Method and apparatus for continuous monitoring and control of neutron absorption properties of chemical shim
Abstract
Abstract AN APPARATUS, AND METHOD OF OPERATION THEREOF, TO CONTINUOUSLY MONITOR AND CONTROL THE NEUTRON ABSORPTION PROPERTIES OF CHEMICAL SHIM USED IN REGULATING REACTIVITY OF A PRESSURIZED WATER NUCLEAR REACTOR. COOLANTMODERATOR FLUID, INCLUDING THE SOLUBLE NEUTRON ABSORPTION PROPERTY IN THE CHEMICAL SHIM, IS CONTINUOUSLY PASSED THROUGH A CHAMBER HAVING PLURAL NEUTRON DETECTORS SURROUNDING A NEUTRON SOURCE OF KNOWN STRENGTH. UTILIZING THE NEUTRON ABSORPTIOMETRY PRINCIPLE, A SIGNAL REPRESENTATIVE OF THE CONCENTRATION OF THE ABSORPTION PROPERTIES OF THE CHEMICAL SHIM IN THE COOLANT-MODERATOR IS DERIVED. THIS SIGNAL IS THEN APPLIED THROUGH SIGNAL CONDITIONING MEANS TO A READOUT AND ALARM DEVICE SO THAT CONSTANT MONITORING OF THE SHIM CONCENTRATION ABSORTPION PROPERTIES MAY BE ACCOMPLISHED; ADDITIONALLY, THE SIGNAL MAY BE APPLIED TO MAINTAIN THE CONCENTRATION OF NEUTRON ABSORPTION PROPERTIES OF THE CHEMICAL SHIM IN THE COOLANTMODERATOR AT A DESIRED LEVEL.
Inventors
- 👤 Loering M Hohnson
- 👤 Arthur M Yuile
Bibliographic Details
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| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
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