Computer analyses support of an active neutron moisture probe for the Hanford Site tanks
Some of the older Hanford Site waste tanks contain significant quantities of Ferrocyanides. Ferrocyanides, under certain conditions, can sustain a self-propagating chemical reaction. The parameters of concern are moisture and temperature. If adequate moisture concentrations exist, such a reaction will be precluded. One of the most promising methods for determining moisture levels in the tanks involves deploymentof an active neutron probe in dry wells present in the tanks. Neutrons emitted by a source entering the tank material are moderated and scattered back to a detector. The probe response to various parameters such as moisture concentration, tank materials, and source-to-detector spacing was calculated using the Monte Carlo Neutron Photon (MCNP) computer code (LANL 1986). The usefulness of an existing active neutron probe in its current configuration appears limited for moisture measurement. The MCNP model suggests that the application of a source extender, a modification that was engineered into the probe design, may largelyenhance the probe's moisture measurement capabilities.
- Research Organization:
- Westinghouse Hanford Co., Richland, WA (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-87RL10930
- OSTI ID:
- 6692882
- Report Number(s):
- WHC-SA-1721; CONF-930372--6; ON: DE93009418
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
663610 -- Neutron Physics-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BORON COMPOUNDS
BORON FLUORIDES
CALCULATION METHODS
COMPLEXES
COMPUTERIZED SIMULATION
CONTAINERS
DETECTION
FERROCYANIDES
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HANFORD RESERVATION
IRON COMPLEXES
MANAGEMENT
MEASURING INSTRUMENTS
MODIFICATIONS
MOISTURE
MOISTURE GAGES
MONTE CARLO METHOD
NATIONAL ORGANIZATIONS
NEUTRON DETECTION
NEUTRON PROBES
PROBES
RADIATION DETECTION
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE STORAGE
SIMULATION
STORAGE
TANKS
TRANSITION ELEMENT COMPLEXES
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WASTE STORAGE