(Adds Forsmark 3's delayed installation of a generator to 2015 from 2014)     OSLO, Feb 18 (Reuters) - Sweden's 1,170-megawatt (MW) Forsmark-3 nuclear reactor will have a new generator installed in 2015 rather than in 2014 as earlier planned, its operator told the Nordic power bourse on Tuesday.     The reactor is supposed to undergo maintenance on Aug. 2-15, 2015 but the rescheduling of the work originally due this year means increased uncertainty about the dates of the outage in 2015, Forsmark Kraftgrupp AB said in a market message.         The following table lists Nordic nuclear units, installed and available net capacity in megawatts, dates for the end of outages and planned maintenance duration.            UNIT        INSTALLED    AVAILABLE    RETURN TO NORMAL    MAINTENANCE PLANNED                     CAPACITY     CAPACITY                         SWEDEN                                                                     Forsmark-1          984          984               -           Apr 23-May 14, 2014  Forsmark-2         1,120        1,120              -           May 25-Jun 17, 2014  Forsmark-3         1,170        1,170              -            Aug 2-Aug 15, 2015  Oskarshamn-1        473           0        Jan 30, 2100 GMT     Mar 31-May 14, 2014  Oskarshamn-2        638           0          Sept 12, 2014              -  Oskarshamn-3       1,400        1,300*             -           May 4-June 30, 2014  Ringhals-1          878          878               -           Mar 23-Jun 11, 2014  Ringhals-2           865        807**              -           Aug 16-Sept 26, 2014  Ringhals-3         1,063        1,063              -           May 14-Jun 24, 2014  Ringhals-4          940          940               -            Aug 6-Oct 13, 2014  FINLAND                                                                 -  Olkiluoto-1         880          880               -           May 11-May 27, 2014  Olkiluoto-2         880          880               -            Jun 1-Jun 9, 2014  Loviisa-1           496          496               -           July 20-Aug 11, 2014  Loviisa-2           496          496               -           Aug 16-Sept 19, 2014  TOTAL              12,283       11,014                                        * - Oskarshamn-3 maximum power will vary between 1,200 MW and 1,400 MW until annual maintenance in 2014.     ** - Ringhals-2 maximum power will be limited to around 807 MW until annual maintenance planned in 2015.       Sources: Nord Pool Spot, Vattenfall AB, E.ON AG, Fortum Oyj, Teollisuuden Voima Oyj (TVO)      For full outage data on the Nordic power market click on the following link: 
  http://umm.nordpoolspot.com/
    (Reporting by Nerijus Adomaitis; editing by Jason Neely)  ((nerijus.adomaitis@thomsonreuters.com)(+47 9027 6699)(Reuters Messaging: nerijus.adomaitis.thomsonreuters@reuters.net))  Keywords: NORDIC NUCLEAR/