EPRI EXAM 2 QUESTIONS WITH CORRECT
ANSWERS!!
What is the primary safety concern for nuclear power plant operations?
Preventing significant radiation exposure to the public during routine and accident conditions.
How is the primary safety concern for nuclear power plant operations achieved?
Employing fission product barriers and engineered safety features.
Identify ways a core can fail
Any loss of core geometry, particularly into a configuration where cooling becomes impractical,
is considered a core failure
List three ways that the core has an inability to fully remove the heat created by the fuel
1. A failure of the heat removal systems
2. An increase of heat created beyond the ability of the heat removal systems
3. The inability to transfer heat from the fuel
What are the three fission product barriers?
1. fuel pellet and cladding
2. Reactor Coolant System (RCS) pressure boundary
3. Containment
Prevents the escape of fission products from cladding
Fuel pellet and cladding (first fission product barrier)
Contains the radionuclides that escaped the cladding or were produced outside the
cladding
RCS pressure boundary (second fission product barrier)
Holds radionuclides that have escaped from the RCS
Containment (third fission product barrier)
, The defense-in-depth policy states that a utility should:
1. Design to prevent the occurrence of nuclear accidents
2. Assume that accidents will occur
3. Provide proven capability to meet the range of worst-case accidents
Defined as hypothesized events that affect one or more of the radioactive material barriers
and that are not expected during plant operations
Accidents
What are two accident types that are considered?
1. Mechanical failure of a single component leading to the release of radioactive material from
one or more barriers
2. Arbitrary rupture of any single pipe up to and including complete severance of the largest pipe
in the nuclear system process barrier
By definition, what is typically a worst-case accident of interest
Design Basis Accident (DBA)
When designing a plant, the philosophy documented in the FSAR contains several layers.
Which of the following assumptions are used to ensure core protection?
a. The plant is operating in a given band via proper control
b. The plant is assumed to be in steady state prior to the transient
c. The plant is being operated within Technical Specifications
A design basis accident is typically a worst-case accident of interest.... T/F
True
- It is the specification to which a plant is designed
Primary safety concern for nuclear power plant operation is....
the protection of the public from the release of fission products
First line of defense is....
ANSWERS!!
What is the primary safety concern for nuclear power plant operations?
Preventing significant radiation exposure to the public during routine and accident conditions.
How is the primary safety concern for nuclear power plant operations achieved?
Employing fission product barriers and engineered safety features.
Identify ways a core can fail
Any loss of core geometry, particularly into a configuration where cooling becomes impractical,
is considered a core failure
List three ways that the core has an inability to fully remove the heat created by the fuel
1. A failure of the heat removal systems
2. An increase of heat created beyond the ability of the heat removal systems
3. The inability to transfer heat from the fuel
What are the three fission product barriers?
1. fuel pellet and cladding
2. Reactor Coolant System (RCS) pressure boundary
3. Containment
Prevents the escape of fission products from cladding
Fuel pellet and cladding (first fission product barrier)
Contains the radionuclides that escaped the cladding or were produced outside the
cladding
RCS pressure boundary (second fission product barrier)
Holds radionuclides that have escaped from the RCS
Containment (third fission product barrier)
, The defense-in-depth policy states that a utility should:
1. Design to prevent the occurrence of nuclear accidents
2. Assume that accidents will occur
3. Provide proven capability to meet the range of worst-case accidents
Defined as hypothesized events that affect one or more of the radioactive material barriers
and that are not expected during plant operations
Accidents
What are two accident types that are considered?
1. Mechanical failure of a single component leading to the release of radioactive material from
one or more barriers
2. Arbitrary rupture of any single pipe up to and including complete severance of the largest pipe
in the nuclear system process barrier
By definition, what is typically a worst-case accident of interest
Design Basis Accident (DBA)
When designing a plant, the philosophy documented in the FSAR contains several layers.
Which of the following assumptions are used to ensure core protection?
a. The plant is operating in a given band via proper control
b. The plant is assumed to be in steady state prior to the transient
c. The plant is being operated within Technical Specifications
A design basis accident is typically a worst-case accident of interest.... T/F
True
- It is the specification to which a plant is designed
Primary safety concern for nuclear power plant operation is....
the protection of the public from the release of fission products
First line of defense is....
