Analysis of uncontrolled dilution of boric acid concentration in the reactor VVER-1000/320

Kerntechnik ◽  
2019 ◽  
Vol 84 (4) ◽  
pp. 322-333
Author(s):  
J. Hádek ◽  
R. Meca
Keyword(s):  
Boric Acid ◽  
Acid Concentration ◽  
Boric Acid Concentration

Execution of 18 Month Refueling Modification and Experience Feedback

2010 ◽  
Author(s):  
Guo-long Sheng ◽  
Yang Pu
Keyword(s):  
Boric Acid ◽  
Acid Concentration ◽  
Field Experience ◽  
Fuel Cycle ◽  
Technical Specification ◽  
Physical Experiment ◽  
Set Point ◽  
Nuclear Plants ◽  
Operation Procedure ◽  
Boric Acid Concentration

The article presents how to plan, organize, and put in practice of the 18-months fuel cycle project on the newly built up nuclear plants. Some problems related to the field experience of modification and the amelioration suggestions are also provided. It’s involved that operation procedure modification, operation technical specification modification, test period prolongation, set point adjustment, boric acid concentration adjustment, re-start physical experiment and so on.

Influence of boric acid concentration on silicon carbide morphology

1995 ◽  
Vol 14 (15) ◽  
pp. 1052-1054 ◽  
Author(s):  
LJ. S. čerović ◽  
S. K. Milonjić ◽  
N. M. Bibić
Keyword(s):  
Silicon Carbide ◽  
Boric Acid ◽  
Acid Concentration ◽  
Carbide Morphology ◽  
Boric Acid Concentration

Analysis of Accumulation and Crystallization of Boric Acid in the Reactor Core during WWER Emergency Operation

2017 ◽  
Vol 743 ◽  
pp. 389-393 ◽  
Author(s):  
Andrei V. Morozov ◽  
Anna V. Pityk ◽  
Sergei V. Ragulin ◽  
Aleksandra S. Soshkina
Keyword(s):  
Boric Acid ◽  
Acid Concentration ◽  
Reactor Core ◽  
Emergency Operation ◽  
The Core ◽  
Acid Accumulation ◽  
Hand Calculation ◽  
New Generation ◽  
Boric Acid Concentration

The results of hand calculation of boric acid accumulation in the core in a new generation WWER-TOI reactor in case of LOCA are presented. Variants of reducing the H3BO3 concentration in the HA-3 system down to 1, 2, 4 and 8 g/kg are considered. The mass of boric acid deposits on the core internals depending on the value of boric acid concentration in the HA-3 system is determined. The obtained results allow concluding that the accumulation and crystallization of boric acid in the core is possible.

scholarly journals Effects of Boric Acid Concentration and Shading on Growth, Leaf Physiology, and Anatomy of Guzmania

HortScience ◽  
2006 ◽  
Vol 41 (3) ◽  
pp. 618-621 ◽  
Author(s):  
C.Y. Kuo ◽  
D.M. Yeh
Keyword(s):  
Boric Acid ◽  
Acid Concentration ◽  
Leaf Growth ◽  
Dry Weight ◽  
Leaf Physiology ◽  
Half Strength ◽  
Leaf Necrosis ◽  
Induced Changes ◽  
Leaf Boron ◽  
Boric Acid Concentration

Guzmania lingulata (L.) Mez. `Cherry' were grown in coco chips and fertigated with half-strength Hoagland solution containing various concentrations of boric acid. Excessive boron induced changes in growth, relative chlorophyll content, and leaf anatomy were investigated. Plants treated with 5 mg·L–1 or higher boric acid concentration had reduced SPAD-502 readings and Fv/Fm values and increased leaf necrosis in the lower leaves. Boron was distributed unevenly within a leaf, with the maximum concentration in the leaf tip. Increased necrotic length and new leaves with necrosis were evident where average whole leaf boron concentration was higher than 170 μg·g–1 on dry weight basis. More leaf growth and higher transpiration or stomatal conductance were recorded in plants under 40% (average 676 μmol·m–2·s–1 PPF at noon) than 76% (average 270 μmol·m–2·s–1 PPF at noon) shade. Excessive boron was not found to affect epidermal cells or water storage tissue, but caused browning and shriveling of the chlorenchyma cells.

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