Divertor monoblock sensitivity #280

nsnowISU · 2025-07-31T22:03:21Z

Addition of Divertor Monoblock Sensitivity inputs to the examples folder and the tests folder.

…ex.md for the examples folder. Additionally including inputs in tests folder along with output json files for use as 'golds'. Also adding graphical resources and relavent python scripts

simopier · 2025-07-31T22:16:40Z

@ke7kto

(closes idaholab#281)

…k. Partially adjusted documentation

ke7kto · 2025-08-01T00:36:45Z

I'm not able to reproduce the results of the gold files. I'll fiddle with it a bit more tomorrow.

moosebuild · 2025-08-01T04:15:39Z

Job Documentation, step Sync to remote on 53ae10d wanted to post the following:

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moosebuild · 2025-08-01T04:31:15Z

Job Coverage, step Generate coverage on 53ae10d wanted to post the following:

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…k. Partially adjusted documentation. Changed tests information

… the latter will work with mathtext and latex without errors (\text requires latex)

…ertor monoblock

… of time

moosebuild · 2025-10-15T11:31:48Z

Job Documentation on 53ae10d : invalidated by @simopier

restarting documentation since it is now too old

simopier

Thank you for cleaning a lot of this up, @ke7kto! I added some comments throughout on things to do and keep track of as this gets finalized. Also, here are the current heavy test errors.

test:divertor_monoblock.stochastics/steady_run: Tester failed, reason: MISSING GOLD FILE
test:divertor_monoblock.stochastics/shutdown_run: Tester failed, reason: SCHEMADIFF
test:divertor_monoblock.stochastics/elm_run: Tester failed, reason: SCHEMADIFF

simopier · 2025-10-15T11:30:48Z

doc/content/bib/tmap8.bib

 }

+@article{ELMORSHEDY2024101616,
+title = {Thermal-hydraulic simulation of ITER tungsten divertor monoblock for loss of flow transient},


Suggested change

title = {Thermal-hydraulic simulation of ITER tungsten divertor monoblock for loss of flow transient},

title = {{Thermal-hydraulic simulation of ITER tungsten divertor monoblock for loss of flow transient}},

simopier · 2025-10-15T11:38:50Z

doc/content/bib/tmap8.bib

+
+@article{Kessel01092013,
+author = {C. E. Kessel and M. S. Tillack and J. P. Blanchard},
+title = {The Evaluation of the Heat Loading from Steady, Transient and Off-Normal Conditions in ARIES Power Plants},


Suggested change

title = {The Evaluation of the Heat Loading from Steady, Transient and Off-Normal Conditions in ARIES Power Plants},

title = {{The Evaluation of the Heat Loading from Steady, Transient and Off-Normal Conditions in ARIES Power Plants}},

simopier · 2025-10-15T11:41:04Z

doc/content/examples/divertor_monoblock/index.md

 !alert warning title=The exodus file in `gold` is a smaller version of the output
 The input file [/divertor_monoblock.i] returns the outputs that were used in [!cite](Shimada2024114438). However, a slightly modified version of this input is run in [/divertor_monoblock/tests] as part of TMAP8's [Software Quality Assurance](sqa/index.md exact=True) process: It simulates only one pulse cycle, has a coarser mesh, and outputs the results less regularly to limit the file size. As a result, the exodus file in the test `gold` directory is a smaller version of the output generated when running the full input file.

+A sensitivity study on material properties has [also been demonstrated](examples/divertor_monoblock/sensitivity.md exact=True).


Suggested change

A sensitivity study on material properties has [also been demonstrated](examples/divertor_monoblock/sensitivity.md exact=True).

