Disassembly Areas

The BIO examines the hazards assodated with K-Reactor in the Cold Standby condition described in the K-Reactor Cold Standby Plan (reference 2). Tlie BIO also examines the D-Reactor and P-Reactor Disassembly Basins to ensure that die storage and handling of irradiated components in those basins and hazardous mat als in their Disassembly Areas are bounded by the analyses performed for the K-Reactor Disassembly Basin. 

Major L-Area Layout in Relation to Disassembly Area.10.3-S... 

Radiological hazards of cons uence have been identified in the following K-Reactor areas Moderator Storage Areas, Assembly Area, Disassembly Area, and Purification Area. The hazards associated with the K-Reactor Moderator Storage Areas and Assembly Area have previously been evaluated in their BIOs f 2-2. 2-3). The following is a summary of the radiological hazards identified in the BIOs for the Moderator Storage Areas and Assembfy Area ... 

The maximum quantities of nitric add stored in the K-, L-, and P-Reactor Disassembly Areas are 164, 100, and 70 poundsi, respectively tef 2-9). The maximum quantity of solid sodium hydroxide in the P-Reactor Itisassembty Area is 22 pounds (Ref 2-9). ... 

Cold Shutdown. Because of the presence of foe in the Disassembly Area, it is not possible to... 

M i urkis ani components, whidi present radiolo cal hazards analyzed in this BIO, are stored iti the K-, L-, and P-Reactor IMsassembly Batins and the K-Reactor S rification Area. Therefore, a detail discussion of the Disassembly Areas is provided in Section 2.2.1. Additional processes reqtured to be operational are summarized in Sections 2.2.2 through 2.2.6. 

When the assemblies are discharged from the Reactor Tank, they are moved to the D E canal m the Process Room, placed in the D E conveyor, and transferred to the Disassembly Basin side of the D E canals The D E canal is a water ed canal located under die diieldtng wall that separates the Disassembly Area from the Process Room. In the IKsassembly Basin, the assemblies are transferred to hangers suspended from overhead monoids diat are used to store and transport the irradiated asseihblies throughout the Disassembfy Area 2>4, Section 9.1.2). The assemblies are initial stored in the VTS basin for a specified period of time to allow for decay of radioactive isotopes. This time varies with the types of material, since each material yvitt decay at a different rate. 

The service clarified water will continue to provide cooling to the Building 108 IK and 108-2K air compressors which are used by the breathing air and instniment air sterns. The service clarified water system also provides water to the Disassembly Area and Purification Area equipment. 

NIMS including remote alarms) provide criticality monitoring to warn personnd of a criticality in the Assembly Area and Disassembly Area. 

Disassembly Area crane equipment room (until all C D operations are complete)... 

Inspection of Assonbfy Area and Disassembly Area hoist equipment continues to be performed since fuel movement is required in K-Reactor. Other plant hoist equipment is maintained as needed. 

Life safety and fire safety walkdowns are performed in K-Reactor and L- and P-Reactor Disassembly Areas in accordance with Procedure DMP 4.05 of Reactor Division Manual RD 4.1 (Ref 6-33). This procedure serves to inspect these areas on a monthly baas in order to identify and correct life safety defidencies within the Reactor Division. Each finding is reported to the appropriate manager and tracked ft>r resolution of the concern. 

BuOdtng 105-K rooC indudamage from a frilling ventilation stack. The Disassenibty Area roof is too r away to be direct impacted by a Ming ventilation stadc). 

The loss of heating the K-, L-, or P-Reactor Disassembly Area could allow the air temperature to reach the freezing point of H2O (0°C). If the light water freezes, the K-, L-,. or P-Reactor... 

The K-Reactor Cold Standby Plan identifies an extensive DOE Order Compliance Program at SRS. A review of the Orders applicable to K-Reactor in Cold Standby identified that WSRC is not in compliance in 17 cases and has one additional Order in which the conq>Iiance status is under assessment or is otherwise pending. There were 13 CSAs and 4 exemption requests identified which are relevant, to the L- and P-Reactor Disassembly Basins. The relevant DOE Orders in which the Disassembly Areas are not in compliance are primarily of a generic or programmatic nature. In general, these noncompliances are not judged to increase the hazard level which currently exists. In addition, they do not ... 

Andes, T. C. "Disassembly Area Reference Manual, 105-K (U)," WSRC-TR-94-0137. 

Building lOS-K Micro M tfloop Controllers, UPS, Battery Charger, and Batteries will be taken ofT-line and the dectrical system locked out from MCC 12M in Disassembly Area... 

Major K-Area Layout in Rdation to Disassembly Area... 

Conduct a planning meeting with the Assembly/Disassembly director (/VD director), operator, assembly/ disassembly crew and the other workers who will be in the assembly/ disassembly area to review the location of the power line(s) and the steps that will be implemented to prevent encroachment/electrocution. 

For these steps, various technical prrocedures and concepts were developed, resulting in a reference concept in which the containment will essentially remain intact (in-situ concept). Over the top of the outer reactor vessel a disassembling area for remotely controlled tools will be erected that tightens on that vessel and can move down on the vessel according to the dismantling progress. 

Dismantling of the steam generator and disassembling in the disassembling area... 

Installation of a disassembling area without enlargement of the containment... 

Installation of the disassembling area with the facilities of the remote controlled dismantling, connecting the disassembling area to the outer reactor vessel, commissioning of auxiliary systems (e.g. vent systems)... 

Devices to dismantle the steam generator tubes and the fuel discharge tube Facility to transport the dismantled parts between manipulator and polar crane Auxiliary disassembling area... 

The lower level contains the service area with a lock area for removed materials, tooling machines, tools, supplementary means and persons during interventions and a measuring area for removed materials. Transportable shielding for interventions is stored at appropriate locations in the disassembling area. 

Due to the step by step moving of the disassembling area, the remote control personnel may always work more or less under the same space situation. This is an advantage for the personnel who shall execute their work with growing routine and work thus more time and cost effective. 

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