Pedzisa mutsara unotevera:
Kudengenyeka kwenyika kwa2011 uye tsunami yemamita gumi nemashanu kumahombekombe ekumabvazuva kweJapan, chirimwa chemagetsi chenyukireya cheFukushima I chakatambura kukuvara kwepakati pamatatu emagetsi ayo matanhatu mushure mekunge masisitimu ekudzikisira echimbichimbi akundikana nekuda kwemamiriro akanyanya kupfuura dhizaini. Ndiko kuti, michina yeFukushima haina kurangarira tsunami iri pamusoro apa mugadziriro yavo yapakuvamba. Aya mareactor akanga ari mareactor eGeneral Electric BWR-3 neBWR-4 mukati meMark I magadzirirwo ekudzivirira, ayo akajairika muUnited States. Zvisinei, marudzi ose aya ezvirimwa ane magadzirirwo akasiyana-siyana nemhaka yemitemo, zvaunofarira zvaunogona kushandisa, uye nzvimbo yokuvaka. Muna 1995, Sandia National Laboratories yakafungidzira kuti imwe neimwe yeBWR-3 neBWR-4 reactors muUnited States ine kukuvara kwepakati pakati pe10−4 ne10−7.