The importance of nuclear energy as a realistic option to solve the issues of the depletion of energy resources and the global environmental has been reacknowledged worldwide, and there is an increasing trend toward the deployment of fast reactors (FRs) as well as the expansion of light water reactor (LWR) technology. In response to this international movement, we decided to gather a collection of papers which covers the topical areas of concern for fast reactors and advanced light water reactors, compiling the most recent findings, and to publish these as a special issue of Science and Technology of Nuclear Installations.

The main topic of this special issue is the fast reactors and advanced light water reactors for sustainable development. More specifically, the central subject is verification & validation (V&V) in the fields of reactor physics and thermohydraulics to prove safety of fast reactors and advanced light water reactors. Potential topics include, but are not limited to:

• Validation of neutronics design methods for FRs and advanced LWRs
• Reactor physics experiments required for the development of FRs and advanced LWRs
• Thermohydraulics modeling and V&V for FRs and advanced LWRs, including low-flow conditions and natural circulation, as well as innovative passive methods for removing decay heat
• Severe accident modeling for FRs and advanced LWRs

Before submission authors should carefully read over the journal's Author Guidelines, which are located at http://www.hindawi.com/journals/stni/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/ according to the following timetable: