I don't think any student should be permitted to graduate from high school until they can pronounce nuclear correctly. I feel the same way about a few other words. Heading the list is youse, which, admittedly, is more of a grammatical than a pronunciation problem. I've complained about youse before, and about that seemingly vast segment of the population in the northeast whose members are certain that youse is the plural of you. The use of youse is a curse that consigns the user to a lifetime of jobs nobody else wants.
Picture is another simple word that seems to pose complex problems for so many people.
Their cameras take pitchers, not pictures. I've tried to explain the difference in a kindly way to a number of people and never gotten anything more than a dirty look in return for my interest. Once a woman with an advanced degree argued that pitcher was an acceptable usage, even though it never showed up in a dictionary. I don't know. I only mention these words because they're heard so often.