*** NRR : APPLICATION TO THE REGULATORY PROCESS *** *** NRR: IMPACT OF RESULTS *** USER OFFICE REVIEWER: F. PAGANO PAGE: 46 OBTAINED. THE RIL TITLE: "FESEM" ADVERSARY SEQUENCE EVALUATION MODEL METHODS FOR FIXED-SITE THEFT AND SABOTAGE PREVENTION SYSTEMS. A FORCIBLE ATTACK BY AN ADVERSARY INTENT ON CREATING AN ACT OF SABOTAGE OR THEFT. THE RESULT OF THE FESEM ANALYSIS INCLUDE ESTIMATES OF THE PROBABILITY OF SABOTAGE OR THEFT HINS CAND LOSSES) BASED ON ATTACK FORCE THE PROGRAM IS CURRENTLY AVAILABLE FOR NRC USE VIA AN ACCESS CODE NUMBER TO SANDIA'S COMPUTER. REQUIREMENTS, LICENSING, INSPECTION AND OTHER MONITORING OPERATIONS. OFFICE: NMSS IMPACT STATEMENT TEST APPLICATIONS ARE BEING CONDUCTED TO DETERMINE USER SUITABILITY. THE KEY TO THE UTILITY OF EVALUATION MODELS IS THE RATIO OF THE EFFORT REQUIRED TO RUN THE MODEL TO THE USEFULNESS OF THE RESULTS. THE RESULTS OF THE EFFORTS WILL BE USED IN DEVELOPMENT OF STANDARDS FOR SAFEGUARDS SYSTEMS AS WELL AS BY LICENSEES IN DEVELOPING FRAP-53 IS A BEST-ESTIMATE COMPUTER CODE THAT CALCULATES THE THERMAL AND MECHANICAL RESPONSE CHARACTERISTICS OF A NUCLEAR FUEL ROD 1. STORED ENERGY RADIAL TEMPERATURE DISTRIBUTIONS AT GIVEN AXIAL LOCATIONS TOTAL FISSION GAS RELEASE ROD INTERNAL GAS PRESSURE AND COMPOSITION CLAD DEFORMATION AMOUNT OF PELLET-CLAD INTERACTION (PCI) FUEL DEFORMATION (SWELLING, DENSIFICATION, RELOCATION, AND THERMAL EXPANSION) FUEL-CLAD GAP SIZE AND GAP CONDUCTANCE CLAD-CORROSION AND HYDRIDING. ALL OF THESE QUANTITIES ARE STRONGLY DEPENDENT UPON THE OPERATING HISTORY OF THE ROD, AND EACH WILL HAVE A LARGE EFFECT ON THE THE VERIFICATION OF THE FRAP-S3 CODE HAD TWO MAJOR OBJECTIVES: (1) TO DETERMINE THE CODE PERFORMANCE IN PREDICTING THE AVAILABLE, STEADY-STATE FUEL PERFORMANCE CODES ARE REVIEWED BY NRR AS PART OF LOCA AND OTHER ACCIDENT ANALYSIS. NRR USES AN INDEPENDENT NRC-DEVELOPED CODE FOR AUDIT PURPOSES IN THESE REVIEWS. *** NRR: IMPACT OF RESULTS *** NO DIRECT IMPACT. NRR USES THE GAPCON SERIES OF CODES IN AUDIT WORK AS IT HAS DONE SINCE BEFORE FRAP-S WAS DEVELOPED. NRR HAS NO PLANS TO USE FRAP-S IN THIS CAPACITY. *** NRR COMMENTS AND REMARKS *** THE FRAP-S CODE WAS DEVELOPED BY RES TO INITIALIZE VARIOUS ANALYSIS CODES. RES AND NRR HAVE RECOGNIZED THE DUPLICATE GAPCON AND FRAP-S CODE EFFORTS AND HAVE CONSOLIDATED THESE EFFORTS INTO A HYBRID CODE FRAPCON. FRAPCON WILL CONTAIN SOME ELEMENTS FROM FRAP-53, BUT FRAP-S DEVELOPMENT WILL BE DISCONTINUED. THE ENGINEERING METHODOLOGY STANDARDS BRANCH PLANS TO USE THE RESEARCH RESULTS IN ITS ONGOING DEGRADED CORE COOLING TASK AND IN ESTIMATING THE FISSION PRODUCT SOURCE TERM FOR ENVIRONMENTAL ENVELOPE STANDARDS ACTIVITY. RESULTS MAY ALSO BE USED IN THE ECCS RULE CHANGE EFFORT AND, IN THE LONG TERM, IN REGULATORY GUIDES RELATED TO CORE DESIGN. |