Method for depressurizing a nuclear power plant, depressurization system for a nuclear power plant, and associated nuclear power plant

US8804896B2 · kind B2 · utility

Assignee

• AREVA GMBH · US

Inventors

• Bernd Eckardt · Bruchköbel, DE
• Norbert Losch · Offenbach, DE
• Carsten Pasler · Rodgau, DE

Key dates

• Filing date: Feb 25, 2013
• Grant date: Aug 12, 2014
• Expiry date: May 16, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E30/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method and a device depressurize a nuclear power plant. A depressurization flow is conducted out of a containment shell into the atmosphere via a depressurization line having a filter system. The filter system contains a filter chamber having an inlet, an outlet, and a sorbent filter. The depressurization flow is first conducted in a high-pressure section, then is depressurized by expansion at a throttle device, then conducted through the filter chamber having the sorbent filter, and finally blown out. To enable an effective retention of activity carriers contained in the depressurization flow, including organic compounds containing iodine, the depressurization flow depressurized by the throttle device is conducted through a superheating section before the depressurization flow enters the filter chamber, in which superheating section the depressurization flow is heated from the not yet depressurized depressurization flow to a temperature that is at least 10° C. above the dew point temperature.