# Error in chain\_file generation from\_endf **URL:** \ **Category:** User Support\ **Created:** [January 29, 2024, 8:54pm UTC](https://openmc.discourse.group/t/error-in-chain-file-generation-from-endf/3876 "2024-01-29T20:54:04Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Jefferson](https://avatars.discourse-cdn.com/v4/letter/j/8491ac/32.png) [@Jefferson](https://openmc.discourse.group/u/Jefferson)\ **Post date:** [January 29, 2024, 8:54pm UTC](https://openmc.discourse.group/t/error-in-chain-file-generation-from-endf/3876/1 "2024-01-29T20:54:04Z")
Hi Paul and everyone, I am not very good on english, but i will try my best to explain the situation. I am working with the OpenMC v0.13.3 for a while and now im trying to make a chain\_file from the JEFF-3.1 ENDF files. For this i have splitted up the FPY and Decay files according to ENDF-B-VII.1. Running my code with “ENDF-B-VII.1” files works just fine (no errors or warnings), but when i try to run it with the JEFF-3.1 files it gets this error: _"Processing neutron sub-library files…_ _Processing decay sub-library files…_ _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent I134\_m1 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Sn108 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent Sn132 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Hf172 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Sn106 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Bi202 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Pd96 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent In123\_m1 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent In130\_m1 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Cs127 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘alpha’] of parent Rn197\_m1 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent Se84 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent La133 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent Cu73 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Fe52 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Mo91\_m1 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent La135 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent Y90\_m1 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘ec/beta+’] of parent Ru94 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent Sn128 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/data/decay.py:270: UserWarning: Decay mode [‘beta-’] of parent Sn126 has a zero branching ratio._ - warn(‘Decay mode {} of parent {} has a zero branching ratio.’\* _Processing fission product yield sub-library files…_ _Creating depletion\_chain…_ _missing Be14 beta- B14_ _missing Co68 beta- Ni68_ _missing Co68\_m1 beta- Ni68_ _missing Co69 beta-,n Ni68_ _missing As80 beta- Se80_ _missing Br80 ec/beta+ Se80_ _missing Kr72 ec/beta+ Br72\_m1_ _missing Kr73 ec/beta+ Br73_ _missing Kr90 beta- Rb90_ _missing Kr94 beta- Rb94_ _missing Kr95 beta-,n Rb94_ _missing Rb90\_m1 IT Rb90_ _missing Rb93 beta- Sr93_ _missing Rb95 beta- Sr95_ _missing Rb96 beta-,n Sr95_ _missing Y100 beta- Zr100_ _missing Y100\_m1 beta- Zr100_ _missing Nb104 beta- Mo104_ _missing Nb104\_m1 beta- Mo104_ _missing Nb105 beta-,n Mo104_ _missing Ru111 beta- Rh111_ _missing Pd116 beta- Ag116_ _missing Ag108 beta- Cd108_ _missing Ag116\_m1 IT Ag116_ _missing In108 ec/beta+ Cd108_ _missing In108\_m1 ec/beta+ Cd108_ _missing Sn126 beta- Sb126\_m2_ _missing Sn127 beta- Sb127_ _missing Sn127\_m1 beta- Sb127_ _missing Sb122 beta- Te122_ _missing Te139 beta- I139_ _missing I121 ec/beta+ Te121\_m1_ _missing I122 ec/beta+ Te122_ _missing La146 beta- Ce146_ _missing La146\_m1 beta- Ce146_ _missing Ho164\_m1 IT Ho164_ _missing Er160 ec/beta+ Ho160\_m1_ _missing Er163 ec/beta+ Ho163\_m1_ _missing Re177 ec/beta+ W177_ _missing Os192\_m1 beta- Ir192\_m2_ _missing Os193 beta- Ir193_ _missing Ir181 ec/beta+ Os181_ _missing Ir193\_m1 IT Ir193_ _missing Pt193 ec/beta+ Ir193_ _missing Pt200 beta- Au200_ _missing Au193\_m1 IT Au193_ _missing Au200\_m1 IT Au200_ _missing Hg193 ec/beta+ Au193_ _missing Hg193\_m1 ec/beta+ Au193_ _missing Tl191 ec/beta+ Hg191_ _missing Pb213 beta- Bi213_ _missing Bi201 ec/beta+ Pb201\_m1_ _missing Bi201\_m1 ec/beta+ Pb201\_m1_ _missing Bi211 beta- Po211_ _missing Bi215 beta- Po215_ _missing Bi215\_m1 beta- Po215_ _missing Bi217 beta- Po217_ _missing At211 ec/beta+ Po211_ _missing At217 alpha Bi213_ _missing At221 beta- Rn221_ _missing At223 beta- Rn223_ _missing Rn215 alpha Po211_ _missing Rn217 alpha Po213_ _missing Fr223 alpha At219_ _missing Fr225 beta- Ra225_ _missing Ra223 alpha Rn219_ _Traceback (most recent call last):_ - File “/home/jefferson/mestrado/SEALER/MonteCarloCode/OpenMC/UO2/burnup/chain\_jeff/create\_chain.py”, line 37, in \* - chain = openmc.deplete.Chain.from\_endf(decay\_files,fpy\_files,neutron\_files,progress=True)\* - ``` ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^* ``` - File “/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/deplete/chain.py”, line 411, in from\_endf\* - target = replace\_missing(mode.daughter, decay\_data)\* - ``` ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^* ``` - File “/home/jefferson/.conda/envs/openmc-env/lib/python3.11/site-packages/openmc/deplete/chain.py”, line 189, in replace\_missing\* - product = ‘{}{}’.format(openmc.data.ATOMIC\_SYMBOL[Z], A)\* - ``` ~~~~~~~~~~~~~~~~~~~~~~~~~ ^^^* ``` _KeyError: -1"_ I tried to make the individual files of FPY and Decay data as close as it gets to ENDF-VII data. And here is my code: _"import openmc_ _import openmc.deplete_ _import glob_ _#_\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* _# Generation of Depletion Chain_ _#_\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* _# Load ENDF sub-libraies: decay, fission product yield & neutrons_ \*decay\_files = glob.glob('…/chain\_jeff/JEFFRDD/_ASC’)_ \*fpy\_files = glob.glob('…/chain\_jeff/JEFFNFY/_ASC’)_ \*neutron\_files = glob.glob('…/chain\_jeff/JEFFN/_ASC’)_ _# Generate depletion chain_ _chain = openmc.deplete.Chain.from\_endf(decay\_files,fpy\_files,neutron\_files,progress=True)_ _chain.export\_to\_xml(‘chain\_jeff31.xml’)_ _print(‘Done’)"_ Any ideas of what can be going wrong? And thanks for reading it all.