Um, no. The scientific studies are done. There has been 20 years of scientific studies. The DOE, who was responsible for the construction and most of the studies, has reviewed the data - and in their opinion, the Yucca site is acceptable. Under DOE standards, the site is safe, all issues have been addressed, all the data is in and the place has been studied to death.
The President has agreed with the DOE. Nevada has disagreed with the DOE. The Congress will decide if they agree with the DOE in light of their overdue obligation to provide a storage site. If Congress decides to not use Yucca, the Nuclear industry will go to court to get their money back (and its a lot). If Congress agrees with the DOE, then the EPA will set up standards and rules, based on the studies. The NRC will then decide whether or not to issue a license, based on the studies and the EPA standards. Part of the license will probably include a requirement to monitor water and seismic issues during operation. Part of the licensing may question the studies that have already been conducted, which may result in more studies.
However, the studies are done. They may be clarified by related studies, but the main studies are done. There are some 300 issues that require clarification before the NRC will issue a license, some of which may require additional studies.