Current fusion (thermonuclear bombs) require a fission bomb trigger to start fusion in a lithium deuteride body, but reactors - absolutely not.

Fusion reactors do one of the following:

• use magnetic fields and electrical current to contain + heat a ring tritium (hydrogen isotope) plasma to extreme temperatures
• use a laser pulse to compress + heat a capsule of tritium to extreme temperatures
• use a magnetic field and electrical current to collide two rings of helion (helium isotope) plasma at extreme velocities

Short version: fusion needs fission only in warfare.