<prompt> Translate the following text to EnglishKwa mfano, mfumo wa 900MW unakadiriwa kutumia karibu tani 2,000 za chuma, au karibu tani 2.2 za chuma kwa MWh, badala ya jumla ya tani 2025 kwa hali ambayo boilers zinahitaji absorbers tofauti.  <response>: For example, a 900 MWe system is estimated to use approximately 2000 tons of steel, or about 2.2 tons of steel per MWe, rather than a combined maximum of 2025 tons for a situation in which the boilers required separate absorbers. 