PE Trivia Flashcards
(35 cards)
sintering
heating without melting
The primary interaction mechanism for 2 MeV gammas in concrete is
Compton Scattering
After the first few minutes past shutdown, the major source of decay heat in a nuclear reactor is
fission product decay
For a BWR, the major source of water for RCIC during long term recirculation is
suppression pool
In a BWR, if the normal heat removal system is still operative when the reactor is tripped, then the shutdown cooling is provided by
condensate from the condenser
Can a Geiger Mueller counter distinguish the radiation from different isotopes?
No. A GM counter provides no energy discrimination.
The enrichment of the fuel in a fast breeder reactor compared to that in a thermal reactor is
higher
Describe the relationship of fuel centerline temperature and fuel diameter for cylindrical fuel pins with an “infinitely” thin cladding and a constant coolant temperature.
the fuel centerline temperature is proportional to the fuel diameter squared.
A critical configuration of fissile material contains an extraneous (gamma, neutron) neutron source. The time behavior of this configuration increases __ with time
linearly
The physical form of Krypton is a
noble gas
The primary interaction mechanism for 2 MeV photons in concrete is
Compton Scattering
The total activity of spent fuel from a LWR first decays to a level less than that of natural uranium ore in a time (years) of nearly
10,000 years
The primary purpose of an ADS in a BWR is to
depressurize the BWR
Is bismuth germinate an effective gamma ray spectrometer?
No. It has poor resolution.
The product of milling uranium ore is
yellow cake, U3O8
Steam to the turbine from a PWR can be superheated if
once-through steam generators are used
Increasing the effective delayed neutron fraction will ___ the asymptotic period
increase
Increasing the effective delayed neutron fraction will ___ the size of the prompt drop (jump)
decrease
A thermal reactor core cannot have a significant nuclear yield like a nuclear weapon because
the neutron generation time is too long
The regulation that limits the amount of Kr-85 that can be routinely released offsite is which CFR?
10CFR20
The external dose from exposure to Kr-85 is mostly due to
gamma rays and beta rays
According to 10CFR30.4, a byproduct is
any radioactive material (WTEO SNM) yielded in or made radioactive by exposure to the radiation incident to the process of producing or utilizing SNM.
A self-powered neutron detector si so named because it
operates with no applied voltage. Beta decay from the neutron-activated emitter provides the detector current.
bismuth germanate detects
gammas
