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

FUN 2 EO: 1.4-j

1 / 15

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

Variable pressures

High pressures

Medium pressures

Low pressures

2 / 15

The low pressure emergency core cooling systems consist of:

ADS and HPCI systems

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

Two independent HPCI systems

Dual nuclear process barriers

3 / 15

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

One

Three

Two

Four

4 / 15

The residual heat removal system primarily takes water from:

External water sources

The suppression pool

Automatic relief systems

Internal coolant chambers

5 / 15

The core spray system functions by:

Spraying water on top of the fuel assemblies

Monitoring radiation levels continuously

Regulating the reactor's internal pressure

Injecting coolants at the base of the reactor

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

Maintain regular reactor pressures during operations

Prevent over-cooling of the reactor core

7 / 15

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

Cool the core during normal operations

Maintain radiation levels inside the core

Operate while the nuclear system is at high pressure

Provide a backup power source during outages

8 / 15

The core spray system consists of:

Four relief valves for pressure release

One central pumping mechanism

Three backup coolant injection systems

Two separate and independent pumping loops

9 / 15

The dominant mode of the residual heat removal system is:

Core spray system mode

Automatic depressurization mode

Low pressure coolant injection mode

High pressure coolant injection mode

10 / 15

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

1800 F

1000 F

3200 F

2200 F

11 / 15

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

Low pressure coolant injection (LPCI) mode

High pressure coolant injection (HPCI) system

Automatic depressurization system (ADS)

Core spray system

12 / 15

Automatic depressurization is needed when:

The emergency systems fail to start during testing

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

The reactor needs a routine pressure release

The nuclear process barrier is functioning perfectly

13 / 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 reactor is fully depressurized

The low pressure emergency systems are activated

Reactor reaches its maximum pressure level

14 / 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

15 / 15

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

Core temperature has reached a certain threshold

Reactor pressure has decreased below approximately 100 psig

High pressure ECCS have started functioning

Reactor pressure has increased above 200 psig

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