do multiple power plants combine their effects?

[krp312]

if you build multiple power plants in a city, do their effects combine? i.e. coal plant + hydro plant = 50% productivity?

also, same q goes for the 3 gorges dam. if you build the dam, and then build a hydro plant so that city has both, will the effects combine?

 

[MrCynical]

No, power plants don't stack. Indeed if you build a power plant in a city which already has one, it jut replaces the old one.

 

[madscientist]

The power plants supply power, period. The factory is what gives you the 50% production regardless of the source of power. Some points

Coal: requires coal or oil
Hydro: If built in a city with coal plants, it will eliminate the +2 unhealth from the coal plant
3-Gorges Dam: Provide power to entire continent and eliminates all coal plant unhealthiness from thos cities.
Nuclear plant: DANGEROUS. Avoid it.

 

[Zanttu]

Nuclear plant: DANGEROUS. Avoid it.

Does anyone have the probability percentage for nuclear meltdown when using nuclear power? I ask because I have never seen that happen in my games.

 

[madscientist]

Does anyone have the probability percentage for nuclear meltdown when using nuclear power? I ask because I have never seen that happen in my games.

To be honest, I have never built one myself. I have heard enough stories about them on these forums so I avoid them.

 

[Dirk1302]

I build lots of Nuclear plants and never had meltdown, maybe i haven't played enough on BTS, unhealthiness from Coal plants is huge.

 

[Maben]

I build lots of Nuclear plants and never had meltdown, maybe i haven't played enough on BTS, unhealthiness from Coal plants is huge.

Same, a lot of times I NEED to use the Nuclear plants because the Coal unhealthiness would be suicide for my city, and I can't afford to wait for the eventual Hydro plant. Do you need to be on a river to build a Hydro plant? I never really noticed if you did or not.

Anyone else also trade away coal/oil sometimes until you need it when you get your factory? I do this a lot to avoid unhealthiness for a short while.

 

[madscientist]

Perhaps I should rethink the nuclear issue.

Another point is a delay Fission until very late, so I generally have Plastics first.

And yes, hydroplants require your city be on a river (Likewise the 3-Gorges Dam wonder).

 

[shyuhe]

The AI will build nuke plants and I've seen them melt down. It's how you can get global warming without launching a single nuke.

The individual percent of meltdown is not high but it's checked each turn for the rest of the game for each nuke plant so if you build nuke plants in all your cities, you'll probably get a meltdown every 2-3 games.

 

[Gliese 581]

Will you still get the unhealthiness penalty from a coal plant if you later build a hydro plant or T3G?

 

[madscientist]

Will you still get the unhealthiness penalty from a coal plant if you later build a hydro plant or T3G?

The +2 unhealthiness goes away if you build the 3-gorges dam or a hydrodam or a nuclear plant).

 

[xanadux]

There is a post somewhere giving the % chance of a meltdown. I can't remember what it is, but I think it is on the order of 0.1% or 0.2% per turn for each plant. This is small, but over a lot of cities and turns can add up. Suppose you have 10 cities with nuclear plants and the odds are 0.1% ... you can expect a meltdown on average once every 100 turns. Build them in 20 cities, and over 200 turns, you can expect 4 meltdowns on average. (All assuming I am right about the 0.1%).

 

[madscientist]

There is a post somewhere giving the % chance of a meltdown. I can't remember what it is, but I think it is on the order of 0.1% or 0.2% per turn for each plant. This is small, but over a lot of cities and turns can add up. Suppose you have 10 cities with nuclear plants and the odds are 0.1% ... you can expect a meltdown on average once every 100 turns. Build them in 20 cities, and over 200 turns, you can expect 4 meltdowns on average. (All assuming I am right about the 0.1%).

That is the thread I was referring to and I think your estimated are near the mark. In standra dspeed 200 turns is half the game. In marathon speed which I play it's not that long.

 

[Refar]

The chance is 1 in 2000 which is 0,05%

 

[jkp1187]

Is this figure editable via XML? If so, which file?

 

[Il Corvo Bianco]

Every time (and I say EVERY time) i built a nuclear plant, it melted. So I don't build it anymore.

 

[Refar]

Civ4BuildingsInfos.XML the tag says something about "NukeExplosionRand" (i think it's longer) just look for the 2000 in the Nuclear Plant definition... Its allways a chance of 1 in #### Wahtever you fill in there, so setting it higher reduces the chances, except that setting it to "0" removes the Meltdown possibility completely.

Btw. this is checked for every building that has a other Value than "0" in this tag, not just the Nuclear Plant. So you can make your Granary to meltdown every now and then. Those dust explosions can be really mean

 

[Gooblah]

Btw. this is checked for every building that has a other Value than "0" in this tag, not just the Nuclear Plant. So you can make your Granary to meltdown every now and then. Those dust explosions can be really mean

Wow, Refar, that rocked! Hmm.

"Sir! Stonehenge was discovered to have a fission reactor! Turns out the stones were containment facilities used by the Advanced Ancient Druids!"
"And you found that out how?"
"You know that mushroom cloud two hours ago accompanied by the screams of Druids everywhere?"
"Yeah..."
"The techs apologize."

Okay, a bit corny/stupid, but still.

And not to be totally off topic, I wish at times it would stack, but whatever. Factories get 2 unhealthiness for any power, not just Coal. Coal just gives more.

 

[greenie]

I have had 2 meltdowns in my latest game in fairly quick order (about 10 turns apart in the modern era). Even though my army of workers was large enough to clean up the fallout that same turn, global warming happens after the first.

GW in Civ IV is a fairly good reason to NOT build Nuclear plants EVER in Civ IV

 

[Sempronio]

I thought the meltdown could only happen when a city is in revolt, is this not the case?