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Abstract and Manuscript Management System - Abstract Detail |
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| Main Menu | Abstracts | |
| Speaker: | Peter Buzzard |
| Title: | Real World Measurement in a Nuclear Utility |
| Topic Group: | Metrology Labs and Industry |
| E-mail: | peter.buzzard@pseg.com |
| Co-Authors: | |
| Abstract: |
It’s important to remember that metrology and traceability does not stop at the calibration laboratory. It extends all the way down to the end-user of the M&TE in Non-Laboratory conditions. As an onsite corporate laboratory for a large nuclear site, PSEG has a great deal of experience with clients requesting interesting measurement help in the plant. The biggest surprise for the client is that UNCERTAINTY REALLY MATTERS in their measurement! I have found that customers everywhere need to become more aware of the uncertainty of their measurements. The difference can mean the difference between life and death. Examples of our most difficult challenges will be discussed such as: • Dimensional measurement in varying environments End users would like to measure bearings on the motor generator sets associated with reactor feed, that are about 6” in diameter, and they need to know the value to within +/-0.0001”. These measurements will be done in the field and the temperature could be between 65 and 90 degrees F. • Differential pressures in high static pressures One of the critical measurements in a nuclear plant is the validation of the emergency core cooling system. This is done using orifice plates, in line and measuring the DP. The pumps produce a rather high pressure, and the differential pressures are relatively low • Very low differential pressure In the event of an emergency, the control room (and other critical areas) must maintain positive pressure to preclude the infiltration of contamination. In order to validate the HVAC systems, the differential pressure across the wall needs to be measured with a high degree of accuracy. In one case, the measurement is 1.8”H2O +/-0.008”H2O. • Non-invasive volumetric liquid flow measurement Where there is no in-line flow measurement device, a non-invasive technique is usually employed. Ultrasonic technology provides a means to accomplish this, but it’s not unusual for the accuracy requirement to be difficult or impossible to achieve using off the shelf M&TE. |
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