Emission monitoring system for a venting system of a nuclear power plant

Patent metadata

Field	Value
Publication number	US-10037825-B2
Application number	US-201514922330-A
Country	US
Kind code	B2
Filing date	Oct 26, 2015
Priority date	Apr 25, 2013
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

An emission monitoring system for a venting system of a nuclear power plant is configured for low consumption of energy and high reliability. 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. The sampling line opens into the low-pressure section of the pressure relief line and is guided from there to a functional path and through the sampling line steam flows. A jet pump 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 jet pump and connected to the pump fluid connector. A sample return line is guided from the functional path to the jet pump and connected to the suction connector.

First claim

The invention claimed is:

1. An emission monitoring system for a venting system of a nuclear power plant, the nuclear power plant having a containment, the emission monitoring system comprising:
a pressure relief line configured to receive emissions from the containment of the nuclear power plant and having a high-pressure portion and a low-pressure portion;
a functional section having at least one element selected from the group consisting of an online analyzer and a filter;
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 sample 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 said filter, said filter including 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 said online analyzer being one of a plurality 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

• G21C17/10

  Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain · CPC title

• G01N1/2247 Primary

  Sampling from a flowing stream of gas · CPC title

• G01N2001/242

  Injectors or ejectors · CPC title

• G21C17/044

  Detectors and metering devices for the detection of fission products · CPC title

• G21C17/028

  for monitoring gaseous coolants · CPC title