Calculating this limit accurately is the primary function of the Duke Power Heat Flux Calculator.
The primary safety concern in a nuclear core is , often historically referred to as DNB (Departure from Nucleate Boiling). As the heat flux increases, the temperature of the fuel cladding rises. If the heat flux exceeds a critical value, the heat transfer mechanism changes drastically. Bubbles coalesce to form a vapor film on the fuel rod surface, insulating the rod from the liquid coolant. This causes the temperature of the fuel cladding to spike rapidly, potentially leading to fuel damage or failure. Duke Power Heat Flux Calculator Download
: It assumes a phase-to-ground arc. For three-phase service panels, experts recommend multiplying the resulting incident energy by a factor of to account for conductive plasma involving all phases. Open Air vs. Enclosure Calculating this limit accurately is the primary function
: Provides the software as a free "product" in their catalog for safety professionals. ArcAdvisor If the heat flux exceeds a critical value,