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WORKSTATION AND EXPERT SYSTEM TECHNOLOGIES HAVE A POTENTIAL OF SUBSTANTIALLY FACILITATING THE DEVELOPMENT AND EVALUATIONOF FAULT TREES. INTRODUCING A WORKSTATION PHILOSOPHY WITH AN INTERACTIVE SET OF INTEGRATED SOFTWARE TOOLS ON A LOCAL COMPUTER WILL PROMOTE IMPROVED CONTINUITY IN THE THOUGHT PROCESS DURING A FAULT TREE DEVELOPMENT. THE EXPERT SYSTEM TECHNOLOGY WILL SIMPLIFY THE WAY FAULT TREES AR ...

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THIS PROPOSAL IS DIRECTED TO THE DEVELOPMENT OF A PROCEDURE FOR GENERATING LONG STREAMFLOW SEQUENCES. IT IS PROPOSED TO FIRST DEVELOP A LONG SEQUENCE OF HOURLY RAINFALL BY STOCHASTIC METHODS AND TO TRANSFORM THIS RAINFALL SEQUENCE INTO STREAMFLOW WITH A DETERMINISTIC HYDROLOGIC MODEL. PHASE I WILL FOCUS ON THE A STOCHASTIC RAINFALL MODEL CAPABLE OF DEVELOPING RAINFALL SEQUENCES AT MULTIPLE SITES. ...

WITHIN A LABORATORY ENVIRONMENT, EMATS HAVE BEEN USED TO CHARACTERIZE DEFECTS IN BOTH FERRITIC AND AUSTENITIC WELDS . THE USE OF SHEAR-HORIZONTAL (SH) WAVES HAS PROVEN PART DEFECTS. FOR FRACTURE MECHANICS EVALUATION OF WELDED STRU STRUCTURES, IT IS PARTICULARLY IMPORTANT TO KNOW THE THROUGHEXTENT OF PLANAR DEFECTS. THIS PROPOSAL SEEKS SUPPORT FOR THE EVALUATION OF A NEW APPROACH TO WELD DEFECT CHA ...

IN-REACTOR MEASUREMENTS INVOLVING ELECTROCHEMICAL POTENTIAL A NUMBER OF BOILING WATER REACTORS (BWRS) SUGGEST THAT THE WATER CHEMISTRY OF THE PRIMARY COOLANT OF EACH BWR MAY BE UNIQUE WITH RESPECT TO ITS ABILITY TO FACILITATE IGSCC AND/ OR MAY CHANGE WITH REACTOR OPERATING TIME OR AGE. THE WORK PROPOSED IS TO GATHER, REVIEW, ORGANIZE, COMPILE, C COMPUTERIZE, AND ANALYZE IN-REACTOR DATA PERTAINING ...

MRC PROPOSES TO DEVELOP A SAFETY PERFORMANCE INDICATOR (PI) OF THE ELECTROMAGNETIC (EM) PROTECTION STATUS OF A NUCLEAR POWER PLANT (NPP). WE BELIEVE THAT SUCH A PI IS NEEDED BECAUSE: (1) EM ENVIRONMENTAL POLLUTION IS ON THE INCREASE,(2) ADDITIONAL EM THREATS MUST BE EVALUATED, AND (3) DISRUPTION OF NPP OPERATIONS BY EM EFFECTS CAN AND MUST BE AVOIDED. PREVIOUS STUDIES HAVE ADDRESSED THE ISSUE OF E ...

THIS PROGRAM DEALS WITH THE EVALUATION OF LIQUID LEVEL DETECTION DATA OBTAINED DURING THE MT-4 EXPERIMENT, WHICH IS THE LAST TEST PERFORMED IN THE LOCA SIMULATION IN NRU REACTOR PROGRAM. THESE DATA OFFER THE POTENTIAL OR RELATINGTHE ONLY FULL-LENGTH IN REACTOR REFLOOD INFORMATION ON N NUCLEAR-POWERED PWR FUEL BUNDLES TO COLLAPSED LIQUID LEVEL AND TWO-PHASE COOLING OF DEFORMED AND RUPTURED FUEL BUN ...

THIS PROGRAM DEALS WITH USING THE DIGITIZED VIDEO TDR LIQUIDLEVEL DATA PREPARED UNDER CONTRACT (NRC-04-84-146) OF THE MEMT-4 TEST FROM THE LOCA SIMULATION IN NRU PROGRAM. THESE NEW DATA AND TECHNIQUES WILL BE APPLIED TO ESTIMATE THE VOIDFRACTION, LIQUID LEVEL, AND LOCAL HEAT TRANFER CONDITIONS FOR THE OTHER NRU TESTS WHERE ONLY SELF POWERED NEUTRON DETECTORS (SPND'S) AND THERMOCOUPLE DATA ARE AVAI ...

INSPECTION OF PAINTED OR COATED CARBON STEEL SURFACES OFTEN INVOLVES THE REMOVAL OF THE COATING PRIOR TO INSPECTION, ESPECIALLY WHEN THE USE OF MAGNETIC PARTICLE TESTING (MT) IS REQUIRED. IN THE CASE OF EXAMINATION OF CONTAINMENT VESSEL WALLS IN NUCLEAR POWER PLANTS, THE REMOVAL IS TIME CONSUMING, RESULTING IN INCREASED RADIATION EXPOSURE TO WORKERS. IN ADDITION, THE REMOVAL MUST BE DONE WITHOUT C ...