All
PWR
BWR
All
Auto
Manual
?
Total confirmed reactor scrams (automatic + manual trips) reported to the NRC so far this calendar year.
-
Scrams This Year
?
Average number of days for a reactor to return to 95% power after a scram event. Based on recovery data from the last 5 years.
-
Avg Recovery
days to 95% power
?
Year-end projection based on the current scram rate. Calculated as: (YTD scrams / days elapsed) × 365.
-
Projected This Year
?
Rolling count of scram events in the last 365 days, regardless of calendar year boundaries.
-
Last 365 Days
?
Automatic: Reactor Protection System triggered the trip automatically.
Manual: Operator initiated the trip manually (e.g., via manual scram switch).
Manual: Operator initiated the trip manually (e.g., via manual scram switch).
-
Auto / Manual
?
PWR (Pressurized Water Reactor): Uses pressurized water as coolant; ~65% of U.S. fleet.
BWR (Boiling Water Reactor): Water boils directly in the core; ~35% of fleet.
BWR (Boiling Water Reactor): Water boils directly in the core; ~35% of fleet.
-
PWR / BWR
?
Interactive map showing the geographic location of each scram event. Marker color indicates recency; border glow indicates automatic (green) vs manual (red) trip.
Scram Events by Location
?
Month-by-month comparison of scram counts for the current year and two prior years. Helps identify seasonal patterns and year-over-year trends.
Monthly Scram Trend — Last 3 Years
?
Total scram events per calendar year across the U.S. fleet. The dashed red line shows the 5-year rolling average.
Annual Scram Totals
?
Average scram count by calendar month across all years. Reveals whether certain months historically experience more scram events.
Seasonal Pattern (All Years)
?
Stacked comparison of scram events by reactor type each year. PWR (~65% of fleet) vs BWR (~35%).
PWR vs BWR by Year
?
Stacked comparison of automatic vs manual scram trips each year. Automatic = Reactor Protection System; manual = operator-initiated.
Auto vs Manual by Year
?
Ranking of reactor units by total scram count. Toggle to show most/fewest scrams, normalize per GW of capacity, or aggregate by owner/operator.
Fewest Scrams — Top 15
?
States ranked by total scram events. States with more reactors appear higher; compare with the per-GW plant view for size-normalized rankings.
Scrams by State — Top 15
?
Average days for each plant to return to 95% power after a scram. Based on last 5 years. Shorter = faster post-trip restart capability.
Average Recovery Time by Plant (last 5 years)
?
Distribution of reactor power levels at the moment of each scram. Most occur at high power (90–100%); low-power trips may indicate different root causes.
Power Level at Time of Scram
?
Searchable, sortable table of all scram events matching current filters. Includes date, plant, type, trip, power level, recovery time, and NRC event links.
Scram Event Log
| Date | Plant | Type | Trip | Power% | Recovery | Description | NRC |
|---|