(5) Roughly, twice the amount of heat that has been converted in the turbine for the production of electric power is removed in the condenser for further rejection to the environment due to the second law of thermodynamics which limits the fraction of useful energy that can be attained by a thermal engine. (p.236)
(6) In order to provide additional margin to the containment recirculation screens of AP1000 design, metal reflective insulation is used on lines that are subject to jet impingement during loss-of-coolant accidents and that are not shielded from blowdown jets. As a result, fibrous debris is not generated by loss-of-coolant accidents. Insulation located in a spherical region within a
distance equal to 20 inside diameters of the LOCA pipe break is assumed to be affected by the LOCA when there are intervening components, supports, structures, or other objects. In the absence of intervening components,
supports, structures, or other objects, insulation in a cylindrical area extending out a distance equal to 45 inside diameters from the break along an axis that is a continuation of the pipe axis and up to 5 inside diameters in the radial direction from the axis is assumed to be affected by the LOCA.