Disassembly Basin Filtration System

The filtered water makeup systems The Disassembly Basin filtration system The MB cutting saw stops The hand-hdd gamma monitors The MB oiticality bars used in the fuel bundling process The HBBS rack spacers and fuel blocking system The shipping cask blanks and cadmium separator plates The installed gamma monitors on the machine basin equipment... 

The Disassembly Badn filtration system maintains the Disassembly Basin water visual clarity vdthin specifications for routine underwater woric performed by component handling personnel. The tystem removes particulate and suspended solids in the basin water through use of sand tilters. 

A settler tank is used as part of the basin filtration system for each of the K-, L-, and P-Reactor Disassembly Basins. Its fimefion is to serve as a collector of water and material that is forced out of the sand filters and into the sand filter sumps via a backwash process used to purge the sand filters when the pressure drop across them becomes excessive. The residue fiom the sand filters is then allowed to settle to the bottom of the settler tank, and the surfece water then returned to the Disassembly Basin (Ref 8-28, Section 9.1.3.2). 

Disassembly Basin Filtration Lube Oil Handling Caterpillar Diesels Compressed Air (Rev. 1) Bini am Pump Seal System Bingham Pump Motor Bin am Pump Lube Oil... 

The K-, L-, and P-Reactor IMsassembly Batin filtration systems maintain the IMsassembbr Batins water visual clarity within spedfications by r oving particulate and suspended solids in foe basin water via sand filters fed 1 two sand fitter feed lines. One of the two sand filters the K- and P-Reactor Disassembly Basins is no long in service, so a total of one 1000 gpm foed line is actually used to supper foe remainii sand filter. L-Reactor Disassembly Basin has two satui filters, ff foe 1000 sent to foe sand filter is not replenished (due to leak or rmsdirection), a 1000 gpm dnundown will ensue (2000 gpm leak for L-Reactor). This event bounds the natural phenomena damage (missile, tornado, straight-wind) to foe sand filters. 

The deionizer systems remove charged radioactive particles in the Kr, L>, and P>Reactor Disassembly Basin water via ion exchange vdth resin in the deionizers. The deionizers are supplied Disassembly Baan water either indirectly fiom the filtration sterns or directly from the Disassembly Ba coding system. In either case> the maximum flow that may be diverted from each of the Disassemdy Basins is 70 gpm (Ref 8-37). 

The aluminum cladding of the fiiel assemblies are credited to some degree in the analyses of all postulated accidents for providing confinement of radionuclides and fissile material contained in the fuel assemblies in a manner which minimizes their release to the K-, L-, and P-Reactor Disassembly Basins. Should the aluminum cladding be breached fissile material may precipitate onto the basin fioors or be carried into the filtration systems potentially forming a critical masses. Also, the basin water radioactivity level may rise to unacceptable levels and pose increased consequence to the workers, public, and environment should the water leak to the environment or an uncontrolled area. 

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