For use in commercial light water reactors ( LWR ), the most prevalent power reactors in the world, uranium is enriched to 3 to 5 % < sup > 235 </ sup > U. Fresh LEU used in research reactors is usually enriched 12 % to 19. 75 % U-235, the latter concentration being used to replace HEU fuels when converting to LEU.

Hot fuel is always less reactive than cold fuel ( over / under moderation in LWR is a different topic ).

A Light water reactor ( LWR ) uses water in the form that occurs in nature, and require fuel that is enriched in fissile isotopes, typically uranium enriched to 3-5 % in the less common isotope U-235, the only fissile isotope that is found in significant quantity in nature.

The LWR is being built on the site of the demolished cooling tower of the experimental Magnox reactor.

The signalling used on the LWR is very basic but still forms a vital part of the operations.

The light water reactor ( LWR ) is a type of thermal reactor that uses normal water as its coolant and neutron moderator.

Though electricity generation capabilities are comparable between all these types of reactor, due to the aforementioned features, and the extensive experience with operations of the LWR, it is favored in the vast majority of new nuclear power plants, though the CANDU / AHWR has a comparatively small ( but quite dedicated ) following.

The reason for near exclusive LWR use aboard nuclear naval vessels is the level of inherent safety built in to these types of reactors.

Lutheran World Relief ( LWR ) is an international nonprofit organization specializing in International Development and Disaster Relief.

LWR is a capacity building organization who works with local partner organizations that are " made up of or involve local community members.

LWR focuses on health-related causes, and is currently partnering with the Lutheran Church-Missouri Synod and the United Nations Foundation to raise $ 45 million for malaria education, treatment and prevention.

LWR centers all of its work in a philosophy & framework called “ accompaniment .” Rooted in the Lutheran tradition that believes empowerment and justice happen only by ‘ standing with ’, rather than ‘ doing for ’ others in need, accompaniment is a dynamic relationship between diverse partners with complementary resources and skills working together to empower poor communities to improve their lives.

Accompaniment is not only a relationship between LWR and its partners, but a process of working together.

By making use of this fuel which would otherwise have been disposed of as waste the TVA is saving millions of dollars in fuel costs and accumulating a database of recycled uranium reactions in LWR use.

The on-site reprocessing of fuel means that the volume of nuclear waste leaving the plant is tiny compared to LWR spent fuel.

The electrorefined spent fuel is highly radioactive, but because new fuel need not be precisely fabricated like LWR fuel pellets but can simply be cast, remote fabrication can be used, reducing exposure to workers.

The IFR also has a smaller volume of fuel, since the fissile material is diluted with fertile material by a ratio of 5 or less, compared to about 30 for LWR fuel.

The IFR core requires more heat removal per core volume during operation than the LWR core ; but on the other hand, after a shutdown, there is far less trapped heat that is still diffusing out and needs to be removed.

Long Way Round ( LWR ) is a documentary television series, DVD set and book documenting the journey of Ewan McGregor and Charley Boorman from London to New York on motorcycles.

The NRC is aware of this barrier, and has held a number of public reviews to devise a new scheme that would make it financially feasible to build and operate small reactors, while at the same time maintaining appropriate level of protection at large LWR installations, the latest of which took place in December 2010, setting January 2011 as the time frame for preparation of official white paper proposal.

* Both sides agreed to cooperate to replace North Korea's graphite-moderated reactors with light water reactor ( LWR ) power plants, to be financed and supplied by an international consortium ( later identified as the Korean Peninsula Energy Development Organization or KEDO ) by a target date of 2003 ;

* STR ( Submarine Thermal Reactor ) — Reactors Designed by Argonne National Laboratory: LWR Technology Development

In the wake of the 2004 Southeast Asia Tsunami, Newsweek ranked LWR as one of the best international relief agencies, giving the Lutheran group an " A +" rating.

In 2010 a 2, 000 gas centrifuge uranium enrichment plant to produce low enriched uranium ( LEU ) fuel began operating, and construction started on the experimental 25 to 30 MWe LWR, with a target operation date for the reactor of 2012.

To see a video on the LWR appeal for Haiti, by the current president John Nunes, click on this link:

According to its website, LWR promotes sustainable development by helping communities increase the quality of life, engage in Fair Trade, and be better equipped to handle emergencies.

In its emergency and development work, LWR uses accompaniment to work through existing structures and organizations (“ partners ”) where and whenever possible to foster community empowerment and to ensure resources are used to maximum effect.

LWR seeks to be a catalyst for, and facilitator of, development and social change led by local organizations and impoverished people.

Pressurized water reactors ( PWRs ) constitute the large majority of all Western nuclear power plants and are one of three types of light water reactor ( LWR ), the other types being boiling water reactors ( BWRs ) and supercritical water reactors ( SCWRs ).

LWR also works to ensure that people know the rights they have as citizens and are able to take an active role in their local governments.

Amount of fissile material needed could be a limiting factor to very widespread deployment of fast reactors, if stocks of surplus weapons plutonium and LWR spent fuel plutonium are not sufficient.

Unlike reactors that use relatively slow low energy ( thermal ) neutrons, fast neutron reactors need nuclear reactor coolant that does not moderate or block neutrons ( like water does in an LWR ) so that they have sufficient energy to fission actinide isotopes that are fissionable but not fissile.

Nuclear transmutation | Transmutation flow between < sup > 238 </ sup > Pu and < sup > 244 </ sup > Cm in Light water reactor | LWR. Transmutation speed not shown and varies greatly by nuclide .< sup > 245 </ sup > Cm –< sup > 248 </ sup > Cm are long-lived with negligible decay.

RepU recovered from light water reactor ( LWR ) spent fuel typically contains slightly more U-235 than natural uranium, and therefore could be used to fuel reactors that customarily use natural uranium as fuel.

* DPRK's graphite-moderated 5MWe nuclear reactor, and the 50 MWe and 200 MWe reactors under construction, which could easily produce weapons grade plutonium, would be replaced with two 1000MW light water reactors ( LWR ) power plants by a target date of 2003.

* Oil for heating and electricity production would be provided while DPRK's reactors were shut down and construction halted, until completion of the first LWR power unit.

On May 31, 2006, KEDO decided to terminate the LWR construction project.

; LWR: The Long-Wave Radar was used by the GRUNT and PLASMA experiments.

The propulsion unit would get in the way of the deployment of the LWR instrument and ARGUS platform and has to be jettisoned before the primary science phase can begin.

In 2009 North Korea announced its intention to build an indigenous experimental light water reactor ( LWR ) and the uranium enrichment technology to provide its nuclear fuel.

In November 2011, satellite imagery indicated that the LWR construction was progressing rapidly, with the concrete structures largely completed.

Following the building of this experimental LWR, North Korea intend to build larger LWRs for electricity generation.

He transferred this sound to pirate radio station LWR in 1987.

The pirate radio station London Weekend Radio ( LWR ) became the home of hip hop and Tim Westwood, who pioneered LWR, recruited members for the British chapter of the Zulu Nation through the pirate radio station.

The family of nuclear reactors known as light water reactors ( LWR ), cooled and moderated using ordinary water, tend to be simpler and cheaper to build than other types of nuclear reactor ; due to these factors, they make up the vast majority of civil nuclear reactors and naval propulsion reactors in service throughout the world as of 2009.