Note that the current model has been utilized in a follow up study to perform a sensitivity study on material properties and operation conditions, for which the documentation is available [here](examples/divertor_monoblock/sensitivity.md exact=True).

simopier · 2025-10-15T11:43:44Z

doc/content/examples/divertor_monoblock/sensitivity.md

@@ -0,0 +1,123 @@
+# Divertor Monoblock Sensitivities 
+
+This work consists of sensitivity studies of different operating conditions performed on the [Divertor Monoblock](https://mooseframework.inl.gov/TMAP8/examples/divertor_monoblock/index.html). The original pulsed operation of the divertor monoblock model was modified according to [!cite](Hodille2021126003) towards a single-long tritium and heat flux pulse of an approximate equivalent total fluence. An initial sensitivity study on was performed on the divertor monoblock's boundary conditions under the steady pulse condition using the [Sobol Method](https://mooseframework.inl.gov/modules/stochastic_tools/examples/sobol.html) and other tools within the [Stochastic Tools Module](https://mooseframework.inl.gov/modules/stochastic_tools/). Two additional sensitivity studies were performed on select transients obtained from [!cite](ELMORSHEDY2024101616) and [!cite](Kessel01092013).


Suggested change

This work consists of sensitivity studies of different operating conditions performed on the [Divertor Monoblock](https://mooseframework.inl.gov/TMAP8/examples/divertor_monoblock/index.html). The original pulsed operation of the divertor monoblock model was modified according to [!cite](Hodille2021126003) towards a single-long tritium and heat flux pulse of an approximate equivalent total fluence. An initial sensitivity study on was performed on the divertor monoblock's boundary conditions under the steady pulse condition using the [Sobol Method](https://mooseframework.inl.gov/modules/stochastic_tools/examples/sobol.html) and other tools within the [Stochastic Tools Module](https://mooseframework.inl.gov/modules/stochastic_tools/). Two additional sensitivity studies were performed on select transients obtained from [!cite](ELMORSHEDY2024101616) and [!cite](Kessel01092013).

This page documents sensitivity studies of different operating conditions performed on the [Divertor Monoblock](examples/divertor_monoblock/index.md). The original pulsed operation of the divertor monoblock model was modified according to [!cite](Hodille2021126003) towards a single-long tritium and heat flux pulse of an approximate equivalent total fluence. An initial sensitivity study on was performed on the divertor monoblock's boundary conditions under the steady pulse condition using the [Sobol Method](https://mooseframework.inl.gov/modules/stochastic_tools/examples/sobol.html) and other tools within the [Stochastic Tools Module](https://mooseframework.inl.gov/modules/stochastic_tools/). Two additional sensitivity studies were performed on select transients obtained from [!cite](ELMORSHEDY2024101616) and [!cite](Kessel01092013).

simopier · 2025-10-15T11:50:19Z

doc/content/examples/divertor_monoblock/sensitivity.md

+!style halign=left
+Many fusion components, especially those exposed to especially unique or extreme conditions, often lack sufficient operation data to evaluate their reliability, availability, maintainability, and inspectability (RAMI). As a proof-of-concept, we seek to  construct a Probabilistic Physics of Failure (PPoF) model of a tokomak divertor system to obtain failure rate metrics and lifetime metric relevant to the RAMI of a nuclear fusion reactor.
+
+To accomplish this, sensitivity studies on the [Divertor Monoblock](https://mooseframework.inl.gov/TMAP8/examples/divertor_monoblock/index.html) model described in [!cite](Shimada2024114438) will be performed for (1) steady state conditions based on ITER data [!cite](Hodille2021126003), (2) an inadvertant shutdown transient [!cite](ELMORSHEDY2024101616), and (3) an edge-localized mode transient [!cite](Kessel01092013). The sensitivity studies will be performed using the [MOOSE](https://mooseframework.inl.gov/) Stochastic Module and its Sobol Method according to [!cite](SALTELLI2002280). The results of the sensitivity studies will be evaluated for state limits associated with heat transfer and tritium migration physics included in the [Divertor Monoblock](https://mooseframework.inl.gov/TMAP8/examples/divertor_monoblock/index.html).


Suggested change

To accomplish this, sensitivity studies on the [Divertor Monoblock](https://mooseframework.inl.gov/TMAP8/examples/divertor_monoblock/index.html) model described in [!cite](Shimada2024114438) will be performed for (1) steady state conditions based on ITER data [!cite](Hodille2021126003), (2) an inadvertant shutdown transient [!cite](ELMORSHEDY2024101616), and (3) an edge-localized mode transient [!cite](Kessel01092013). The sensitivity studies will be performed using the [MOOSE](https://mooseframework.inl.gov/) Stochastic Module and its Sobol Method according to [!cite](SALTELLI2002280). The results of the sensitivity studies will be evaluated for state limits associated with heat transfer and tritium migration physics included in the [Divertor Monoblock](https://mooseframework.inl.gov/TMAP8/examples/divertor_monoblock/index.html).

