Research Article

PSO Based Optimization of Testing and Maintenance Cost in NPPs

Table 6

Constraints on test intervals (TI).

Test intervalValvesPumpsConstraintsPermitted range

V1, V2PA, PB, PC = ·
= · ·
168 h ≤ ≤ 8670 h
V3, V51 ≤ ≤ 10
V4, V7, V81 ≤ ≤ 10