Award Data

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UNDERGROUND EXCAVATIONS IN HARD ROCK SUBJECT TO DYNAMIC LOADING CAUSED BY NUCLEAR DETONATION MAY EXPERIENCE VIOLENT COLLAPSE (ROCKBURSTING) SIMILAR TO WHAT IS OBSERVED IN DEEP MINING OPERATIONS. THIS PROPOSAL AIMS AT DEVELOPING A METHODOLOGY TO DETERMINE THE CIRCUMSTANCES FOR WHICH ROCKBURST WILL OCCUR, BASED ON THE ASSUMPTION THAT COLLAPSE OF THE CAVITY IS TRIGGERED BY A SURFACE BUCKLING OF THE W ...

THE OBJECTIVE OF THIS EFFORT IS TO ASSESS THE ACCURACY OF A RECENTLY DEVELOPED CODE, TURF2, TO PREDICT TRANSIENT EFFECTS CAUSED BY A SHOCK WAVE MOVING OVER A SAND BED, AND DIFFRACTING OVER AN OBSTACLE ON THE SURFACE AND IN A HOT LAYER OF GAS. DURING 1984, TURF2 TWO-PHASE FLOW BOUNDARY CONDITIONS AND TWO-PHASE FLOW TURBULENCE MODELING WERE IMPLEMENTED AND TESTED FOR STEADY FLOWS. RESULTS COMPARED W ...

STANDARD RADIATION TRANSPORT ANALYSIS TECHNIQUES WILL BE USED TO STUDY THE EFFECT OF SHIELD CONFIGURATION (SHAPE FACTORS, MATERIAL GRADIENTS) ON TARGET DOSE. SUCH A STUDY WILL ASSIST IN DETERMINING OPTIMAL SHIELD CONFIGURATIONS FOR PROTECTION OF MILITARY VEHICLES SUCH AS THE SMALL ICBM HARD MOBILE LAUNCHER AGAINST GAMMA RADIATION FROM NUCLEAR WEAPONS. PARTICULAR ATTENTION WILL BE PAID TO THE INCOR ...

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APTEK, AS PRIME CONTRACTOR, IN CONJUNCTION WITH GENERAL ELECTRIC COMPANY AND SRI INTERNATIONAL, AS SUBCONTRACTORS, WILL CONDUCT A STUDY TO IDENTIFY AND INVESTIGATE CANDIDATE OVERLAY MATERIALS VERSUS SYSTEM REQUIREMENTS FOR BOTH ACTIVE AND PASSIVE DECOYS. OVERLAY MATERIALS DEVELOPED BY THE NH&S COMMUNITY WILL BE CONSIDERED AS WELL AS PREVIOUSLY UNEVALUATED CANDIDATES SUCH AS RARE EARTH BORIDES. THE ...

A 2.5 MV PULSER WAS BUILT AND TESTED AS A "PROOF-OF-PRINCIPLE" FOR THE EMPRESS II THREAT LEVEL NAVY EMP TEST FACILITY. NO DISPOSITION OF THIS QUARTER SCALE PULSER HAS BEEN MADE. CASDE CORPORATION BELIEVES THAT THIS PULSER OFFERS DNA AND THE SERVICES A UNIQUE DEVICE THAT COULD BE UTILIZED FOR EMP TESTING OF NUMEROUS DOD EQUIPMENTS. CASDE PROPOSES TO: (1) IDENTIFY THE PRESENT CAPABILITIES AND PARAME ...

IF U.S. NAVY SURFACE COMBATANTS SURVIVE THE EARLY EFFECTS OF NUCLEAR WEAPON BURSTS SUCH AS AIRBLAST, THERMAL, ABIS, AND UNDEX, THERE IS STILL A REMAINING THREAT FROM THE BASE SURGE. THIS THREAT IS COUNTERED BY AN ON BOARD WASHDOWN SYSTEM. THIS STUDY WILL DETERMINE THE REGIONS OF THE BATTLE ZONE WHICH ARE (OR ARE NOT) DOMINATED BY THE BASE SURGE AND ASSESS THE BENEFIT DERIVED FROM SUCH WASHDOWN SYS ...

WE PROPOSE A NOVEL MICROWAVE GENERATION SCHEME UTILIZING LIGHT ACTIVATED SEMICONDUCTOR SWITCHES (LASS). THE PROPRIETARY CONCEPT DIFFERS FROM ALL OTHER LASS BASED GENERATION SCHEMES IN THAT IT ALLOWSTHE SEMICONDUCTOR TO OPERATE AT ITS MAXIMUM CURRENT DENSITY AND ELECTRIC FIELD CONCURRENTLY THEREBY PROVIDING FOR ONE TO TWO ORDERS HIGHER MICROWAVE POWERS THAN OTHER APPROACHES. SPECIFICALLY 10 TO THE ...

PROTECTION OF EXOATMOSPHERIC SYSTEMS AND STRUCTURES FROM NUCLEAR EFFECTS IS REQUIRED. THE MATERIAL CANDIDATE FOR THIS TYPE OF PROTECTION IS A CARBON-CARBON COMPOSITE FOR STRUCTURAL INTEGRITY AND TUNGSTEN CARBIDE COMPONENT FOR NUCLEAR HARDENING. THE CARBON-CARBON COMBINES A HIGH STRENGTH-TO-WEIGHT RATIO IN AN INTEGRAL STRUCTURAL COMPOSITE CAPABLE OF NUCLEAR HARDENING BY THE ADDITION OF TUNGSTEN CAR ...