To accomplish this, sensitivity studies on the [Divertor Monoblock](examples/divertor_monoblock/index.md) model described in [!cite](Shimada2024114438) is performed for (1) steady state conditions based on ITER data [!cite](Hodille2021126003), (2) an inadvertent shutdown transient [!cite](ELMORSHEDY2024101616), and (3) an edge-localized mode transient [!cite](Kessel01092013). The sensitivity studies is performed using the [MOOSE](https://mooseframework.inl.gov/) [Stochastic Tools Module](modules/stochastic_tools/index.md) and its Sobol Method according to [!cite](SALTELLI2002280). The results of the sensitivity studies will be evaluated for state limits associated with heat transfer and tritium migration physics included in the [Divertor Monoblock](examples/divertor_monoblock/index.md).

simopier · 2025-10-15T14:29:54Z

test/tests/divertor_monoblock/elm_transient_sobol.i

+    mean =  1147e6
+    standard_deviation = 57.35e6
+  []
+  [P_dur]
+    type = Normal
+    mean =  1.32e-3
+    standard_deviation = 0.066e-3
+  []
+  [C_tem]
+    type = Normal
+    mean =  552
+    standard_deviation = 27.6
+  []
+  [W_cond]
+    type = Uniform
+    lower_bound = 0.9
+    upper_bound = 1.0
+  []
+[]
+[Samplers] # Sampling methodology using the probability distributions above
+  [hypercube_1]
+    type = LatinHypercube
+    distributions = 'P_val P_dur C_tem W_cond'
+    num_rows = 10 # N Samples
+    seed = 1001
+    execute_on = 'PRE_MULTIAPP_SETUP'
+  []
+  [hypercube_2]
+    type = LatinHypercube
+    distributions = 'P_val P_dur C_tem W_cond'
+    num_rows = 10 # N Samples
+    seed = 1002


i would recommend defining these numbers at the top of the input file with units.

simopier · 2025-10-15T14:30:40Z

test/tests/divertor_monoblock/shutdown_transient_runner.i

There is a lot of overlap with the divertor monoblock input file. I think this should leverage the !include capability and only contain the new elements.

simopier · 2025-10-15T14:31:02Z

test/tests/divertor_monoblock/shutdown_transient_sobol.i

+    mean =  2e7
+    standard_deviation = 1e6
+  []
+  [P_dur]
+    type = Normal
+    mean =  1
+    standard_deviation = 0.05
+  []
+  [C_tem]
+    type = Normal
+    mean =  552
+    standard_deviation = 27.6
+  []
+  [W_cond]
+    type = Uniform
+    lower_bound = 0.9
+    upper_bound = 1.0
+  []
+[]
+[Samplers] # Sampling methodology using the probability distributions above
+  [hypercube_1]
+    type = LatinHypercube
+    distributions = 'P_val P_dur C_tem W_cond'
+    num_rows = 10 # N Samples
+    seed = 1001
+    execute_on = 'PRE_MULTIAPP_SETUP'
+  []
+  [hypercube_2]
+    type = LatinHypercube
+    distributions = 'P_val P_dur C_tem W_cond'
+    num_rows = 10 # N Samples
+    seed = 1002


Move numbers to the top and add units

simopier · 2025-10-15T14:31:23Z

test/tests/divertor_monoblock/steady_state_runner.i

There is a lot of overlap with the divertor monoblock input file. I think this should leverage the !include capability and only contain the new elements.

