The following is a summary of the information received from Rosemount Nuclear Instruments, Inc. (
RNII) via facsimile:
In August 2013, Rosemount conducted normal, transient and accident radiation testing on a sample of Model 710DU Trip Units (master and slave) to verify radiation performance of some commercial grade semiconductor components. The results indicated that post-exposure radiation performance may not meet the criteria established in their previously published Qualification Report D8200037. This affects all transmitters shipped from RNII since June 1983.
Per RNII's Model 710 Trip/Calibration System Discontinuance Letter dated September 14, 2011, RNII stopped accepting purchase orders as of December 31, 2012. At this time RNII is no longer accepting orders and no corrective actions are being taken.
These transmitters were purchased by:
Carolina Power and Light/Duke Energy, Commonwealth Edison Co., Constellation Energy Group, Inc., DTE Energy Services, Inc., Energy Northwest, Entergy Nuclear, LLC, Exelon Generation Co., LLC, Gavial, General Physics Corp., GE Nuclear Energy, Georgia Power Co./Southern Nuclear Operating Co., Harlo Corp., Knolls Atomic Power Lab, Long Island Lighting Co., Mercury Co. of Norwood, Inc., Mississippi Power & Light Co., Nebraska Public Power District, NextEra Energy/FPL Energy, Northern States Power/XCEL Energy, Inc., NuTherm International, Inc., PPL Susquehanna, LLC, Progress Energy Carolinas, LLC/Duke Energy, PSEG Nuclear, LLC, Public Service Electric & Gas, Singer Co., Tennessee Valley Authority, Texas Municipal Power Agency, United Controls and Westinghouse Electric Corporation.
Name and address of the individual providing the information:
Mr. Marc D. Bumgarner
Vice President & General Manager
Rosemount Nuclear Instruments, Inc.
8200 Market Boulevard
Chanhassen, MN 55317