Neutronic analysis of the Three Mile Island Unit 2 ex-core detector response
A neutronic analysis has been made with respect to the ex-core neutron detector response during the TMI-2 incident. A series of transport theory calculations quantified the impact upon the detector count rate of various core and downcomer conditions. In particular, various combinations of coolant void content and spatial distributions were investigated to yield the resulting transmission of the photoneutron source to the detector. The impact of a hypothetical distributed source within the downcomer region was also examined in order to simulate the potential effect of the release of neutron producing fission products into the coolant. These results are then offered as potential explanations for the anomalous behavior of the detector during the period of approx. 20 minutes through approx. 3 hours following the reactor scram.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6035120
- Report Number(s):
- ANL-81-75; ON: DE82004040
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
ACCIDENTS
ACCURACY
ENRICHED URANIUM REACTORS
MEASURING INSTRUMENTS
PERFORMANCE
POWER REACTORS
PWR TYPE REACTORS
RADIATION DETECTORS
REACTOR ACCIDENTS
REACTOR INSTRUMENTATION
REACTORS
THERMAL REACTORS
THREE MILE ISLAND-2 REACTOR
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
ACCIDENTS
ACCURACY
ENRICHED URANIUM REACTORS
MEASURING INSTRUMENTS
PERFORMANCE
POWER REACTORS
PWR TYPE REACTORS
RADIATION DETECTORS
REACTOR ACCIDENTS
REACTOR INSTRUMENTATION
REACTORS
THERMAL REACTORS
THREE MILE ISLAND-2 REACTOR
WATER COOLED REACTORS
WATER MODERATED REACTORS