Where can I get maps and charts showing current data regarding the
major sources of Nuclear energy in the U.S. and the relative amount of
energy they each provide? How much energy does each Nuclear Plant in
the U.S. provide?

Hello Wolfie253,
This first link has a map on the 103 nuclear plants currently
operating in the United States. The link below the green map will
bring you to more details about the plant locations.

Nuclear Reactor and Power Plant information, Maps, locations, fallout
areas
http://www.nukepills.com/pages/677705/index.htm

Here is a site that contains information on the individual output of
nuclear power plants in the United States. It takes some clicking into
each region to get the profiles for each plant:

North America NukeWorker.com - North America page
http://www.nukeworker.com/nuke_facilities/North_America/

Other sources:
United States Reactor Information (some of the links to the companies
are dead, though)
http://www.nucleartourist.com/us/us1.htm

US Nuclear power Industry Report - shows some outputs of certain
nuclear plants
http://www.uic.com.au/nip58.htm

NEI - U.S. Nuclear Power Plant Performance
http://www.nei.org/index.asp?catnum=3&catid=37

Here is a document on about 2000 total nuclear output by the American
Nuclear Society
http://www.ans.org/pubs/magazines/nn/pdfs/2001-5-2.pdf

Google search terms:
us nuclear plant map 
us nuclear plant output 
us nuclear plant individual output
united states nuclear plant list

I hope the information here has been helpful. If there is any problem
with the answer for you, please post it as a request for
clarification. Thank you.

The US Nuclear Regulatory Commission has maps and lists of all active
nuclear power plants. It does not appear to have any figures on
amounts of energy generated. My guess is that the data for each plant
would need to be investigated individually.

Map
http://www.nrc.gov/reactors/operating/map-power-reactors.html

List
http://www.nrc.gov/reactors/operating/list-power-reactor-units.html

I've found some more info, but I feel it doesn't quite provide what
you are after...

Nuclear’s Share of Total U.S. Electricity Generation (1973-2001)
http://www.nei.org/documents/US_Electric_Generation_with_Nuclear_Share.pdf

U.S. Nuclear Generation (state-by-state, 2000)
http://www.nei.org/documents/State_by_State_Nuclear_Output_2000.pdf

A list showing each site's capacity:
http://eia.doe.gov/cneaf/nuclear/page/nuc_reactors/operational.html

A list of plants ordered by state (click on the links to see their
2001 production figure):
http://www.eia.doe.gov/cneaf/nuclear/page/at_a_glance/reactors/states.html

There might be some more info somewhere within this great site:
http://www.nucleartourist.com/