A review of monitoring, sampling and analysis of reactor coolant, reactor containment atmosphere and airborne reactor effluents in post accident concentrations
Conference
·
OSTI ID:6660591
A post-implementation review has been made in NRC Region I of the post-accident sampling systems (PASS), the gaseous effluent monitors, and the provisions for sampling effluent particulates and radioiodines which were required by the NRC subsequent to the TMI-2 accident (NUREG-0737). Prefabricated PASS systems were predominant. Problems included insufficient purge times, inadequate separation of dissolved gases, excessive dilution and the accuracy of analytical techniques in the presence of interferences. Microprocessor-controlled high-range gas monitors with integral provisions for sampling particulates and radioiodines in high concentrations were widely used. Calibration information was generally insufficient for the unambiguous conversion of monitor readings to release rates for a varying postaccident mixture of radiogases. The referenced sampling guidance (ANSI-N 13.1-1969) was inappropriate for the long sampling lines customarily used. Generic research is needed to establish the behavior of particulates and radioiodines in these lines.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA); Nuclear Regulatory Commission, King of Prussia, PA (USA). Region I; Knox Consultants, Inc., Dunwoody, GA (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6660591
- Report Number(s):
- BNL-NUREG-38549; CONF-860820-13; CONF-8609147-12; ON: TI87006914
- Country of Publication:
- United States
- Language:
- English
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