Pre-EOP-entry briefing¶
When time allows, the SRO conducts a short pre-job briefing before formal EOP entry. Time-critical entries (reactor trip + SI) skip the briefing and run on training; non-time-critical entries (shutdown cooling fault, slow inventory loss) get one.
Briefing content¶
- Procedure identification — which EOP family, which entry procedure (E-0 / ES-0.0 / FR-x), and the symptom set that triggers entry.
- Role assignment — who runs the procedure (SRO), who performs actions (RO), who watches CSFs (STA), who is on auxiliary actions (auxiliary operator).
- Verification levels — which actions require concurrent verification, which require peer-check. See ./communication.md.
- Known hazards — equipment out of service, recent maintenance, pending surveillance.
- Stop conditions — symptoms that would force a procedure exit or escalation.
- Communications setup — who calls EAL classifications, who notifies the emergency response organisation.
Why pre-job briefings matter for EOPs¶
The procedure structure assumes the team has a shared mental model of what they're about to do. Without the briefing, parallel actions proceed under different assumptions about who's doing what. The briefing is the moment that mental model gets explicit. NEI 99-01 EAL escalations are routinely missed when the briefing was skipped under perceived time pressure.
When to skip¶
Reactor trip + safety injection is the canonical no-briefing entry. The trip already happened; the team enters E-0 in seconds; the briefing is replaced by the procedure structure itself (E-0's first steps are deliberately checklist-style for this reason).
Cross-reference¶
- Conservative decision-making — the principle that drives "when in doubt, brief."
- Three-way communication — the protocol the briefing assigns to action verification.