Development, Qualification Testing and Computer Code Requirements for a Refittable Supercritical Water Primary Heat Transport System

Abstract

The power output of current Pressurized Heavy Water Reactors (PHWRs) can be doubled by refitting them with a higher temperature and pressure primary heat transport system [1]. The refit involves a modular replacement of the primary heat transport system and fuel channels that is similar to work undertaken during current refurbishments. The refit is enabled by new fuel channel materials and a new channel closure and fueling machine that require development testing. This paper examines the testing, computer code and standard development needed as input to design the first refit. The types of test facilities and computer code development needed are discussed along with possible sources of supply, while maintaining a focus on capabilities currently available in Canadian industry. The paper provides a roadmap to finalize technology, analytical methods and standards for first refit implementation.