In the report, they note that they assume that LENR works for the purposes of the report, and do not examine that matter explicitly (although noting the Widom-Larsen theory). Perhaps the most interesting part is the examination of methods of converting the heat energy from LENR into something that can be used for propulsion. They also project that it will be 10 years before significant investing in the field occurs.
So if NASA thinks it will be 10 years, it will likely be only 5, God Willing. Scientists always overestimate who long it will take engineers to make theory into reality.