Power uprates across the fleet

Name: Nuclear reactors operating above or below their design net capacity
Creator: NuclearChain
License: https://creativecommons.org/licenses/by/4.0/

180 of 419 operating reactors run at a net capacity above the level their design was originally rated at, adding 11,523 MW across the fleet. 49 run below their design rating, a net 1,204 MW short.

GNPT records two net-capacity figures per unit: what the design was originally rated at, and the reference net capacity it actually runs at today. Where the two differ, an uprate (or derate) has already taken effect; this is not a forecast, and it says nothing about pending or future licence applications. Units missing either figure are left out rather than assumed unchanged, so the totals below are a floor, not a full count.

Uprated

Running above the original design rating, largest gain first.

Unit	Country	Design net MW	Current net MW	Gain	%
Oskarshamn nuclear power plant 3	Sweden	1,050	1,400	+350	+33.3%
Leibstadt nuclear power plant	Switzerland	960	1,233	+273	+28.4%
Peach Bottom nuclear power plant 3	United States	1,065	1,331	+266	+25.0%
Peach Bottom nuclear power plant 2	United States	1,065	1,300	+235	+22.1%
Olkiluoto nuclear power plant 1	Finland	660	890	+230	+34.8%
Olkiluoto nuclear power plant 2	Finland	660	890	+230	+34.8%
Forsmark nuclear power plant 2	Sweden	900	1,121	+221	+24.6%
Susquehanna nuclear power plant 1	United States	1,065	1,257	+192	+18.0%
Susquehanna nuclear power plant 2	United States	1,065	1,257	+192	+18.0%
Nine Mile Point nuclear power plant 2	United States	1,100	1,277	+177	+16.1%
Ringhals nuclear power plant 3	Sweden	915	1,074	+159	+17.4%
St. Lucie nuclear power plant 2	United States	830	987	+157	+18.9%
Grand Gulf nuclear power plant 1	United States	1,250	1,401	+151	+12.1%
St. Lucie nuclear power plant 1	United States	830	981	+151	+18.2%
Browns Ferry nuclear power plant 3	United States	1,065	1,210	+145	+13.6%
Turkey Point nuclear power station 3	United States	693	837	+144	+20.8%
Forsmark nuclear power plant 1	Sweden	900	1,040	+140	+15.6%
Browns Ferry nuclear power plant 1	United States	1,065	1,200	+135	+12.7%
Browns Ferry nuclear power plant 2	United States	1,065	1,200	+135	+12.7%
Turkey Point nuclear power station 4	United States	693	821	+128	+18.5%
Cofrentes nuclear power plant	Spain	939	1,064	+125	+13.3%
Forsmark nuclear power plant 3	Sweden	1,050	1,172	+122	+11.6%
Quad Cities nuclear power plant 2	United States	789	911	+122	+15.5%
Quad Cities nuclear power plant 1	United States	789	908	+119	+15.1%
Vandellos nuclear power plant 2	Spain	930	1,047	+117	+12.6%
Brunswick nuclear power plant 1	United States	821	938	+117	+14.3%
Clinton nuclear power plant 1	United States	950	1,062	+112	+11.8%
Almaraz nuclear power plant 1	Spain	900	1,011	+111	+12.3%
Brunswick nuclear power plant 2	United States	821	932	+111	+13.5%
Ascó nuclear power plant 2	Spain	888	997	+109	+12.3%
Ascó nuclear power plant 1	Spain	888	995	+107	+12.0%
Almaraz nuclear power plant 2	Spain	900	1,006	+106	+11.8%
Hope Creek nuclear power plant 1	United States	1,067	1,172	+105	+9.8%
