by marilyn phillips mathematics instructor palacios high school team led by dr. karen vierow...
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by Marilyn Phillips
Mathematics Instructor
Palacios High School
Team led by Dr. Karen Vierow
Research Associate: Dr. Isaac Choutapalli
Dr. Vierow’s Grad Students
— Niki Williams—Countercurrent Flow Limitation Experiment with Steam & Water
— Adam Bingham —Analysis of Advanced Fuel Assemblies
And Core Designs for the Current and the Next Generations of LWR’s
(Light Water Reactors)
— Kevin Hogan —An Overview of Projects
Using a Simulation Model
—Zach Bailey —Nuclear Safety Program at
Texas A & M
— Ni Zhen —Analysis of VHTR
(Very High Temperature Reactor) Using Melcor
Other Team Members:
Scott Griffin from Bay City High School
Willie Smith from TideHaven High School
Working in Conjunction with the South Texas Project Nuclear Facility
What type of research is conducted?
Dr. Vierow’s students are working on the design of the cooling system for a nuclear
power facility.
Niki Williams’ experiment uses counter current flow with air and
water. The purpose of this experiment is to come up with possible scenarios that
will cause flooding to occur
and thus jeopardize the safety of the
nuclear facility.
The Data Acquisition System
Data Interpretation
What air or steam flow is necessary to cause a flooding situation?
The change in water pressure and the and the air or steam flow rates are what are
measured in this experiment.A constant water flow rate is selected for
each experiment. In the following data, The water rate flow was approximately
5 gal/min.
The next slide is an example of the number of data points that the Data Acquisition System will read out in just one second.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The date is read and generated using a computer program that takes over
200 readings per second and averages these together and the output data is
20 points per second. This gives us a good picture of what is
happening in the simulation.
485 31.92 5.042 53.821 14.574
485.1 31.99 5.043 53.899 14.576
485.2 32.012 5.043 53.898 14.574
485.3 32.083 5.043 53.895 14.574
485.4 32.163 5.045 54.003 14.574
485.5 32.252 5.045 54.177 14.575
485.6 32.317 5.047 54.35 14.574
485.7 32.456 5.048 54.452 14.575
485.8 32.408 5.048 54.468 14.575
485.9 32.503 5.049 54.432 14.575
486 32.548 5.051 54.401 14.574
Seconds Air Pressure Water Flow Δ Water Pr. Atm.Pr.
According to the following
data chart,
Can you see where flooding is possibly occurring?
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Make an educated guess!
Minutes/Seconds Air Pressure Δ Water Pressure
0.5 / 30 31.9 56.3 1.5 / 90 32.1 56.3 2.5 / 150 32.9 56.7 3.5 / 210 32.9 56.5 4.5 / 270 33.4 56.5 5.5 / 330 33.5 56.4 6.5 / 390 33.9 56.4 7.5 / 450 33.9 56.3 8.5 / 510 33.0 54.4 9.5 / 570 33.5 55.3
What would be your best guess?
The data that is collected will help in the
maintenance and the safety
protocols that are necessary to keep a nuclear
facility from experiencing any of these types of
occurrences.
Minutes/ Seconds
Air Pressure
Δ Water Pressure
0.5 / 30 31.9 56.3
1.5 / 90 32.1 56.3
2.5 / 150 32.9 56.7
3.5 / 210 32.9 56.5
4.5 / 270 33.4 56.5
5.5 / 330 33.5 56.4
6.5 / 390 33.9 56.4
7.5 / 450 33.9 56.3
8.5 / 510 33.0 54.4
9.5 / 570 33.5 55.3
31
32
33
34
35
36
37
0 100 200 300 400 500 600
Time [s]
Air
Vel
oci
ty [
m/s
]
50
51
52
53
54
55
56
57
DP
[in
wat
er]
Air Velocity
DP
Counter Current Flow Data Chart
As you can see from the graph, as flooding occurs, the water pressure suddenly drops.
According to the data, flooding occurred when the air velocity
was about 34.5 m/second. This happened during this experiment at
about 480 seconds or 8 minutes.If you look back at the data, you will
see a sharp decline in the water pressure at this point.
Safety is the # 1 Priority
We want the general population to have a safe environment,
especially those of us that live near a nuclear facility.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This research will also help in the design of future plants,
so that the safety of our communities will be maintained.
Applications in the
High School Classroom
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Set up a 10 gal. tank of water with three different size pipes coming out of the tank.
Students will learn about water flow and how it varies with the various dimensions
of pipe.
Equipment Needed
About a 10 gal water tank
8 ft piece of each of the following:
⅜ inch PVC
½ inch PVC¾ inch PVC
3 valves
PVC glue
During this lesson, the students will learn the following objectives:
(1) How changing dimensions affects the cross-sectional area and the volume of
the water in the pipe.
(2) How to calculate the water flow coming out a pipe by using the
Δ Amount of Water / Δ Time
Science teachers may also want to do a water conservation lesson along with this lesson on
water flow.I will probably spend about one week of classroom
time covering this material.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Day One: Pre-Test on Basic knowledgeDay Two: Do the Experiment
Day Three: Make Graphs & Discuss the DataDay Four: Have a class discussion about how water flow
relates to the safety of a nuclear plant.Day Five: Post Test to determine what the students
have learned.
In Conclusion,I would like to give a special THANKS all of
the people that made this presentation possible.TAMU
Our Team Leader: Dr. Karen VierowResearch Associate: Dr. Isaac Choutapalli Grad Student: Niki Williams All of the other grad students that presented
their work for us to view.
The National Science Foundation
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