Hydrodynamicproblemsofheavyliquidmetalcoolantstechnologyinloop-typeandmono-block-typereactorinstallationsOriginalResearchArticle

Inthereport,theinfluenceofhydrodynamicsoftheloopwithheavyliquidmetalcoolants(PbandPb–Bi)ontherealizationmethodsandefficiencyofthecoolanttechnologyforthereactorinstallationsofloop,improvedloopandmono-blocktypeofdesignhasbeenstudied.Thelasttwotypesofinstallations,asarule,arecharacterizedbythefollowingfeatures:availabilityofloopsectionswithlowhydraulicheadandlowcoolantvelocities,largesquaresofcoolantfreesurfaces;absenceofstopandregulatingvalve,auxiliarypumpsonthecoolantpumping-overlines.Becauseofthedifferenthydrodynamicconditionsintheinstallationtypes,thetasksofthecoolanttechnologyhavespecificsolutions. Thedescriptionofthefollowingproceduresofcoolanttechnologyisgiveninthereport:purificationbyhydrogen(purificationusinggasmixturecontaininghydrogen),regulationofdissolvedoxygenconcentrationincoolant,coolantfiltrating,controlofdissolvedoxygenconcentrationincoolant. Itisshownthatchangeoftheloopdesignmadewitheconomicpurposeandforimprovementoftheinstallationsafetycauseadditionalrequirementstotheproceduresandapparatusesofthecoolanttechnologyrealization.