The article demonstrates the advantage of the given approach over the conventional approach, where the average temperature of the coolant is determined as the arithmetic mean of the inlet and outlet coolant temperatures on the basis of a test with a sudden change in the reactor inlet coolant ...
As is known, degradation of reactor pressure vessel (RPV) steels operational parameters under reactor irradiation and operating temperatures manifests itself in the form of ultimate and yield stress value growth and formation of grain boundary and intragranular segregation followed by the decrease of mat...
Received in revised form 7 January 2015 Accepted 8 January 2015 a b s t r a c t This paper presents the results of thermal-hydraulic calculation of “Steam Line Break” analysis at full power reactor for VVER-1000/V320 units at Kozloduy Nuclear Power Plant (KNPP), done during the devel...
This dissolution mechanism also suggests that the solute will form a new distribution of nanoclusters and consequential re- embrittlement on subsequent re-irradiation at the lower operating temperature of the VVER-1000 reactor. 4. Conclusions The microstructures of a high nickel, low copper VVER-1000...
roleinthelimitationofthereactorpower.Forthesepurposes,it isdesirabletoevaluatethetemperaturevaluesmeasuredbythe thermocouplesadequately.Originally,themeasuredvalueswere assumedtobeequaltotheoutletaveragecoolanttemperatures offuelassemblies.Duringthelastfewyears,severalCFDcalcula- tionscalledattentiontothefactthatthisassumpti...
VVER-1000 reactorHELIOS codeANDREA codeThe increase of fuel cycle efficiency is crucial for all reactor operators. Burnable absorbers can compensate excess reactivity at the beginning of the cycle. They also stabilize the power distribution. The commonly used burnable absorbers are in form of Gd2O...