SAFETY AND SITTING ASSESSMENT FOR NPPs DEPLOYMENT IN INDONESIA

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SAFETY AND SITTING ASSESSMENT FOR NPPs DEPLOYMENT IN INDONESIA PANDE Made Udiyani, S. KUNTJORO, R.S. GENI Center for Nuclear Reactor Safety and Technology, National Nuclear Energy Agency of Indonesia-BATAN International Conference on Topical Issues in Nuclear Installation Safety: Safety Demonstration of Advanced Water Cooled NPPs, IAEA-Vienna 6-9 June 2017

OUTLINES INTRODUCTION METHODOLOGY RESULT AND DISCUSSION CONCLUSION 11/27/2018

Introduction Indonesia had shown that nuclear energy will be included as part of energy sources in energy mix policy. Lesson leant from Fukushima accident, the safety of NPPs need to be highlighted to improve the public acceptance of nuclear safety and security in Indonesia. To prove that the operation of a large NPPs in Bangka Belitung required analysis of radioactive release under normal conditions and postulation accident. The paper will describe the assessment of safety and radiation consequences on site for normal operation and DBA postulation of PWR-1000 MWe.

Figure 1. Map of Indonesia 11/27/2018 4

Dose (Individual and Collective) METHODOLOGY Source term Normal operation DBA postulation Plume Formation Meteorological data Dispersion Deposition Pathway: external gamma and beta from cloud shine external gamma from ground surface inhalation of cloud shine and ingestion of contaminated food Dose (Individual and Collective) Normal operation DBA postulation- Countermeasure Fig 2. Methodology approach of radiation dose calculation

Table 1. Reactor parameters for fission products inventory calculation (by ORIGEN 2) Fuel assembly matrix : 17 x 17 Number of fuel assembly : 264 rods Total mass of UO2 in fuels : 613,823.73 g Fuel composition at enrichment of 2.35%: U235 : 12,715.22 g ; U238 : 528,357.86 g ; O16: 72,750.66 g Fuel composition at enrichment of 3.40% U235: 18,396.19 g; U238 : 522,668 g, O16: 72,759.27 g Fuel composition at enrichment of 4.45% U235: 24,076.99 g; U238: 516,978.87 g: O16: 72,767.88 g Electric power : 1000 MWe Thermal power : 3100 MWth Operation time : 18 to 24 months Average fuel burnup : 50 GWd/tU

Chemical and Volume Control System (CVCS) Radionuclide inventory Clean-Up Filter (3) (4) Radionuclide inventory Primary coolant Steam Generator (2) (1) (6) Filter Off Gas System (5) Stack Containment (7) Fig 3. The calculation model for the normal operation source term The release is assumed: FP from pinholes reached 0.1%. Uranium contaminants in surface cladding can reach 10 microns uranium weight

ACCIDENT INITIATION ORIGEN The Core Inventory The failed fuel/core The released of fission product to Primary Cooling System ACCIDENT INITIATION The release to the primary containment (dry and wet phases) THE RELEASE TO THE ENVIRONMENT CONSEQUENCES & COUNTERMEASURE MELCOR RELAP-SCADAP ORIGEN PC-COSYMA Fig.4. The Assessment for Consequences and countermeasure for LB-LOCA of PWR-1000MWe

Fig 5. Release and transport of fission products for PWR-1000MWe The assumption core damaged reaches approximately 33% which is the optimal damaged based on results of the study and an agreement for LB-LOCA accident A Gaussian atmospheric dispersion code PC Cream and PC Cosyma were used to estimate the radiological doses of the released radionuclides.

3. RESULT AND DISCUSSION Fig 6. The FP activity of Core inventory, routine and LB-LOCA sourceterm

FIG.7. Individual effective doses for normal operation 3. RESULT AND DISCUSSION Fig 7a.West Bangka site FIG.7. Individual effective doses for normal operation

FIG. 8. Individual effective doses for LB-LOCA 3. RESULT AND DISCUSSION Fig.8a.West Bangka site FIG. 8. Individual effective doses for LB-LOCA

4. CONCLUSION The estimated effective doses are lower than the dose constraint of 0.3 mSv/y associated with this plant (BAPETEN). The highest individual effective dose for LBLOCA is 20.0 mSv in NW direction and 800m distance from stack. For DBA: No evacuation countermeasure will be taken based on the regulation of emergency. The assessment have proved that the construction of large NPPs in West Bangka safe and meets the safety standard for normal operation and the impact in DBA conditions. This study used as supporting data for the dissemination of nuclear power plants in Indonesia.

Thank you fOr your attention! International Conference on Topical Issues in Nuclear Installation Safety: Safety Demontration of Advanced Water Cooled NPPs, IAEA-Vienna 6-9 June 2017