Operability of the Ventilation Continuous Air Monitor (CAM) Interlock Analysis of Proposed Upgrade to the 241AW Farm Primary Exhauster CAM System
- CHG
The Tank Farms Final Safety Analysis (FSAR) assumes that a ventilation stack Continuous Air Monitor (CAM) interlock system detects high radiation in the exhaust stream and shuts off the associated ventilation system within 10 minutes of a High-Efficiency Particulate Air (HEPA) filter system failure (CHG, 2002). Previous analysis of the as-built CAM system on the AW Farm Primary Exhauster (stack 296-A-27) showed that this system potentially required significantly longer than 10 minutes to detect a HEPA filter failure and initiate shutdown of the ventilation system (Short, 2002). The purpose of this report is to determine the CAM interlock system response time for a proposed upgrade of the 296-A-27 CAM system. The approach to be used in this analysis is essentially the same as used in RPP-10799, Rev. 0 (Short, 2002), which is to conservatively estimate the time required by the proposed upgraded CAM sampling/monitoring system to detect a FSAR-defined HEPA filter failure and automatically shutdown the exhaust fan. For the HEPA filter failure over-temperature accident scenario in the FSAR, the upgraded CAM system on the AW Farm Primary Exhauster will require significantly less than 10 minutes to detect a HEPA filter failure, actuate the CAM Interlock, and shutdown the exhauster fan. Therefore, the analyzed system is adequate to meet the operability requirements specified in the FSAR and the Tank Farms Technical Safety Requirements (CHG, 2001; CHG, 2002).
- Research Organization:
- CHG (US)
- Sponsoring Organization:
- USDOE Office of Environmental Management (EM) (US)
- DOE Contract Number:
- AC27-99RL14047
- OSTI ID:
- 808109
- Report Number(s):
- RPP-11394, Rev.0; EDT-631972
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACCIDENTS
AIR FILTERS
AIR POLLUTION MONITORS
AW FARM
CALCULATIONS
CAM
EXHAUST SYSTEMS
FAILURES
INTERLOCK
INTERLOCKS
PARTICULATES
PRIMARY STACK
SAFETY ANALYSIS
STORAGE FACILITIES
VENTILATION SYSTEMS