EEE 460 Nuclear Concepts for the 21st Century
Spring 2006
Problem: This problem uses data from the U.S. National Institute of Standards and Technology (NIST), see http:/physics.nist.gov/PhysRefData/XrayMassCoef/cover.html . Using photon energies from 1 ke
Arizona State University | Chapter9B
So now, I want to move on to a couple of very important parameters- the neutron flux. And with the
neutron flux and our cross sections, we're going to be able to calculate reaction rates now. So let's
make a few defini
Arizona State University | Chapter10B
OK, so now that we know about mean free path and attenuation, I would like to try an example using a,
quote, "neutron shield" that's made out of water. So here we have this water shield. It could be a tank. It
could b
Midterm Exam Review
EEE 460
EEE 460
Midterm Exam Review
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Arizona State University | Chapter7A
Welcome back. So today we tackle chapter four. At least, we begin chapter four. The first subject up on
our list is that of nuclear reactions. So let's get started with that.
So if we take a look at this particular nuc
Arizona State University | Chapter4A
OK, so today we begin Chapter 3. We want to take a look first at Nuclear Stability, what that's all about.
And this really leads to the topic of Radioactive Decay. So I've broken chapter three into two three days
worth
Ch 4: Binary Reactions
EEE 460
EEE 460
Binary Reactions
Binary Reaction: X(a,b)Y
Here two reactants and two products exist
X+a
(a + X)*
b+Y
reactants compound nucleus products
We can find the Q value and the kinetic
energies from (usually the target ato
Arizona State University | Chapter7B
So I want to continue that thought about radioactive decay, as well as these reaction energetics, if you
will, and combine the two together, because it makes for a fairly straightforward case for us to analyze
radioact
Arizona State University | Chapter10C
So I have been talking a lot about moderation. We now want to look at neutron migration, which is really
going to take us- end us on the topic of moderation.
So neutron scattering is the key to what is a good moderato
Ch 4: Attenuation & Migration
EEE 460
EEE 460
Particle Attenuation
Neutral Particle Attenuation
Remember, when we refer to
attenuation, we are speaking of a
reduction, and not necessarily an
elimination (or absorption)
The uncollided flux density throug
Arizona State University | Chapter8B
OK. So now we want to take a look at a binary reactions example. And, in fact, it's really more than one
example. I want to go through four different reactions here that are somewhat interrelated, because
we're going t
Ch 18: Other Power Reactors
EEE 460
EEE 460
Other Power Reactors
Introduction
LWRs constitute more than 80% of
the power reactors worldwide, but
there are significant numbers of
heavy water reactors and gas cooled
reactors
Generally, the reactor type is
Ch 16: Four Factor Formula
EEE 460
EEE 460
Four Factor Formula
Criticality
A critical reactor achieves a selfsustaining fission chain reaction, such
that losses from neutron absorption
and leakage are balanced (or
compensated for) by fission-based
neutro
Ch 4: Flux & Reaction Rates
EEE 460
EEE 460
Energy-Dependent Neutron
Cross Sections
Neutron Reaction Hierarchy
From the last lecture
Combining cross sections:
t = s + a = (e + i) + ( + f + )
t = s + a = (e + i) + ( + f + )
K. E. Holbert
1
Ch 4: Flux & Rea
Arizona State University | Chapter12A
OK. So welcome back, in our continuation of Chapter Five. Today we want to take a look at the neutral
particle interactions with material. Last time we had looked at really charged particle both divided into
heavy and
Ch 2: Atoms and Nuclei
EEE 460
EEE 460
Atoms and Nuclei
Atoms and Nuclei
Atomic: our interest is somewhat
focused on processes that excite or
remove electrons (i.e., ionization)
Nuclear: we are interested
Nucleus
in a variety of processes
(e.g., reactio
Arizona State University | Chapter4B
So we continue on with radioactive decay. We were looking at stability, and we found out that there are
various mechanisms by which the radionuclide will move itself from the instability, the radioactivity, over
to the
Arizona State University | Midterm
OK. So we're fast approaching the middle of the course, which is bringing us to the midterm exam. And
so I want to spend this entire session to try to give you a little bit of a review and prepare you-especially, you'll
ATOMIC NUMBER DENSITY
Number of Atoms (n) and Number Density (N)
The number of atoms or molecules (n) in a mass (m) of a pure material having atomic or molecular
weight (M) is easily computed from the following equation using Avogadro's number (NA = 6.022
Ch 4: Nuclear Reaction Energetics
EEE 460
EEE 460
Nuclear Reactions
Nuclear Reactions
Consider a generic nuclear reaction
with two reactants and two products:
a+XY+b
Target X is struck by particle a
The shorthand notation is: X(a,b)Y
There are four la
Arizona State University | Chapter12B
OK. Welcome back. So we've been looking at the interactions of the various radiations with I'll say
single nuclei in essence, or single atoms in most cases. But now let's try to pull ourselves back and
think, OK, what
Arizona State University | Chapter8A
So welcome back. Today we want to take a look at binary reactions. We ended the last time by making
some fundamental definition or examples regarding binary reactions.
And we remember that the main thing about the defi
Ch 18: Light Water Reactors
EEE 460
EEE 460
Nuclear Power Plants
Nuclear Power Plants
Today, we couple the nuclear reactor
to a power plant steam system to
produce electricity
Worldwide: ~450 power reactors;
U.S.: ~100 power reactors
A nuclear power pl
Arizona State University | Chapter10A
OK, so welcome back. We are continuing in chapter four. We want to take a look now at really neutron
attenuation, but I'm calling this particle attenuation because it's really going to be applicable to both
neutrons a
Arizona State University | Chapter9A
So welcome back. If you recall, last time we were looking at cross sections. I want to extend that
discussion about cross sections by now expanding so that we take a look at the fact that cross sections
are energy depe
Ch 3: Radioactive Chains
EEE 460
EEE 460
Transmutation
Introduction
Today, we expand upon the previous
lecture by
1. Including a term to account for the
production of radionuclides
2. Examining compound and complex
decay and long decay chains
Besides us
Arizona State University | Chapter1
So welcome to EEE 460. We are tackling chapter one today. I trust that you have read chapter one. It
will benefit you clearly best if you have already read the chapter because, of course, I want to hit the
high points,
Ch 16: Criticality & Multiplication Factors
EEE 460
EEE 460
Criticality
Multiplication Factors
Introduction
In Chapter 6, we introduced the
fission process that releases energy
and emits more neutrons, which can
lead to a chain of fission reactions
Here