Journey Through Time 69. Chernobyl: The Countdown To Catastrophe (Ep 2)
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Jan 29, 2026 Gripping reconstruction of the night reactor four failed and why a critical safety test was overdue. Tense control-room drama as crew decisions collide with reactor instability. A fatal design flaw in the shutdown system triggers a catastrophic power spike and two massive explosions. Immediate chaos, the first casualty in the pump hall, and the spread of deadly radiation across Ukraine and beyond.
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The 45-Second Power Gap Risk
- Reactor pumps need continuous power and diesels take up to 45 seconds to reach full power, creating a dangerous gap if the grid fails.
- The test aimed to see if coasting turbines could bridge that gap, highlighting a timing vulnerability in backup systems.
Signed Off Without Crucial Verification
- Reactor 4 had been signed off without the required test to prove turbine backup power could bridge the gap.
- Repeated failed attempts in 1982, 1984 and 1985 left the test two years overdue when the disaster occurred.
Quotas And Timing Created A Perfect Storm
- End-of-month quotas and May Day demand made it politically and practically difficult to reduce grid power for the test.
- Delays forced the test into the night shift, reducing experienced oversight and increasing risk.