[BUG] Spherical Tokamak has `vv_stress_quench = nan`

ukaea / PROCESS

PROCESS is a systems code at UKAEA that calculates in a self-consistent manner the parameters of a fusion power plant with a specified performance, ensuring that its operating limits are not violated, and with the option to optimise to a given function of these parameters.

https://ukaea.github.io/PROCESS/

MIT License

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[BUG] Spherical Tokamak has `vv_stress_quench = nan` #3199

Closed timothy-nunn closed 1 month ago

timothy-nunn commented 1 month ago

Describe the bug

Spherical Tokamak regression mfile has a nan VV stress.

Example

Steps to reproduce

Run process -i tests/regression/input_files/st_regression.IN.DAT
View the resulting MFile

Expected behaviour

VV stress is a real number

timothy-nunn commented 1 month ago

@chris-ashe suggests setting d_vv_in to something small, e.g. 0.2 should fix the problem