Base neutron noise in PWRs
Conference
·
OSTI ID:5762435
Considerable activity has been devoted in recent years to the use of neutron noise for investigation of problems in pressurized-water reactors (PWRs). The investigators have found that neutron noise provides an effective way to monitor reactor internal vibrations such as vertical and lateral core motion; core support barrel and thermal shield shell modes, bending modes of fuel assemblies, and control rod vibrations. However, noise analysts have also concluded that diagnosis of a problem is easier if baseline data for normal plant operation is available. Therefore, the authors have obtained ex-core neutron noise signatures from eight PWRs to determine the similarity of signatures between plants and to build a base of data to determine the sources of neutron noise and thus the potential diagnostic information contained in the data. It is concluded that: (1) ex-core neutron noise contains information about the vibration of components in the pressure vessel; (2) baseline signature acquisition can aid understanding of plant specific vibration frequencies and provide a bases for diagnosis of future problems if they occur; and (3) abnormal core support barrel vibration can most likely be detected over and above the plant-to-plant signature variation observed thus far.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5762435
- Report Number(s):
- CONF-811042-9; ON: TI85004511
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
BORSSELE REACTOR
CALVERT CLIFFS-1 REACTOR
CALVERT CLIFFS-2 REACTOR
CONTROL ELEMENTS
COOLING SYSTEMS
DATA
ENERGY SYSTEMS
ENRICHED URANIUM REACTORS
EXPERIMENTAL DATA
FUEL ASSEMBLIES
INFORMATION
KINETICS
MECHANICAL VIBRATIONS
NUMERICAL DATA
POWER REACTORS
PRIMARY COOLANT CIRCUITS
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR CORE RESTRAINTS
REACTOR CORES
REACTOR KINETICS
REACTOR MONITORING SYSTEMS
REACTOR NOISE
REACTOR PROTECTION SYSTEMS
REACTORS
RESTRAINTS
ROBINSON-2 REACTOR
SEQUOYAH-1 REACTOR
THERMAL REACTORS
TROJAN REACTOR
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
BORSSELE REACTOR
CALVERT CLIFFS-1 REACTOR
CALVERT CLIFFS-2 REACTOR
CONTROL ELEMENTS
COOLING SYSTEMS
DATA
ENERGY SYSTEMS
ENRICHED URANIUM REACTORS
EXPERIMENTAL DATA
FUEL ASSEMBLIES
INFORMATION
KINETICS
MECHANICAL VIBRATIONS
NUMERICAL DATA
POWER REACTORS
PRIMARY COOLANT CIRCUITS
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR CORE RESTRAINTS
REACTOR CORES
REACTOR KINETICS
REACTOR MONITORING SYSTEMS
REACTOR NOISE
REACTOR PROTECTION SYSTEMS
REACTORS
RESTRAINTS
ROBINSON-2 REACTOR
SEQUOYAH-1 REACTOR
THERMAL REACTORS
TROJAN REACTOR
WATER COOLED REACTORS
WATER MODERATED REACTORS