Dresden nuclear power plant 2	United States	794	894	+100	+12.6%
Edwin I Hatch nuclear power plant 1	United States	777	876	+99	+12.7%
Edwin I Hatch nuclear power plant 2	United States	784	883	+99	+12.6%
Seabrook nuclear power plant 1	United States	1,149	1,246	+97	+8.4%
Point Beach nuclear power plant 1	United States	497	591	+94	+18.9%
Point Beach nuclear power plant 2	United States	497	591	+94	+18.9%
Hanbit nuclear power plant 1	South Korea	903	995	+92	+10.2%
Goesgen nuclear power plant	Switzerland	920	1,010	+90	+9.8%
Palo Verde nuclear power plant 1	United States	1,221	1,311	+90	+7.4%
Robert Emmett Ginna nuclear power plant	United States	470	560	+90	+19.1%
Loviisa nuclear power plant 1	Finland	420	507	+87	+20.7%
Loviisa nuclear power plant 2	Finland	420	507	+87	+20.7%
Hanbit nuclear power plant 2	South Korea	903	988	+85	+9.4%
Dresden nuclear power plant 3	United States	794	879	+85	+10.7%
Monticello nuclear power plant	United States	545	628	+83	+15.2%
Limerick nuclear power plant 1	United States	1,055	1,134	+79	+7.5%
Limerick nuclear power plant 2	United States	1,055	1,134	+79	+7.5%
Salem nuclear power plant 1	United States	1,090	1,169	+79	+7.2%
Saeul nuclear power plant 2	South Korea	1,340	1,418	+78	+5.8%
Saeul nuclear power plant 1	South Korea	1,340	1,416	+76	+5.7%
Arkansas Nuclear One nuclear power plant 2	United States	912	988	+76	+8.3%
Shin-Hanul nuclear power plant 1	South Korea	1,340	1,414	+74	+5.5%
Braidwood nuclear power plant 1	United States	1,120	1,194	+74	+6.6%
Beaver Valley nuclear power plant 1	United States	835	908	+73	+8.7%
Virgil C Summer nuclear power plant 1	United States	900	973	+73	+8.1%
Paks nuclear power plant 1	Hungary	408	479	+71	+17.4%
Paks nuclear power plant 2	Hungary	410	479	+69	+16.8%
Paks nuclear power plant 3	Hungary	410	479	+69	+16.8%
Paks nuclear power plant 4	Hungary	410	479	+69	+16.8%
Beaver Valley nuclear power plant 2	United States	836	905	+69	+8.3%
Donald C Cook nuclear power plant 2	United States	1,100	1,168	+68	+6.2%
Hanul nuclear power plant 2	South Korea	903	967	+64	+7.1%
Shearon Harris nuclear power plant 1	United States	900	964	+64	+7.1%
Waterford nuclear power plant 3	United States	1,104	1,168	+64	+5.8%
Hanul nuclear power plant 1	South Korea	903	966	+63	+7.0%
LaSalle nuclear power plant 2	United States	1,078	1,140	+62	+5.8%
Mochovce nuclear power plant 2	Slovakia	408	469	+61	+15.0%
Tianwan nuclear power plant 3-5	China	1,000	1,060	+60	+6.0%
Tianwan nuclear power plant 3-6	China	1,000	1,060	+60	+6.0%
Mochovce nuclear power plant 1	Slovakia	408	467	+59	+14.5%
LaSalle nuclear power plant 1	United States	1,078	1,137	+59	+5.5%
Daya Bay nuclear power plant 2	China	930	986	+56	+6.0%
Krško nuclear power plant 1	Slovenia	632	688	+56	+8.9%
Comanche Peak nuclear power plant 1	United States	1,150	1,205	+55	+4.8%
Diablo Canyon nuclear power plant 1	United States	1,084	1,138	+54	+5.0%
Joseph M Farley nuclear power plant 2	United States	829	883	+54	+6.5%
Dukovany nuclear power plant 2	Czech Republic	420	471	+51	+12.1%
