VALLEY FORGE, Pa. — Stakeholders approved PJM’s 2017 installed reserve margin (IRM) calculations at last week’s Planning Committee meeting. The updated calculations reduced the IRM from 16.6% to 15.8% for delivery year 2021/22, thanks to an anticipated fleet-wide equivalent forced outage rate (EFORd) reduction from 6.59% to 5.89%. PJM calculated...