CREATE TABLE nuclear_power_plants (id TEXT, name TEXT, latitude TEXT, longitude TEXT, country TEXT, status TEXT, reactortype TEXT, reactormodel TEXT, constructionstartat TEXT, operationalfrom TEXT, operationalto TEXT, capacity TEXT, lastupdatedat TEXT, source TEXT)

How many PHWR are there today?
SELECT COUNT(*) FROM nuclear_power_plants WHERE reactortype = "PHWR"
SELECT COUNT(*) FROM "nuclear_power_plants" WHERE "PHWR" = "reactortype"