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2G075 | Monitoring and testing of nuclear reactors | |
G21C17/00 -17/14 |
G21C17/00-17/14 | AA | AA00 TYPES OF NUCLEAR REACTOR FACILITIES |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | AA08 | AA09 | AA10 |
. Nuclear reactors or nuclear power plants | . . Light water reactors | . . . Boiling-water reactors | . . . . Reactors with internal pumps (e.g., advanced boiling-water reactors) | . . . Pressurized-water reactors | . . Pressurized-tube reactors or heavy water reactors | . . Fast-breeder reactors | . . . Loop-type fast-breeder reactors | . . . Tank-type fast-breeder reactors | . . Gas-cooled reactors (e.g., high-temperature gas reactors) | |||
AA11 | AA12 | AA13 | AA14 | AA15 | AA17 | AA18 | AA19 | AA20 | ||||
. . . Pebble-bed reactors | . . Molten-salt reactors | . . Experimental and test reactors | . . Spectrum-shift reactors | . . Natural-circulation reactors | . Fuel-manufacturing facilities | . Radioactive waste treatment facilities and retreatment facilities | . Variants installed in special locations (e.g., underground, undersea, in outer space) | . Others | ||||
BA | BA00 MONITORING AND TESTING PERIODS (I.E.,INCLUDING MAINTENANCE AND INSPECTION) |
BA01 | BA03 | BA04 | BA05 | BA06 | BA07 | BA08 | BA09 | |||
. Monitoring and testing until completion of the nuclear plant | . Monitoring and testing during operation | . . Starting or when restarting | . . Output control | . . . Variants that use substances that absorb a large quantity of neutrons | . . . . Variants using control rods | . . . Variants that control the recirculation flow rate | . . . Load tracking operations | |||||
BA11 | BA12 | BA13 | BA14 | BA15 | BA16 | BA17 | BA18 | BA19 | BA20 | |||
. . Break-in in which pellet clad interaction (PCI) is considered | . . Breakdowns | . . . Breaddowns with loss of coolant (i.e., LOCA) | . . . Breakdowns with scram | . . Operations to stop reactors | . Monitoring and testing during down-time | . . Periodic inspections | . . Replacement or repair | . Monitoring and testing following reactor disposal | . Others | |||
CA | CA00 OBJECTS MONITORED OR TESTED |
CA01 | CA02 | CA03 | CA04 | CA05 | CA06 | CA07 | CA08 | CA09 | CA10 | |
. Multiple plants | . Entire plants (i.e., including multiple systems) | . Individual equipment and systems | . . Pressure vessels and reactor vessels | . . . Sections coupled with pipes or tubular members | . . . External surfaces | . . . Internal surfaces or internal structures | . . Reactor cores | . . Pressure tubes and calandria tubes | . . Containment vessels and buildings | |||
CA11 | CA12 | CA13 | CA14 | CA15 | CA16 | CA17 | CA18 | CA19 | CA20 | |||
. . . Unspecified types of internal equipment (CA10 is assigned to walls) | . . . Storage facilities (e.g., fuel pools) | . . Pipes | . . Pumps (i.e., including jet pumps) | . . Valves (e.g., main steam isolation valves) | . . Heat exchangers and intermediate heat exchangers | . . . Steam generators | . . Turbines and generators | . . Condensers | . . Main steam systems | |||
CA21 | CA22 | CA23 | CA24 | CA25 | CA26 | CA27 | CA28 | CA29 | CA30 | |||
. . Turbine condenser systems and feedwater systems | . . Secondary cooling systems | . . Safety and protection systems | . . Control systems | . . . Control-rod-drive systems and control-rod-drive mechanisms | . . Pressure-suppression systems and vessels | . . Emergency cooling systems | . . Systems that cool during stoppages and residual heat removal systems | . . Auxiliary systems | . . . Coolant-purification systems (e.g., CUW) | |||
CA31 | CA32 | CA33 | CA34 | CA35 | CA36 | CA38 | CA39 | CA40 | ||||
. . . Radioactive-waste-treatment systems | . . . . Off-gas systems and exhaust-gas stacks | . . . Drain systems | . . . Cover gas systems | . . . Ventilation and air conditioning systems | . . . Auxiliary-equipment-cooling systems and seawater systems | . Fuels, fuel elements, and fuel assemblies | . Control rods, spectrum shift rods, and the like | . Coolants and moderators | ||||
