🔍 Key Concepts

• Contaminated drain systems and why they are kept separate from clean systems • Different types of evaporators/steam generators (single, double, triple effect, multistage flash) used on ships • How complexity vs. reliability affects equipment that handles contaminated fluids

💭 Think About

• Think about whether a system handling radioactive or chemically contaminated drains should be simple and easy to maintain, or complex and highly efficient. • Which type of steam generator is more likely to be used where high thermal efficiency is important versus where safety, isolation, and ease of decontamination are most important? • Ask yourself: in a contaminated system, is the main goal to extract maximum fresh water or to safely handle and confine contamination?

✅ Before You Answer

• Identify which options (single, double, triple effect, multistage flash) are primarily chosen for high efficiency and large output. • Identify which option is mechanically simplest with fewer stages and surfaces that could become contaminated. • Consider which design would be easiest to flush, clean, or remove if contamination levels become too high.