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VOL XXXI, NO 196

Belzona® Stops Tank Leak At Nuclear Power Plant

 
 

Industry:

Power (POWR)

 
 

Application:

Fans, Blowers and Compressors (FBC)

 
 

Customer Location:

Northern Texas, USA

 
 

Application Date:

October 2014

 
 

Application Situation:

Pinhole Leaks and Thin Sidewall.

 
 

Problem:

Pinholes developed in the tank that is used for emergency backup water for refueling. After testing it was discovered that a large area of the 3/16" steel sidewall was only .050 thick.

 
 

Products:

Belzona 1291 (ES-Metal)

Belzona 9431 (Instant Bridging Tape)

Belzona 1111 (Super Metal)

 

Substrate:

Steel

 
 

Application Method:

The paint was removed and the surface was steel grit blasted to a 3 mil profile. Two of the pinholes were 1/2" in diameter and bolts with flat washers were coated with Belzona 1291 and placed into the holes. The third hole was 1/8" diameter and a sheet metal screw with a flat washer was coated with Belzona 1291 and placed into the hole. The first layer of Belzona 1111 was applied about 1/8" thick. Then Belzona 9431 was applied with the second coat of Belzona 1111.

 
 

Belzona Facts:

The planned refueling shutdown was able to start on time without delay, saving the plant millions.

 
 

Photographs Description

  1. Plugging active leak
  2. Patching over Belzona 1291
  3. Applying Belzona 1111 with Belzona 9431
  4. Completed application
 
Case study pic one

 

 
  Case study pic two

 

 
  Case study pic three

 

 
  Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com