Rancho Seco “Light Bulb Incident”

  • Ron Colombo


Reactor tripped on high pressure due to a loss of feedwater, initiated by a fault on a Non-Nuclear Instrumentation Power supply. Considerable control room indication was lost. Safety Features actuated on low pressure following the reactor trip. When power was restored an hour and a quarter later, temperature had dropped to 285°F. The Reactor Coolant System was outside of its allowable pressure/temperature curve.


Steam Generator High Pressure Injection Reactor Coolant Pressure Relief Valve Surge Tank 
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Copyright information

© Springer Science+Business Media New York 1984

Authors and Affiliations

  • Ron Colombo
    • 1
  1. 1.Rancho Seco Unit OneSacramento Municipal Utility DistrictUSA

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