EQUIPMENT FOR DETECTION OF RADIATION IN A FIELD

Patent · Mon Apr 10 04:00:00 EST 1961

OSTI ID:4766013

The intensity of Cherenkov radiation arising in a transparent reactor coolant is measured in order to determine or to control the energy developed in the reactor. For performing this measurement a closed duct for the reactor coolant is provided in which flows the coolant coming from the reactor. The radioactivity of the coolant induced by the neutron flux in the core comes from the activity of nitrogenl6 which is a beta emitter with a decay period of 7.4 sec. The Cherenkov radiation arising in the coolant is measured by photoelectric cells near the two ends of the duct, so that one photoelectric cell measures the intensity in the coolant entering the conduit, the intensity of which comes from the activity of fission products in the coolant itself, while the other one measures the intensity in the coolant leaving the duet, which intensity only comes from fission products because the activity of the coolant already has disappeared to a great extent. The difference of the measuring signals is proportional to the energy developed in the reactor. (NPO)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-033270
• OSTI ID: 4766013
• Report Number(s): FR 1261628
• Country of Publication: France
• Language: English

Related Subjects

ACTIVATION
BETA PARTICLES
CHERENKOV RADIATION
CONTROL SYSTEMS
COOLANT LOOPS
COOLANTS
DECAY
ENERGY
ENGINEERING AND EQUIPMENT
FISSION PRODUCTS
MEASURED VALUES
NEUTRON FLUX
PHOTOELECTRIC CELLS
RADIATION DOSES