Neutron measurement techniques for the nondestructive analysis of irradiated fuel assemblies
Nondestructive measurement of the passive neutron signatures of irradiated light-water reactor fuel assemblies is a rapid and simple technique for verifying operator-declared exposure values. Fuel assemblies from four different reactor facilities have been measured to establish the functional relationship between the operator-declared exposure values and the experimentally measured neutron emission rates. Experimentally measured neutron emission rates of small fuel rod sections have been shown to agree with the predicted results from our calculational model. Destructive results for the actinide isotopes also agreed very well with our prediction. Neutron emission rates varied by 30 to 40% between opposite corners of the source fuel assembly. Symmetrical neutron detector systems that measure all sides simultaneously were evaluated.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5490746
- Report Number(s):
- LA-9002-MS; ON: DE82007013; TRN: 82-007842
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NEUTRON DETECTION
MEASURING METHODS
NUCLEAR MATERIALS MANAGEMENT
ACCOUNTING
SPENT FUEL ELEMENTS
NONDESTRUCTIVE ANALYSIS
BURNUP
BWR TYPE REACTORS
FUEL ASSEMBLIES
PWR TYPE REACTORS
SAFEGUARDS
CHEMICAL ANALYSIS
DETECTION
FUEL ELEMENTS
MANAGEMENT
RADIATION DETECTION
REACTOR COMPONENTS
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
055001* - Nuclear Fuels- Safeguards
Inspection
& Accountability- Technical Aspects