Development Considerations of AREVA NP Inc.'s Realistic LBLOCA Analysis Methodology

Table 5

Treated process parameters and relation to PIRT.

Process parameter	Influenced phenomenon (PIRT subset)
Fuel state (burnup and power peaking)	Stored energy
Core power	Stored energy
Power peaking, axial shape	Stored energy
Loop flow rate	Flow split, DNB
Core inlet temperature	DNB
Upper head temperature	Flow reversal, stagnation
Pressurizer pressure, level	Early quench, critical flow in surge line
Accumulator pressure, temperature, level	Accumulator discharge, condensation, noncondensable gases
Containment volume, heat transfer, sprays	Backpressure, critical flow
Steam generator feedwater temperature	Core heat transfer
Offsite power and diesel start delay	Core heat transfer via pumped ECC