INL - Grinder Water Circulation and Filtering System

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Sponsor Idaho National Laboratory
Advisor Dr. Matthew Swenson
Duration Fall 2017 - Spring 2018
Mentor Alex Olson
Team Name Keep It Clean
Students
  • Drew Fagan
  • Jerry Kahn
  • Thomas Moore
  • Troy Sanders

Idaho National Laboratory (INL) has reached out to the University of Idaho to completely re-design and test a water filtration system that is to be used in a hot-cell environment. Our team is working closely with the staff here at U of I and with INL to ensure that develop a system that meets all of the specific requirements. We will be updating the information on this page monthly until it is finalized in May of 2018, where we will then hope to share the success of our project.


Project Definition[edit]

Problem Statement[edit]

The current INL hot cell grinder filtration system does not efficiently remove particle build up in the water storage tank making it harder to clean and creates clogging of the pipes.


Mission Statement[edit]

To completely re-design and build a working prototype for the INL hot cell grinder filtration system to meet the client’s specifications. We will design a system where the collection of muck in the water tank is minimized, create a more efficient flow in the filtration system, and apply a cheaper filter and pump to the system. We strive to provide the best possible product to our client.


Specifications[edit]

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Schedule[edit]

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Budget[edit]

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Project Learning[edit]

Filter Project Learning[edit]

Image Description
Filter 1.jpg This was the initial design concept that we had in mind when trying to develop a new filtering system for the water circulation system. Overall this was a really great design and it had a lot of potential, but when it was first presented to our client we realized we needed to implement 2 different types of filters. A rough filter to collect larger particles, and fine filter to collect the rest of the particles as needed.
Filter 2.jpg The second design that we made seemed to be very innovative, and it proved to be more complicated than needed. Though this design met our new constraint of needing a rough and fine filter, it didn’t provide an easy option for cleaning the system out when it came time to replace or unclog the filter. As you can see these filters worked in parallel, and that would allow the flow to exit through the rough filter and then collect particles on the outside of the fine filter. Collecting particles on the outside is where the problem lies with this design. When changing out these filters we want all of the particles to be taken out as well.
Filter 3.jpg This design is our final design and overall what we will manufacture by the end of this course. This design is simple and it consists of a design similar to our initial design but with a rough filter that fits inside of the fine filter. Our only problem with it currently is that it is hard to find filters that meet our specs, and that fit inside of each other as we have displayed. The only other problem that we have had with this design is that it would be harder to replace these filters in the environment because it would take twice as long to replace both of the filters.



Tank Project Learning[edit]

Image Description
Tank 1.png Our initial thoughts with this design was that we would maintain a system similar to the current system and have the pump and filter on far sides from one another. Our intentions were also to allow the filter to drain straight into the tank in order to eliminate some tubing in our system. It also seemed to be the best option to accommodate the pump that we decided on using for the system and would put any particulate under the pump meaning cleaning would be even more simplified.
Tank 2.png This was a similar idea to the first with the idea of having a space where particulate could accumulate if it did make it into the tank. However, it was not really a good fit with the pump we were choosing since we needed a larger clearance for the pump, and if we centered the pump it would interfere with other components to the system.
Tank 3.png This was an idea that I came up with after the first snapshot day because some students suggested a spherical tank design. The half cylinder would also make it so any particulate in the tank would go the bottom of the curve to make cleaning simple. In order to meet the volume goal we had set it would require this tank to be pretty long and if we wanted to make it any deeper we would have to add a section of straight wall. Which made this design undesirable for us.
Tank 4.png Like the half cylinder the idea for this half pill shape was a result of the first snapshot day. Just like the half cylinder it would cause any particulate in the tank to accumulate at the bottom of the curve. However, the addition of the quarter spheres on the ends would eliminate the edge at the end for particulate to get stuck in. For this design to meet the length constraints it would require a section of straight walls before the half pill though since it would basically be the full length of the system otherwise. Meaning this was a less than ideal design for our system.



Pump Project Learning[edit]

Image Description
Pump 1.png This pump from Bell and Gossett was the first pump that we considered. The head produced from this pump is satisfactory for the desired volumetric flow rate. However, our team was concerned that the materials of this pump would not be able to hand the environment of the hot cell. In addition, mounting and tubing integration would be a significant challenge with this pump. As a result, we disqualified this pump as an option for our system.
Pump 2.png This was the ideal pump given the head and volumetric flow rate requirements. At 1/5 gallons per minute we would receive 6 feet of head. In addition, all the materials are confirmed to withstand the radioactive environment. The downside to this pump is that the discharge port is only capable of a slip-on connection. This automatically disqualifies this pump as we cannot crimp stainless steel tubing onto the discharge port.
Pump 3.png This was our second choice of pumps. The benefits of this pump is that the materials are confirmed to withstand the radioactive environment. Also, the shaft length of this pump is compatible with our desired tank design. The disadvantage of this pump is that at 1/5 gallons per minute, the pump produces 16 feet of head. We can overcome this obstacle by placing valves in the tubing system. If that is not a viable solution, we can purchase a smaller impeller from Graymills.



Final Integration Design[edit]

FULL DESIGN INL.png

FINAL DESIGN

This is the final integration design with all the placing of the components. The design is incomplete as it does not have finalized fittings on the pump or the filter to hold them in place. However, this design is elegant, easy to manufacture, and completes all the design tasks we need to reach the client’s needs. This design places the filer before the pump, much like the other designs, but does not have the bypass going into the filter. The filer will run completely gravity fed into a slanted tank as opposed to the flat tank of the other designs. The pump is places on the other end of the table at the end of the tank and pumps out into minimal tubing which allows for lower head loss. There is a T-joint at the maximum height constraint that allows for two values to be places on the ends of the T-joint. These values are for controlling the flow onto the grinder and creating a bypass tube for excess flow from the pump. This design is what we decided to be the best design to pursue moving forward.



Team Information[edit]

Biography Discipline
Drew Fagan
Drew.png

Drew Fagan is a senior in mechanical engineering at the University of Idaho. His interests include vibration and acoustic analysis. He hopes to continue his knowledge in these areas with the Naval Surface Warfare center to try to help the submarine fleet stay undetected in dangerous waters.

Mechanical Engineering.
Jerry Kahn
Jerry.JPG

Jerry Kahn is a senior in mechanical engineering at the University of Idaho. His interests are in design and nuclear power. Currently, his goals are to work in industry for a few years then return to school for nuclear engineering.

Mechanical Engineering
Thomas Moore
Thomas.JPG

Thomas Moore is a senior in Mechanical Engineering at the University of Idaho. He is interested in machining and design, and hopes to work in a fast pace atmosphere after school. His current goal is to work in the field for a few years before returning to school to work towards being a professor.

Mechanical Engineering
Troy Sanders
Troy.JPG

Troy Sanders is a senior in Mechanical Engineering at the University of Idaho. His interests include design work and piping and HVAC systems. He is passionate about roller coasters and hopes to one day design roller coasters or work on hydraulic launch systems for roller coasters.

Mechanical Engineering