DFD

Big Brain Bradley wrote:

4zilch wrote:Watched new NOVA (PBS) episode on nuke power last night. 5/7 very informative.

Summary:
Fukushima is a complete shit show and will continue to be for a very long time
Regulations hamper new reactor design/tech
Sodium cooled reactors seem like a viable option vs. water cooled.
Millennial nuke engineers are a thing

Name of show?

Sodium cooled reactors are not terrible if we can use the braton cycle. Otherwise... you need another heat transfer fluid besides water. Sodium + water = bad day

Yeah they mentioned the sodium + water = bad (duh)

Show is NOVA - Episode: "The Nuclear Option". http://www.pbs.org/video/2365930275/

Could such a thing ever lead to small-scale power generation? Say instead of a substation delving power out to a neighborhood, one of these things cranking?

Detroit wrote:Could such a thing ever lead to small-scale power generation? Say instead of a substation delving power out to a neighborhood, one of these things cranking?

IDK, its got to be licenced forst, and then the NIMBY types will come out the woodworks

http://www.nextbigfuture.com/2017/01/te ... clear.html

MSR in 2019?

So it sounds like fuel has escaped the reactor vessel and spiked radiation levels. I guess the question is how well is the containment building shielding the environment from radiation.

http://www.forbes.com/sites/williampent ... 46702f3381

4zilch wrote:So it sounds like fuel has escaped the reactor vessel and spiked radiation levels. I guess the question is how well is the containment building shielding the environment from radiation.

http://www.forbes.com/sites/williampent ... 46702f3381

I read this too. I'd want to be near one of these plants.

4zilch wrote: ↑Sun Feb 05, 2017 8:18 am So it sounds like fuel has escaped the reactor vessel and spiked radiation levels. I guess the question is how well is the containment building shielding the environment from radiation.

http://www.forbes.com/sites/williampent ... 46702f3381

eh, that happened in the incident, this should not be a huge surprise.

The containment worked, even if melted fuel, or coreium, made it outside the pressure vessel, it stopped.

Big Brain Bradley wrote: ↑Wed Jan 25, 2017 9:45 am http://www.nextbigfuture.com/2017/01/te ... clear.html

MSR in 2019?

Later designs should be able to get lower than 1 cent per kWh
Design is walk away safe with passive safety systems
First designs would produce 6 times less nuclear waste and later designs can close the fuel cycle



also, didn't see where they are building?? But in 2 years to break ground??!

This was the post of the day.



i literally feel less about our future. I mean, if china got there first, such embarrassment. Then they'd get their moon base.

dubshow wrote: ↑Mon Feb 06, 2017 8:38 am

Big Brain Bradley wrote: ↑Wed Jan 25, 2017 9:45 am http://www.nextbigfuture.com/2017/01/te ... clear.html

MSR in 2019?

Later designs should be able to get lower than 1 cent per kWh
Design is walk away safe with passive safety systems
First designs would produce 6 times less nuclear waste and later designs can close the fuel cycle



also, didn't see where they are building?? But in 2 years to break ground??!

2 years to licensure approval, hopefully break ground soon after.

I think itd have to be at one of the existing nuke sites, Aragone, or oak ridge.

http://finance.yahoo.com/news/toshiba-a ... ector.html

dang, thats not good at all.

Big Brain Bradley wrote: ↑Wed Mar 29, 2017 7:04 am http://finance.yahoo.com/news/toshiba-a ... ector.html

dang, thats not good at all.

Who else makes reactors in the U.S. ?

Melon wrote: ↑Wed Mar 29, 2017 7:44 am

Big Brain Bradley wrote: ↑Wed Mar 29, 2017 7:04 am http://finance.yahoo.com/news/toshiba-a ... ector.html

dang, thats not good at all.

Who else makes reactors in the U.S. ?

well, technically no one makes the commercial reactors and steam generators for PWR's in the US. the only place with a foundry big enough is in Japan.

But the two big interests in old light water reactors are Toshiba-Westinghouse and GE-Hitachi (GEH). Westinghouse did PWR's, GEH did the BWR's.

Japan took our foundry jerbs.

Japan eh... Dat nuclear experience...

max225 wrote: ↑Wed Mar 29, 2017 2:23 pm Japan eh... Dat nuclear experience...

tech we sold them.

I'm pretty sure i did a writeup on 1.0 about what went wrong at fukushima, I don't feel like typing it again. It was 100% human error and not a design flaw.

Big Brain Bradley wrote: ↑Wed Mar 29, 2017 2:37 pm

max225 wrote: ↑Wed Mar 29, 2017 2:23 pm Japan eh... Dat nuclear experience...

tech we sold them.

I'm pretty sure i did a writeup on 1.0 about what went wrong at fukushima, I don't feel like typing it again. It was 100% human error and not a design flaw.

Shouldn't the design call for redundancies that make humans obsolete.

max225 wrote: ↑Wed Mar 29, 2017 2:38 pm

Big Brain Bradley wrote: ↑Wed Mar 29, 2017 2:37 pm

tech we sold them.

I'm pretty sure i did a writeup on 1.0 about what went wrong at fukushima, I don't feel like typing it again. It was 100% human error and not a design flaw.

Shouldn't the design call for redundancies that make humans obsolete.

it does to an extent, but at the state of the art in the 1950's they did the best they could. They will largely take care of themselves if humans stay out the way, AND THEY HAVE POWER. Fucshmia was a 'station blackout' during a 'severe event' which is a very rare scenario.

Both TMI and chernobyl (a fundamentally bad design, but i digress) happened because we didnt let the safety systems do their jobs.

Chernobyl was a whole different issue all together... Lets run a quick test to see how hot we can get this bad boy.

max225 wrote: ↑Wed Mar 29, 2017 2:49 pm Chernobyl was a whole different issue all together... Lets run a quick test to see how hot we can get this bad boy.

they more or less run a constant temp. Pressure is regulated, temp follows pressure, flow controls power.


Chernobyl was a bad design. The act of pushing the control rods in during a SCRAM momentarly INCREASES reactor power.

so they had the rods a long way out in this low power, low flow condition, then they shove them ALL THE WAY in, reactor power spikes, not enough heat capacity in the water to absorb that power, pressure spiked, steam explosion, rest is history.

http://www.latimes.com/business/hiltzik ... story.html

Something wrong in the condenser. Not good.

Big Brain Bradley wrote: ↑Tue May 09, 2017 9:05 am http://www.latimes.com/business/hiltzik ... story.html

Something wrong in the condenser. Not good.

prolly a manufacturer error. Still a black eye

Big Brain Bradley wrote: ↑Tue May 09, 2017 9:05 am http://www.latimes.com/business/hiltzik ... story.html

Something wrong in the condenser. Not good.

15 times the original cost??