Nuclear Control Systems
Fast Response RTD
Fast Response RTDs are designed to be
The RTDs are supplied in accordance with
installed in a specially designed precision
a Quality Assurance Program which is ISO
thermowell for the rapid detection of
9001:2000 Registered. The program is also
temperature changes in primary reactor
in compliance with 10CFR50 Appendix B,
coolant systems. Because there is no need
ANSI N45.2 and ASME NQA-1.
for a heat transfer media, installation is
Application assistance is available
quick and easy. The RTD and thermowell
for special applications and design
design are such that any Fast Response
requirements. Assistance includes physical
■ Qualified to IEEE 323-
RTD will meet response time in any
configuration requirements such as
1974 & 1983 and IEEE
precision thermowell, making them
connection head types, leadwire length,
344-1975 & 1987
completely interchangeable. Sensors have
connector and other physical details.
been environmentally and seismically
Actual installation details can affect
qualified for use in 1E applications in
measurement accuracy and response time.
Features
■ Thermowell Mounted
■ 40 Years Qualified Life
■ 0° to 750°F (-18° to 400°C)
Temperature Range
■ Standard Accuracy to
Meet IEC 60751 Class B
■ Low Calibration Drift
■ Interchangeable
■ No Heat Transfer Media
Required
■ In Situ LCSR testable
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.
Nuclear Control Systems
Fast Response RTD Specifications
Performance specifications
sensor. Standard operating current is 1 to 4
Operating temperature range
milliamps.
0°F to 750°F (-18°C to 400°C)
Self Heating
Accuracy/calibration
In 20°C water flowing transverse to the
Standard sensor accuracy follow normal
sensor sheath at 3 feet per second, with a
IEC 60751 Class B. Consult factory if Class
sheath diameter of 0.25 inch, the RTD will
A or other special accuracy requirements
be capable of dissipating 10mw/°C
are needed. Standard calibration points
without causing an indicated temperature
are 32°F, 212°F and 554°F (0°C, 100°C and
rise of more than 0.2°C.
290°C). (Other calibration points can be
Environmental/seismic qualification
performed upon customer request.) Sensor
RTDs are qualified to IEEE-323 1974 &
specific calculated calibration tables of
1983, and IEEE-344 1975 & 1987 and
Resistance vs. Temperature can be provided
NUREG 0588 for a design life of 40 years.
from 0°F to 750°F in 1°F (or 1°C) increments.
The RTD assembly will withstand up to
Drift/stability
300 Megarads T.I.D. and LOCA conditions.
Sensor drift is less than 1°F over 40 years.
Seismic capability of the RTD is 20g
Response Time
maximum acceleration in the horizontal
The response time for each sensor is 4
and vertical plane from 1 to 33 Hz.
seconds or less in a clean, dry precision
(Applicable qualification/test reports are
thermowell as verified by a plunge test in
available upon request).
accordance with ASTM E644.
General specifications
Insulation resistance
Storage
At room temperature and dry external
Storage of the RTD should be in accordance
surfaces, the insulation resistance between
with ANSI N45.2 Level B.
any terminal and the sensor case will exceed
Shipping weight
100 Megohms with 100 VDC applied.
Approximately 4 pounds with a single port
Operating current
connection head.
A continuous current of no greater than
Electrical connectors
20 milliamp (RMS) will not damage the
Available as an option.
Ultra Electronics
NUCLEAR SENSORS & PROCESS INSTRUMENTATION
707 Jeffrey Way
PO Box 300
Round Rock
TX 78680-0300, USA
Tel: +1 512 434 2800
Fax: +1 512 434 2951
e-mail: nuclear@ultra-nspi.com
www.ultra-nspi.com
www.ultra-electronics.com
Ultra Electronics reserves the
right to vary these specifications
without notice.
© Ultra Electronics Limited 2011.
Printed in England
REF: FRRTD001