Dukovany nuclear power plant 4	Czech Republic	420	471	+51	+12.1%
Alvin W Vogtle nuclear power plant 2	United States	1,101	1,152	+51	+4.6%
Millstone nuclear power plant 3	United States	1,159	1,210	+51	+4.4%
Kozloduy nuclear power plant 5	Bulgaria	953	1,003	+50	+5.2%
Surry nuclear power plant 1	United States	788	838	+50	+6.3%
Surry nuclear power plant 2	United States	788	838	+50	+6.3%
Hanul nuclear power plant 4	South Korea	950	999	+49	+5.2%
Dukovany nuclear power plant 1	Czech Republic	420	468	+48	+11.4%
Dukovany nuclear power plant 3	Czech Republic	420	468	+48	+11.4%
Hanul nuclear power plant 5	South Korea	950	998	+48	+5.1%
Hanul nuclear power plant 6	South Korea	950	997	+47	+4.9%
Shin-Wolsong nuclear power plant 1	South Korea	950	997	+47	+4.9%
Bruce nuclear power plant A2	Canada	732	777	+45	+6.1%
Chooz nuclear power plant B-1	France	1,455	1,500	+45	+3.1%
Chooz nuclear power plant B-2	France	1,455	1,500	+45	+3.1%
Civaux nuclear power plant 1	France	1,450	1,495	+45	+3.1%
Civaux nuclear power plant 2	France	1,450	1,495	+45	+3.1%
Comanche Peak nuclear power plant 2	United States	1,150	1,195	+45	+3.9%
Joseph M Farley nuclear power plant 1	United States	829	874	+45	+5.4%
Haiyang nuclear power plant 1-1	China	1,126	1,170	+44	+3.9%
Haiyang nuclear power plant 1-2	China	1,126	1,170	+44	+3.9%
Byron nuclear power plant 1	United States	1,120	1,164	+44	+3.9%
Callaway nuclear power plant 1	United States	1,171	1,215	+44	+3.8%
Shin-Wolsong nuclear power plant 2	South Korea	950	993	+43	+4.5%
Salem nuclear power plant 2	United States	1,115	1,158	+43	+3.9%
Bruce nuclear power plant A1	Canada	732	774	+42	+5.7%
Hanbit nuclear power plant 5	South Korea	950	992	+42	+4.4%
Armenian nuclear power plant 2	Armenia	375	416	+41	+10.9%
H. B. Robinson nuclear power plant 2	United States	700	741	+41	+5.9%
North Anna nuclear power plant 1	United States	907	948	+41	+4.5%
Braidwood nuclear power plant 2	United States	1,120	1,160	+40	+3.6%
Rostov nuclear power plant 1	Russia	950	989	+39	+4.1%
Doel nuclear power plant 4	Belgium	1,000	1,038	+38	+3.8%
Qinshan nuclear power plant 1-1	China	289	326	+37	+12.8%
North Anna nuclear power plant 2	United States	907	944	+37	+4.1%
Hanbit nuclear power plant 3	South Korea	950	986	+36	+3.8%
Chinon nuclear power plant B-1	France	870	905	+35	+4.0%
Chinon nuclear power plant B-2	France	870	905	+35	+4.0%
Cruas nuclear power plant 1	France	880	915	+35	+4.0%
Cruas nuclear power plant 3	France	880	915	+35	+4.0%
Cruas nuclear power plant 4	France	880	915	+35	+4.0%
Saint-Laurent nuclear power plant B-2	France	880	915	+35	+4.0%
Leningrad nuclear power plant 2-1	Russia	1,066	1,101	+35	+3.3%
Leningrad nuclear power plant 2-2	Russia	1,066	1,101	+35	+3.3%
Perry nuclear power plant 1	United States	1,205	1,240	+35	+2.9%
Calvert Cliffs nuclear power plant 1	United States	845	877	+32	+3.8%
Columbia nuclear power plant 1	United States	1,100	1,131	+31	+2.8%
Angra nuclear power plant 2	Brazil	1,245	1,275	+30	+2.4%
South Texas nuclear power plant 1	United States	1,250	1,280	+30	+2.4%
South Texas nuclear power plant 2	United States	1,250	1,280	+30	+2.4%
