Not sure if this design draft fits to Rossi's claim, that all radiation (incl. gamma?) is thermalized. How would that work with the plastic parts from home depot?How can strong radiation from nuclear processes be thermalized in floating water? No shielding required because of no radiation? Many things don't fit together...
Rossi seems also only using pipe fittings from Home Depot for his outer heat exchanger structure. An advantage would be electric insulation.
e.g.
https://www.homedepot.com/p/Or…-FPT-Tee-31372H/300700124
compare with: https://arxiv.org/pdf/1703.05249.pdf
picture on page 19.