ALARA ASSESSMENT OF SETTLER SLUDGE SAMPLING METHODS

NELSEN LA

关键词: AR FACILITIES;    ALARA;    SAMPLING;    SLUDGES;    RADIATION PROTECTION;    PERSONNEL;    RADIOACTIVE WASTES;    UNDERWATER OPERATIONS;    SAMPLERS;    DESIGN;   

DOI  :  10.2172/950466
RP-ID  :  KBC-40179 Rev 0
PID  :  OSTI ID: 950466
Others  :  TRN: US0902036

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

The purpose of this assessment is to compare underwater and above water settler sludge sampling methods to determine if the added cost for underwater sampling for the sole purpose of worker dose reductions is justified. Initial planning for sludge sampling included container, settler and knock-out-pot (KOP) sampling. Due to the significantly higher dose consequence of KOP sludge, a decision was made to sample KOP underwater to achieve worker dose reductions. Additionally, initial plans were to utilize the underwater sampling apparatus for settler sludge. Since there are no longer plans to sample KOP sludge, the decision for underwater sampling for settler sludge needs to be revisited. The present sampling plan calls for spending an estimated $2,500,000 to design and construct a new underwater sampling system (per A21 C-PL-001 RevOE). This evaluation will compare and contrast the present method of above water sampling to the underwater method that is planned by the Sludge Treatment Project (STP) and determine if settler samples can be taken using the existing sampling cart (with potentially minor modifications) while maintaining doses to workers As Low As Reasonably Achievable (ALARA) and eliminate the need for costly redesigns, testing and personnel retraining.