Wolf Creek nuclear power plant	United States	1,170	1,200	+30	+2.6%
Rostov nuclear power plant 4	Russia	950	979	+29	+3.1%
Alvin W Vogtle nuclear power plant 1	United States	1,122	1,150	+28	+2.5%
Barakah nuclear power plant 1	United Arab Emirates	1,310	1,337	+27	+2.1%
Barakah nuclear power plant 2	United Arab Emirates	1,310	1,337	+27	+2.1%
Barakah nuclear power plant 3	United Arab Emirates	1,310	1,337	+27	+2.1%
Bruce nuclear power plant B8	Canada	795	817	+22	+2.8%
Kori nuclear power plant 2	South Korea	618	640	+22	+3.6%
Fermi nuclear power plant 2	United States	1,093	1,115	+22	+2.0%
Atucha nuclear power plant 1	Argentina	319	340	+21	+6.6%
Bruce nuclear power plant A3	Canada	750	770	+20	+2.7%
Hanbit nuclear power plant 4	South Korea	950	970	+20	+2.1%
Rivne nuclear power plant 1	Ukraine	361	381	+20	+5.5%
Bruce nuclear power plant A4	Canada	750	769	+19	+2.5%
Tihange nuclear power plant 3	Belgium	1,020	1,038	+18	+1.8%
Byron nuclear power plant 2	United States	1,120	1,136	+16	+1.4%
Kudankulam nuclear power plant 1	India	917	932	+15	+1.6%
Kudankulam nuclear power plant 2	India	917	932	+15	+1.6%
Beznau nuclear power plant 1	Switzerland	350	365	+15	+4.3%
Beznau nuclear power plant 2	Switzerland	350	365	+15	+4.3%
Catawba nuclear power plant 1	United States	1,145	1,160	+15	+1.3%
Daya Bay nuclear power plant 1	China	930	944	+14	+1.5%
Qinshan nuclear power plant 2-1	China	610	623	+13	+2.1%
Qinshan nuclear power plant 2-2	China	610	623	+13	+2.1%
Qinshan nuclear power plant 2-3	China	610	623	+13	+2.1%
Qinshan nuclear power plant 2-4	China	610	623	+13	+2.1%
Trillo nuclear power plant 1	Spain	990	1,003	+13	+1.3%
Fangjiashan nuclear power plant 1	China	1,000	1,012	+12	+1.2%
Fangjiashan nuclear power plant 2	China	1,000	1,012	+12	+1.2%
Diablo Canyon nuclear power plant 2	United States	1,106	1,118	+12	+1.1%
Tianwan nuclear power plant 1-1	China	990	1,000	+10	+1.0%
Tianwan nuclear power plant 1-2	China	990	1,000	+10	+1.0%
Kori nuclear power plant 3	South Korea	1,001	1,011	+10	+1.0%
Sizewell nuclear power plant B	United Kingdom	1,188	1,198	+10	+0.8%
Calvert Cliffs nuclear power plant 2	United States	845	855	+10	+1.2%
Palo Verde nuclear power plant 2	United States	1,304	1,314	+10	+0.8%
Koeberg nuclear power plant 2	South Africa	921	930	+9	+1.0%
Palo Verde nuclear power plant 3	United States	1,304	1,312	+8	+0.6%
Heysham nuclear power plant B1	United Kingdom	615	620	+5	+0.8%
Heysham nuclear power plant B2	United Kingdom	615	620	+5	+0.8%
Catawba nuclear power plant 2	United States	1,145	1,150	+5	+0.4%
Sequoyah nuclear power plant 1	United States	1,148	1,152	+4	+0.3%
Madras nuclear power plant 2	India	202	205	+3	+1.5%
Karachi nuclear power plant 3	Pakistan	1,014	1,017	+3	+0.3%
Koeberg nuclear power plant 1	South Africa	921	924	+3	+0.3%
Akademik Lomonosov nuclear power plant 1	Russia	30	32	+2	+6.7%
Akademik Lomonosov nuclear power plant 2	Russia	30	32	+2	+6.7%
Atucha nuclear power plant 2	Argentina	692	693	+1	+0.1%
Shin-Kori nuclear power plant 2	South Korea	995	996	+1	+0.1%
River Bend nuclear power plant 1	United States	966	967	+1	+0.1%

