NANTeL Plant Systems Overview 2

Question 1

What is the primary function of the Emergency Core Cooling System (ECCS) in a nuclear power plant?

Accepted Answer

To inject water into the reactor core during a loss-of-coolant accident

Answer

The ECCS injects large volumes of water into the reactor core to prevent fuel damage during a loss-of-coolant accident (LOCA).

Question 2

In a pressurized water reactor (PWR), which component maintains the primary coolant at operating pressure?

Accepted Answer

The pressurizer

Answer

The pressurizer uses heaters and spray nozzles to maintain primary system pressure, preventing coolant from boiling in the reactor.

Question 3

What is the role of the turbine bypass system in a nuclear power plant?

Accepted Answer

To route steam directly to the condenser, bypassing the turbine during transients

Answer

The turbine bypass system diverts excess steam to the condenser during transients or load rejections, preventing overpressure in the secondary system.

Question 4

Which plant system is responsible for removing residual decay heat after reactor shutdown?

Accepted Answer

The Residual Heat Removal (RHR) system

Answer

The RHR system circulates coolant through heat exchangers to remove decay heat from fission product decay after the reactor shuts down.

Question 5

In a boiling water reactor (BWR), where does steam generation occur?

Accepted Answer

Directly in the reactor pressure vessel

Answer

In a BWR, coolant water boils directly in the reactor pressure vessel, producing steam that drives the turbine without a secondary loop.

(NANTeL) National Academy for Nuclear Training e-Learning Practice Test

(NANTeL) National Academy for Nuclear Training e-Learning Practice Test

NANTeL Plant Systems Overview 2