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

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Updated Final Safety Analysis Report – (STS-004-002)8. Auxiliary Systems - All nuclear related auxiliarysystems have been drained as completely aspractical.The auxiliary system tanks listed in Table 1-2 havebeen drained of liquids. Some still retain nonremovablesurface contamination.The three primary purification system ionexchangers(PP-E1, PP-E2 and PP-E3) and theirresins (28 Ci) have been physically removed fromthe ship and their lines capped.Water from the primary (neutron) shield water tankwas transferred to the double bottom tank below thereactor compartment.9. Containment Vessel - The forward and aft manway PR-T1 - Effluent Condensing Tankshield plugs were put in place with security sealsinstalled. Containment vessel (CV) entries were expected to be made through the aft airlock.The lifting chains and hooks were removed from the chain hoists used to handle the shield plugsto minimize the possibility of unauthorized containment vessel entry. The CV bilge was wipedclean. The inerting piping in the CV cupola head was disconnected outside and valves closedso that the integrity of the vessel was maintained.10. Control Areas - The following areas of the ship are controlled by locking because they containradioactive systems or components:Secured boundaries were established to prevent unauthorized access into Radiation ControlAreas (RCAs). The secured entrances included the following spaces:a. The reactor compartment surrounding the containment vessel that originally formed asecondary containment around the pressure containment;b. The Port and Starboard Stabilizer rooms;c. The Forward Control which includes on C-Deck the Cold Water Chemistry Lab (Port) andRadiation Sampling Room plus on D-deck the Gas Adsorption Equipment Room (port) andRadiation Sampling Room (stbd);d. The Port and Starboard Charge Pump rooms; and,Table 1-2e. The Hot Chemistry Laboratory, in the Control Room Area.Tank DesignationSL-T1 - Buffer Seal Surge TankPD-T1 - Lab Waste TankPD-T2 - Makeup Storage TankPD-T3 - Makeup Storage TankPD-T4 - Containment Drain TankPD-T5 - Double Bottom TankPD-T6 - Double Bottom TankPrimary (Neutron) Shield TankWhen not in use, the entries to all of the above spaces are kept locked and are free of surfacecontamination (less than 450 ρCi/100 cm 2 ) except for the interior of the containment vessel andlower reactor compartment. The containment vessel, port and starboard buffer seal chargepump room and lower reactor compartment bilges were decontaminated, washed, vacuumedand painted in Fall 1971 as part of defueling.A complete survey was made on the ship after removal of the primary system water anddemineralizers (ion-exchangers). Radiation levels in the containment vessel did not increaseappreciably after the water was removed.All loose radioactive material (components and solid waste) was removed from the ship. Atpresent, there is no radioactive or contaminated material outside of control areas.Rev. VI 12
Updated Final Safety Analysis Report – (STS-004-002)The calculated residual radioactivity remaining in the plant as of April 1976 as listed below:SourceActivityActivated components within the Reactor Vessel108486 CiCorrosion and Fission products plated out throughout the system16.6 CiTotal Estimated Residual Activity108513 Ci11. All of the hull openings have been welded closed. The only hull opening with the potential fora leakage path is the main propeller shaft bearing in the stern tube. (2009 -Note that as part ofthe 2008 drydocking work, the stern tube opening was permanently sealed and capped afterremoval of the tail shaft and propeller.)1.3.2 Status of N.S. SAVANNAH from April 1976 – April 2009During the intervening years, the ship has remained in a state of protective storage.In 1981, the NSS was bareboat chartered to the Patriots Point Development Authority (PPDA) of theState of South Carolina, for public display at the Patriots Point Naval and Maritime Museum, nearCharleston, SC. During that period the PPDA was designated a "co-licensee" for the reactor andexercised custody of the ship - but ownership remained with MARAD.Shortly after the second bareboat charter renewal in 1991, a hull leak developed. After a series ofsurveys and inspections, it was concluded in 1993 that deterioration of the underwater hull bodynecessitated a drydocking, for which funding was requested from Congress. Unrelated to theunderwater hull issue was internal deterioration from excessive water intrusion from the upper decks.The water intrusion condition began with Hurricane Hugo in 1989 and gradually worsened overtime. In light of these issues and the effects they had on use of the ship, PPDA informally notifiedthe Agency that it would exercise its right to terminate the charter effective with the ship's removalfor drydocking.Museum operations ended in early 1994, when industrial topside and internal repairs commenced inpreparation for the drydocking and subsequent transfer of the NSS to a reserve fleet. The NSS wasremoved from the museum site on May 24, 1994 and in June 1994 was drydocked in Baltimore, MDfor hull maintenance and repair. Extensive repairs to deteriorated underwater hull plating werecompleted, and in July 1994 the NSS was placed in the Agency's James River Reserve Fleet (JRRF)at Fort Eustis (Newport News), VA. License Amendment 12 was issued in July 1994, and amongother things removed the PPDA as a co-licensee, and established the vessel's location as the JRRF.The NSS remained in protective storage there until August 15, 2006.To prepare the ship for layup at JRRF, a number of conventional preservation measures were put intoplace. These included fitting a Dehumidification (DH) system to preserve the ship’s interior,renovations to the Impressed Current hull Cathodic Protection (ICCP) system, and overhaul of theship’s existing fire, flooding and intrusion alarm systems. These modifications included long runs ofportable ductwork and electrical cabling which generally obstructed the doorways, passageways andladders throughout ship. Externally, deck drains were blanked off to reduce water intrusion into theship’s interior. No funds were available to correct the interior water damage effects; however, theDH did arrest any further degradation.In preparation for, and during the lay-up period at the JRRF, no changes were made to radiologicalsurveillance or monitoring plans and no substantive radiological work was performed. RadiologicalRev. VI 13
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10 CFR 50.71(e) - Maritime Administration - U.S. Department of ...

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