Release and transport of fission product cesium in the TMI-2 accident
Approximately 50% of the fission product cesium was released from the overheated UO/sub 2/ fuel in the TMI-2 accident. Steam that boiled away from a water pool in the bottom of the reactor vessel transported the released fission products throughout the reactor coolant system (RCS). Some fission products passed directly through a leaking valve with steam and water into the containment structure, but most deposited on dry surfaces inside of the RCS before being dissolved or resuspended when the RCS was refilled with water. A cesium transport model was developed that extended measured cesium in the RCS back to the first day of the accident. The model revealed that approx.62% of the released /sup 137/Cs deposited on dry surfaces inside of the RCS before being slowly leached and transported out of the RCS in leaked or letdown water. The leach rates from the model agreed reasonably well with those measured in the laboratory. The chemical behavior of cesium in the TMI-2 accident agreed with that observed in fission product release tests at Oak Ridge National Laboratory (ORNL).
- Research Organization:
- Oak Ridge National Lab., TN (USA). Chemical Technology Div.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5041976
- Report Number(s):
- CONF-860911-19; ON: DE87000662
- Resource Relation:
- Conference: 192. American Chemical Society national meeting, Anaheim, CA, USA, 7 Sep 1986
- Country of Publication:
- United States
- Language:
- English
Similar Records
Noble gas, iodine, and cesium transport in a postulated loss of decay heat removal accident at Browns Ferry
MELCOR 1.8.5 modeling aspects of fission product release, transport and deposition an assessment with recommendations.
Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
THREE MILE ISLAND-2 REACTOR
FISSION PRODUCT RELEASE
REACTOR ACCIDENTS
CESIUM 137
FISSION PRODUCTS
TRANSPORT
ACCIDENTS
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM ISOTOPES
ENRICHED URANIUM REACTORS
ISOTOPES
MATERIALS
NUCLEI
ODD-EVEN NUCLEI
POWER REACTORS
PWR TYPE REACTORS
RADIOACTIVE MATERIALS
RADIOISOTOPES
REACTORS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
YEARS LIVING RADIOISOTOPES
220900* - Nuclear Reactor Technology- Reactor Safety
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled