Event Report: Deficiency found in fire safety at Alabama nuke

The Nuclear Regulatory Commission’s Event Reports contain an item about a potential fire safety problem at Browns Ferry in Alabama. A safety inspection founded an ammeter that “is not fused or otherwise protected against an electrical fault.” The safety significance: “….in a scenario where the 250 VDC Battery Board system negative becomes grounded at the same time the ammeter cable 1B11 has a fault to ground, the cable may not be protected and the cable could auto-ignite anywhere along the cable’s length from the ground fault location back to the battery source. For example, in a Fire Area 16 (Control Bay) scenario, these ground faults could result in a fire being spread from Fire Area 16 to Fire Area 17 (Battery Board 1).”

You would expect that this nuclear plant would be particularly sensitive to this issue: In 1975, a fire closed Unit 1 at Browns Ferry for a year.

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About Robert Singleton

By day, I work for a call center. In my spare time, I try to save my hometown (and planet) from a nearly constant onslaught of greedheads, lunatics and land developers. I live in a fictional town called Austin, Texas, where I go to way too many meetings.
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