Results 11 to 20 of about 293 (170)

Crud deposition in KER loops at pH 10 LiOH [PDF]

, 1963
One of the problems which may be encountered in the operation of NPR, or of any similar pressurized-water reactor, is the deposition of crud in the reactor core, particularly on the surfaces of the fuel elements. This crud consists primarily of iron oxides resulting from the corrosion of the piping. It has generally been found to deposit preferentially
Dickinson, D. R., Demmitt, T. F.
openaire   +3 more sources

CRUD deposition in accelerated high-temperature water: Investigation on the effect of substrate material and water chemistry

Journal of Nuclear Materials, 2020
Deposition of corrosion products (CRUD) on micro-orifice specimens under accelerated flow conditions was investigated in high-temperature water on several substrate materials (SS 304L, Titanium, Alloy 690, Zirlo and magnesia stabilised Zirconia) and water chemistries (0-2 ppm of Li, 0-2.5 ppm of H2). Regardless of the substrate material, no significant
Cassineri, Stefano, Duff, Jonathan, Curioni, Michele, Banks, Andrew, Scenini, Fabio   +4 more
openaire   +2 more sources

The DISNY facility for sub-cooled flow boiling performance analysis of CRUD deposited zirconium alloy cladding under pressurized water reactor condition: Design, construction, and operation

Nuclear Engineering and Technology, 2023
The CRUD on the fuel cladding under the pressurized water reactor (PWR) operating condition causes several issues. The CRUD can act as thermal resistance and increases the local cladding temperature which accelerate the corrosion process.
Ji Yong Kim, Yunju Lee, Ji Hyun Kim, In Cheol Bang   +3 more
doaj   +2 more sources

Finite Element Modelling to Investigate the Mechanisms of CRUD Deposition in PWR [PDF]

, 2017
Corrosion Related Unidentified Deposition (CRUD) in PWR may cause severe issues, such as Tube Support Plate (TSP) blockage, fuel cladding cracking, and subsequently increased radiation doses for workers. The primary objective of this work is to develop an all-inclusive deposition model, which will reproduce the morphology and elucidate the contributing
Wu, Jiejie, Stevens, Nicholas, Scenini, Fabio; id_orcid 0000-0002-8974-4860, Connolly, Brian; id_orcid 0000-0003-3075-8333, Banks, Andy, Powell, Andrew, Pegg, Lara-Jane   +6 more
openaire   +3 more sources

Finite Element Modelling of the Electrokinetic Mechanism of CRUD Deposition in Accelerating Flow [PDF]

n p j Materials Degradation, 2020
An electric model using the finite element method (FEM) has been generated to verify the electrokinetic phenomenon that has been postulated to be responsible for the localised corrosion deposition (CRUD) in the nuclear industry. The model shows that the acceleration of a resistive fluid through a micrometre scale pipe restriction leads to the spatial ...
Connolly, Brian, Stevens, Nicholas, Scenini, Fabio   +2 more
core   +3 more sources

Investigating the effect of hydrodynamics and coolant chemistry on CRUD deposition in regions of accelerated fluid flow. [PDF]

, 2023
CRUD deposition on the surface of micro-orifice flow restrictions (300 µm in diameter) were conducted in simulated PWR primary water containing either LiOH or KOH water as a function of hydrodynamics conditions and autoclave refresh rate. It was found that the CRUD volume on the front surface of the orifice, and the morphology of the non-soluble ...
Smith, Liam, Johnstone, Peter, Duff, Jonathan, Lee, Nathan, Lord, Fred, Curioni, Michele, Scenini, Fabio   +6 more
core   +4 more sources

Development of a crud deposition model in boiling water reactors

Deposition of crud onto fuel rods in boiling water reactors (BWR) can cause safety related issues such as decreased heat transfer, decreased flow of coolant and be the source of activated corrosion products. This project focused on developing a crud deposition model for BWR with normal water chemistry in collaboration with Westinghouse Electric Sweden ...
Ormsdóttir, Arna
core   +3 more sources

Functional and Organic Foods in Enhancing the Oral and Dental Health and Hygiene-A Comprehensive Review. [PDF]

Food Sci Nutr
Functional and organic foods contain effective and bioactive compositions. Organic foods and foods enriched with phytochemicals provide promising oral health. Functional foods and beverages in the diet can control and treat oral illnesses ABSTRACT Maintaining oral and dental hygiene, it is significantly related to individuals' quality of life as well ...
Aleebrahim-Dehkordi E, Sheibaninia A, Ghasemi Pirbalouti A.   +2 more
europepmc   +2 more sources

A CIPS risk evaluation methodology applicable for PWR

He jishu, 2021
BackgroundDuring pressurized water reactor (PWR) power operation period, corrosion products tend to deposit in the fuel boiling zone and form chalk rivers unidentified deposit (CRUD).
MENG Shuqi, HU Yisong, LI Changying, RUAN Tianming, LIAO Jiapeng   +4 more
doaj   +1 more source

Experimental Study of Flow Boiling in Layer-by-layer Deposition of SiO2 to Simulate CRUD Layer on Surface of Fuel Cladding

Yuanzineng kexue jishu, 2023
The fuel cladding in nuclear reactors is subjected to long periods of high temperature and pressure operation, and a certain degree of reaction control is accomplished by adding chemicals such as boric acid to the coolant, which puts the fuel cladding ...
DENG Rining;CAI Jiejin
doaj   +1 more source