If a planned outage starts at 8:00 am and requires a 12-hour cool down with a 50 megawatt load, when should operators begin shutdown operations?

To determine when operators should begin shutdown operations for a planned outage that starts at 8:00 am and requires a 12-hour cool down with a 50 megawatt load, we must consider the timing of the operations and the implications of the cooldown period on the outage schedule.

The planned outage requires starting at 8:00 am, meaning operators will need to account for the time it takes to fully cool down the system before it can safely be taken offline. If the cool down period lasts 12 hours, this implies that by starting the shutdown operation at a specific time, the operators can ensure the system is at the required temperature for safe and efficient operation.

If the required cooling period is 12 hours and the intention is to have the unit completely cooled down before the outage is declared at 8:00 am, then the critical point is to calculate backward from that time. By starting the cooling process 12 hours before 8:00 am leads us to 8:00 pm the previous day. However, since this scenario talks about the required load, operators need to account for balancing and coordination timings.

If shutdown operations begin at 4:50 p.m., this provides ample time to ensure that the system is able to achieve