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Methodology for calculating GHG emissions under PG&E's supply portfolio <br /> MRW calculated the GHG emissions for the Alameda CCA load under the PG&E supply <br /> portfolio by summing the emissions from all resources in PG&E's portfolio. MRW assumed no <br /> GHG emissions from renewable power,hydroelectric power,or nuclear generation. In order to <br /> maintain a consistent comparison, MRW used the same emissions rate to calculate the emissions <br /> from PG&E's fossil-fuel power as used for the Alameda CCA wholesale market purchases. <br /> In order to support the analysis on Chapter 3 of the report, Figure 2 shows the PG&E portfolio. <br /> Before the closure of the Diablo Canyon, MRW estimated more than 70% of PG&E's generation <br /> portfolio based on non-fuel-fired resources. After 2025, the non-fuel-fired resources share falls to <br /> 65% according MRW estimates. <br /> Figure 2 PG&E's generation portfolio <br /> 100% <br /> 90% 26% 25% 22% 20% 21% 25% 26% 29% <br /> 80% _ _ 45% 44% 38% 36% 35% 34% <br /> 70% <br /> 60% <br /> 1;29"%' <br /> 28% 25% â– Nuclear 50% Rble 40% Fuel-Fired <br /> â– Hydroelectrc <br /> 30% e <br /> II1HiIIIHI1 <br /> 0% <br /> 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 <br /> GHG allowance prices and GHG indirect costs <br /> MRW developed a forecast of the prices for GHG allowances based on the results of the <br /> California Air Resources Board's (ARB's) auctions for Vintage 2015 allowances,44 increased <br /> annually in proportion to the auction floor price increases stipulated by the ARB's cap-and-trade <br /> regulation.45 <br /> as Auction results available at http://www.arb.ca.gov/cc/capandtrade/auction/results summary.pdf. <br /> 4'California Code of Regulations,Title 17,Article 5,Section 95911. <br /> E- 2 <br />