FUN 2 EO: 1.4-j - Radiation Protection Tech.

FUN 2 EO: 1.4-j

1 / 15

The core spray system functions by:

Spraying water on top of the fuel assemblies

Regulating the reactor's internal pressure

Injecting coolants at the base of the reactor

Monitoring radiation levels continuously

2 / 15

The low pressure emergency core cooling systems consist of:

ADS and HPCI systems

Dual nuclear process barriers

Two independent HPCI systems

Core spray system and LPCI mode of the residual heat removal system

3 / 15

Automatic depressurization is needed when:

The emergency systems fail to start during testing

The nuclear process barrier is functioning perfectly

The high pressure coolant injection system is inoperable and a break has occurred

The reactor needs a routine pressure release

4 / 15

The dominant mode of the residual heat removal system is:

High pressure coolant injection mode

Automatic depressurization mode

Low pressure coolant injection mode

Core spray system mode

5 / 15

The core spray system consists of:

Two separate and independent pumping loops

Four relief valves for pressure release

One central pumping mechanism

Three backup coolant injection systems

6 / 15

The automatic depressurization system (ADS) operates to:

Provide reactor depressurization for certain loss of coolant accidents

Manually regulate the temperature inside the reactor

Prevent over-cooling of the reactor core

Maintain regular reactor pressures during operations

7 / 15

The high pressure coolant injection system can supply make up water to the reactor vessel until:

Reactor pressure has decreased below approximately 100 psig

The low pressure emergency systems are activated

The reactor is fully depressurized

Reactor reaches its maximum pressure level

8 / 15

Which system requires no auxiliary ac power, plant air systems, or external cooling water systems to function?

High pressure coolant injection (HPCI) system

Low pressure coolant injection (LPCI) mode

Core spray system

Automatic depressurization system (ADS)

9 / 15

The residual heat removal system primarily takes water from:

Automatic relief systems

Internal coolant chambers

External water sources

The suppression pool

10 / 15

The emergency core cooling systems (ECCS) are designed to:

Control the reactor temperature during normal operations

Monitor radiation levels inside the reactor

Provide core cooling under loss of coolant accident conditions

Ensure a backup power supply to the reactor

11 / 15

During a loss of coolant accident, the low pressure coolant injection mode's goal is to preclude fuel cladding temperatures from exceeding:

3200 F

1000 F

1800 F

2200 F

12 / 15

For core cooling protection, flow from the low pressure ECCS is not required until:

Reactor pressure has decreased below approximately 100 psig

High pressure ECCS have started functioning

Reactor pressure has increased above 200 psig

Core temperature has reached a certain threshold

13 / 15

The core spray system and low pressure coolant injection mode operate at:

Low pressures

Medium pressures

Variable pressures

High pressures

14 / 15

The emergency core cooling systems consist of how many high pressure systems?

Three

Two

One

Four

15 / 15

What is the purpose of the high pressure coolant injection system?

Provide a backup power source during outages

Maintain radiation levels inside the core

Operate while the nuclear system is at high pressure

Cool the core during normal operations

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