ENS 43266

v t e ENS Event
05:00 Jan 12, 2007
Title	Part 21 - Rosemount Pressure Transmitter May Not Be Seismically Qualified
Event Description	During routine operations on the RNII production floor, it was observed that an incorrect torque wrench was being used at mechanical assembly to tighten the Sensor Module Lock Nut. The incorrect tool was calibrated to a value of 12.5 ft-lb, resulting in undertorquing of the lock nut. The incorrect torque wrench was removed from service and replaced with a tool calibrated to the correct torque value of 35 ft-lb. RNII reworked all affected transmitters that had not yet shipped to the correct torque value. Assembly with the incorrect tool could result in certain pressure transmitters having a degraded environmental seal between the sensor module and the electronics housing during or after a seismic event. The five affected models have been delivered to the Byron and Comanche Peak nuclear stations.

ENS 43266 +/-
Where
Rosemount Nuclear Chanhassen, Minnesota (NRC Region 3)
Organization:	Rosemount Nuclear
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+1854.5 h77.271 days <br />11.039 weeks <br />2.54 months <br />)
Opened:	David Roberts 10:30 Mar 30, 2007
NRC Officer:	Mark Abramovitz
Last Updated:	Mar 30, 2007
43266 - NRC Website
v • d • e

v t e Emergency Notification System
Rosemount Nuclear with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2012-02-16T06:00:00 [Table view]
[ENS list for Rosemount Nuclear]

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