Part 21 Report - 1999-130
||REGION: 1 STATE: PA
|10 CFR SECTION:
||CCCC UNSPECIFIED PARAGRAPH
10 CFR PART 21 REPORT REGARDING FAULTY RESISTANCE TEMPERATURE DETECTORS (RTD)
The following text is a portion of a facsimile received from PYCO, Inc.:
"A deviation has been detected in that a limited number of 200 OHM DUPLEX RTD assemblies have been fabricated by PYCO using THIN-FILM RTD sensors instead of the WIRE-WOUND RTD sensors specified for the assembly. RTD assemblies fabricated using wire-wound sensors have been tested and qualified by PYCO for nuclear use under our nuclear qualification test program. RTD assemblies fabricated using thin-film sensors have not been intested by PYCO to IEEE-323 and IEEE-344 requirements."
"Externally, thin-film and wire-wound RTDs have the same physical appearance, shape, and electrical characteristics. Both the wire-wound and thin-film sensors meet the requirements of the International Industrial Standard IEC-751, 'Industrial Platinum Resistance Thermometer Sensors'."
These RTDs have been sold to Carolina Power and Light and South Carolina Electric and Gas for use at the Robinson, Brunswick, and Summer plants.
(Call the NRC Operations Center for a contact telephone number.)
Page Last Reviewed/Updated Friday, April 17, 2020