This report presents preliminary planning information which supplements two prior special reactor study reports. It is the purpose of this study to consider expedited reactivation of reactors and to evaluate the factors which are likely to be controlling to, or have a major influence on the time required to reactivate one or more of Hanford`s six small reactors after an assumed period in the lay-away status. It is assumed that the methods to be applied in preserving and protecting inactive equipment and facilities will be such that the plants which are shut down will to the greatest extent practicable, be laid away with all essential equipment and systems assembled and in an operable state of repair. It should be noted that, at best, the data presented herein represents ``educated guesses``. No rigorous development of specifications, procedures, or technical bases for laying away or reactivating these reactors has been undertaken.