Delay tank design of Bandung TRIGA plate reactor

Due to no further production of TRIGA fuel elements by the fuel manufacturer of General Atomic, it is necessary to find a solution so that the TRIGA 2000 reactor can still operate. CANST with other work units in NNEA make a new breakthrough by proposing the conversion of standard TRIGA fuel to the fuel element of plate type which currently has been produced domestically. One of the concerns in the TRIGA 2000 reactor conversion activity is the rising exposure of ¹⁶N radiation in the surface of the reactor tank, since replacing the reactor core cooling modes into forced convection. Therefore it is necessary to design a delay system that is placed on the primary system, to delay the flow of cooling water with ¹⁶N content coming out of the reactor tank until exposure to ¹⁶N radiation coming out of the reactor tank to 1000 microSv/hour. This delay system can be in the form of a delay tank. The results of the study using the Fluent and Gambit program package, it is known that the three buffle delay tank can delay for 50 seconds the flow of cooling water out of the reactor tank to shed ¹⁶N for 7 times. In this paper the results of the study of the delay tank design which has three buffles to be used on the delay system of the TRIGA Plate reactor as the Bandung TRIGA 2000 reactor being converted. (author)