The iodine spike release rate during a steam generator tube rupture
- Idaho National Engineering Lab., EG and G Idaho, Inc., Idaho Falls, IL (US)
The U.S. Nuclear Regulatory Commission (NRC) requires utilities to determine the response of a pressurized water reactor (PWR) to a steam generator tube rupture (SGTR) as part of the safety analysis for the plant. The SGTR analysis includes assumptions regarding the presence of fission product iodine in the reactor coolant resulting from iodine spikes. To get a better understanding of iodine spiking, reactor trip and associated radiochemistry data were collected from 26 PWRs. These data were compared against validation criteria to determine their applicability to an investigation of the magnitude of an iodine spike following a reactor trip. This paper presents the applicable data and the results of a statistical analysis. Conclusions are made from this analysis of iodine spiking following reactor trips concerning the magnitude of a spike during an SGTR and compared with the NRC analysis criteria. The conclusion is then made that the iodine release rate expected during an SGTR, on the basis of the analysis of the data base, is much less (by a factor of 15 or more) than that specified by the NRC for analysis of this accident type.
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 5078438
- Journal Information:
- Nuclear Technology; (United States), Journal Name: Nuclear Technology; (United States) Vol. 94:3; ISSN NUTYB; ISSN 0029-5450
- Country of Publication:
- United States
- Language:
- English
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Probability of the iodine spike release rate during an SGTR (steam generator tube rupture)
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ACCIDENTS
BOILERS
COOLING SYSTEMS
ELEMENTS
ENERGY SYSTEMS
ENRICHED URANIUM REACTORS
FAILURES
FISSION
HALOGENS
IODINE
NATIONAL ORGANIZATIONS
NONMETALS
NUCLEAR REACTIONS
POWER REACTORS
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR SAFETY
REACTORS
RUPTURES
SAFETY
STEAM GENERATORS
THERMAL REACTORS
TUBES
US NRC
US ORGANIZATIONS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS