"http://www.isvav.cz/projectDetail.do?rowId=TB03SUJB002"^^ . . "Experimental and analytic works needed for validation of the In-Vessel-Melt-Retention strategy as final solution for the severe accident mitigation for the VVER 1000/320 type NPP"@en . "The core melt retention stratedy in t he reactor pressure ve ssel in the course of the severe accident is at present verified and applied for NPPs even for high power output. For NPPs of VVER type is approved for type VVER 440/213. Application witha qualified assessment of the core melt retention in the reactor pressure vessel for NPPs of the higher power, for our case it means for type VVER 1000/320 is not proved yes. With respect to the global containmnet configuration and the location of the bottom of the reactor shat at the elevation 13,7 n the IVR strategy is optimal solution not only from the point of view of the potential impacts of the SA elimination. On that account the final target is to analyse the available results from analytical work, where we apply the advantage of the JRC Petten Benchmark calculations for type VVER 1000/320, which will be done by qualified group of an European expert organisations. The established results we will use as boundary conditions for the implementation of the proposed experiments. These experiments will be performed with the target to verify the proposed engineering solution: deflector and porous spraying (cold spray), which are apart from an additional injection of the cooling water in the reactor pressure vessel. All of them are useful tools for ensuring the transfer of the heat flux with the sufficient margin against to the critical heat flux, which would generate a melting of the reactor pressure vessel wall. We also propose to elaborate a basic engineering solution of the large experiment in the scale around 1:1 which will fully simulate the shape of the semieliptical lower head and full transition to the cylindrical vessel."@en . "Koncepce udr\u017Een\u00ED coria uvnit\u0159 tlakov\u00E9 n\u00E1doby reaktoru v pr\u016Fb\u011Bhu t\u011B\u017Ek\u00E9 hav\u00E1rie je v sou\u010Dasn\u00E9 dob\u011B prov\u011B\u0159ena a aplikov\u00E1na u JE s mal\u00FDm a st\u0159edn\u00EDm v\u00FDkonem. V p\u0159\u00EDpad\u011B VVER elektr\u00E1ren, je p\u0159ijata pro VVER 440/213. Aplikace s kvalifikovan\u00FDm pr\u016Fkazem udr\u017Eitelnosti coria uvnit\u0159 TNR pro JE s vy\u0161\u0161\u00EDm v\u00FDkonem, v na\u0161em p\u0159\u00EDpad\u011B VVER 1000/320 nen\u00ED doposud prok\u00E1z\u00E1na. S ohledem na celkovou konfiguraci kontejnmentu a um\u00EDst\u011Bn\u00ED dna \u0161achry reaktoru ve v\u00FD\u0161ce 13,7 m je koncepce IVR jednozna\u010Dn\u011B optim\u00E1ln\u00EDm \u0159e\u0161en\u00EDm nejenom z hlediska okam\u017Eit\u00E9ho \u0159e\u0161en\u00ED n\u00E1sledk\u016F SA, ale i z hlediska p\u0159\u00EDpadn\u00FDch d\u016Fsledk\u016F likvidace SA. Jednozna\u010Dn\u00FDm c\u00EDlem je proto analyzovat dostupn\u00E9 v\u00FDsledky v\u00FDpo\u010Dtov\u00FDch anal\u00FDz, kde uplatn\u00EDme v\u00FDhodu Benchmark v\u00FDpo\u010Dt\u016F pro VVER 1000/320 vysoce kvalifikovan\u00E9ho t\u00FDmu evropsk\u00FDch expert\u016F a v\u00FDpo\u010Detn\u00EDch k\u00F3d\u016F. Zji\u0161t\u011Bn\u00E9 v\u00FDsledky jednozna\u010Dn\u011B pou\u017Eijeme jako okrajov\u00E9 podm\u00EDnky pro realizaci navr\u017Een\u00FDch experiment\u016F. Experimenty budou provedeny s c\u00EDlem prov\u011B\u0159it navr\u017Een\u00E1 in\u017Een\u00FDrsk\u00E1 \u0159e\u0161en\u00ED: deflektor a por\u00E9zn\u00ED n\u00E1st\u0159ik, kter\u00E9 jsou krom\u011B dodate\u010Dn\u00E9ho vst\u0159iku chlad\u00EDc\u00ED vody dovnit\u0159TNR, jedin\u00FDmi praktick\u00FDmi n\u00E1stroji zabezpe\u010Duj\u00EDc\u00ED odvod tepeln\u00ED\u00E9ho toku s dostate\u010Dnou rezervou proti kritick\u00E9mu tepeln\u00E9mu toku, kter\u00FD by zp\u016Fsobil protaven\u00ED st\u011Bny TNR. Sou\u010Dasn\u011B navrhujeme vypracovat z\u00E1kladn\u00ED in\u017Een\u00FDrsk\u00E9 \u0159e\u0161en\u00ED velk\u00E9ho experimentu v m\u011B\u0159\u00EDtku cca 1:1 z hlediska d\u00E9lky zku\u0161ebn\u00EDho vzorku po obvodusemieliptick\u00E9ho dna s p\u0159echodem do v\u00E1lcov\u00E9 \u010D\u00E1sti TNR v\u010Detn\u011B zah\u00E1jen\u00ED realizace topn\u00FDch element\u016F. Realizace tohoto experimentu je bezesporu velmi n\u00E1ro\u010Dn\u00E1 a bez proveden\u00ED v\u0161ech v\u00FD\u0161e uveden\u00FDch aktivit jej nen\u00ED mo\u017En\u00E9 navrhnout a zah\u00E1jit. Na druhou stranu kone\u010Dn\u00E9 rozhodnut\u00ED o realizaci koncepce IVR bez popsan\u00FDch v\u00FDpo\u010Dtov\u00FDch a experiment\u00E1ln\u00EDch prac\u00ED, v\u010Detn\u011B velk\u00E9ho experimentu nen\u00ED rovn\u011B\u017E mo\u017En\u00E9 kvalifikov\u011B zd\u016Fvodnit. Proto navrhujeme logiku postup\u00E9 verifikace ov\u011B\u0159en\u00E9 v\u00FDpo\u010Dtov\u011B i experiment\u00E1ln\u011B." . " Reactor Pressure Vessei" . " Deflector" . " Critical Heat Flux (CHF)" . . "In Vessei Retention (IVR); Corium; Corium Pool; Critical Heat Flux (CHF); High Velocity Participle Consolidation (HVPC)/ Porous Coating; Deflector; Reactor Pressure Vessei; Internals; Semieliptical Lower Head; Spherical Lower Head; ASTEC Code; MELCOR Co\u2026"@en . . " Corium" . . "2016-06-30+02:00"^^ . . . " ASTEC Code" . . . "0"^^ . "Experiment\u00E1ln\u00ED a analytick\u00E9 pr\u00E1ce nutn\u00E9 pro validaci koncepce udr\u017Een\u00ED roztaven\u00E9ho coria uvnit\u0159 TNR jako \u0159e\u0161en\u00ED kone\u010Dn\u00E9 f\u00E1ze t\u011B\u017Ek\u00E9 hav\u00E1rie pro VVER 1000/320" . " Corium Pool" . . "0"^^ . . " High Velocity Participle Consolidation (HVPC)/ Porous Coating" . "1"^^ . . "0"^^ . "0"^^ . . " Spherical Lower Head" . . . " Semieliptical Lower Head" . "2015-01-01+01:00"^^ . . "TB03SUJB002" . . "2015-04-10+02:00"^^ . "In Vessei Retention (IVR)" . " Internals" . .