In China there is already small-scale nuclear district heating.

"China's Haiyang nuclear power plant in Shandong province has begun its sixth heating season, covering an area of nearly 13 million square metres - 500,000 square metres more than last year."

https://www.world-nuclear-news.org/articles/chinas-first-com...

Similar plans exist for Finnland. https://thinkatom.net/wp-content/uploads/2020/03/rauli-parta...

In Switzerland both Beznau and Gösgen nuclear power plant produce district heating in addition to power. Beznau makes available 80 MW of heat to industry and homes over a 130 km network serving 11 towns https://world-nuclear.org/information-library/country-profil...

In Slovakia since 1987, Slovak power utility Slovenské Elektrárne (SE) has been producing heat for Trnava, Leopoldov, Hlohovec and the municipality of Jaslovské Bohunice from the Jaslovské Bohunice NPP. This plant produced 429 GWh of heat in 2023. The high ten-kilometre hot water pipe between the Jaslovské Bohunice power plant and the Trnava heating plant began construction in 1983 and was put into operation at the end of 1987. Heat project for Mochovce NPP is also planed.

https://www.neimagazine.com/news/mochovce-npp-heat-project-u...

There are many plans and ideas for advanced uses of nuclear heat for industrial applications.

https://world-nuclear.org/information-library/non-power-nucl...

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