[Small reactor setup?]

I planned to make a small reactor. Just the nuclear reactor, no chambers and i dont really understand the heat vent, pipe mechanics and i only found setups for reactors with 6 chambers. So could someone either give me a save setup oder explain it for dummies how the vent and stuff works?

Thanks

[What is this mod and how do I disable it?]

https://imgur.com/a/0zj0S

 

Well I am playing tekkit lite on a nitrado hosted server, But i don´t like this thing. I thought it was from mystcraft and this is the decay. So i turned off decay in the mystcraft config file. Still there. Then i disabled Mystcraft mod on the server. Still there. I dont even want mystcraft. Also there are randomly obsidian blocks appearing and endermen like hell!

Help please, Thanks

Here is the list of my installed mods. All active instead of mythcraft   [1.4.7]bspkrsCorev2.02.zip

AdditionalPipes2.1.3u42-BC3.4.2-MC1.4.7.jar
adv-repulsion-systems-52.0.6.jar
AdvancedMachines_1.4.6.zip
AdvancedPowerManagement-1.1.55-IC2_1.112.jar
appeng-rv9-i.zip
buildcraft-A-3.4.3.jar
ChickenChunks 1.3.1.0.jar
CoFHCore-1.4.7.3.zip
compactsolars-universal-1.4.7-4.0.3.29.zip
ComputerCraft1.5.zip
dimensional-anchor-52.2.0.jar
DimensionalDoors-1.4.7 v1.3.2.zip
ee3-universal-pre1f.jar
EnderStorage 1.4.1.2.jar
Factorization-0.7.21.jar
FlatBedrock_1.0.3.zip
IC2NuclearControl-1.4.6.zip
immibis-core-52.4.6.jar
industrialcraft-2_1.115.231-lf.jar
ironchest-universal-1.4.7-5.1.0.275.zip
LogisticsPipes-MC1.4.7-0.7.0.96.jar
MineFactoryReloaded-2.3.2-287.jar
ModularPowersuits-0.3.2-199.jar
mystcraft-uni-1.4.7-0.10.1.00.zip
nei_plugins-1.0.4.5a.jar
NEI_RedPowerPlugin 1.4.3.1.jar
NetherOres-2.0.6-32.jar
OmniTools-3.0.4.zip
OpenCCSensors-0.1.4b.zip
PowerConverters-2.2.2-29.jar
RedPowerCompat-2.0pr6.zip
RedPowerCore-2.0pr6.zip
RedPowerDigital-2.0pr6.zip
RedPowerMechanical-2.0pr6.zip
StevesCarts2.0.0.a62.zip
ThermalExpansion-2.2.2.2.zip
tubestuff-52.3.2.jar
Weaponmod.zip
WR-CBE Addons 1.3.2.8.jar
WR-CBE Core 1.3.2.8.jar
WR-CBE RedPower 1.3.2.8.jar