23. Solving the Neutron Diffusion Equation, and Criticality Relations

[@mitocw]

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[@Torrtobak]

I really dont understand much about these lectures but somehow I really enjoy them. I admire you smart people!

[@ifiig8220]

as a nuclear reactor operator in training i enjoy the content. though our flux calculations are done by our reactor engineers and they relay to us the depth in which they want us to put the control rods into the vessel still none the less having a vague understanding of how they do their job is nice. good quality content.

[@randallmcgrath9345]

I would love to see this lecturer lecture on literally any subject, let alone Nuclear eng

[@turkergoktas777]

I genuinly like how he pauses and make class to think about solutions.Also notations are not complicated like in textbooks.

[@shikshokio1]

The power of the reactor doesn’t come (mainly) from the kinetic energy of the neutrons. It (mainly) comes from the kinetic energy of the fission products.

[@samgdotson]

This is a really excellent lecture! Great review for the qualifying exam

[@barryfennell9723]

Symetrye of light contradicts the complexities of chemical equilibrium.How do we time travel in physical?

[@shikshokio1]

The average cosine of scattering angle (miu) is 2/(3A), and not 2*A/3.

[@brainstormingsharing1309]

Absolutely well done and definitely keep it up!!! 👍👍👍👍👍

[@morganrogers196]

Around 38:03, when plugging in phi thermal to the fast equation, there is a sigma scattering from fast to thermal in the loss section that he doesn't bring down.... don't understand why that wasn't carried down? Did I miss what he did with it?

[@morganrogers196]

OMG BLEEEESSS these students for asking questions! A girl asked that same question at 40:17, and he added the term back in. phew.

[@MisterTutor2010]

This lecture is a blast :)

[@shohmirzoumarov299]

Great lecturer!

[@peppapig9640]

Im working on a neutron diffusion question, could u help me with that? Alright so I'm trying to model the neutron population after a ramp change in reactivity to simulate rod insertion and I know how to modify the 1/2 the point kinetics equations but I was wondering how you can find the vectors to use in the solution to the differential equations

[@mutiur7396]

Control rod is inserted in steps. Which vectors in differential equation?

[@muhammadfaridkhandaq4379]

why did u add k in fast, but non in thermal? (min: 32:20)

[@yacinebelhadj9749]

neutron are born fast only

[@larissapinheiro8236]

@@yacinebelhadj9749 actually that is not quite correct. Neutrons have a birth spectrum that range from a very low energy (highly improbable) to very high energies around 10 MeV. The average energy in which neutrons are born is fast.

[@baqermohammadi4409]

Great!

[@isbestlizard]

Hmm this is a lot of maths... I think my mindset is definitely just grid it and step through time to solve it. I know maths people think of 'solving' as finding a function that fits some DE's and boundary condition but 'solving' for me means find a way to make a computer tell me what'll happen

[@mutiur7396]

No we need these before numerical solutions..

[@smellypatel5272]

I'm studying medicine. Why am I watching this video that is frying my brain?

[@Zalenskiii]

i'm just a mediocre accountant

[@smellypatel5272]

@@Zalenskiii are we masochists? Do you understand any of this? Because I'm lost lol

[@Zalenskiii]

@@smellypatel5272 no but my GF is in life sciences (cancer research) and I enjoy reading that too lol

[@NAC4U]

because you like to learn

[@VeteranVandal]

Well, when they derive and simplify the neutron diffusion equation things are a lot messier.

[@superflyKi]

Bro what 😮

[@hamzaa.8082]

Come on, too small to see!