<prompt> Pedzisa mutsara unotevera: A reactor magadzirirwo ane inherently yakachengeteka muitiro zvakananga anopa passive kuchengeteka chinoumba panguva chaiyo kukundikana ezvinhu ari zvose kushanda modes iri yemanyorero anorondedzerwa somunhu nokure kukundikana-vakachengeteka kuti kukundikana ezvinhu. Zvisinei vakawanda ano mvura-dzaserera uye -moderated reactors, apo scrammed, havagoni kubvisa residual kugadzirwa uye kuora kupisa pasina kana muitiro kupisa kuchinjirwa kana vanoshingaira kutonhora hurongwa. Nemamwe mashoko, nepo muitiro wokupisa unochengeteka unogovera chinhu chinodzivirira kudzivirira kupisa kwakanyanyisa apo reactor iri kushanda, muitiro mumwe chetewo wokupisa unochengeteka haupi chinhu chinodzivirira kudzivirira kana reactor ichidzimwa SCRAMed. Nhamba  <response>: Tsaona yeThree Mile Island yakafumura uku kukundikana kwegadziriro: reactor negadziriro yemhepo yakavharwa asi nokurasikirwa nemvura inotonhorera yakatambura kuparara kwechikamu. 