K-Reactor Purification Area

The operations of the K-Reactor Purification Area and the K-, L-, and P-Reactor Disassembly Basins have been examined in this BIO to ensure the adequacy of tiie safety envelope, and to develop and promulgate any new requirements ensuing from the Preliminary Hazards Analyses and the Hazards Assessment Documents. The existing K-, L-, and P-Reactor Technical Spedfications were also reviewed. The review revealed the need for new admimstrative controls to preserve the safi ty anatytis assumptions. 

The chemicals and Disassembly Basin water in Buildings 105-K, 105-L, and 105-P and moderator in the K-Reactor Purification Area, may be subject to freezing temperatures ifiieat is lost in... 

The analyses of K-Reactor in Cold Standby and L- and P-Reactor Disassanbty Ba ns, which were not previously anafyzed m the PHAs for the Assembfy Area and Moderator Storage Areas, are discussed in Section 8.3 above. These analyses primarily involve scenarios associated with the K-, L> and P-Reactor IMsassenibly Baans but include areas such as the K-Reactor Purification Area. The- impact of postulated aeddents associated with the K-Reactor Assembly Area and Moderator Storage Ar are provided in the BIOs (Ref 8-64, 8-65) for these areas. 

The structure of the K-Reactor Purification Area building is not susceptible to failure during design basis earthquakes, tornadoes, and high winds. The sdsmic event could potentially damage the purification equipment, such as the tanks and lines relea g moderator. In addition, drums of moderator stored outside the Purification Area are susceptible to fireezing during cold weather which also could release moderator. The consequences of a moderator release in the Purification Area are discussed in Section 8.3.2.19 of this BIO. 

Hazards assessments for K-Reactor in Cold Standby have been performed to determine the overall hazard categorization (Ref. 8-2, 8-3, 8-4). Radiological hazards of consequence have been identified in the following K-Reactor major areas IMsassembly Basin, Purification Area, Assembly Area, and Moderator Storage Areas. The overall categorization is based on the. consequences of a postulated radionuclide and/or chemical rdease firom K-Reactor, as wdl as the potent for a criticality event... 

P Reactor Disassqnbty Basins. This condition is based on the restrictions that no radioactive material are allowed except those irradiated reactor components in the K, L- and P-Reactor Disassembly Basins, unirradiated Mark 22 fuel assemblies in the K-Reactor Assembfy Area, and contaminated moderator in the KrReactor Moderator Storage Areas and Purification Area. This is based also on the nature of the fuel and sealed drums aiKi tanks and the precautionary measures taken to prevent the release of hazardous and radioactive material. The impa of normal operatiotu on the fkdlity worker, co-located worker, public, and the environnient is therefore-insigmficant. RC HP personnel will be involved with the movement of irradiated reactor components, contaminated unirradiated fiiel assemblies, and contaminated moderator and will establish ALARA requirmoits for the focility workers as discussed in Section 6.0. 

To continue to store and handle the irradiated components, the Disassembly Ba will continue to be operated in the same mannv as in tiie past. Also, to continue to handle and process contaminated moderator, the Purification Area vdll continue to be operated in the same manner as in the past. The operations of K-Reactor in Cold Standby and its structures, systems, and components are fiuth discussed in Section 2.0 of this BIO. 

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 moderator processmg fiidiities in the Purification Area of K Reactor process the degraded and lugih activity moderator. When the mission for these focilities is complete, th will be placed in standby and drained. 

The steam astern is required for the moderator recovery and rework in the Purification Area (apprommatefy three years) ahd freeze protection due to moderator bang stored in K>Reactor Moderator Storage Areas e 2-2). 

Tritiated moderator in the K-Reactor Moderator St< age Areas and Purification Area... 

The fissile materials which may be in the Purification Area of K-Reactor are the contaminants removed fiom the moderator in the HAM and dedeuterization processes. The contaminated moderator contains trace amounts of plutonium however, the trace amount of plutonium is well below the theoretical minimum critical mass (Ref 6-6). 

The (DBE) for K-, L-, and P-Reactors has a maximum horizontal groimd acceleration of 0.2g (Ref 8-28). This can cause damage to nonsdsmicaliy qualified equipment and structures within and outside of Buildings 105-K, 105-L, and 105-P inching the Disassembty Basins. In addition, the Purification Area contains non seismica% qualified equipment that may M during a seismic event. 

Using the Reforence 8 58 results for the K Reactor Moderator Storage Area% the consequences for the rdease of contaminated moderator from the Purification Area during a DBE can be derived as follows ... 

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