Reactor safety culture¶
Safety culture is not a procedure — it's the substrate that decides whether procedures get followed under pressure. The IAEA-derived principles (NS-G-2.14 and predecessors) describe what good safety culture looks like behaviourally. They are observable, not aspirational.
Principles¶
- Safety is the overriding priority. When a production decision and a safety decision conflict, safety wins. The crew never has to ask permission to make a safety-conservative call.
- Authority gradient stays flat in safety conversations. A junior crew member who sees a problem reports it. The senior crew member who hears it takes it seriously. Hierarchy applies to who decides; it does not apply to who notices.
- Questioning attitude. "Does this match what I expected?" is the default state, not a special mode. Anomalies are investigated before they're explained away.
- Rigour in execution. Procedures are followed step-by-step with three-way communication. Shortcuts are flagged, not taken.
- Transparency in reporting. Near-misses and partial-error events are documented at the same rigour as actual events. The population of reportable events is treated as the signal, not noise.
Behaviours that erode culture¶
- Production pressure overrides safety calls. "We can't afford to shut down for that." Cultural failure mode.
- Authority gradient suppresses junior callouts. "If the SRO isn't worried, I shouldn't be." Cultural failure mode.
- Procedure compliance becomes performative. Crew goes through the motions of three-way communication without checking the read-back content. Cultural failure mode.
- Near-miss reporting drops. Plants where reporting volumes decline are typically not getting safer; they are getting quieter. See oe-davis-besse-2002.md for the canonical example.
Cultural drift detection¶
Routine indicators: - Procedure compliance audit findings (rising = drift). - Near-miss / partial-error report volume per quarter (falling = drift). - Independent operator survey results. - Frequency of corrective-action programs initiated by operators (versus by management).