Fuel Recipe Problem for Transition Scenarios

[jbae11]

Problem:

The deployment schedule of transition scenarios are currently heavily dependent
on the output recipe of Cycamore::Reactor. (How many LWRs are needed to start FRs, etc.)

A model fuel recipe for the transition scenarios are needed:

Scenarios	Type of Reactor (Conversion Ratio)	Burnup (Driver, Blanket, PWR)	Type of Input Fuel
eg23	Breeder (slightly over 1.0)	81.5 GWd/t, 23.5 GWd/t, (avg. 72.6 GWd/t)	Pu + rep.U
eg24	Breeder (slightly over 1.0)	73 GWD/t (no blanket)	TRU + rep. U
eg29	Breeder (~1.2), MOX PWR	97GWd/t, 21GWd/t, 50GWd/t	nat U, rep U, Pu // Pu + rep. U
eg30	Breeder (~1.2), MOX PWR	107 GWd/t, 23GWd/t, 50GWd/t	nat U, rep U, TRU // Pu + rep U

Note the only difference between 23/24 and 29/30 is the MOX PWR.

The input fuel and output fuel recipes have to be semi-compatible with the mixer facility.
i.e.)
The reprocessed Pu or TRU from spent fuel, and its mixture with dep U should
resemble the input fuel recipe closely. In short:
(Reprocessed Pu or TRU recipe)(ratio) + (dep U)(1-ratio) ~= input recipe

Solution:

Various solutions are available, some better than others

Weak:

use vision recipe and modify to fit need

Better:

Produce own recipe using depletion codes

Best:

Use Bright-lite, which would be better in the longer run to
demonstrate cyclus capabilities.

[katyhuff]

We will need to run an enormous number of simulations to generate necessary data to inform demand driven deployment models. The recipe reactor saves time per simulation over bright lite. For computing time reasons, therefore, I would not put these solutions in the same order. Good : fix existing, Better: use Bright-lite or CyBORG, Best: Produce your own recipes. Have you (@jbae11) been able to communicate with louis kissinger about his serpent model ? Ideally it and variations of it can be used to generate the recipes needed for the SFR type reactors at least.

…

On Sun, Jul 2, 2017 at 6:52 PM, Jin Whan Bae ***@***.***> wrote: Problem: The deployment schedule of transition scenarios are currently heavily dependent on the output recipe of Cycamore::Reactor. (How many LWRs are needed to start FRs, etc.) A model fuel recipe for the transition scenarios are needed: Scenarios Type of Reactor (Conversion Ratio) Type of Input Fuel eg23 Breeder (~1.2) Pu + dep.U eg24 Breeder (~1.2) TRU + dep.U eg29 Burner (~0.8) Pu + dep.U eg30 Burner (~0.8) TRU + dep.U The input fuel and output fuel recipes have to be semi-compatible with the mixer facility. i.e.) The reprocessed Pu or TRU from spent fuel, and its mixture with dep U should resemble the input fuel recipe closely. In short: (Reprocessed Pu or TRU recipe)(ratio) + (dep U)(1-ratio) ~= input recipe Solution: Various solutions are available, some better than others Weak: use vision recipe and modify to fit need Better: Produce own recipe using depletion codes Best: Use Bright-lite, which would be better in the longer run to demonstrate cyclus capabilities. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#45>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAYCq0My3BCaL3AY3m5-1Kx6U4iDwdBpks5sKC0-gaJpZM4OLugd> .

-- Kathryn Huff Assistant Professor Nuclear, Plasma, and Radiological Engineering University of Illinois at Urbana-Champaign kdhuff.web.engr.illinois.edu

[jbae11]

That makes sense. I will look into producing my own recipes.

Do you have Louis' contact information? I can't find him on slack or github. I guess I can work with him to find a recipe.

[katyhuff]

Please don't repeat work that is part of louis' summer proposal.

@lkissin2 on github
@lkissin2 on slack
[email protected] via email

[jbae11]

Okay thanks! I'll talk to him about it

[jbae11]

this PR

may offer a crude solution.

[jbae11]

According to Appendix B, the spent fuel compositions are grouped into four categories, and the Breeding ratio of Fast reactors in each scenario can be estimated.
The BR of SFRs are calculated by

BR = (UNF_'fissile'_composition) * (reprocessing_efficiency) /  (SFR_Fuel_Composition)

• EG23: 13.101*.998/12.9 = 1.0136
• EG24: 13.95*.998/13.78 = 1.0103
• EG29: 9.114*.998 / 7.05 = 1.29
• EG30: 12.3206*.998/11.655 = 1.055

The Breeding ratios are quite low to accumulate Pu or TRU to start up new reactors,
which prolongs the LWR-only period so that enough Pu inventories can be accumulated.
In the Orion analysis,
two things are done differently:

1. ORION does not decommission reactors mid-cycle, and waits until all cycles are finished, and the decommissioned reactor has a fully transmuted core (while CYCAMORE::REACTOR only transmutes half of core when decommissioned mid-cycle -> EDITED: This is needs to be checked).

2. In the power-increase scenario (1% annual energy demand increase case), the BR of the SFR is set to 1.2, which is higher than what is given in the E&S report Appendix B.

[jbae11]

A Weak Solution is offered in this repository.

This issue will be closed, but two new issues #50 #49 address the better and best solutions.