- Member since May 23rd 2017
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I have received some, but not lately...
Monthly, or for "special disclosures" would be OK with me.
I hope others have better luck but I can't connect to their website, on either of my 2 browsers. Maybe it's my VPN?
With all due respect to my friends Alan and Alan above, according to my TIG instructor and my own personal experience, TIG welding stainless is relatively easy compared to mild steel, and far easier than aluminum. Note I said "relatively".
TIG is by far the best welding method for this use as compared to wire feed, stick or gas. There may be better methods beyond the financial means of small shop welding, but I don't know about them. Disclaimer: I haven't welded pressure/vacuum vessels. (but I suspect it's in my near future...)
(Edit: OK I have, but that was rough, overbuilt and explosion proof, not precision work)
The key (as always) is cleanliness. TIG is inherently clean but never use the same cleaning tools (wire brushes, wipes etc) with any other materials. Keep Acetone handy and keep your filler rod pristine. Never let anything that will touch the weld area touch anything else after cleaning.
“There can be only one”
(please forgive the Highlander quote)
Regarding the replication of Mizuno’s R20, I understand that Jed and Mizuno (both whom have my greatest respect) wish for this to be replicated. I do too. I feel it is appropriate to prove this technology to mankind.
As I understand the meaning of “replication” in this context, more information will need to be released before replicators can even start.
There are those who have stated that they are doing a replication; however, I question how they will do so. If they are willing to do something similar to R20, I encourage them to do so, and truly wish them the best, but a replication it won’t be.
The list of questions I have are here:
I will update that page with any further information I receive, with hopes we, the CF community, get enough to do a real replication.
if reactor is different recently Mizuno would have said so
go with 316 ss
ID =10,8 cm
Maybe this is from local Sapporo machine shop.
+/0,5 cm shouldn't make a difference
Important ..thing ... the mesh is on inside in close contact with wall
With all due respect; I'm just trying to get to the bottom of this...
Am I correct that you are referring to this paper?
If so, you are referring to an entirely different reactor design. I suspect this 2017 reactor wasn't melted down and R20 made from the melt.
Therefore without it being specifically mentioned by TM, the grade of SS is a guess or an assumption.
Am I being too picky? Is the term "replication" some loosey goosey approximation of an original?
"shouldn't make a difference" is not a phrase I would consider part of a replication plan
I suspect (but don't know) TM used a speciality vacuum manufacturer, probably international, to make the R20. Unless he has a brother in law in the welding biz, it would likely be cheaper (TM is price sensitive). If so, he probably bought a close to off the shelf assembly, or he sent a set of drawings and specs to a manufacturer/welder.
The basic Reactor Vessel is constructed as follows:
Take a piece of 24” Stainless Steel tubing with a 4” diameter and place two Bored Conflat Flanges, CF 6”, Bored 4”, tapped holes. Weld them in place.
Standard practice is to polish all the welds and then pickle such fabrications in (most recently) strong and hot citric acid, rinse them off with deionized water and check for leaks at the designed operating temperature.
Source of 24" x 4" stainless steel pipe:
Source of Conflat Flanges:
1. This is a Conflat flange bored for a 4" pipe. It is tapped so that the untapped flange can screw on easily without the need for nuts.
2. Its mate would be untapped flange that is not bored:
The unbored flanges need to be bored to fit the vacuum access and heater unit.
The bolts needed are Fine Threaded Hex Cap Screws, 5/16-24 x 1-½.
Versions of these items are also available with Metric screws. https://www.lesker.com/
F0600X412NM FLANGE,UHV,SS,BORED,FXD,6"OD, 4.114"C-BORE,M8 X 1.25 TPD HLS $176.90
There are 16 bolt holes.
The blank flanges are $77.14 each
The bored flanges are $82.65 each.
The 4" Seamless Pipe Schedule 10s, Stainless Steel 304/304L ASTM A312 ASME SA312 is $99.25
https://www.alliedelec.com/product/rs-pro/8606883/70658451/ are the heaters and they are $13.14 each
For a total of $445.11 each unit. Add in the cost of the nickel mesh and the Palladium and you have the cost of one unit in production.
Obviously production designs will be less expensive, but if this unit works, it will be like the first airplane...
I have also been in contact with vacuum vessel manufacturers. Rather than weld the CF flanges to the tubing myself, I have asked for quotes (from 3 manufacturers) for the finished assembly (generally known as a "nipple") plus the supply of the end plates and copper seals. None of the manufacturers match the OD of the tubing stated in Jed's doc as 114mm. Building high vacuum bits is a specialty work. Just because I can TIG weld doesn't mean I can make a suitable reactor (although I might try sometime). My concern is that the dimensions don't work out to agree with the doc. So, are we going to get clear and exact details of Mizuno's work to replicate, or are we all going to try something similar?
I am interested in the Mizuno experiment but concerned that similar experiments are being called replications.
I don't know if I will be working with others to do a replication, but I can't afford to do it on my own. Perhaps I can do something similar as more info comes out...
Homebrewers use stainless. An alternative for reactor construction uses their materials.
I have found caps, clamps, and spool tubes of appropriate sizes and alloy.
I genuinely wish you the best of luck with this.
My concern is how well this type of assembly will hold a hard vacuum and how you will provide such a vacuum economically.
If you pull it off with positive results, I wish to be one of your first replicators...
Why are there 4 layers at each end of the cylinder of R20? I would assume 2 would be sufficient to close off the cylinder.
You are counting grooves as well as separation points
Yes, the anti-Nuke crowd is pretty silly. Although they were a lot more right than I realized before Fukushima.
I recall MRI machines used to be called nuclear magnetic resonance imaging machines (NMRI). They changed the name to avoid upsetting ignorant people.
To echo your statement above, I was in a position of local authority in the 80's when we had a group approach us hoping to get us to declare our area as a "Nuclear Free Zone". After their short and hopeful presentation, wherein all the other officials were nodding their heads in approval, I asked if they had approached the local hospital for their willingness to exclude some of their fancy new equipment; the fire departments for the safety of the population without smoke detectors; all levels of government to handle the removal of residents and tourists with implants to fight their tumors, as well as screening all tourists and other transients.
Crickets. Crestfallen faces.
Once I had let it sink in for effect, I offered that if we rename their requested Declaration to Nuclear Weapons Free Zone, I would support it. However we still wouldn't have the authority for banning the Navy (ours or American) from tying up at our docks or cruising to the test ranges nearby...
I want to thank Ruby for inviting us to contribute musical linx, and I want to thank all the contributors who did so.
An awesome evening of entertainment...
I am aligned with picasso's post.
I suspect that my personal timeline will expire before transmutations affect precious metals values.
I do, however, hope and expect the complete destruction of oil/coal based energy production (and the corruption therein) due to LENR.
Hopefully I will get to see this.