EPRI CORE PROTECTION NANTEL EXAM COMPLETE QUESTIONS
AND ALL ANSWERS VERIFIED (NEWEST)
What is the main safety issue with nuclear power plant operations? ANSWER:
Preventing the public from being exposed to high levels of radiation in both
normal and accident situations.
How is the main operational safety concern for nuclear power plants met?
ANSWER: Using engineered safety measures and barriers made of fission
products.
Determine the causes of core failure. ANSWER Any loss of core geometry is
regarded as a core failure, especially when it results in a configuration where
cooling is not feasible.
Give three reasons why the fuel's heat cannot be completely removed by the
core (ANSWER 1). A breakdown in the processes that remove heat
Two. An increase in heat production that exceeds what the heat removal
systems can handle
Third. The fuel's incapacity to transmit heat
Which three obstacles apply to fission products? ANSWER 1. cladding and fuel
pellets
Two. Pressure boundary of the Reactor Coolant System (RCS)
Third. Keeping things contained
ANSWER Fuel pellet and cladding (initial fission product barrier): prevents
fission products from escaping from cladding
includes the radionuclides that were generated outside of the cladding or that
escaped it: ANSWER RCS pressure boundary (second fission product barrier).
contains radionuclides that have gotten above the third fission product barrier,
or RCS-ANSWER Containment.
According to the defense-in-depth policy, a utility should: - ANSWER 1.
Design to stop nuclear accidents from happening
, Two. Assume that mishaps will happen.
Third. Demonstrate your capacity to handle the variety of worst-case scenarios.
ANSWER accidents are defined as speculative occurrences that impact one or
more of the radioactive material barriers that are not anticipated during plant
operations.
Which two categories of accidents are taken into consideration? ANSWER 1.
When one component fails mechanically, radioactive material can leak out of
one or more barriers.
Two. The nuclear system process barrier allows for the arbitrary rupture of any
one pipe up to and including the total severance of the largest pipe.
ANSWER Design Basis Accident (DBA) is, by definition, the worst-case
accident of interest.
The theory outlined in the FSAR has multiple layers when it comes to plant
design. What presumption is applied to guarantee core protection? ANSWER a.
The plant is using appropriate control to operate in a specific band.
b. Before the transitory, the plant is presumed to be in a steady condition.
c. Technical specifications are being followed when operating the plant.
Usually, the worst-case accident of interest is a design-based accident. T/F-
ANSWER YES
It's the specification that a plant is made to meet.
The main safety issue with nuclear power plants is... The public's protection
against the emission of fission products
The first line of defence is... Maintaining the core's coverage, cooling, and
appropriate reactivity
The plant's systems are built with multiple levels of security, including....
ANSWER automatic protective systems, alarms, and controls.
Accident mitigation is centred on... The reactor core is protected by ANSWER.
is ANSWER Probabilistic Risk Assessment (PRA), a quantitative evaluation of
the risk involved in plant operation and maintenance.
Probabilistic Safety Assessment (PSA) is another name for it.
What was PRA's first objective? ANSWER To detect and address plant
vulnerabilities after analysing and comprehending severe accident behaviour
AND ALL ANSWERS VERIFIED (NEWEST)
What is the main safety issue with nuclear power plant operations? ANSWER:
Preventing the public from being exposed to high levels of radiation in both
normal and accident situations.
How is the main operational safety concern for nuclear power plants met?
ANSWER: Using engineered safety measures and barriers made of fission
products.
Determine the causes of core failure. ANSWER Any loss of core geometry is
regarded as a core failure, especially when it results in a configuration where
cooling is not feasible.
Give three reasons why the fuel's heat cannot be completely removed by the
core (ANSWER 1). A breakdown in the processes that remove heat
Two. An increase in heat production that exceeds what the heat removal
systems can handle
Third. The fuel's incapacity to transmit heat
Which three obstacles apply to fission products? ANSWER 1. cladding and fuel
pellets
Two. Pressure boundary of the Reactor Coolant System (RCS)
Third. Keeping things contained
ANSWER Fuel pellet and cladding (initial fission product barrier): prevents
fission products from escaping from cladding
includes the radionuclides that were generated outside of the cladding or that
escaped it: ANSWER RCS pressure boundary (second fission product barrier).
contains radionuclides that have gotten above the third fission product barrier,
or RCS-ANSWER Containment.
According to the defense-in-depth policy, a utility should: - ANSWER 1.
Design to stop nuclear accidents from happening
, Two. Assume that mishaps will happen.
Third. Demonstrate your capacity to handle the variety of worst-case scenarios.
ANSWER accidents are defined as speculative occurrences that impact one or
more of the radioactive material barriers that are not anticipated during plant
operations.
Which two categories of accidents are taken into consideration? ANSWER 1.
When one component fails mechanically, radioactive material can leak out of
one or more barriers.
Two. The nuclear system process barrier allows for the arbitrary rupture of any
one pipe up to and including the total severance of the largest pipe.
ANSWER Design Basis Accident (DBA) is, by definition, the worst-case
accident of interest.
The theory outlined in the FSAR has multiple layers when it comes to plant
design. What presumption is applied to guarantee core protection? ANSWER a.
The plant is using appropriate control to operate in a specific band.
b. Before the transitory, the plant is presumed to be in a steady condition.
c. Technical specifications are being followed when operating the plant.
Usually, the worst-case accident of interest is a design-based accident. T/F-
ANSWER YES
It's the specification that a plant is made to meet.
The main safety issue with nuclear power plants is... The public's protection
against the emission of fission products
The first line of defence is... Maintaining the core's coverage, cooling, and
appropriate reactivity
The plant's systems are built with multiple levels of security, including....
ANSWER automatic protective systems, alarms, and controls.
Accident mitigation is centred on... The reactor core is protected by ANSWER.
is ANSWER Probabilistic Risk Assessment (PRA), a quantitative evaluation of
the risk involved in plant operation and maintenance.
Probabilistic Safety Assessment (PSA) is another name for it.
What was PRA's first objective? ANSWER To detect and address plant
vulnerabilities after analysing and comprehending severe accident behaviour
