile Light Generators which are specialized light-power units with tower generators mounted in the bed of pickup trucks. [15]
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