Some balance advice of nuclear reactor

[1112 (茶壶 小)]

I have tried the nuclear reactor for some days and find some data can be more balanced.

1. The multiple of Self and Emission in Industrial Coolant(4 times) seems too much.
   We can easily fill Pu-239 or other good fuel rod in nuclear reactor core(2x2), and put nuclear reactor core(1x1) with Neutron Absorbs Rod, like this:
   

   
   
   The Efficiency would be really high(about 125% if use real output heat divide by the maximum), of course it is not overloaded.
   But if use other coolant, we always need to build a “supercritical power producing reactors”, you kwon it is not easy , to get that high Efficiency. It is usually not even possible to get the 125% Efficiency.

2. The Emission calculation:
   En = e + ((n – s) * f)
   It is easy to find the En may be less than zero, and I really got it in game:
   

   
   
   (left: Pu-244 Fuel Rod, right: Neutron Absorbs Rod, coolant: Helium)
   this may not like a suggestion but it did not actually cause any bugs in the scope of my test.

[1112 (茶壶 小)]

It seems 1.5 times in Industrial Coolant would be great in my test