Azizul Khakim; Bapeten. Theanalysis is intended to take a look the condition of safety parameters such as fuel and cladtemperature, and minimum safety margin against flow instability (S) in the occurrence ofinadvertent control rod withdrawal at nominal power, which is performed by PARET/ANLCode. The accident is initiated when all control rods are simultaneously withdrawn withmaximum speed of 0.0564 cm/s which consequently gives maximum reactivity insertion rateLtplLtt = 2.82 x 10-4/s.resulting in the Reactor Protection System (RPS) respond to scram thereactor by dropping the control rods into the 'core. Theprimary cooling system is assumed to bein normal operation. It is postulated that thefirst trip signal from over power is not effective toscram the reactor. but only the second signal from Floating Limit Value eventually causes ascram with 0.5 s delays. During the occurrence of inadvertent control rods withdrawal at 30MW of initial power, the maximum fuel and clad temperature reach 181.29CCand 137.62CC,respectively and the peak power of 37.11MW. Meanwhile the minimum value of () reaches 2.62.Therefore, during the occurrence of control rods withdrawal at initial power of 30 MW, theintegrity of fUel and clad can be maintained secure since they do not exceed the maximum limitof fuel and clad temperature of 207 CCand 1~5 CC,respectively and the minimum value of S isstill higher than the design limit of 1.48for anticipated transient.Kev words: Application, PARET/ANL. Inadvertent Control Rod Withdrawal, RSG GAS
