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BOTTOM LINE:  through using waste heat from cooling a 1 GW nuclear power plant instead of rejecting it to atmosphere or to a lake or river, roughly $750 million per year in H2 sales at the current wholesale market price $1.50/kg FOB at the pipeline tie-in could theoretically be realized.  


A 1 GW power plant typically grosses  $650-780 million in electrical sales per year.   With the waste heat driving a chemical refinery providing a broad range of chemical feedstocks, these numbers could be jinked up  an additional  50% to 75% given a thorough  market analysis, chemically-prototyped product design plus a pilot plant, logistical planning and proper contractual arrangements.  


Yes, supplementary firing will be required in the form of gas-fired steam superheater  or better still a Benton boiler.  900 degrees C. is when the magic of chemistry kicks in.


Nothing says a dauntless entrepreneur  cannot do the same with a combined-cycle gas turbine plant or conventional coal plant either.  Hydrocarbon feedstock to the  chemical plant?  Captured CO2, naturally plus H2 via the electrolytic process described in the Idaho National Laboratory document given above.  For conventional plants a retrofitted  electrolytic process plant is also needed to be added plus the fired steam superheater.


The fired superheaters will be fueled by the generated hydrogen.

Nuclear power plants worldwide


Country          Number          Ratings total


USA                   93                       95.5 GW


 EU                     173                     154.5 GW


RF                      38                       37.2 GW


PRC                   50                       49.6 GW


          India                  22                         7.4 GW




Units                376                    344.2 GW


Potential H2 Tonnage Output/Year


75.4 million zero-emission metric tonnes

Excerpted from .PDF page 74 of the Report  “Technoeconomic Analysis of Product Diversification Options for Sustainability of the Monticello and Prairie Island Nuclear Power Plants, November 2021”