Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Amurka ta haɓaka tsarin samar da musayar sinadarai na Girdler sulfide wanda aka fara nunawa a kan babban sikelin a Dana, masana'antar Indiana a 1945 da kuma a Savannah River Plant, South Carolina a 1952. DuPont ya gudanar da SRP don USDOE har zuwa 1 ga Afrilu 1989, lokacin da Westinghouse ya karbe shi.  Tambaya: Yaushe Dupont ya yi aiki har zuwa USDOE?
1 ga Afrilu 1989