Title: Comparison of Different LMFBR Primary Containment Codes Applied to a Benchmark Problem
Authors: BENUZZI Alberto
Publisher: European Commission
Publication Year: 1986
JRC N°: JRC4163
Other Identifiers: EUR 10638 EN
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC4163
Type: EUR - Scientific and Technical Research Reports
Abstract: DURING THE LAST YEARS IT HAS BEEN WIDELY RECOGNIZED THAT THE INITIATING EVENTS LEADING TO A CDA HAVE AN EXTREMELY LOW PROBABILITY OF OCCURRENCE. THEREFORE THE CDA HAS BEEN NO LONGER CONSIDERED AS A DESIGN BASIS ACCIDENT. NEVERTHELESS, CURRENT SAFETY PHYLOSOPHIES REQUIRE THAT THE CONSEQUENCES OF SUCH ACCIDENTS ON THE PRIMARY CONTAINMENT MUST BE DETERMINED IN ORDER TO EVALUATE THE "RESIDUAL" RISKS TO THE PUBLIC. DUE TO THE IMPOSSIBILITY TO REPRODUCE EXPERIMENTALLY A CDA, IT IS NECESSARY TO RELY ONLY ON COMPUTER CODE PREDICTIONS BASED ON POSTULATED ENERGY RELEASES. IN ORDER TO GAIN INCREASED CONFIDENCE IN CONTAINMENT CODE CAPABI- LITIES, SEVERAL CO-ORDINATED EFFORTS HAVE BEEN UNDERTAKEN IN THE PAST. THE COVA PROGRAMME WAS CONCERNED WITH THE SYSTEMATIC COMPARISON OF A LARGE NUMBER OF SMALL-SCALE EXPLOSIVE TESTS WITH COMPUTER CODE CALCULATIONS. THE APRICOT PROGRAMME WAS DEVOTED TO THE BENCHMARKING AND COMPARISON OF COMPUTER CODE PREDICTIONS ON A SERIES OF BASIC FLUID DYNAMIC AND STRUCTURAL DYNAMIC PROBLEMS AS WELL AS ON A LIMITED NUMBER OF SMALL-SCALE EXPLOSIVE TESTS. RECENTLY, THE CONTAINMENT LOADING AND RESPONSE (CONT) GROUP (OF THE SAFETY WORKING GROUP, FAST REACTOR CO-ORDINATING COMMITTEE OF THE CEC) MADE THE PROPOSAL OF SUBMITTING TO DIFFERENT COMPUTER CODE CALCULAIONS A CONTAINMENT BENCHNMARK PROBLEM REPRESENTING A CDA OCCURRING IN A FULL-SIZE POOL-TYPE LMFBR. THE LAY-OUT OF THE PROBLEM WAS DETERMINED WITH THE HELP OF THE FIRM BELGO-NUCLEAIRE UNDER A STUDY CONTRACT FINANCED BY DG XII. FIVE ORGANISATIONS NAMELY UKAEA-RISLEY, JRC-ISPRA, CEA-CADARACHE, ENEA- BOLOGNA AND PHYSISC INT.-GOUDA PARTECIPATED TO THE EXERCISE WITH SIX COMPU- TER CODES. THE RESULTS OBTAINED ARE REVIEWED AND DISCUSSED. THE CODE TO CODE VARIATIONS, TAKEN INTO ACCOUNT SOME DIFFERENCES IN MODEL- LING, HAVE BEEN EXPLAINED AND FOUND ENTIRELY ACCEPTABLE.
JRC Institute:Joint Research Centre Historical Collection

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