Breeding fish using water containing radioactive materials?

The "ALPS treated water," which is contaminated water from the Fukushima Daiichi Nuclear Power Plant treated with a device called ALPS, has become a problem.

This March, TEPCO will use the ALPS-treated water to test raising fish and shellfish.

However, since they are using radioactive materials to study health effects, even on fish, I think it is normal for a research institute to establish a code of ethics and conduct internal examinations accordingly.

For example (sorry, in Japanese)

https://www.maff.go.jp/nval/tyosa_kenkyu/pdf/dobutsu_rinri.pdf

Does TEPCO have a code of ethics for animal testing?

Also, TEPCO is receiving a large amount of support from substantial government funds. TEPCO is an electric power company. Does TEPCO have any experience in research using fish?

When fishermen, who are fish professionals, say "demonstrate that fish are not affected," they mean that treated water should not be discharged into the sea, not that they should experiment with it and prove that it is safe to eat. I wonder if TEPCO is sympathetic to the fishers' feelings of not discharging treated water into the sea.

Initially, why has the increase in treated water not stopped anytime soon?

TEPCO has not built a structural wall to stop the inflow of water because they insisted on something called a frozen soil wall. Because groundwater is forever flowing in, the contaminated water will increase. If contaminated water increases, it is only natural that treated water will increase.

It has been pointed out in the past by the "Specific Nuclear Facility Monitoring and Evaluation Study Group" established by the Nuclear Regulatory Commission that a structural wall should be built. However, TEPCO ignored this and did not build a structural wall.

First of all, doesn't it make sense for TEPCO, which is an amateur, to take fundamental measures instead of engaging in fish breeding?