AP1000 defense in depth uses passive safety systems, to enhance safety and simplify design.

The AP1000® PWR uses extensively analyzed and tested passive safety systems to improve the safety of the plant. The Advisory Council on Reactor Safeguards (ACRS) and the U.S. NRC have scrutinized these systems and ruled that they meet the U.S. NRC single-failure criteria, and other safety criteria such as Three Mile Island lessons learned, and ...

The AP1000 is a two-loop, 1000-MWe pressurized water reactor (PWR) with passive safety features and extensive plant simplifications to enhance the construction, operation, and maintenance.

Passive Safety Features: No Need for Safety-Related AC Power • Passive decay heat removal – Natural circulation through PRHRHX connected to RCS • Passive safety injection 17 –N2 pressurized accumulators – Density-difference-driven flow from core makeup tanks – Gravity drain from refueling water storage tank

The safety systems for both AP600 and AP1000 include passive safety injection, passive residual heat removal, and passive containment cooling. All these passive systems meet the NRC single-failure criteria and other recent criteria, including Three Mile Island lessons learned, unresolved safety issues, and generic safety issues. Passive systems ...

During a station blackout, or loss of all electrical power, the AP1000 plant's passive safety system shuts down the reactor automatically, with no need for human intervention for up to 72 hours. The AP1000 plant's truly innovative technology harnesses natural forces like gravity, convection and condensation to achieve safe shutdown of the reactor.

2006年8月1日 · The safety systems for both AP600 and AP1000 include passive safety injection, passive residual heat removal, and passive containment cooling. All these passive systems meet the NRC single-failure criteria and addresses Three Mile Island lessons learned, unresolved safety issues, and generic safety issues.

Passive Safety-Related Systems. The AP1000 reactor safety-related passive systems and equipment are sufficient to automatically establish and maintain core cooling and containment integrity indefinitely following design-basis events, assuming the most limiting single failure, with no operator action, and no on-site or off-site ac power sources.

All safety functions of the AP1000 TM rely on natural forces like natural circulation, gravity, convection, evaporation, condensation and compressed gas.

The AP1000 has a passive residual heat removal (PRHR) subsystem that protects the plant against transients that upset the normal heat removal from the primary system by the steam generator ...