Secondary- Radiological Assessment Branch (RAB)

At the construction permit (CP) stage of review, ETSB reviews the information in the applicant's safety analysis report (SAR) in the specific areas that follow. At the operating license (OL) stage of review, ETSB review consists of confirming the design accepted at the CP stage and evaluating the adequacy of the applicant's technical specifications in these areas. The ETSB review includes: 1. The gaseous waste management (treatment and ventilation) systems design, design objectives, design criteria, methods of treatment, expected releases, and principal parameters used in calculating the releases of radioactive ' materials (noble gases, radioiodine, and particulates) in gaseous effluents. The ETSB review will include the system piping and instrumentation diagrams (P&IDs), and the process flow diagrams showing methods of operation and factors that influence waste treatment, e.g., system interfaces and potential bypass routes. 2. Equipment and ventilation system design capacities, expected flows and radionuclide concentrations, expected decontamination factors for radio-nuclides, and available holdup time. The system design capacity relative to the design and expected input flows, the period of time the system is required to be in service to process normal waste flows, availability of standby equipment, alternate processing routes, and interconnections between subsystems. This information is used to evaluate the overall system capabi-lity to meet anticipated demands imposed by major processing equipment downtime and waste volume surges due to anticipated operational occurrences. 3. The quality group classifications of piping and equipment, and the bases governing the design criteria chosen. Design and expected temperatures and pressures, and materials of construction of the components of the system. Rev. 2- July198