CA41 | CA42 | CA43 | CA44 | CA45 | CA46 | CA47 | CA48 | CA49 | CA50 | |||
. . Variants in reactor containers or near intakes or outlets | . Atmosphere (e.g., gas in containment vessels) | . Parts | . . Nuts and bolts | . Test pieces | . Broken pieces and loose parts | . Operating staff | . People or goods that enter or exit the facility | . Instrumentation systems, or monitoring or testing apparatuses | . Other | |||
DA | DA00 CONTENTS OF OR ITEMS IN MONITORING AND TESTING |
DA01 | DA02 | DA03 | DA04 | DA05 | DA06 | DA07 | DA08 | DA09 | DA10 | |
. Nuclear instrumentation | . Physical quantities for the purpose of monitoring | . . Temperature and heat | . . Pressure | . . Flow rate | . . Liquid level | . . Component concentration | . . Radioactivity and radiation | . Phenomena for the purpose of monitoring | . . Leakage | |||
DA11 | DA12 | DA13 | DA14 | DA15 | DA16 | DA17 | DA18 | DA19 | DA20 | |||
. . Boiling | . . Cavitation | . . Mechanical vibration | . . Corrosion | . Structural safety (e.g., shape) | . . Breakage or fractures | . Manner in which fuel and the like are arranged or assembled | . Soundness of functions and characteristics (e.g., safety) | . . Start-up testing and operating states of valves, pumps, and the like | . Others | |||
EA | EA00 DETERMINATIONS OR DIAGNOSES FROM THE RESULTS OF MONITORING AND TESTING |
EA01 | EA02 | EA03 | EA04 | EA05 | EA06 | EA07 | EA08 | EA09 | EA10 | |
. Presence of abnormal states | . Indications of abnormal states | . Quantitative diagnosis of abnormal states (e.g., probability or degree) | . Unanticipated abnormal states | . Specification of the location of abnormalities and searching for the causes of abnormalities | . . Variants that identity the first cause | . Prediction of the propagation of abnormal states | . Measures to avoid or recover from abnormal states | . Indication of maintenance and inspection | . Others | |||
FA | FA00 MONITORING AND TESTING MEANS |
FA01 | FA02 | FA03 | FA04 | FA05 | FA06 | FA07 | FA08 | FA09 | FA10 | |
. Physical quantities that change the testing conditions for items to be tested | . . Force or vibration | . . Pressure (i.e., including reduced pressure) | . . Heat (i.e., including cooling) | . . Radiation | . . . Neutron beams | . . Test signals and external disturbances | . Variants using simulated objects | . . Variants using heaters | . . Variants using test pieces | |||
FA11 | FA12 | FA13 | FA14 | FA15 | FA16 | FA17 | FA18 | FA19 | FA20 | |||
. Detection means | . . Variants using observation apparatuses | . . . Visual observation or television cameras | . . . Periscopes or fiberscopes | . . . Ultrasonic radioscopy | . . Use of flaw detection devices (e.g., ultrasonic waves, eddy currents, or penetration) | . . Use of vibration or wave motion (e.g., acceleration, acoustics, or acoustic emissions) | . . Variants using radiation detectors | . . . Variants using neutron detectors | . Others | |||
FB | FB00 MEANS OF HANDLING, JUDGING, OR DIAGNOSING MONITORING AND TESTING DATA |
FB01 | FB02 | FB03 | FB04 | FB05 | FB06 | FB07 | FB08 | FB09 | FB10 | |
. Variants characterized by the data transmission means | . . Variants using electrical cables | . . Variants using optical fibers | . Variants characterized by signal processing | . Variants characterized by correcting, compensating or calibrating means | . . Variants using traveling in-core probes (TIP) (e.g, traveling neutron detectors) | . Variants characterized by data processing | . Means for judging or diagnosing the results of monitoring and testing | . . Deviation from reference values | . . Use of patterns or interrelationships of monitoring data | |||
FB11 | FB12 | FB13 | FB14 | FB15 | FB16 | FB17 | FB18 | FB19 | FB20 | |||
