Study on Characteristic of Temperature Coefficient of Reactivity for Plutonium Core of Pebbled Bed Reactor

Zuhair,; Suwoto, Suwoto; Setiadipura, Topan; Bakhri, Syaiful; Sunaryo, Geni Rina

doi:10.1088/1742-6596/962/1/012058

Cited by 13 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of calculations performed for the MCNP6 high HTGR-10 MWth critical core with pebble fuel ratio to pebble moderator at 52:48 occurs at a height of 134 cm. At the center of the terrace has a gamma dose level of 3.0052E+05 mSv/h, while in the biological shield is made of ordinary concrete with a density of 2.3 g/cm 3 is at the outer circumference of the HTGR10 MWth core has a gamma dose level decreased following equation y = 0.0042 e-0.03x…”

Section: Resultsmentioning

confidence: 99%

“…In the reflector area contain there are 10 holes locations control rod, 7 holes absorber balls, 3 irradiation holes and 20 holes with helium cooling. The reactor was then surrounded by Reactor Cavity Cooling System (RCCS) contain dry air that serves to cool the reactor pressure tank, then coated biological radiation shield which made of regular concrete with a density of 2.3 g/cm 3 . In this paper, description of HTGR 10MWth was made following design of the HTR-10.…”

Section: Htgr-10 Mwthmentioning

confidence: 99%

“…One of application from the inherent safety concept on HTGR10 MWth is the concept of negative reactivity. In the concept of negative reactivity reactor, the process of fission reactions on the HTGR 10 MWth reactor is always in controlled conditions so that the core and reactor fuel will never melt in the event of an accident [1][2][3][4][5][6][7][8]. This condition occurs because core construction materials and reactor fuels of HTGR 10 MWth pebble bed reactor are dominated by graphite elements which can absorb neutrons, so the reactor core is always in a state of negative reactivity.…”

Section: Introductionmentioning

confidence: 99%

“…In this part of the active high-top core there is a void with a thickness of 41.698 cm and a reflector on this part. The cooling medium composed of the inert helium gas and control rods made of B 4 C having a density of 10.4 g/cm3…”

mentioning

confidence: 99%

See 3 more Smart Citations

GAMMA DOSE RATE ANALYSIS IN BIOLOGICAL SHIELDING OF HTGR-10 MWth PEBBLE-BED REACTOR

Adrial

Hamzah²,

Hartini³

2019

urania

View full text Add to dashboard Cite

GAMMA DOSE RATE ANALYSIS IN BIOLOGICAL SHIELDING OF HTGR-10 MWth PEBBLE BED REACTOR. HTGR-10 MWth is a high-temperature gas-cooled reactor. The fuel and moderator are pebble shaped with a radius of 3 cm. One fuel pebble consists of thousands of UO2 kernels with a density of 10.4 gram/cc and the enrichment rate of 17%. The core of HTGR-10 MWth is the center of origin of neutrons and gamma radiation resulting from the interaction of neutrons with pebble fuel, moderator and biological shield. The various types of radiations generated from such nuclear reactions should be monitored to ensure the safety of radiation workers. This research was conducted using MCNP-6 Program package with the aim to calculate and analyze gamma radiation dose in biological shield of HTGR-10 MWth. In this study, the biological shield is divided into 10 equal segments. The first step of the research is to benchmark the created program against the critical height of HTR-10. The results of the benchmarking show an error rate of ± 1.1327%, while the critical core height of HTGR 10 MWth for the ratio of pebble fuel and pebble moderator (F:M) of 52: 48 occurs at a height of 134 cm. The rate of gamma dose at the core is 3.0052E + 05 mSv/hr. On the biological shield made of regular concrete with a density of 2.3 grams/cc, the rate of gamma dose decreases according to an equation y = 0.0042 e-0.03x. Referring to Perka Bapeten no 4 of 2013, the safe limits for workers and radiation protection officers will be achieved if the minimum thickness of biological shield is 115 cm with gamma dose rate of 0 mSv/hour.Keywords: Gamma dose rate, HTGR 10 MWth, biological shield, pebble

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Htgr-10 Mwthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

GAMMA DOSE RATE ANALYSIS IN BIOLOGICAL SHIELDING OF HTGR-10 MWth PEBBLE-BED REACTOR

Adrial

Hamzah²,

Hartini³

2019

urania

View full text Add to dashboard Cite

show abstract

“…The reactor core was modeled by expanding to the BCC unit cell using the repeated structure constructed by the UNIVERSE and combination of LATTICE and FILL options. This modeling procedure was used in various publications since it was introduced by Lebenhaft in 2001 [12][13][14][15][16][17][18][19].…”

Section: Modeling Of Reactor Corementioning

confidence: 99%

The effects of fuel type on control rod reactivity of pebble-bed reactor

et al. 2019

View full text Add to dashboard Cite

As a crucial core physics parameter, the control rod reactivity has to be predicted for the control and safety of the reactor. This paper studies the control rod reactivity calculation of the pebble-bed reactor with three scenarios of UO 2 , (Th,U)O 2, and PuO 2 fuel type without any modifi cations in the confi guration of the reactor core. The reactor geometry of HTR-10 was selected for the reactor model. The entire calculation of control rod reactivity was done using the MCNP6 code with ENDF/B-VII library. The calculation results show that the total reactivity worth of control rods in UO 2 -, (U,Th)O 2 -, and PuO 2 -fueled cores is 15.87, 15.25, and 14.33%k/k, respectively. These results prove that the effectiveness of total control rod in thorium and uranium cores is almost similar to but higher than that in plutonium cores. The highest reactivity worth of individual control rod in uranium, thorium and plutonium cores is 1.64, 1.44, and 1.53%k/k corresponding to CR8, CR1, and CR5, respectively. The other results demonstrate that the reactor can be safely shutdown with the control rods combination of CR3+CR5+CR8+CR10, CR2+CR3+CR7+CR8, and CR1+CR3+CR6+CR8 in UO 2 -, (U,Th)O 2 -, and PuO 2 -fueled cores, respectively. It can be concluded that, even though the calculation results are not so much different, however, the selection of control rods should be considered in the pebble-bed core design with different scenarios of fuel type.

show abstract

Study on the Characteristics of Effective Delayed Neutron Fraction (βeff) for Pebble-Bed Reactor with Plutonium Fuel

Zuhair

Suwoto

Setiadipura

et al. 2019

Iran J Sci Technol Trans Sci

View full text Add to dashboard Cite

Study on Characteristic of Temperature Coefficient of Reactivity for Plutonium Core of Pebbled Bed Reactor

Cited by 13 publications

References 3 publications

GAMMA DOSE RATE ANALYSIS IN BIOLOGICAL SHIELDING OF HTGR-10 MWth PEBBLE-BED REACTOR

GAMMA DOSE RATE ANALYSIS IN BIOLOGICAL SHIELDING OF HTGR-10 MWth PEBBLE-BED REACTOR

The effects of fuel type on control rod reactivity of pebble-bed reactor

Study on the Characteristics of Effective Delayed Neutron Fraction (βeff) for Pebble-Bed Reactor with Plutonium Fuel

Contact Info

Product

Resources

About