A review of monitoring, sampling and analysis of reactor coolant, reactor containment atmosphere and airborne reactor effluents in post accident concentrations
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
- Resource Relation:
- Conference: 19. DOE/NRC nuclear air cleaning conference, Seattle, WA, USA, 17 Aug 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
THREE MILE ISLAND-2 REACTOR
REACTOR ACCIDENTS
REACTOR MONITORING SYSTEMS
FISSION PRODUCT RELEASE
RADIOACTIVE EFFLUENTS
RARE GASES
SAMPLING
ACCIDENTS
ELEMENTS
ENRICHED URANIUM REACTORS
FLUIDS
GASES
MATERIALS
NONMETALS
POWER REACTORS
PWR TYPE REACTORS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REACTORS
THERMAL REACTORS
WASTES
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
220502 - Nuclear Reactor Technology- Environmental Aspects- Radioactive Effluents