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

FUN 2 EO: 1.4-j

1 / 15

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

Reactor pressure has decreased below approximately 100 psig

Reactor pressure has increased above 200 psig

Core temperature has reached a certain threshold

High pressure ECCS have started functioning

2 / 15

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

2200 F

3200 F

1000 F

1800 F

3 / 15

The residual heat removal system primarily takes water from:

Internal coolant chambers

The suppression pool

External water sources

Automatic relief systems

4 / 15

Automatic depressurization is needed when:

The nuclear process barrier is functioning perfectly

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

5 / 15

The low pressure emergency core cooling systems consist of:

Two independent HPCI systems

ADS and HPCI systems

Dual nuclear process barriers

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

6 / 15

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

Four

Two

One

Three

7 / 15

The automatic depressurization system (ADS) operates to:

Manually regulate the temperature inside the reactor

Prevent over-cooling of the reactor core

Maintain regular reactor pressures during operations

Provide reactor depressurization for certain loss of coolant accidents

8 / 15

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

Operate while the nuclear system is at high pressure

Maintain radiation levels inside the core

Cool the core during normal operations

Provide a backup power source during outages

9 / 15

The core spray system functions by:

Monitoring radiation levels continuously

Regulating the reactor's internal pressure

Injecting coolants at the base of the reactor

Spraying water on top of the fuel assemblies

10 / 15

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

High pressures

Medium pressures

Variable pressures

Low pressures

11 / 15

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

Core spray system

Low pressure coolant injection (LPCI) mode

High pressure coolant injection (HPCI) system

Automatic depressurization system (ADS)

12 / 15

The dominant mode of the residual heat removal system is:

Low pressure coolant injection mode

Automatic depressurization mode

Core spray system mode

High pressure coolant injection mode

13 / 15

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

Monitor radiation levels inside the reactor

Control the reactor temperature during normal operations

Ensure a backup power supply to the reactor

Provide core cooling under loss of coolant accident conditions

14 / 15

The core spray system consists of:

Two separate and independent pumping loops

One central pumping mechanism

Three backup coolant injection systems

Four relief valves for pressure release

15 / 15

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

Reactor reaches its maximum pressure level

Reactor pressure has decreased below approximately 100 psig

The reactor is fully depressurized

The low pressure emergency systems are activated

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