ENERGY & NUCLEAR
The highest stakes per site. The lowest tolerance for paper-only compliance.
Across 36 licensed nuclear sites and the wider energy estate, the ONR expects fitness-for-duty to be demonstrated, not assumed. ALARP is not a slogan. RosterWise provides the biomathematical evidence that fatigue risk has been reduced as low as reasonably practicable — on every roster, for every shift, with an audit trail the inspector can examine.
REGULATORY PRESSURE
Where the energy & nuclear sector sits under ONR scrutiny.
| Regulation | Requirement | Enforcer |
|---|---|---|
| Nuclear site licence conditions (LC 12, LC 26, LC 27) | Duly authorised persons, adequate management arrangements, and control of organisational change — all of which depend on workers being fit for duty. | ONR |
| ALARP principle | Reduce fatigue risk so far as reasonably practicable — evidenced, not assumed. Fatigue must be assessed using a recognised methodology. | ONR / HSE |
| Working Time Regulations 1998 | Average 48-hour week, daily and weekly rest, night worker health assessments, special hazard limits. | HSE |
FATIGUE BY THE NUMBERS
What the energy & nuclear evidence base shows.
36
licensed nuclear sites in the UK, every one subject to ONR fitness-for-duty expectations
ALARP
the legal test the regulator applies — risk must be reduced as low as reasonably practicable, with evidence
Highest
stakes per site of any UK sector — and the most prescriptive interpretation of fatigue management
GHOST SHIFT EXAMPLE
A common energy & nuclear pattern that hides in plain sight.
A control room shift pattern at a generating site uses a 4-on / 4-off rotation that flips between days and nights every cycle. Every individual shift is inside WTR. Every rest period is contractually adequate. The biology tells a different story. Forward-rotating-then-back patterns prevent stable circadian alignment, and the first night of each block consistently scores in the elevated-risk band. Across a 12-month roster window, RosterWise quantifies how much of the fatigue load could be reduced by modest pattern adjustments — and produces the evidence pack that demonstrates ALARP to the ONR. Without that evidence, fitness-for-duty is an assertion. With it, it is a defendable position.
HOW ROSTERWISE HELPS
Built for the operational realities of energy & nuclear.
- ALARP evidence pack — quantified fatigue load on every roster, with reduction options scored, dated, and recorded.
- Fitness-for-duty risk assessment aligned to ONR expectations and the HSE RR446 methodology heritage.
- Designed for control rooms, outage teams, response crews, and shift supervisors across nuclear and conventional generation.
- Aggregate dashboards for the SQEP-accountable manager and Head of Safety — no individual operator fatigue scores exposed.
- Confidential worker coaching through the mobile app, with night-shift-specific circadian guidance.
- Audit-ready exports formatted for ONR inspection and licensee periodic review.