The Application of Disk-type Burnable Absorber in the Soluble-Boron-Free ATOM Core

2020 ◽  
Author(s):  
S. Jang ◽  
Y. Kim ◽  
X. Nguyen
Keyword(s):  
Free Atom ◽  
Burnable Absorber ◽  
Atom Core

Impacts of an ATF cladding on neutronic performances of the soluble‐boron‐free ATOM core

2020 ◽  
Vol 44 (10) ◽  
pp. 8193-8207
Author(s):  
Xuan Ha Nguyen ◽  
Seongdong Jang ◽  
Yonghee Kim
Keyword(s):  
Free Atom ◽  
Atom Core

Free‐atom core binding energies from x‐ray photoelectron spectroscopy I. Zinc and cadmium

1978 ◽  
Vol 68 (2) ◽  
pp. 696-699 ◽  
Author(s):  
M. S. Banna ◽  
D. C. Frost ◽  
C. A. McDowell ◽  
B. Wallbank
Keyword(s):  
Photoelectron Spectroscopy ◽  
Binding Energies ◽  
Free Atom ◽  
X Ray ◽  
Atom Core

scholarly journals Truly-Optimized PWR Lattice for Innovative Soluble-Boron-Free Small Modular Reactor

2021 ◽  
Author(s):  
Xuan Ha Nguyen ◽  
Seongdong Jang ◽  
Yonghee Kim
Keyword(s):  
High Performance ◽  
Local Power ◽  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Control Rod ◽  
Low Leakage ◽  
Small Modular Reactor ◽  
Burnable Absorber ◽  
Safety Parameters ◽  
Atom Core

Abstract A novel re-optimization of fuel assembly (FA) and new innovative burnable absorber (BA) concepts are investigated in this paper to pursue a high-performance soluble-boron-free (SBF) small modular reactor (SMR), named autonomous transportable on-demand reactor module (ATOM). A truly optimized PWR (TOP) lattice concept has been introduced to maximize the neutron economy while enhancing the inherent safety of an SBF pressurized water reactor. For an SBF SMR design, the 3-D centrally-shielded BA (CSBA) design is utilized and another innovative 3-D BA called disk-type BA (DiBA) is proposed in this study. Both CSBA and DiBA designs are investigated in terms of material, spatial self-shielding effects, and thermo-mechanical properties. A low-leakage two-batch fuel management is optimized for both conventional and TOP-based SBF ATOM cores. A combination of CSBA and DiBA is introduced to achieve a very small reactivity swing (<1,000 pcm) as well as a long cycle length and high fuel burnup. For the SBF ATOM core, safety parameters are evaluated and the moderator temperature coefficient is shown to remain sufficiently and similarly negative throughout the whole cycle. It is demonstrated that the small excess reactivity can be well managed by mechanical shim rods with a marginal increase in the local power peaking, and a cold-zero shutdown is possible with a pseudo checker-board control rod pattern. In addition, a thermal-hydraulic-coupled neutronic analysis of the ATOM core is discussed.

scholarly journals Truly-optimized PWR lattice for innovative soluble-boron-free small modular reactor

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xuan Ha Nguyen ◽  
Seongdong Jang ◽  
Yonghee Kim
Keyword(s):  
High Performance ◽  
Local Power ◽  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Control Rod ◽  
Low Leakage ◽  
Small Modular Reactor ◽  
Burnable Absorber ◽  
Safety Parameters ◽  
Atom Core

AbstractA novel re-optimization of fuel assembly and new innovative burnable absorber (BA) concepts are investigated in this paper to pursue a high-performance soluble-boron-free (SBF) small modular reactor (SMR), named autonomous transportable on-demand reactor module (ATOM). A truly optimized PWR (TOP) lattice concept has been introduced to maximize the neutron economy while enhancing the inherent safety of an SBF pressurized water reactor. For an SBF SMR design, the 3-D centrally-shielded BA (CSBA) design is utilized and another innovative 3-D BA called disk-type BA (DiBA) is proposed in this study. Both CSBA and DiBA designs are investigated in terms of material, spatial self-shielding effects, and thermo-mechanical properties. A low-leakage two-batch fuel management is optimized for both conventional and TOP-based SBF ATOM cores. A combination of CSBA and DiBA is introduced to achieve a very small reactivity swing (< 1000 pcm) as well as a long cycle length and high fuel burnup. For the SBF ATOM core, safety parameters are evaluated and the moderator temperature coefficient is shown to remain sufficiently and similarly negative throughout the whole cycle. It is demonstrated that the small excess reactivity can be well managed by mechanical shim rods with a marginal increase in the local power peaking, and a cold-zero shutdown is possible with a pseudo checker-board control rod pattern. In addition, a thermal–hydraulic-coupled neutronic analysis of the ATOM core is discussed.

Free atom core binding energies from X‐ray photoelectron spectroscopy. II. Na, K, Rb, Cs, and Mg

1978 ◽  
Vol 68 (12) ◽  
pp. 5459-5466 ◽  
Author(s):  
M. S. Banna ◽  
B. Wallbank ◽  
D. C. Frost ◽  
C. A. McDowell ◽  
J. S. H. Q. Perera
Keyword(s):  
Photoelectron Spectroscopy ◽  
Binding Energies ◽  
Free Atom ◽  
X Ray ◽  
Atom Core

Brønsted Acid-Catalyzed Solvent-Controlled Regioselective Hydrothiolation and Diastereoselective Cascade Cyclization of Dienes

2021 ◽  
Author(s):  
Kai Ji ◽  
Ka Lu ◽  
Jie Huang ◽  
Zi-Hao Li ◽  
Tong-Mei Ding ◽  
...  
Keyword(s):  
Free Atom ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Cascade Cyclization ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
First Time

A highly regio- and diastereo-selective Brønsted acid-catalyzed tandem hydrothiolation/Friedel-Crafts reaction of linear 1,3-dienes has been developed for the first time, which provides a metal-free, atom-economic and concise way of constructing...

scholarly journals A phosphine-free, atom-efficient cross-coupling reaction of triorganoindiums with acyl chlorides catalyzed by immobilization of palladium(0) in MCM-41

RSC Advances ◽  
2017 ◽  
Vol 7 (67) ◽  
pp. 42570-42578 ◽  
Author(s):  
Jiankang Miao ◽  
Bin Huang ◽  
Haiyi Liu ◽  
Mingzhong Cai
Keyword(s):  
Schiff Base ◽  
Schiff Base Complex ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Free Atom ◽  
Acyl Chlorides ◽  
Base Complex ◽  
Cross Coupling Reaction ◽  
Mcm 41

The phosphine-free, atom-efficient cross-coupling of triorganoindiums with acyl chlorides has been achieved using a recyclable MCM-41-immobilized palladium(0)–Schiff base complex.

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