Power Range Detectors (LPRM)

LPRM Detector

Industry Pioneers

GE has more than 45 years of experience designing and manufacturing Reuter Stokes LPRM detectors. GE was the first to introduce miniature in-core fission chambers and the breeder LPRM concept. With more than 5,000 LPRM installations for nearly 75 boiling water reactors (BWRs), we have unsurpassed operating experience in all phases of BWR LPRM technology, including design, manufacture, in-reactor performance and performance surveillance.

  

Features and Benefits

Our LPRM system consists of a number of fission chambers, which operate from a range of about one to 125 percent of the rated reactor power on a linear scale. The individual LPRM assembly consists of four sensors located at predetermined elevations and a calibration tube for the traversing in-core probe (TIP). The entire assembly is enclosed in a stainless steel cover tube equipped with interface features that mate appropriately with the support plates and grid of the reactor core.

We offer two types of LPRM assemblies: the NA-250 LPRM for BWR-6s and the NA-300 LPRM for all other BWRs. Both LPRM detector types are fission chambers with a mineral insulated coaxial signal cable. The fission chamber consists of a cathode and anode assembly with high-purity argon gas in the inter-electrode gap. The cathode is coated with a mixture of U-234 and U-235 oxides. As neutron interaction depletes the U-235 atoms, U-234 is converted to U-235, so the fission chamber is a miniature "breeder," extending its life and output current.

LPRM Assemblies

  • Controlled carbon stainless steel, resistant to IASCC/IGSCC
  • Very low cobalt content stainless steel reduces activation to address ALARA concerns
  • Improved ceramic seal technology improves detector signal reliability and ensures long detector life
  • LOCA-qualified quick disconnect connectors reduce connect and disconnect times and protect the signal path
  • Reduced LPRM exchanges due to long detector lifetime, less outage impact and reduced disposal costs

Related Offerings

For More Information

Contact one of these resources:

Commercial Operations
Call: Fred Askins at:
+1 330-963-2314
Send email to: frederick.askins@ge.com

Call: William Stringer at:
+1 330-963-2292
Send email to: william.stringer@ge.com

Global Sales
Call: Warren Phelan at:
+1 330-963-2458
Send email to: warren.phelan@ge.com

Product Line Leader
Call: Dan Waltermire at:
+1 330-963-2311
Send email to: dan.waltermire@ge.com

Call: Garrick Joseph at:
+1 330-486-0545
Send email to: garrick.joseph@ge.com

For existing order and shipment status
Call: Dianah McDonald at:
+1 330-963-2465
Send email to: dianah.mcdonald@ge.com