I can't speak to the nuclear industry, which must have different rules than for the rest of us. Here are two links to the EPA. One is about R134-a and motor vehicles and the other is about R22 and home use, which probably covers boats too. I did get the phase out date wrong.
https://www.epa.gov/mvac/refrigerant-transition-environmental-impacts
https://www.epa.gov/sites/productio...c_refrigerants_to_protect_the_ozone_layer.pdf
Thanks for the references.
This is a good example of where it can get confusing on the regs.
The first reference states that NEWLY MANUFACTURED vehicles cannot use systems requiring R-134a. Seems to be limited to vehicles only. However, the refrigerant itself (R-134a) does not have a phaseout date. It will be around for quite a long time. And yes, there are no limitations or phaseouts of industrial compressor manufacturers using R-134a that I am aware of.
The second reference states the following,
"Because R-22 depletes the ozone layer, production and import was further limited in 2010. In 2020, R-22 will no longer be produced or imported.
After 2020, only recovered, recycled, or reclaimed supplies of R-22 will be available.
The production (not use) of R-22 is being phased out. You are not required to stop using R-22 air conditioners nor to replace existing equipment."
To my knowledge, there are significant existing stockpiles of R-22 to outlast our lifetime. And R-22 is still being recovered from systems that are changing to different refrigerants. Since equipment with R-134a is still available.. and you can substitute R-22 in a compressor designed for R-134a, there is technically no real concerns with use of R-22 or R-134a into the foreseeable future.