Question

define heat cycle............​

Answer 1

Answer:

each time is tire is raised to operating temperature is a heat cycle

Explanation:

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Answer 2

Cycle and features of the PWR

The heat cycle of the PWR consists of two coolant systems. The primary coolant system utilizes pressurized water as the reactor core coolant. The heat of the pressurized water is transferred to the secondary coolant system in steam generators, and water in the secondary coolant system is converted to steam for driving turbines. The secondary coolant system is separated from the primary coolant system in the steam generators, and the components in the secondary coolant system, including the steam turbines, do not require the radiation protection measures in their operation and maintenance.

A schematic diagram and typical specifications for the PWR main system are shown in Fig. 3.8 and Table 3.4 [12,13]. The primary coolant circulates in loops from the reactor core to the steam generators by the reactor coolant pumps. The pressure of the primary coolant system is controlled and maintained at about 15.4 MPag by a pressurizer which consists of electrical heaters, spray, relief, and safety valves. The temperature of the pressurized water is raised by the reactor core to about 325°C, and the heat is transferred to the secondary system in the steam generators. Two-phase steam-water flow is generated, and its water fraction is separated in multistage moisture separators in the steam generators. The steam of about 6.0 MPag and 277°C migrates to the steam turbine to generate electricity, and is then cooled and returned to the water in the condensers.

Explanation:

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