Weed Model N9004. Fast Time Response RTD. Nuclear Qualified

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1 DELIVERING CRITICAL MEASUREMENTS Nuclear Qualified Weed Model N9004 Fast Time Response RTD Thermowell Mount RTD Total Interchangeability No Heat Transfer Media Required Low Calibration Drift Time Response Less than Five Seconds in Weed Thermowell in Flowing Water Nuclear Sensors & Process Instrumentation

2 Weed Model N9004 RTD Assembly This is a taper tip RTD primarily designed to be installed in a thermowell for rapid detection of temperature changes in the Hot and Cold legs of the reactor coolant loops (RCS) of PWRs (pressurized water reactors). The N9004 RTD has been successfully installed in operating nuclear plants since the early 1980 s and is widely used in many of the PWR designs. There is little drift to either calibration or time response associated with normal operating conditions. Thus, lower maintenance costs are associated with the RTD assembly. Also, due to unique design features, ALARA amounts are reduced during installation and removal, especially when a Quick Disconnect Connector (QDC) is used. Other applications are: Reactor Coolant Pumps RCS Wide Range Feedwater Systems RHR/SIS sytems Application assistance is available for special applications and design requirements. Design Configurations RTD Assembly with Connection Head and Thermowell RTD Assembly with Connection Head 2

3 Weed Model N9004 Fast Time Response RTD General Specifications QA/QC (audited by NUPIC & NAIC) Quality Program > 10 CFR 50 Append. B > ISO 9001 > 10 CFR 21 > ASME NQA 1 > ANSI N45.2 > ASME NCA 3800 Qualification IEEE /1983 IEEE /1987 Qualification Test Report # & # Physical Specifications Sheath Material Standard is stainless steel Leadwire Material Polyolefin Sheath Insulation Material MgO External Leadwire 20 ga stranded, tin plated copper Internal Leadwire Constantan Terminal Block Ceramic Shipping Weight Typical range dependent on configuration 5 lbs for RTD only Identification Tags Standard or Custom Storage In accordance with ANSI N45.2 3

4 Drawings 4

5 Weed Model N9004 Fast Time Response RTD Performance Specifications Item Maximum Operating Temperature Range Insulation Resistence Operating Current Self-Heating Error Response Time (in Weed Thermowell) Accuracy/Interchangeability Calibration Points Drift/Stability Hysteresis 0 F to 750 F (-18 C to 400 C) Specification At room temperature and dry external surfaces, the insulation resistance between any wire and the sensor case will be 100 Megohms, or greater, with 100 VDC applied. A continuous current of 20 milliamp (RMS), or less, will not damage the sensor. Standard operating current is 1 to 4 milliamps. In 154 F (68 C) water flowing transverse to the sensor sheath at 3 feet per second, with a sheath diameter of inch, the RTD will be capable of dissipating 10 mw/ C without causing an indicated temperature rise of more than 0.36 F (0.2 C). The response time for each sensor is 5 seonds or less in Weed thermowell as verified by a plunge test in accordance with ASTM E644 per 63.2% step change. Faster response times are available upon request. Standard is in accordance with IEC 60751, Class B. Class A is available upon request. Other specials, consult factory. RTD accuracy shall be within ±0.3 F (0.17 C) of the values in the resistance versus temperature interpolation table, including the effects of repeatability, but excluding hysteresis. Standard 32, 212, and 554 F ( 0,100, and 290 C). Sensor drift is less than ±0.2 F (0.11 C) shift per year up to a maximum of ±0.5 F (0.28 C) for the qualified life. Based on pre and post qualification test data. Hysteresis is the difference in the element resistance when the measurement temperature is decreasing compared to when it is increasing. Hysteresis shall not exceed 0.8 F (0.44 C) for a temperature span of 32 F to 625 F (0 C to 330 C). 5

6 N9004 RTD Model Matrix Model N9004 Thermowell Mounted Fast Time Response RTD Assembly Code S D E x Element Style Single Platinum Element, 4 wires Dual Platinum Element, 6 wires Dual Platinum Element, 8 wires Other Code Resistance at Ohms (standard) Ohms Code A B Temperature Coefficient Ohms/Ohm/ C Ohms/Ohm/ C (standard) N9004 D 2 B (Example Model Number) Nuclear Sensors & Process Instrumentation DELIVERING CRITICAL MEASUREMENTS Ultra Electronics NUCLEAR SENSORS & PROCESS INSTRUMENTATION 707 Jeffrey Way, PO Box 300 Round Rock, TX USA Tel: nuclear@ultra-nspi.com This document is not intended to serve as a design document and is subject to change. Actual specifications are per customer order. Ultra Electronics reserves the right to vary these specifications without notice. Ultra Electronics Printed in USA Pub /14