Focal Interest
Focal Interest
AI Summary of Peer-Reviewed Research

This page presents an AI-generated summary of a published research paper. The original authors did not write or review this article. [See full disclosure ↓]

Publishing process signals: STRONG — reflects the venue and review process. — venue and review process.

Passive safety systems handled the cold-leg LBLOCA in the SCW-SMR study

An abandoned nuclear power plant control room featuring curved green control panels with numerous circular gauges and switches, a large curved desk with measurement instruments, and a distinctive arched ceiling with skylight, photographed in wide landscape orientation with natural light flooding the empty facility.
Research area:Nuclear engineeringNuclear reactor physics and engineeringSystem safety

What the study found

The study found that the cold-leg loss-of-coolant accident, a large break in a cold-leg pipeline inside containment, could be handled by passive safety systems in the SCW-SMR concept. It also found that high-pressure injection was not required, while hot-leg steam blowdown was crucial.

Why the authors say this matters

The authors say the work helps identify the minimum set of safety systems required for this reactor concept. The study suggests this is important for assessing cooling and flooding conditions in the reactor vessel flow path under the initiating event considered.

What the researchers tested

The researchers used an Apros system code model of the SCW-SMR concept and carried out a parameter analysis. They examined 27 cases of the 200% guillotine break of one cold-leg pipeline inside containment to study steady-state and transient behavior, safety-system performance, and in-vessel heat removal.

What worked and what didn't

Passive safety systems were reported to be sufficient for the cold-leg LBLOCA event. High-pressure injection was not needed, but hot-leg steam blowdown was described as crucial, and effective in-vessel heat removal was also provided even without low-pressure injection.

What to keep in mind

The abstract does not describe detailed case-by-case results beyond the summarized findings. It also does not provide quantitative performance values in the available summary.

Key points

  • The study examined a cold-leg loss-of-coolant accident in the SCW-SMR reactor concept.
  • Passive safety systems were reported to be enough to handle the event.
  • High-pressure injection was not required in the cases studied.
  • Hot-leg steam blowdown was described as crucial.
  • The analysis used an Apros system code model and 27 cases of a 200% guillotine break.

Disclosure

Research title:
Passive safety systems handled the cold-leg LBLOCA in the SCW-SMR study
Publication date:
2026-03-03
DOI:
10.1016/j.nucengdes.2026.114833
OpenAlex record:
View
AI provenance: AI provenance information is not available for this post.

More posts