▁del ays ▁and ▁cost ▁over run s . ▁ ▁The ▁cert ified ▁construction ▁& ▁capital ▁costs ▁in cur red ▁by ▁Georgia ▁Power ▁for ▁these ▁two ▁new ▁units ▁were ▁originally ▁$ 1 4 ▁billion , ▁according ▁to ▁the ▁Se vent e enth ▁Sem i - ann ual ▁Vog t le ▁Const ruction ▁Mon itor ing ▁Report ▁in ▁ 2 0 1 7 . ▁This ▁last ▁report ▁bl ames ▁the ▁latest ▁increase ▁of ▁costs ▁on ▁the ▁contract or ▁not ▁comple ting ▁work ▁as ▁scheduled . ▁ ▁Another ▁comp lic ating ▁factor ▁in ▁the ▁construction ▁process ▁is ▁the ▁bank rupt cy ▁of ▁West ing house ▁in ▁ 2 0 1 7 . ▁In ▁ 2 0 1 8 ▁costs ▁were ▁estimated ▁to ▁be ▁about ▁$ 2 5 ▁billion . ▁Upon ▁completion ▁of ▁Units   3   and   4 ▁in ▁ 2 0 2 1 , ▁Vog t le ▁will ▁become ▁the ▁largest ▁nuclear ▁power ▁station ▁in ▁the ▁United ▁States . ▁ ▁Re actor ▁data ▁The ▁Vog t le ▁Electric ▁Gener ating ▁Plant ▁has ▁two ▁oper ational ▁react ors ▁with ▁two ▁additional ▁units ▁under ▁construction . ▁ ▁Power ▁u pr ate ▁In ▁ 2 0 0 8 , ▁both ▁react ors ▁were ▁increased ▁in ▁power ▁by ▁ 1 . 7 % ▁by ▁an ▁" Append ix   K " ▁u pr ate , ▁also ▁called ▁a ▁Me asure ment ▁Un certain ty ▁Rec apt ure ▁( M UR ) ▁u pr ate . ▁Me asure ment ▁uncertainty ▁re capt ure ▁power ▁u pr ates ▁are ▁less