Discussion Overview
The discussion revolves around the feasibility of solidifying deuterium oxide (D2O) at room temperature through compression, particularly in the context of its use as a moderator in nuclear engineering applications. Participants explore the phase behavior of D2O and alternative materials for moderation.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- Some participants reference the phase diagram of water, suggesting that solid D2O could be achieved at room temperature under pressures above 1 GPa, but express doubts about the practicality of maintaining such conditions in a reactor setting.
- There is a discussion about the impracticality of using solid D2O in large volumes for reactors, with some suggesting it might be feasible for small samples in experiments.
- One participant questions the necessity of using D2O ice specifically, proposing alternatives like zirconium deuteride (ZrD) and hydrocarbon compounds such as paraffin, citing their properties.
- Another participant acknowledges ZrD as a studied option due to its low absorption cross section but dismisses paraffin for use with 14MeV neutrons due to its cross section and size limitations.
Areas of Agreement / Disagreement
Participants express differing views on the practicality of solidifying D2O at room temperature and the suitability of alternative materials for moderation. No consensus is reached on the best approach or material.
Contextual Notes
Participants note limitations related to the pressures required for solidification and the specific applications in nuclear engineering, which may affect the feasibility of the proposed solutions.