TWO IONISATION CHAMBERS FOR ACTIVITY MEASUREMENTS ON WIRES USED FOR NEUTRON- FLUX SCANNING

Technical Report · Mon Sep 01 04:00:00 EDT 1958

OSTI ID:4307175

Abson, W; Awcock, M

The wire activation technique can be used to measure the neutron flux distribution in reactor cores over a wide range of flux levels by a suitable choice of wire materials and irradiation times. Two types of ionization chamber used for the measuremeni of activity per unit length of wire are described. The first is a gammasensitive chamber, active length approximately 10 cm, designed for use with activated tungsten wire in the measuremeat of neutron flux distribution in large graphite-moderated reactors. The method is suitable for measurements over a range of about 10/sup 9/ to 2 x 10/sup 13/ n/cm/sup 2/sec. The second is a beta-sensitive chamber, active length 1.5 cm, designed for use with Ni and MnNi wires for neutron flux distribution measurements in small reactor cores. The method is suitable for measurements over a range from 1O/sup 8/ to 10/sup 14/ n/cm/sup 2/sec.

• Research Organization: United Kingdom Atomic Energy Authority. Research Group. Atomic Energy Research Establishment, Harwell, Berks, England
• NSA Number: NSA-13-003724
• OSTI ID: 4307175
• Report Number(s): AERE-EL/M-100
• Country of Publication: United Kingdom
• Language: English

Related Subjects

ACTIVATION
BETA DETECTION
DISTRIBUTION
EFFICIENCY
GAMMA DETECTION
GRAPHITE MODERATOR
INSTRUMENTS
IONIZATION CHAMBERS
IRRADIATION
MANGANESE ALLOYS
MEASURED VALUES
NEUTRON DETECTION
NEUTRON FLUX
NICKEL
NICKEL ALLOYS
OPERATION
PLANNING
RADIOACTIVITY
REACTOR CORE
REACTORS
SENSITIVITY
TUNGSTEN
USES
VOLUME
WIRES