SOURCE TERM CALCULATION OF 20 MWe SMALL PB-BI COOLED NON-REFUELING NUCLEAR POWER REACTOR (SPINNOR 20MWe)

• Main Author: (NIM : 24908004); Pembimbing 1 : Dr. Zaki Suud; Pembimbing 2 : Dr. Ir. Ari Darmawan Pasek, IMRON
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16038
• Institution: Institut Teknologi Bandung

In this study, Source term calculation of small Pb-Bi cooled, 15 year nonrefueling reactor 20 MWe (SPINNOR 20MWe) has been performed. The study is included on fuel cell calculation, flux distribution, power distribution, activity, toxicity, thyroid and whole body dose. The reactor have average power density 187 watt/cm3 and with near zero postulated accident propability. The LOCA <br /> <br /> <br /> <br /> probability less then PWR type because low operating pressure. The coolant freezing in room temperature can protect further material leakage during hypothetical accident. Antisipated accident by design capable to protect reactor from unprotected transient over power and unprotected loss of flow accident without scram. <br /> <br /> <br /> <br /> In the adopted hypothetical accident scenario, there is a sabotation in vessel and core melt down after the loss of coolant accident. Core inventory factor on final cycle is 3,69E+9 Ci/MWth. It is assumed that except elemental iodine and noble gas, all radionuclides were traped in containment. The source term in containmen 1,8 h after accident for Noble Gas group is 2,38E+09 Ci, Halogen group is 5,12E+08 Ci, Alkali metal group is 3,04E+08 Ci, Tellerium group is 3,99E+07 Ci, BaSr group is 6,80E+07 Ci, Noble Metal group is 2,91E+06 Ci, Lanthanide group is 1,72E+06 Ci, Cerium group is 8,12E+07 Ci. Np-237 is the longest for clearance time about 16,500 years, the most toxic is Xe-138 with &#945;/D reach 7,38E+19. <br /> <br /> <br /> <br /> The Source term is used to estimate thyroid dose, in EPZ is 0,89 rem and in LPZ is 0,055 rem which are below limit constrain of PWR, 180 rem and 130 rem respectively. The whole body dose in EPZ and LPZ is 0,00132 rem dan 0,000269 <br /> <br /> <br /> <br /> rem while PWR Standards are 9,74 rem dan 8,54 rem. Based on acceptance criteria of PWR type, the safety requirement of SPINNOR 20MWe is achieved.