Award Data

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 ...

N/A

OF REACTOR THERMAL-HYDRAULICS CODES. THESE CODES HAVE INTERNATIONAL APPLICABILITY. TRADING THESE CODES, WITH APPROPRIATE SUPPORT, TO OTHER COUNTRIES IN EXCHANGE FOR USEFUL DATA OR OTHER RESOURCES WOULD ENHANCE THEIR UTILITY AND REDUCE THE COST TO THE U.S. OF GENERATING EQUIVALENT DATA. THE OBJECTIVE OF THE PROPOSED EFFORT IS TO PROVIDE A SOUND TECHNICAL BASIS FOR SUCH AN EXCHANGE BY: IDENTIFYING C ...

COMMON CAUSE FAILURE ANALYSIS (CCFA) IS AN IMPORTANT ELEMENTOF A COMPLETE PROBABILISTIC RISK ASSESSMENT (PRA) SINCE COMMON CAUSE FAILURE IS OFTEN A DOMINANT FACTOR IN THE RISK POSED TO PUBLIC HEALTH AND SAFETY FROM NUCLEAR POWER PLANT ACCIDENTS. A MAJOR PROBLEM ASSOCIATED WITH PERFORMING A CFFA IS THE ABSENCE OF SUPPORTING QUALITATIVE OR QUANTITATIVE COMPONENT FAILURE DATA. EXTENSIVE AMOUNTS OF CO ...

N/A

WHEN IT IS NECESSARY TO RAISE A MARINE PIPELINE FOR REPAIR DUE TO TRAWLER SNAG, ETC., THE PIPELINE WILL BUCKLE, AND THEN THE BUCKLE WILL PROPAGATE IF ALL CONDITIONS ARE NOT PROPER. WITH SEVERE BUCKLES, THE PIPE WILL BREAK OPEN ALLOWING THE OIL TO SPILL. THIS CAN BE MINIMIZED BY PERIODICALLY PLACING REMOTELY OPERABLE VALVES IN THE LINE FOR CUTOFF. BUT SOMETIMES THE PIPELINE ROTATES AS IT IS BEING L ...

USING RADIO TELEMETRY MODEMS, IS CURRENTLY POSSIBLE. THIS IS NECESSARY BECAUSE LACK OF MONITORING CAUSES INADEQUATE CONTROL OF INTERNAL CORROSION TAKING PLACE INSIDE OFFSHORE PIPELINE SYSTEMS. THE NET RESULT IS PIPELINE FAILURE DUE TOTHE EFFECTS OF CORROSION. THE RESULT OF PIPELINE FAILURE WILL BE AN OIL SPILL IN COASTAL WATERS. AS THE NATION'S OFFSHORE PIPELINE SYSTEM GROWS OLDER, THE NET EFFECTS ...

N/A