Method and apparatus for a high-temperature deposition solution injector

Patent metadata

Field	Value
Publication number	US-10290381-B2
Application number	US-201113340918-A
Country	US
Kind code	B2
Filing date	Dec 30, 2011
Priority date	Dec 30, 2011
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

A method and apparatus for a deposition solution injector for a nuclear reactor that may inject an ambient temperature deposition solution into a high temperature, high pressure feed-water flow line. The method and the apparatus ensures that the deposition solution is delivered in a location within the feed-water that is beyond a boundary layer of flowing water, to prevent smearing of the solution and prevent clogging of the deposition solution within the injector. The axial cross-sectional profile of the injector, and the location of an injection slot on the injector, may reduce vortex eddy flow of the feed-water into the injector to further reduce injector blockage.

First claim

What is claimed is:

1. A method of injecting a deposition solution into a high-temperature feed-water pipe, comprising:
determining an expected boundary layer depth of fluid flowing within the feed-water pipe,
inserting an injection tube of an injector through a side of the feed-water pipe so that a longitudinal length of the injection tube is positioned to traverse the fluid flowing within the feed-water pipe, the injection tube defining an injection slot along a portion of the longitudinal length of the injection tube,
extending the injection tube into the feed-water pipe such that the injection slot extends beyond the expected depth of the boundary layer,
rotating the injection tube to locate the injection slot on a downstream side of the injection tube, relative to a direction of the fluid flowing within the feed-water pipe,
injecting, using the injector, the deposition solution into the feed-water pipe,
wherein the extending of the injection tube into the feed-water pipe includes the distal end of the injection tube being extended into the feed-water pipe, a distal-most end of the injection tube being extended into the feed-water pipe by no more than 20% greater than the expected depth of the boundary layer.

2. The method of claim 1 , wherein the inserting inserts an injection tube having an axial cross-section with an oval-shape with two tapered ends, the injection slot being located on one of the tapered ends.

3. The method of claim 1 , wherein the inserting inserts an injection tube having an axial cross-section with a circular shape.

4. The method of claim 1 , wherein the inserting inserts an injection tube having a cross-sectional area of the injection slot that is sized to cause a flow velocity of the deposition solution exiting the injection slot to be about equal to a flow velocity of the fluid flowing in the feed-water pipe.

5. The method of claim 1 , further comprising:
connecting the feed-water pipe to a nuclear reactor, the nuclear reactor being located downstream of the injector,
wherein the deposition solution is sodium hexahydroxyplatinate.

6. The method of claim 5 , wherein the injecting of the deposition solution into the feed-water pipe is accomplished via a chemical feed skid and positive displacement pumps.

7. The method of claim 1 , wherein the inserting inserts an injection tube through a side of the feed-water pipe so that the longitudinal length of the injection tube is positioned about perpendicular with the fluid flowing within the feed-water pipe.

8. The method of claim 7 , wherein the injection slot is offset from the distal end of the injection tube.

9. A method of injecting a deposition solution into a high-temperature feed-water pipe, comprising:
determining an expected boundary layer depth of fluid flowing within the feed-water pipe,
inserting an injection tube of an injector through a side of the feed-water pipe so that a longitudinal length of the injection tube is positioned to traverse the fluid flowing within the feed-water pipe, the injection tube defining an injection slot along a portion of the longitudinal length of the injection tube,
extending the injection tube into the feed-water pipe such that the injection slot extends beyond the expected depth of the boundary layer,
rotating the injection tube to locate the injection slot on a downstream side of the injection tube, relative to a direction of the fluid flowing within the feed-water pipe,
injecting, using the injector, the deposition solution into the feed-water pipe,
wherein the inserting inserts an injection tube having a cross-sectional area of the injection slot that is sized to cause a flow velocity of the deposition solution exiting the injection slot to be about equal to a flow velocity of the fluid flowing in the feed-water pipe,
wherein the extending of the injection tube into the feed-water pipe includes a distal end of the injection tube being extended into the feed-water pipe, a distal-most end of the injection tube being extended into the feed-water pipe by no more than 20% greater than the expected depth of the boundary layer.

Assignees

• Caine Thomas
• Mistreanu Adrian
• Seeman Russell Alexander
• Ge Hitachi Nuclear Energy Americas Llc

Inventors

• Caine Thomas
• Mistreanu Adrian
• Seeman Russell Alexander

Classifications

• Y10T137/0318

  Processes · CPC title

• G21C17/0225 Primary

  Chemical surface treatment, e.g. corrosion (corrosion prevention in presence of water from scale removal or by modification of the properties of the liquid C02F5/00; inhibiting corrosion by adding corrosion inhibitors C23F11/00) · CPC title

• Y10T137/87571

  Multiple inlet with single outlet · CPC title

• G21C19/28

  Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core (pumping coolant G21D) · CPC title

• G21C17/022 Primary

  for monitoring liquid coolants or moderators · CPC title