Nuclear Control Systems - Fast Time Response Sensors

Fast Response RTDs are designed to be installed in a specially designed precision thermowell for the rapid detection of temperature changes in primary reactor coolant systems. Because there is no need for a heat transfer media, installation is quick and easy. The RTD and thermowell design are such that any Fast Response RTD will meet response time in any precision thermowell, making them completely interchangeable. Sensors have been environmentally and seismically qualified for use in 1E applications in nuclear power generating stations.

The material selection and configuration of this unique sensor ensures longer installed life at elevated temperatures providing lower cost of ownership.

The RTDs are supplied in accordance with a Quality Assurance Program which is ISO 9001:2000 Registered. The program is also in compliance with 10CFR50 Appendix B, ANSI N45.2 and ASME NQA-1.

Application assistance is available for special applications and design requirements. Assistance includes physical configuration requirements such as connection head types, leadwire length, connector, and other physical details. Actual installation details can affect measurement accuracy and response time.

Specification
Documentation

Specification

Performance Specifications

Operating Temperature Range

0°F to 750°F (-18°C to 400°C)

Accuracy/Calibration

Standard sensor accuracy follow normal IEC 60751 Class B. Consult factory if Class A or other special accuracy requirements are needed. Standard calibration points are 32°F, 212°F and 554°F (0°C, 100°C and 290°C). (Other calibration points can be performed upon customer request.) Sensor specific calculated calibration tables of Resistance vs. Temperature can be provided from 0°F to 750°F in 1°F (or 1°C) increments. When using these calibration table values accuracy is within ±0.3°F.

Drift/Stability

Sensor drift is less than 1°F over 40 years

Response Time

The response time for each sensor is 4 seconds or less in a clean, dry precision thermowell as verified by a plunge test in accordance with ASTM E644.

Insulation Resistance

At room temperature and dry external surfaces, the insulation resistance between any terminal and the sensor case will exceed 100 Megohms with 100 VDC applied

Operating Current

A continuous current of no greater than 20 milliamp (RMS) will not damage the sensor. Standard operating current is 1 to 4 milliamps

Self Heating

In 20°C water flowing transverse to the sensor sheath at 3 feet per second, with a sheath diameter of 0.25 inch, the RTD will be capable of dissipating 10mw/°C without causing an indicated temperature rise of more than 0.2°C.

Environmental/Seismic Qualification

(Applicable Qualification/Test reports are available upon request)

RTDs are qualified to IEEE-323 1974 & 1983, and IEEE-344 1975 & 1987 and NUREG 0588 for a design life of 40 years. The RTD assembly will withstand 300 Megarads T.I.D. and LOCA conditions. Seismic capability of the RTD is 20g maximum acceleration in the horizontal and vertical plane from 1 to 33 Hz.

Documentation

Please use the links below to view the available documentation.

Product Sheets

Fast Response RTD

Thermowell Mounted
40 Years Qualified Life
0° to 750°F (-18° to 400°C) Temperature Range
Standard Accuracy to Meet IEC 60751 Class B
Qualified to IEEE 323-1974 & 1983 and IEEE 344-1975 & 1987
Low Calibration Drift
Interchangeable
No Heat Transfer Media Required
In Situ LCSR testable

Performance Specifications

Operating Temperature Range	0°F to 750°F (-18°C to 400°C)
Accuracy/Calibration	Standard sensor accuracy follow normal IEC 60751 Class B. Consult factory if Class A or other special accuracy requirements are needed. Standard calibration points are 32°F, 212°F and 554°F (0°C, 100°C and 290°C). (Other calibration points can be performed upon customer request.) Sensor specific calculated calibration tables of Resistance vs. Temperature can be provided from 0°F to 750°F in 1°F (or 1°C) increments. When using these calibration table values accuracy is within ±0.3°F.
Drift/Stability	Sensor drift is less than 1°F over 40 years
Response Time	The response time for each sensor is 4 seconds or less in a clean, dry precision thermowell as verified by a plunge test in accordance with ASTM E644.
Insulation Resistance	At room temperature and dry external surfaces, the insulation resistance between any terminal and the sensor case will exceed 100 Megohms with 100 VDC applied
Operating Current	A continuous current of no greater than 20 milliamp (RMS) will not damage the sensor. Standard operating current is 1 to 4 milliamps
Self Heating	In 20°C water flowing transverse to the sensor sheath at 3 feet per second, with a sheath diameter of 0.25 inch, the RTD will be capable of dissipating 10mw/°C without causing an indicated temperature rise of more than 0.2°C.
Environmental/Seismic Qualification (Applicable Qualification/Test reports are available upon request)	RTDs are qualified to IEEE-323 1974 & 1983, and IEEE-344 1975 & 1987 and NUREG 0588 for a design life of 40 years. The RTD assembly will withstand 300 Megarads T.I.D. and LOCA conditions. Seismic capability of the RTD is 20g maximum acceleration in the horizontal and vertical plane from 1 to 33 Hz.