JOYO 75MWt Start-up test report; PT-12 Heat transfer characteristics of IHX and DHX

Doi, Motoo*; Endo, Masayuki*; not registered; not registered; not registered; Wada, Hozumi*; Hirose, Tadashi*

The purpose of this test is to confirm that the heat transfer characteristics of the intermediate heat exchangers (IHX) and the dump heat exchangers (DHX) satisfy their design values. Each primary and secondary heat transport systems has two loops (A&B) and each secondary loop has two DHX's as terminal heat exchangers. The IHX/DHX heat transfer characteristics are measured under normal steady-state operating conditions (at 25, 40, 50, 65 and 75MWt), and also under special steady-state conditions (low sodium temperature, low secondary sodium flow rate) The major test results were : (1)The heat transfer coeffients of the IHX's and the DHX's measured in the reactor power range of 50 to 75 MWt closely matched predicted values. (2)The pressure drop in the DHX air flow, duct based on measured blower outlet pressure was less than the predicted value. This report presents the results of these plant tests.