Development of neutron measurement in high gamma field using new nuclear emulsion
- Nagoya Univ., Nagoya, Aichi (Japan)
- Japan Atomic Energy Agency, Narita-cho, Oarai-machi, Ibaragi (Japan)
To precisely measure the neutron emissions from a spent fuel assembly of a fast breeder reactor, we formed nuclear emulsions based on a non-sensitized Oscillation Project with Emulsion tracking Apparatus (OPERA) film with AgBr grain sizes of 60, 90, and 160 nm. The efficiency for {sup 252}Cf neutron detection of the new emulsion was calculated to be 0.7 x 10{sup -4}, which corresponded to an energy range from 0.3 to 2 MeV and was consistent with a preliminary estimate based on experimental results. The sensitivity of the new emulsion was also experimentally estimated by irradiating with 565 keV and 14 MeV neutrons. The emulsion with an AgBr grain size of 60 nm had the lowest sensitivity among the above three emulsions but was still sensitive enough to detect protons. Furthermore, the experimental data suggested that there was a threshold linear energy transfer of 15 keV/{mu}m for the new emulsion, below which no silver clusters developed. Further development of nuclear emulsion with an AgBr grain size of a few tens of nanometers will be the next stage of the present study. (authors)
- Research Organization:
- American Society for Testing and Materials - ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA, 19428-2959 (United States); European Working Group on Reactor Dosimetry - EWGRD, SCK.CEN, Mol (Belgium)
- OSTI ID:
- 22086990
- Report Number(s):
- INIS-US-13-ISRD-14-P2-14; TRN: US13V0064045437
- Resource Relation:
- Conference: ISRD-14: 14. International Symposium on Reactor Dosimetry, Bretton Woods, NH (United States), 22-27 May 2011; Other Information: Country of input: France; 6 refs.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CALIFORNIUM 252
DOSIMETRY
EFFICIENCY
FBR TYPE REACTORS
GRAIN SIZE
KEV RANGE 100-1000
KEV RANGE 10-100
LET
MEV RANGE 01-10
NEUTRON DETECTION
NEUTRON DETECTORS
NEUTRON EMISSION
NEUTRONS
NUCLEAR EMULSIONS
PHOTOGRAPHIC EMULSIONS
PROTONS
SENSITIVITY
SILVER BROMIDES
SPENT FUELS