A SLOW AND FAST NEUTRON SCINTILLATION COUNT-RATE AND DOSE-RATE METER

Technical Report · Fri Aug 01 00:00:00 EDT 1958

OSTI ID:4327804

Spear, W G

A compact, scintillation, transistorized slow and fast neutron count- rate and dose-ratc portable instrument was developed. The basic instrument weighs approximately six pounds without moderator. A spherical 10inch diameter paraffin moderator weighing 15 pounds is used with the instrument for fast neutron dose-rate-de terminations. A spherical polyethylene, 10-inch diameter moderator may also be used. The polyethylene moderator weighs 10 pounds. The thermal and slow neutron sensitivity is approximately 100 c/m/n/cm/sup 2//sec or the first range fuel scale sensitivity is approximately 0.1 mrem/hr for thermal neutrons. Used with the 10inch moderator, the instrument has an approximate dose- rate sensitivity of 10,000 c/m millirad/hour. For fast neutrons the instrument is energy independent to approx equal 20 per cent from 0.3 Mev to 2.5 Mev. The three ranges employed area 0-1000, 0-10,000, amd 0-100,000 c/m with the first range corresponding to 0.1 mrem/hr for the thermal and slow neutrons and to 0.1 mred/hr for fast neutrons. The range sensitivities can be decreased by merely masking part of tbe crystal detecto light-output window or by using a smaller crystal. The battery life is 110 hours with continuous operation. The instrument is not affected by radium gamma fields of less than three r/hr. (auth)

• Research Organization: General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
• DOE Contract Number: W-31-109-ENG-52
• NSA Number: NSA-13-001291
• OSTI ID: 4327804
• Report Number(s): HW-56378
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-59
• Country of Publication: United States
• Language: English

Related Subjects

INSTRUMENTS
BACKGROUND
BATTERIES
CIRCUITS
CONFIGURATION
CRYSTALS
DOSEMETERS
EFFICIENCY
ENERGY
ENERGY RANGE
EPITHERMAL NEUTRONS
FAST NEUTRONS
GAMMA RADIATION
KEV RANGE
MEV RANGE
MODERATORS
NEUTRON DETECTION
OPERATION
PARAFFIN
PLANNING
POLYETHYLENES
RADIATION DOSES
RADIUM
RATE METERS
SCINTILLATION COUNTERS
SENSITIVITY
THERMAL NEUTRONS
TRANSISTORS
TRANSPORT
VARIATIONS
VOLUME
WEIGHT
WINDOWS