# Simulation Triso

**URL:** <https://openmc.discourse.group/t/simulation-triso/1870>\
**Category:** User Support\
**Created:** [March 27, 2022, 3:22am UTC](https://openmc.discourse.group/t/simulation-triso/1870 "2022-03-27T03:22:10Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Yos](https://avatars.discourse-cdn.com/v4/letter/y/ed8c4c/32.png) [@Yos](https://openmc.discourse.group/u/Yos)\
**Post date:** [March 27, 2022, 3:22am UTC](https://openmc.discourse.group/t/simulation-triso/1870/1 "2022-03-27T03:22:10Z")

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Hi all, I’m new to OpenMC. I’m simulating Triso particles in the SMR core. I have created Triso in fuel rod and 17\*17 fuel assembly just like this.

 ![image](https://global.discourse-cdn.com/free1/uploads/openmc/original/2X/4/42e59e22d27ab32379bd613b1a95e103ae7a324c.jpeg)

![image](https://global.discourse-cdn.com/free1/uploads/openmc/original/2X/6/6c49b1d1183e6d13e4fb262162e57d50a5f73836.png)  
But, when I created it in the core. It shows like this.

 ![image](https://global.discourse-cdn.com/free1/uploads/openmc/original/2X/e/e781302e0e1a6be1a05655cf6fb6302b312b834e.png)  
 ![image](https://global.discourse-cdn.com/free1/uploads/openmc/original/2X/c/ccab49e24d252831eee60934e8977f79cd846140.jpeg)  
 ![image](https://global.discourse-cdn.com/free1/uploads/openmc/original/2X/3/37e250dce262381223ab6e0221720abec8c59c69.png)

Has anyone have ever created Triso in the core? Help me, please.  
This is my script.  
[7.py](https://openmc.discourse.group/uploads/short-url/sxnVQHvBUFZk2bQNRaIqqpqMqJb.py) (20.4 KB)

Thank you.  
Yos.

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**Author:** ![mkreher13](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/mkreher13/32/4093_2.png) [@mkreher13](https://openmc.discourse.group/u/mkreher13)\
**Post date:** [March 29, 2022, 10:33pm UTC](https://openmc.discourse.group/t/simulation-triso/1870/2 "2022-03-29T22:33:15Z")

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Hi Yos, here is an example of TRISO particles in OpenMC: [Jupyter Notebook Viewer](https://nbviewer.org/github/openmc-dev/openmc-notebooks/blob/main/triso.ipynb)

Best,  
Miriam

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<div class="post-metadata">

**Author:** ![Yos](https://avatars.discourse-cdn.com/v4/letter/y/ed8c4c/32.png) [@Yos](https://openmc.discourse.group/u/Yos)\
**Post date:** [April 1, 2022, 4:05am UTC](https://openmc.discourse.group/t/simulation-triso/1870/3 "2022-04-01T04:05:58Z")

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Thank you @mkreher13 for your reply. Now, I can solve it. I have another question that I have tried to simulate triso at dimention of triso outer radius of micrometer but it shows kernel died. How can I simulate triso at dimention of micrometer?

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**Author:** ![mkreher13](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/mkreher13/32/4093_2.png) [@mkreher13](https://openmc.discourse.group/u/mkreher13)\
**Post date:** [April 1, 2022, 2:47pm UTC](https://openmc.discourse.group/t/simulation-triso/1870/4 "2022-04-01T14:47:04Z")

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I’m not entirely sure what the issue is, but I suggest that you start with the OpenMC TRISO example, and then change one thing at a time to slowly migrate it over to your specific dimensions. By making changes one at a time, you can identify what issues are causing the error.

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**Author:** ![Yos](https://avatars.discourse-cdn.com/v4/letter/y/ed8c4c/32.png) [@Yos](https://openmc.discourse.group/u/Yos)\
**Post date:** [April 1, 2022, 5:16pm UTC](https://openmc.discourse.group/t/simulation-triso/1870/5 "2022-04-01T17:16:32Z")

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Thank you so much for your suggession.