SharePoint
Aide
IRSN, Institut de radioprotection et de sûreté nucléaire

Search our site :

ok

Contact us :

ok
En Fr

Enhancing Nuclear Safety


Research

Publications

Precipitate formation contributing to sump screens clogging of a nuclear power plant during an accident


Congress title :11ème Congrès de la Société Française de Génie des Procédés
Congress town :Saint Etienne
Congress date :09/10/2007

Summary

For many years, the French "Institut de Radioprotection et de Sûreté Nucléaire" has developed studies concerning chemical effects, which can occur during a loss of coolant accident (LOCA) on a Nuclear Power Plant, due to precipitate formation leading to an increase of head loss to sump screens. This increase can cause the loss of emergency core cooling system (ECCS) and of the containment spray system (CSS), which are two safety systems which ensure the accident mitigation. These precipitates are formed by recombination of mineral species, which are released due to corrosion of immersed debris (particles of concrete, glass fibber insulation, piece of paint …). PHREEQC software has been used to identify nature and mass of precipitates that can form during a LOCA. This report presents the results of sensitivity studies carried out with PHREEQC. Chemical precipitate formation is studied as a function of several physical parameters, such as temperature, pH, nature and debris concentration. The optimal conditions in order to reduce the formation of precipitates are drawn from these calculations.

Close

Send to a friend

The information you provide in this page are single use only and will not be saved.
* Required fields

Recipient's email:*  

Sign with your name:* 

Type your email address:*   

Add a message :

Do you want to receive a copy of this email?

Send

Cancel

Close

WP_IMPRIMER_TITLE

WP_IMPRIMER_MESSAGE

Back

Ok