simopier · 2025-10-15T14:31:48Z

test/tests/divertor_monoblock/steady_state_sobol.i

+    lower_bound =  9.5e6
+    upper_bound = 10.5e6
+  []
+  [C_top]
+    type = Uniform
+    lower_bound = 7.505e-13
+    upper_bound = 8.295e-13
+  []
+  [H_bot]
+    type = Uniform
+    lower_bound = 524.4
+    upper_bound = 579.6
+  []
+[]
+[Samplers] # Sampling methodology using the probability distributions above
+  [hypercube_1]
+    type = LatinHypercube
+    distributions = 'H_top C_top H_bot'
+    num_rows = 10 # N Samples
+    seed = 1001
+    execute_on = 'PRE_MULTIAPP_SETUP'
+  []
+  [hypercube_2]
+    type = LatinHypercube
+    distributions = 'H_top C_top H_bot'
+    num_rows = 10 # N Samples
+    seed = 1002


Move numbers to the top and use units.

simopier

Thank you for cleaning a lot of this up, @ke7kto! I added some comments throughout on things to do and keep track of as this gets finalized. Also, here are the current heavy test errors.

test:divertor_monoblock.stochastics/steady_run: Tester failed, reason: MISSING GOLD FILE
test:divertor_monoblock.stochastics/shutdown_run: Tester failed, reason: SCHEMADIFF
test:divertor_monoblock.stochastics/elm_run: Tester failed, reason: SCHEMADIFF

nsnowISU added 2 commits July 31, 2025 10:37

Test and bib update

9f6e98e

Adding in-progress index.md for the sensitivity, and the modified ind…

879dab3

…ex.md for the examples folder. Additionally including inputs in tests folder along with output json files for use as 'golds'. Also adding graphical resources and relavent python scripts

Fixed trailing whitespaces in committed files

5de87a6

(closes idaholab#281)

simopier self-assigned this Jul 31, 2025

simopier added the V&V Relevant to V&V label Jul 31, 2025

Moved sensitivity analysis into the same folder as the basic monobloc…

982cf08

…k. Partially adjusted documentation

ke7kto added 5 commits September 18, 2025 14:53

Moved sensitivity analysis into the same folder as the basic monobloc…

e51dea2

…k. Partially adjusted documentation. Changed tests information

Modified documentation to address errors. Changed \text to \mathrm as…

66860ad

… the latter will work with mathtext and latex without errors (\text requires latex)

Merge branch 'devel' into divertor_monoblock_sensitivity

dfdbb1c

Add definition for link in documentation and reorganize tests for div…

475dade

…ertor monoblock

Reduced fidelity of the tests so that they run in a reasonable amount…

53ae10d

… of time

simopier requested changes Oct 15, 2025

View reviewed changes

	title = {Thermal-hydraulic simulation of ITER tungsten divertor monoblock for loss of flow transient},
	title = {{Thermal-hydraulic simulation of ITER tungsten divertor monoblock for loss of flow transient}},

	title = {The Evaluation of the Heat Loading from Steady, Transient and Off-Normal Conditions in ARIES Power Plants},
	title = {{The Evaluation of the Heat Loading from Steady, Transient and Off-Normal Conditions in ARIES Power Plants}},

	A sensitivity study on material properties has [also been demonstrated](examples/divertor_monoblock/sensitivity.md exact=True).
	Note that the current model has been utilized in a follow up study to perform a sensitivity study on material properties and operation conditions, for which the documentation is available [here](examples/divertor_monoblock/sensitivity.md exact=True).

		@@ -0,0 +1,123 @@
		# Divertor Monoblock Sensitivities

		This work consists of sensitivity studies of different operating conditions performed on the [Divertor Monoblock](https://mooseframework.inl.gov/TMAP8/examples/divertor_monoblock/index.html). The original pulsed operation of the divertor monoblock model was modified according to [!cite](Hodille2021126003) towards a single-long tritium and heat flux pulse of an approximate equivalent total fluence. An initial sensitivity study on was performed on the divertor monoblock's boundary conditions under the steady pulse condition using the [Sobol Method](https://mooseframework.inl.gov/modules/stochastic_tools/examples/sobol.html) and other tools within the [Stochastic Tools Module](https://mooseframework.inl.gov/modules/stochastic_tools/). Two additional sensitivity studies were performed on select transients obtained from [!cite](ELMORSHEDY2024101616) and [!cite](Kessel01092013).

Divertor monoblock sensitivity #280

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