Emission monitoring system for a venting system of a nuclear power plant and nuclear power plant having the emission monitoring system

Patent metadata

Field	Value
Publication number	US-2016118149-A1
Application number	US-201514922330-A
Country	US
Kind code	A1
Filing date	Oct 26, 2015
Priority date	Apr 25, 2013
Publication date	Apr 28, 2016
Grant date	—

Abstract

An emission monitoring system for a venting system of a nuclear power plant is configured for low consumption of energy while having high reliability of measurement results. The emission monitoring system has a pressure relief line connected to a containment and contains a high-pressure section, a low-pressure section, and a sampling line, which, on the inlet side, opens into the low-pressure section of the pressure relief line and is guided from there to a functional path through which steam flows. An ejector containing a pump fluid connector, a suction connector and an outlet connector is provided. A pump fluid feed line has an inlet side opening into the high-pressure section of the pressure relief line and is guided from there to the ejector and connected to the pump fluid connector. A sample return line is guided from the functional path to the ejector and connected to the suction connector.

First claim

1 . An emission monitoring system for a venting system of a nuclear power plant, the emission monitoring system comprising:
a pressure relief line connected to a containment of the nuclear power plant and having a high-pressure portion and a low-pressure portion; a functional section; a sampling line having an intake mouth opening into said low-pressure portion of said pressure relief line and is lead therefrom to said functional section, through which sample stream can flow; a jet pump having a propellant fitting, a suction fitting, and an outlet fitting; a propellant supply line having an intake side opening into said high-pressure portion of said pressure relief line and is led from there to said jet pump and is connected to said propellant fitting; and a sample return line leading from said functional section to said jet pump and is connected to said suction fitting.

2 . The emission monitoring system according to claim 1 , further comprising a return line leading from said outlet fitting of said jet pump into said low-pressure portion of said pressure relief line and discharges therein on an outlet side.

3 . The emission monitoring system according to claim 2 , wherein said samle return line has an outlet mouth disposed, viewed in a flow direction of vent stream in said pressure relief line, after said intake mouth of said sampling line.

4 . The emission monitoring system according to claim 1 , further comprising a jacket pipe, at least one of said sampling line or said sample return line are led in said jacket pipe, through which a heating medium can flow.

5 . The emission monitoring system according to claim 4 , wherein said jacket pipe is provided such that a partial stream of vent stream which is branched off is active as the heating medium in said pressure relief line.

6 . The emission monitoring system according to claim 5 , wherein the heating medium is oriented in a same direction as the sample stream.

7 . The emission monitoring system according to claim 1 , wherein said functional section is disposed outside of said pressure relief line.

8 . The emission monitoring system according to claim 1 , wherein said functional section has a filter section with an aerosol filter and/or an iodine filter.

9 . The emission monitoring system according to claim 1 , wherein said functional section contains an analysis section having a number of online analyzers selected from the group consisting of an aerosol analyzer, a noble gas analyzer, and an iodine analyzer, said online analyzers are configured for capturing associated radiological activities.

10 . The emission monitoring system according to claim 1 , further comprising a throttle portion disposed between said high-pressure portion and said low-pressure portion.

11 . The emission monitoring system according to claim 10 , wherein said throttle portion is a throttle orifice.

12 . A nuclear power plant, comprising:
a venting system; and an emission monitoring system according to claim 1 and connected to said venting system.

Assignees

• Areva Gmbh

Inventors

• Hill Axel

Classifications

• G21C17/002 Primary

  Detection of leaks (by testing the coolant or the moderator G21C17/04) · CPC title

• G21C13/022

  Ventilating arrangements · CPC title

• G21C9/004

  Pressure suppression · CPC title

• G01N1/2247 Primary

  Sampling from a flowing stream of gas · CPC title

• Y02E30/00

  Energy generation of nuclear origin · CPC title