Award Data

AN ANALYTIC MODEL IS DEVELOPED FOR COMPUTING THE BLOWOFF IMPULSE DISTRIBUTION ON SMALL BODIES. CORRELATIONS ARE MADE BETWEEN MODEL PREDICTIONS AND UGT DATA. THE MODEL IS SIMILAR IN PHYSICAL BASIS, SPEED, AND SIMPLICITY TO THE BBAY FORMULATION FOR ONE-DIMENSIONAL BLOWOFF IMPULSE. AN GT AND UGT EXPERIMENT TECHNIQUE IS DEVELOPED SPECIFICALLY TO SUBSTANTIATE THE TWO-DIMENSIONAL MODELS AND TO PROVIDE D ...

ENVIRONMENTAL DISTURBANCES PRODUCED BY HIGH-ALTITUDE NUCLEAR DETONATIONS ARE WIDESPREAD AND PERSISTENT. DATA FROM ATMOSPHERIC TESTS (LATE 50'S, EARLY 60'S) PLUS EXTENSIVE RESEARCH EFFORTS ARE THE BASIC FOR UNDERSTANDING THE NUCLEAR ENVIRONMENT AND RESULTANT SYSTEMS EFFECTS. HOWEVER, ALL NUCLEAR TESTS AND MOST SUBSEQUENT BASIC RESEARCH HAVE INVOLVED ONLY SINGLE EXPLOSIONS. BALLISTIC MISSILE DEFENSE ...

THE CONTRACTOR SHALL DEVELOP A FUZZY SET METHODOLOGY FOR UNCERTAINTY ANALYSIS IN PROBABILISTIC SEISMIC SAFETY ASSESSMENT OF NUCLEAR POWER PLANTS. FUZZY SET LOGIC WILL BEUSED FOR COLLECTING, QUANTIFYING AND PROPAGATING SUBJECTIVE,ENGINEERING JUDGEMENT USED IN THE UNCERTAINTY ANALYSIS. IN PHASE I, FEASIBILITY OF THE PROPOSED APPROACH WILL BE DEMONSTRATED BY APPLYING IT TO SELECTED PARTS OF A PROBABI ...

AS NUCLEAR PLANTS GROW OLDER, ENVIRONMENTAL CONDITIONS MAY AFFECT THE PERFORMANCE OF PLANT CONCRETE AND STEEL STRUCTURES. WE PROPOSE TO DEVELOP A STRATEGY WHICH CAN BE APPLIED TO CONCRETE STRUCTURES. IT WILL BE DIRECTED TOWARDSTHE DEVELOPMENT OF METHODS TO ANALYZE AND UNDERSTAND AGING EFFECTS, INCLUDING THE COMBINED EFFECTS OF TIME, TEMPERATURE, RADIATION, HUMIDITY, STRESS, CHEMICAL ENVIRONMENT AN ...

MODELING OF THE AMBIENT AND PROMPT IONOSPHERIC REGIONS IN A THIN LAYER APPROXIMATION ALLOWS AN EFFICIENT METHOD OF DETERMINING THE TIME EVOLUTION, PROPAGATION, AND SIGNAL STRENGTH OF THE 0-10 SECOND MHD EMP ASSOCIATED WITH HIGH ALTITUDE NUCLEAR DETONATIONS.

AT PRESENT, COMPUTERS ARE AVAILABLE WITH ENORMOUS QUANTITIES OF CORE STORAGE AND EXTREMELY FAST COMPUTATIONAL CAPABILITIES AS COMPARED WITH COMPUTERS JUST A FEW YEARS OLD. IN THE NEXT YEAR OR TWO, EVEN MORE DRAMATIC INCREASES IN MEMORY AND COMPUTATIONAL SPEED WILL BECOME AVAILABLE. OF IMPORTANCE TO DNA/RAAE IS THE FACT THAT THESE NEW COMPUTERS WILL ALLOW THE CALCULATION OF HIGH ALTITUDE NUCLEAR WE ...

THE OBJECTIVE OF THE PROPOSED RESEARCH IS TO BUILD A USER-FRIENDLY, PERSONAL COMPUTER BASED WORKSTATION FOR PERFORMING TRAC-BWR ANALYSIS. THE SOFTWARE WILL ALLOW A USER TO READ-IN DATA FROM EXISTING TRAC-BWR INPUT DECKS (ASCII), DRAW NODALIZATION DIAGRAM, MODIFY INPUT, AUTOMATICALLY RENODALIZE THE VESSEL, CHAN AND PIPE COMPONENTS, GENERATE INPUT DECK, SUBMIT JOB, BRING BACK PLOTDATA, DISPLAY RESUL ...

AN "INHALATION SCREENING DOSE COLLAR-STANCHION MONITOR" WITHEMBEDDED MINIATURE THIN-WALL GEIGER-MUELLER RADIATION DETECTORS EVALUATES THE THYROID GLAND FOR NANOCURIE ACTIVITYINVENTORY. THE PRIMARY TECHNICAL OBJECTIVE IS TO ESTABLISH THAT THE "COLLAR-STANCHION MONITOR" WILL BE CAPABLE OF DETECTING WITHIN 15 SECONDS AND WITH 2 SIGMA CONFIDENCE AN ACTIVITY INVENTORY OF 0.7 NANOCURIES OF I-131 DOSE EQ ...

THE PROBLEM OF GAS DYNAMIC FLOW PROPERTY MEASUREMENT IN PARTICLE LADEN FLOWS IS ADDRESSED VIA AN ADVANCED NUMERICAL MODEL SIMULATION STUDY OF PRESSURE GAUGE RESPONSE. THE APPROACH UTILIZES A HIGH-ORDER ACCURATE NUMERICAL SOLUTION TECHNIQUE FOR TURBULENT TWO-PHASE FLOWS. GAUGES OF EXISTING DESIGN SUCH AS THE GREG/SNOB GAUGES WILL BE ANALYZED OVER A RANGE OF CLEAN AND DUSTY AIRBLAST FLOW ENVIRONMENT ...

A PHYSICAL PROPERTY OF EARTH FORMATIONS THAT STRONGLY INFLUENCES THE RATE OF ATTENUATION OF A SHOCK WAVE IS THE BULK VOLUME OF AIR OR GAS ENTRAINED IN THE POROSITY. AS A RESULT, THE ACCURATE DETERMINATION OF THIS GAS VOLUME IS IMPORTANT FOR PREDICTING THE EFFECT OF A SHOCK WAVE ON SUBSURFACE STRUCTURES. THE OIL AND GAS INDUSTRY HAS USED GEOPHYSICAL WELL LOGS FOR YEARS TO IDENTIFY AND EVALUATE THE ...