In-plant test and evaluation of the neutron collar for verification of PWR fuel assemblies at Resende, Brazil
The neutron-coincidence collar has been evaluated for the measurement of pressurized-water reactor (PWR) fuel assemblies at the Fabrica de Elementos Combustiveis plant in Resende, Brazil. This evaluation was part of the cooperative-bilateral-safeguards technical-exchange program between the United States and Brazil. The neutron collar measures the STVU content per unit length of full fuel assemblies using neutron interrogation and coincidence counting. The STYU content is measured in the passive mode without the AmLi neutron-interrogation source. The extended evaluation took place over a period of 6 months with both scanning and single-zone measurements. The results of the tests gave a coincidence-response standard deviation of 0.7% (sigma = 1.49% for mass) for the active case and 2.5% for the passive case in 1000-s measurement times. The length measurement in the scanning mode was accurate to 0.77%. The accuracies of different calibration methods were evaluated and compared.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6265671
- Report Number(s):
- LA-10562-MS; ON: DE86005860
- Country of Publication:
- United States
- Language:
- English
Similar Records
Implementation of the active neutron Coincidence Collar for the verification of unirradiated PWR and BWR fuel assemblies
Field test and evaluation of the IAEA coincidence collar for the measurement of unirradiated BWR fuel assemblies
Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PWR TYPE REACTORS
SAFEGUARDS
COINCIDENCE METHODS
FUEL ASSEMBLIES
COUNTING TECHNIQUES
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
055001* - Nuclear Fuels- Safeguards
Inspection
& Accountability- Technical Aspects
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
400103 - Radiometric & Radiochemical Procedures- (-1987)