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DETERMINATION OF URANIUM IN THE URINE OF WORKERS IS REQUIRED BY THE NRC AT NUCLEAR FACILITIES. EXTREMELY LOW CONCENTRATIONS OF URANIUM, ESPECIALLY IN SMALL SAMPLES, ARE DIFFICULT TO MEASURE USING EXISTING TECHNOLOGY. FUTURE NRC PLANS TO CHARACTERIZE BIOAVAILABLE URANIUM FRACTIONS COMPRISING THE URANIUM BODY BURDEN WILL REQUIRE EVEN HIGHER SENSITIVITIES. HIGH SENSITIVITY TECHNOLOGY DEVELOPED FOR UR ...

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STEAM GENERATOR TUBES REPRESENT A UNIQUE PART OF THE REACTOR COOLANT SYSTEM (RCS). LEAKAGE FROM ANY OTHER PART OF THE RCS IS CAPTURED BY THE CONTAINMENT BUILDING, BUT STEAM GENERATOR TUBE LEAKAGE IS TRANSPORTED OUT OF THE CONTAINMENT BUILDING ALONG WITH THE STEAM, WHICH IS NORMALLY UNCONTAMINATED. STEAM GENERATOR TUBES, CONSEQUENTLY, DESERVE, AND RECEIVE SPECIAL CONSIDERATION. THE ASSURANCE OF STE ...

ON FEBRUARY 9, 1991, AT THE MIHAMA UNIT 2 NUCLEAR POWER STATION, OPEARTED BY KANSAI ELECTRIC CORPORATION, A STEAM GENERATOR TUBE RUPTURED AND RELEASED APPROXIMATELY 9,000 GALLONS OF REACTOR COOLANT INTO THE SECONDARY SYSTEM. THE LEAKAGE CAUSED A RAPID DEPRESSURIZATION OF THE REACTOR COOLANT SYSTEM, WHICH RESULTED IN AN AUTOMATIC REACTOR TRIP AND ACTUATION OF THE HIGH PRESSURE SAFETY INJECTION SYST ...

PROGRESSION OF MOLTEN POOL, FORMED IN SEVERE ACCIDENT SCENARIOS, IS STRONGLY DEPENDENT ON ITS HEAT TRANSFER CHARACTERISTICS. THE PURPOSE OF THE PROPOSED RESEARCH IS TO PERFORM A COMPUTATIONAL ANALYSIS OF THE TURBULENT NATURAL CONVECTION IN INTERNALLY HEATED POOLS. TWO VERSIONS OF THE LOW-REYNOLDS-NUMBER MODELS WILL BE FIRST VALIDATED FOR THE PREDICTION OF TURBULENT NATURAL CONVECTION FLOWS OF INTE ...

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