There are actually four turbines, one very heavy generator rotor and one small exiter rotor connected to one shaft at DCPP.
The 3 low pressure steam turbines are approximately 100 tons each and the generator rotor is about 150 tons, so the mass moment of inertia can’t be the same as Helms, I’ve been to both plants, so I agree, there is no comparison.
DCPP’s 500 tons of spinning mass at 1800 rpm is absolutely the largest contributor to SGI in California, no doubt!
I agree! Thank you for your clarification and update. Since I used 50 tons total mass for DCPP in the above calculation and SGI is proportional to the moment of inertia, that means each DCPP generator produces about 75 times the SGI as each HPS generator. DCPP is the big dog in California, indeed since there are two of these huge generators at DCPP!
There are actually four turbines, one very heavy generator rotor and one small exiter rotor connected to one shaft at DCPP.
The 3 low pressure steam turbines are approximately 100 tons each and the generator rotor is about 150 tons, so the mass moment of inertia can’t be the same as Helms, I’ve been to both plants, so I agree, there is no comparison.
DCPP’s 500 tons of spinning mass at 1800 rpm is absolutely the largest contributor to SGI in California, no doubt!
I agree! Thank you for your clarification and update. Since I used 50 tons total mass for DCPP in the above calculation and SGI is proportional to the moment of inertia, that means each DCPP generator produces about 75 times the SGI as each HPS generator. DCPP is the big dog in California, indeed since there are two of these huge generators at DCPP!