Benchmark Experiments of Thermal Neutron and Capture Gamma-Ray Distributions in Concrete Using {sup 252}Cf

Journal Article · Sat Oct 15 04:00:00 EDT 2005 · Nuclear Science and Engineering

OSTI ID:20808477

Asano, Yoshihiro ^[1]; Sugita, Takeshi ^[2]; Hirose, Hideyuki ^[1]; Suzaki, Takenori ^[1]

---

1. Japan Atomic Energy Research Institute (Japan)
2. Science and System Laboratory, Ltd. (Japan)

The distributions of thermal neutrons and capture gamma rays in ordinary concrete were investigated by using {sup 252}Cf. Two subjects are considered. One is the benchmark experiments for the thermal neutron and the capture gamma-ray distributions in ordinary concrete. The thermal neutron and the capture gamma-ray distributions were measured by using gold-foil activation detectors and thermoluminescence detectors. These were compared with the simulations by using the discrete ordinates code ANISN with two different group structure types of cross-section library of a new Japanese version, JENDL-3.3, showing reasonable agreement with both fine and rough structure groups of thermal neutron energy. The other is a comparison of the simulations with two different cross-section libraries, JENDL-3.3 and ENDF/B-VI, for the deep penetration of neutrons in the concrete, showing close agreement in 0- to 100-cm-thick concrete. However, the differences in flux grow with an increase in concrete thickness, reaching up to approximately eight times near 4-m thickness.

• OSTI ID: 20808477
• Journal Information: Nuclear Science and Engineering, Journal Name: Nuclear Science and Engineering Journal Issue: 2 Vol. 151; ISSN NSENAO; ISSN 0029-5639
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTIVATION DETECTORS
BENCHMARKS
CALIFORNIUM 252
CAPTURE
CONCRETES
DISCRETE ORDINATE METHOD
DISTRIBUTION
FOILS
GAMMA RADIATION
GOLD
NUCLEAR DATA COLLECTIONS
SIMULATION
THERMAL NEUTRONS
THERMOLUMINESCENCE
THICKNESS