In TOAW 3, the nuclear weapon was treated as a Attack Strength Multiplication
19.2.4 Nuclear Weapon Yields
Atomic-capable systems are individually rated for a Nuclear Attack Strength. The following values are defined for various equipment. These values are added to a unit’s conventional Attack Strength. At sub-kiloton levels, the addition may not be particularly significant.
Conventional Yield Equivalent
0.1kT 25
0.2kT 50
0.5kT 125
1kT 250
2kT 500
5kT 1250
10kT 2500
20kT 5000
25kT 6250
40kT 10000
The problem is most of surface to surface missile and nuke capable artillery have Anti-Tank Strength at 0. That cause a weird combat result: a SSM delivered a 4mT nuke to a BMP-2 company at 2.5km hex, no casualty at all!
another thing I noticed is, in TOAW 3, the NBC protection doesn't provide any bonus on MP cost when the unit get into the contamination zone