. . Analysis of variation in and noise evaluation of monitoring data | . . Variants in which references are modified or changed | . . Variants characterized by the search for the causes of abnormalities | . . . Variants using a tree structure, e.g., cause and effect tree methods | . Variants characterized by the use of functions or equations | . Variants characterized by databases | . Variants having learning functions (including histories) | . Variants having prediction functions | . Variants using knowledge engineering, inference and artificial intelligence | . Others | |||
FC | FC00 DISTINCTIVE POINTS ASSOCIATED WITH MONITORING AND TESTING |
FC01 | FC02 | FC03 | FC04 | FC05 | FC06 | FC07 | FC08 | FC09 | FC10 | |
. Remote control | . . Handling of the construction of detected items or nuclear reactor facilities | . . Handling of monitoring apparatuses, testing apparatuses and maintenance apparatuses | . Control and adjustment | . Logic, sequencing, interlockinf, and the like | . Procedures and planning | . Consideration to relative importance, priorities, or allowances | . Means of imparting redundancy | . . Use of majority-rule redundancy methods (e.g., a two-out-of-three method) | . Measures against abnormalities in measuring systems (excluding the means in FC08) | |||
FC11 | FC12 | FC13 | FC14 | FC15 | FC16 | FC17 | FC18 | FC19 | FC20 | |||
. Simulators, teaching and training | . Sampling and transfer of samples | . Preparation of samples | . Structures and mechanisms | . Arrangement and alignment | . Materials | . Manufacture and repair | . Preparatory operations, e.g., inspection | . Items inspected and structures associated therewith | . Others | |||
FD | FD00 DISTINCTIVE FEATURES IN THE MEANS BY WHICH THE RESULTS OF MONITORING, TESTING, AND DIAGNOSIS ARE OUTPUT |
FD01 | FD02 | FD03 | FD04 | FD06 | FD07 | FD09 | FD10 | |||
. Variants using display means (i.e., visual) | . . Graphic display | . . Trend display | . . Updating and selection of displayed contents and screens | . Variants using voices (i.e., auditory) | . Alarm devices (use FD06 for items that use voices) | . Variants that output the causes of abnormalities or cause and effect relationships | . Others | |||||
GA | GA00 PURPOSE AND EFFECTS |
GA01 | GA02 | GA03 | GA04 | GA05 | GA06 | GA07 | GA08 | GA09 | GA10 | |
. Structure or handling | . . Reduced size or weight, or reduction in the number of parts | . . Ease of disassembly or ease of removal | . . Telescoping | . . Protection from and prevention of cutting | . . Prevention of stress or tension generation | . . Prevention of impact and interference | . . Prevention of adhesion | . . Improved maintainability | . . Dilution | |||
GA11 | GA12 | GA14 | GA15 | GA16 | GA17 | GA18 | GA19 | GA20 | ||||
. . Condensing in order to separate | . . Use or reuse of existing items | . Processing, functions, or software | . . Shortening of processing time, or on-line processing | . . Reduction of the number of processes | . . Prevention of malfunction | . . Improvement of stability and regeneration qualities | . . Expansion of measurement ranges | . . Specification of measurement ranges | ||||
GA21 | GA22 | GA23 | GA24 | GA25 | GA26 | GA27 | GA28 | GA29 | GA30 | |||
. . Improvement of signal-to-noise ratios, sensitivity, or precision | . . Loss reduction | . . Digitalization | . . Automation | . . Provision of multiple functions | . . Parallel processing | . Operation or control | . . Improvement of control characteristics | . . Reliable scrams or trips | . . Prevention of false scrams or trips | |||
GA31 | GA32 | GA33 | GA34 | GA35 | GA36 | GA37 | GA38 | GA39 | GA40 | |||
. . Prevention of deviation from restricted conditions | . . . Avoidance of scrams or trips | . . Prevention of operating errors | . Recognition or judgment | . Operations, planning or programs | . Radiation or radioactive substances | . . Reduction of exposure | . . Prevention of leaks | . No association with the art of this theme | . Others |