10 CFR 50.71(e) - Maritime Administration - U.S. Department of ...

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Major drydocking work completed:Updated Final Safety Analysis Report – (STS-004-002) Underwater hull cleaning, surface preparation and coating; Inspection and repair of 1994 hull repairs; Freeboard preservation from deep loadline to top of the rails; Topside and superstructure preservation including weather exposed decks; Audio gauge exterior hull, decks, superstructure, tank tops and tanks; Cathodic protection system; service and repair; Removed ship's propeller and stored it on No. 7 cargo hold hatch cover; Permanently sealed and capped the stern tube opening after removal of the propeller; Examined, tested and repaired (as required) all hull blanks; Examined and repaired as required bilge keel and bilge strake rivets; Performed miscellaneous steel renewals, as needed, to side shell, bottom and main deckplating; Removed ceramic tiles and magnesite underlayment from the Promenade Deck to permitinspection, repair and coating of underlying steel decks; Internally inspected double bottom ballast tanks, forward and after peak tanks, No. 1 DeepTank, and various voids and pipe tunnels; Replaced the weathertight seals on main deck hatch covers at cargo holds 1, 2, 3, 4 and 7.In summary, the structural condition of the ship was found to be very good. In particular, theinnerbottom structure was found to have little-to-no structural degradation, and the original tankcoatings were found intact and serviceable. All major hull strength components were inspected,repaired if necessary, and coated for long-term preservation. The thorough inspections and surveysof the ship's structural condition were documented to provide a baseline for the balance of theprotective storage period.On May 8, 2008, the NSS was moved to Pier 13, Canton Marine Terminal at 4601Newgate Ave.,Baltimore, MD. Maintenance activities continued once the ship was moved to its Baltimorelayberth. From that point onward, the maintenance strategy focused on routine preventativemaintenance, and restoration of ship systems and equipment necessary for husbanding the ship, andlong-term retention. In addition, discrete activities were performed to provide for more secureaccess control, security surveillance, and protection of shipboard personnel. Infrastructureimprovements required to employ shipboard habitability areas for routine administrative purposessuch as offices and meeting rooms are ongoing.Completed and Ongoing Maintenance Activities at Layberth:Modification of port-side Passenger Sideport for secure daytime access;Modification of Stateroom A-18 to Ship Security Office (adjacent to sideport);Installed a new security gate key fob reader pad system at the sideport entrance;Reactivated the General Alarm to be audible throughout the ship;Cleaned and painted numerous interior areas of the ship;Gutted three adjoining crew staterooms on B Deck and converted area to RadiologicalControl Station;Gutted six adjoining crew staterooms on C Deck and converted area to a Records Vault;HVAC installation on "B" Deck for offices / conference room; and "C" Deck TechnicalLibrary and Baggage Room (document storage);Electrical distribution system surveys and inspections; restoration of interior and exteriorlighting; and,Rev. VI 16
Updated Final Safety Analysis Report – (STS-004-002)Repairs to aft mooring capstans and controllers.1.3.3 Radiological and Environmental Characterization Scoping SurveyIn September 2005, a radiological and environmental characterization scoping survey of the NSSwas conducted. This characterization task was intended to provide a basis for estimating the cost ofdecommissioning. It is documented in NSS Radiological and Non-Radiological SpacesCharacterization Survey Report and further described in Chapter 13.The principle findings of the characterization scoping survey include the following:The CV entries were the first in over thirty years. The observed conditions generally supportedthe reported conditions of 1976. However, discrepancies were noted such as presence ofhydraulic oils, migration of primary system water, significant quantities of trash/debris andsuperficial surface corrosion of components and lighting fixtures.Absence of fission products (other than trace quantities of cesium-137), uranium and itsdaughter isotopes, as well as transuranics (e.g., plutonium), indicates there were no significantfuel failures;Crud contribution to total curie content is minimal;No contamination was found in the non-radiological spaces;Minimal contamination was found in radiological spaces;Overall dose rates were much lower than expected;Sites previously identified as radiologically contaminated were found uncontaminated; and,Containment vessel systems, structures and components were exceptionally radiologicallyclean.The scoping survey concluded that the NSS is in very good condition from a radiological perspectiveto support decommissioning. Note that during the assessment approximately 1500 gallons werefound in the primary system. This volume is approximately 15% of the normal operating watervolume of the system (approximately 10,000 gallons).1.3.4 Current Status of N.S. SAVANNAH April 2009 to presentThe ship is in a state of protective storage.In November 2010, electrical system modifications were completed. These included deenergizingall originally installed 450 volt switchgear. All required 450/480 volt loads were moved to a new800A Shore Power Switchboard.Rev. VI 17
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