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Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

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Practitioner versus analyst methods: a nuclear decommissioning case study.

Guy Walker¹, Mhairi Cooper², Pauline Thompson¹

¹Institute for Infrastructure and Environment (IIE), School of the Built Environment, Heriot-Watt University, Edinburgh EH14 4AS, UK.

Applied Ergonomics

|June 21, 2014

Summary

This summary is machine-generated.

Hazard identification methods were tested during nuclear power plant decommissioning. Cognitive Work Analysis proved more effective than Structured What-If for novel decommissioning tasks.

Keywords:

CWA Hazard identification SWIFT

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Area of Science:

Nuclear Engineering
Risk Management
Safety Science

Background:

Nuclear power plant decommissioning presents unique hazard identification challenges compared to operational phases.
Routine risk assessment methods may be insufficient for novel and uncertain decommissioning scenarios.
The transition from operation to decommissioning necessitates re-evaluation of safety procedures.

Purpose of the Study:

To compare the effectiveness of two hazard identification methods in a nuclear power plant decommissioning context.
To determine if established methods are suitable for novel decommissioning tasks.
To identify optimal hazard identification strategies for the decommissioning phase.

Main Methods:

Applied Structured What-If (practitioner-focused) and Cognitive Work Analysis (analyst-focused) methods.
Utilized a real-world hazard identification task during the decommissioning of a UK Magnox Nuclear Power Station.
Focused on the removal of High Dose Rate Items from a Cartridge Cooling Pond.

Main Results:

Cognitive Work Analysis demonstrated greater efficacy in addressing the novelty and uncertainty inherent in decommissioning tasks.
The Structured What-If method, while established, showed limitations in identifying unforeseen hazards in the decommissioning context.
Direct comparison provided empirical data on method performance in a shift from operational to decommissioning phases.

Conclusions:

Cognitive Work Analysis is better suited for hazard identification in novel and uncertain nuclear decommissioning environments.
Established methods like Structured What-If may require adaptation or supplementation for decommissioning.
The study highlights the importance of selecting context-appropriate hazard identification tools for different lifecycle stages of nuclear facilities.