Below is a summary of some of the notable aspects of the Office of Science data management policies.
The subprograms have very different requirements - read them carefully.
The Office of Science is the main funding arm of the Department of Energy. If you are applying to a grant from another branch make sure to check the data management plan requirements - they should be specified in the solicitation.
Get a DOI (digital object identifier) for your DOE sponsored research data. The service is free for DOE researchers and research.