Periodically North America experiences cold weather events resulting in unexpected operating constraints on facilities, including fuel resource limitations, and outages, scheduled and unscheduled. Various organizations are making an effort to reduce these risks, however those efforts will not encompass all risk areas. The MRO Generator Winterization Program (GWP) will focus on those areas of risk not covered by other initiatives.

MRO developed the GWP Survey to send to select entities each year in an effort to review their winterization plans. MRO encourages all generating facilities to download a copy of the survey and perform a self-assessment of their plans for winterization through the use of the survey.

Submit questions regarding the Generator Winterization Program to

The following resources related to winterization are available:

NERC Lessons Learned

Plant Fuel Switching and Cold Weather

Plant Instrument and Sensing Equipment Freezing Due to Heat Trace and Insulation Failures

Generating Unit Temperature Design Parameters and Extreme Winter Conditions

Adequate Maintenance and Inspection of Generator Freeze Protection

Unanticipated Wind Generation Cutoffs during a Cold Weather Event

NERC Reliability Guideline

Generating Unit Winter Weather Readiness – Current Industry Practices – Version 3