Clean Areas

Critical Interfaces Between Controlled and Uncontrolled Areas

In nuclear facilities, certain so-called “clean” areas are located inside the Controlled Zone (CZ) — yet they carry high operational and regulatory stakes.

These areas are typically:

• directly adjacent to exits leading outside the CZ (fire doors, logistic airlocks, transfer hatches…),
• upstream of exit monitoring points (portals, detectors, counters),
• or serving as transfer points for objects, containers, or non-contaminated waste.

They must remain under strict control at all times. Yet in practice, these areas are often poorly monitored, irregularly inspected, or left without a clearly identified owner.

Common challenges

• No clear inventory or defined perimeter of the clean areas concerned
• Irregular or unrecorded radiological checks
• No evidence of inspection or maintenance except during audits
• Temporary objects left behind, never re-checked
• Difficulty demonstrating that the area was clean when moving into an HZ (Uncontrolled Zone)

How BROLZ helps

BROLZ provides structured documentation, traceability, and accountability for the monitoring of these critical interfaces.

Key features:

• Mapping of designated clean areas with description and location
• Scheduling of radiological or visual inspections
• Field deviation reporting (suspicious object, contaminated spot, obstruction…)
• Tracking of corrective actions: cleaning, re-inspection, securing
• Full verification history with evidence (photos, timestamps, user identity)
• Global status overview: compliant / pending check / anomaly detected

What changes with BROLZ

• A clear, up-to-date view of all critical clean areas
• Demonstrable control of CZ ↔ HZ interfaces
• Easier work for RP teams without multiplying paperwork
• Faster reaction time in case of anomalies or doubts
• Structured ownership of a topic often spread across multiple functions (logistics, RP, safety, operations, housekeeping)

Coming soon: A dedicated resource

We are preparing a practical guide to managing clean areas inside Controlled Zones, including:

• Sample monitoring sheets
• Model inspection plans (visual, radiological…)
• Organisational recommendations for cross-functional teams
• Real-world use cases from nuclear operations

The PDF will be available shortly. Subscribe to our newsletter to be notified.

These areas often don’t appear on any map… until the day they trigger a compliance gap. With BROLZ, you bring structure and evidence to the management of these sensitive interfaces — so nothing leaves the Controlled Zone without control or proof.

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