The SSN: an emergency system based on intentional coolant depressurization for PWRs

G. Petrangeli, R. Tononi, F. D'Auria, M. Mazzini

Research output: Contribution to journalArticle

3 Citations (Scopus)


The SSN is an emergency system, based on intentional primary depressurization, which, when added to a proven type PWR, has the potential to reduce, by at least a factor of 10, the core melt probability. The paper describes the system components and function. Then it gives a summary of (i) the thermal/hydraulic analyses performed to verify the core cooling capability of the system, and (ii) the probabilistic studies performed for the assessment of the system potential in reducing the core melt probability. The main results of two experimental tests related to the performances of the system are then briefly described. Possible problems faced in the implementation of an SSN concept are discussed in a separate chapter. © 1993.
Original languageEnglish
Pages (from-to)25 - 54
Number of pages30
JournalNuclear Engineering and Design
Issue number1
Publication statusPublished - 2 Aug 1993
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Civil and Structural Engineering
  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality

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