Judging by Entergy's several years worth of security failures at Palisades, and breaches going back over a decade at other Entergy nuclear power plants such as Indian Point near New York City, the answer to that question is quite dubious.
Beyond Nuclear has published a backgrounder chronicling Entergy security problems at Palisades and Indian Point, and the lethal, and potentially catastrophic risks, at stake. See the PDF, as well as the Word version (containing live links to various documents cited).
The backgrounder was prompted by an NRC Confirmatory Order that went into effect on August 22nd.
Security risks include the on-site storage of high-level radioactive waste. Palisades' pool is vulnerable to a catastrophic release of hazardous radioactivity due to a waste fire; the outdoor dry cask storage is not designed to withstand terrorist attacks, as with anti-tank missiles.
The Kalamazoo Gazette's Yvonne Zipp has also reported on this issue, in an article entitled "Safety culture of Palisades Nuclear Plant's security department scrutinized after ex-guards raise concerns." The article is one in a multi-part series appearing this week.