Running below design rating

Fewer units, and usually a smaller gap; this is not necessarily a fault, since a design rating can also be set conservatively.

Unit	Country	Design net MW	Current net MW	Shortfall	%
Heysham nuclear power plant A1	United Kingdom	611	485	-126	-20.6%
Wolsong nuclear power plant 4	South Korea	669	574	-95	-14.2%
Cangnan San'ao nuclear power plant 1-1	China	1,208	1,117	-91	-7.5%
Wolsong nuclear power plant 2	South Korea	652	569	-83	-12.7%
Watts Bar nuclear power plant 1	United States	1,218	1,157	-61	-5.0%
Wolsong nuclear power plant 3	South Korea	665	605	-60	-9.0%
Shidao Bay nuclear power plant 1	China	200	150	-50	-25.0%
Tarapur nuclear power plant 1	India	200	150	-50	-25.0%
Torness nuclear power plant 1	United Kingdom	645	595	-50	-7.8%
Torness nuclear power plant 2	United Kingdom	645	605	-40	-6.2%
Oconee nuclear power plant 1	United States	887	847	-40	-4.5%
Oconee nuclear power plant 2	United States	887	848	-39	-4.4%
Heysham nuclear power plant A2	United Kingdom	611	575	-36	-5.9%
Oconee nuclear power plant 3	United States	887	859	-28	-3.2%
McGuire nuclear power plant 1	United States	1,180	1,158	-22	-1.9%
McGuire nuclear power plant 2	United States	1,180	1,158	-22	-1.9%
Yangjiang nuclear power plant 1	China	1,021	1,000	-21	-2.1%
Yangjiang nuclear power plant 5	China	1,021	1,000	-21	-2.1%
Bugey nuclear power plant 4	France	900	880	-20	-2.2%
Bugey nuclear power plant 5	France	900	880	-20	-2.2%
Rajasthan nuclear power plant 2	India	207	187	-20	-9.7%
Novovoronezh nuclear power plant 2-1	Russia	1,114	1,100	-14	-1.3%
Arkansas Nuclear One nuclear power plant 1	United States	850	836	-14	-1.6%
Borssele nuclear power plant 1	Netherlands	495	482	-13	-2.6%
Novovoronezh nuclear power plant 2-2	Russia	1,114	1,101	-13	-1.2%
Tarapur nuclear power plant 3	India	502	490	-12	-2.4%
Tarapur nuclear power plant 4	India	502	490	-12	-2.4%
Davis Besse nuclear power plant 1	United States	906	894	-12	-1.3%
Prairie Island nuclear power plant 2	United States	530	519	-11	-2.1%
Bugey nuclear power plant 2	France	920	910	-10	-1.1%
Bugey nuclear power plant 3	France	920	910	-10	-1.1%
Cooper nuclear power plant	United States	778	769	-9	-1.2%
Sequoyah nuclear power plant 2	United States	1,148	1,139	-9	-0.8%
Rivne nuclear power plant 2	Ukraine	384	376	-8	-2.1%
James A Fitzpatrick nuclear power plant	United States	821	813	-8	-1.0%
Prairie Island nuclear power plant 1	United States	530	522	-8	-1.5%
Nine Mile Point nuclear power plant 1	United States	620	613	-7	-1.1%
Bruce nuclear power plant B5	Canada	822	817	-5	-0.6%
Bruce nuclear power plant B6	Canada	822	817	-5	-0.6%
Bruce nuclear power plant B7	Canada	822	817	-5	-0.6%
Laguna Verde nuclear power plant 2	Mexico	780	775	-5	-0.6%
Darlington nuclear power plant 1	Canada	881	878	-3	-0.3%
Darlington nuclear power plant 2	Canada	881	878	-3	-0.3%
Darlington nuclear power plant 3	Canada	881	878	-3	-0.3%
Darlington nuclear power plant 4	Canada	881	878	-3	-0.3%
Laguna Verde nuclear power plant 1	Mexico	780	777	-3	-0.4%
Shin-Kori nuclear power plant 1	South Korea	998	996	-2	-0.2%
Millstone nuclear power plant 2	United States	870	869	-1	-0.1%
Watts Bar nuclear power plant 2	United States	1,165	1,164	-1	-0.1%

Sources

Design and reference net capacities: Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06

How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data

Cite this page

NuclearChain. "Power uprates across the fleet." https://nuclearchain.net/uprates/. Accessed 2026. Built on the Global Nuclear Power Tracker, Global Energy Monitor, CC BY 4.0.

Free to reuse under CC BY 4.0 with that attribution. Download the data.