Award Data

ALTHOUGH THE ASP (ACCIDENT SEQUENCE PRECURSOR) METHODOLOGY FOR ANALYZING OPERATIONAL DATA AND EVENTS FOR PRECURSORS TO SEVERE ACCIDENTS HAS BEEN IN EXISTENCE FOR ABOUT A DECADE, IT DOES NOT NOW INCORPORATE THE ANALYSIS OF PRECURSORS TO EARTHQUAKE-INITIATED AND INTERNAL-FIRE-INITIATED ACCIDENT SEQUENCES. THIS PROJECT'S OBJECTIVE IS TO FILL THIS GAP BY DEVELOPING SUCH A METHODOLOGY. THE OBJECTIVE OF ...

THE OBJECTIVE OF THIS PROJECT IS TO DEVELOP A MEASUREMENT-BASED METHODOLOGY AND A TOOL SET TO IMPLEMENT THE METHODOLOGY FOR PROBABILISTIC ANALYSIS OF OPERATIONAL DATA FROM NUCLEAR FACILITIES TO PROVIDE SYSTEMATIC AND OBJECTIVE EVALUATIONS OF RELIABILITY AND AVAILABILITY. THE RESULTS WILL BE A PARTICULAR USE FOR DEDICATION OF COMMERCIAL GRADE DIGITAL INSTRUMENTATION AND CONTROL (I&C) SYSTEMS IN NUC ...

WE PROPOSE TO EXPLOIT THE PROPERTIES OF OUR NEW, FAST, BRIGHT SCINTILLATOR, YAIO3:CE(+3) (YAP), TO CONSTRUCT A DETECTOR FOR PHOTONS WITH ENERGIES FROM 20 KEV TO 3 MEV. AN ARRAY OF THESE INDIVIDUAL DETECTORS WILL SERVE AS THE BASIS FOR A BROAD-BAND Y-RAY DOSIMETER CAPABLE OF MEASURING EXPOSURES FROM 5 MR/H TO 1 R/H AND EQUIVALENT DOSES FROM 5 X 10(-2) TO 10 (+4) MSV/H. THEA ADVANTAGES OF YAP SCINTI ...

THE DIFFICULTY IN PREDICTING STRUCTURAL DEGRADATION RATES FOR NUCLEAR POWER PLANT COMPONENTS DUE TO CORROSION AND OTHER FACTORS HAS LED TO THE NEED FOR COSTLY, TIME CONSUMING INSPECTIONS AND INCREASED COST FROM INTENTIONALLY OVERDESIGNED COMPONENTS. THE SITUATION INDICATES A SERIOUS, UNMET NEED FOR A SIMPLE BUT ACCURATE SYSTEM FOR REAL- TIME, IN SITU, NONDESTRUCTIVE ANALYSIS OF NUCLEAR POWER PLANT ...

THE RESEARCH PROGRAM WILL DEVELOP A MICROCOMPUTER BASED SYSTEM OF HARDWARE AND SOFTWARE WHICH WILL ALLOW THE USER TOEXECUTE MAINFRAME BASED CODES ON THE MICROCOMPUTER. IN ADDITION PARALLEL EXECUTION OF SEVERAL CODES AT ONCE IS POSSIBLEA SPECIAL INPUT AND OUTPUT PROCESSOR MODULES WILL ALSO BE DEVELOPED TO DEMONSTRATE THE USER FRIENDLY CAPABILITIES OF THE SYSTEM AND FACILITATE INPUT PREPARATION AND ...

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IT IS NECESSARY TO ESTIMATE J-R OR JI DATA FOR AGING AND RE-SIDUAL LIFE STUDIES, USING DATA FROM SURVEILLANCE CAPSULE SPECIMENS THAT REFLECT THE CURRENT STATE OF THE PRESSURE VESSEL STEEL. AN IMPROVED MODEL IS NEEDED THAT WILL PREDICT J J-R DATA FROM CHARPY DATA, TENSILE PROPERTIES, MATERIAL COM-POSITION AND OTHER MEASURABLE PROPERTIES. SUCH A MODEL WILLBE DEVELOPED UNDER THIS PROJECT, USING INNOV ...

SEVERAL STATES ARE CURRENTLY SEEKING MUCH-NEEDED NEW LOW-LEVEL RADIOACTIVE DISPOSAL SITES IN ACCORDANCE WITH THE LOW-LEVEL RADIOACTIVE WASTE POLICY ACT OF 1980. ANY NEW COMMERCIALREQUIREMENT THAT A SITE BE CAPABLE OF BEING MODELED AND THATITS PERFORMANCE BE ASSURED FOR 500 YEARS. FOR MOST SITES, THE HYDROGEOLOGICAL AND RADIONUCLIDE TRANSPORT CHARACTERIS- TICS OF THE UNSATURATED ZONE ARE MAJOR FACT ...