▁the ▁tur bine ▁is ▁taken ▁to ▁re he at ▁cool ant ▁before ▁the ▁de a er ator ▁and ▁the ▁steam ▁generator . ▁Water ▁in ▁this ▁circuit ▁is ▁not ▁supposed ▁to ▁be ▁radio active . ▁ ▁T ert i ary ▁cool ing ▁circuit ▁and ▁district ▁he ating ▁▁ ▁The ▁t ert i ary ▁cool ing ▁circuit ▁is ▁an ▁open ▁circuit ▁diver ting ▁water ▁from ▁an ▁outside ▁res er voir ▁such ▁as ▁a ▁lake ▁or ▁river . ▁Ev apor ative ▁cool ing ▁to wers , ▁cool ing ▁bas ins ▁or ▁p onds ▁transfer ▁the ▁waste ▁heat ▁from ▁the ▁generation ▁circuit ▁into ▁the ▁environment . ▁ ▁In ▁most ▁V VER s ▁this ▁heat ▁can ▁also ▁be ▁further ▁used ▁for ▁resident ial ▁and ▁industrial ▁he ating . ▁Oper ational ▁examples ▁of ▁such ▁systems ▁are ▁Boh un ice ▁N PP ▁( S lov ak ia ) ▁supp lying ▁heat ▁to ▁the ▁towns ▁of ▁Tr n ava ▁( 1 2   km ▁away ), ▁Leopold ov ▁( 9 . 5   km ▁away ), ▁and ▁H lo h ove c ▁( 1 3   km ▁away ), ▁and ▁Tem el ín ▁N PP ▁( C zech ▁Republic ) ▁supp lying ▁heat ▁to ▁T ý n ▁nad ▁V lt av ou ▁ 5   km ▁away . ▁Pl ans ▁are ▁made ▁to ▁supply ▁heat ▁from ▁the ▁D uk ov any ▁N PP ▁to ▁Br no ▁( the ▁second - larg est ▁city ▁in ▁the ▁Czech ▁Republic ), ▁covering ▁two - third s ▁of ▁its ▁heat ▁needs . ▁ ▁Saf ety