▁but ▁has ▁two ▁major ▁dis adv antages : ▁It ▁limits ▁the ▁maximum ▁temperature ▁( to ▁about ▁ 4 1 5 C el si us ), ▁and ▁hence ▁the ▁thermal ▁efficiency , ▁of ▁the ▁plant . ▁It ▁react s ▁with ▁water , ▁prevent ing ▁long - term ▁storage ▁of ▁spent ▁fuel ▁under ▁water ▁in ▁spent ▁fuel ▁po ols . ▁ ▁The ▁mag no x ▁al loy ▁Al 8 0 ▁has ▁a ▁composition ▁of ▁ 0 . 8 % ▁al umin ium ▁and ▁ 0 . 0 0 4 % ▁b ery l li um . ▁ ▁See ▁also ▁ ▁Mag no x ▁nuclear ▁power ▁react ors . ▁ ▁References ▁ ▁Category : M agn es ium ▁allo ys ▁Category : N uc lear ▁materials ▁Category : Named ▁allo ys ▁Category : Al umin ium – m agn es ium ▁allo ys ▁Category : Al umin ium ▁allo ys <0x0A> </s> ▁" Old ▁Sultan " ▁() ▁is ▁a ▁German ▁fair y ▁tale ▁collected ▁by ▁the ▁Brothers ▁Gr imm , ▁tale ▁number ▁ 4 8 . ▁It ▁comb ines ▁three ▁different ▁A ar ne – Th om pson ▁types : ▁ 1 0 1 , ▁the ▁old ▁dog ▁res c ues ▁the ▁child ; ▁ 1 0 3 , ▁wild ▁animals ▁hide ▁from ▁an ▁un famil iar ▁animal ; ▁and ▁ 1 0 4 , ▁the ▁war ▁between ▁the ▁village ▁animals ▁and ▁the ▁forest ▁animals . ▁ ▁Syn opsis ▁A ▁far mer ' s ▁dog ▁named ▁Sultan ▁had ▁grown ▁old . ▁One ▁day ▁the ▁far mer