Morning Report for November 21, 2005

Headquarters Daily Report

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Part 21: MODELS 763 & 763A PRESSURE TRANSMITTERS AND MODEL 764 DIFFERENTIAL PRESSURE TRANSMITTERS

Licensee/Facility: AMEREN UE CALLAWAY Dockets: License No:

Notification: MR Number: H-2005-0027 Date: 11/17/2005

Source Document: Call / Fax from Licensee

Reviewer: TABATABAI-YAZDI, OMID

Discussion:

The purpose of this morning report is to inform licensees of a potential defect with the Models 763 & 763a Pressure Transmitters and Model 764 Differential Pressure Transmitters manufatured by PRIME Measurement, formerly Barton Instrument Systems. These pressure transmitters are used to provide input to steam generator level indication and control functions.

On 11/2/05 SGT LLC, primary contractor for Steam Generator replacements at Callaway Plant, received notification from PRIME Measurement Products, (formerly ITT Barton) of a manufacturing defect in Model 763, 763A, and 764 pressure transmitters involving use of Zener diodes that were not in compliance with purchase specifications. Subsequently, on 11/3/05 SGT LLC notified AmerenUE Callaway Plant of the potential manufacturing defects involving the aforementioned transmitters.

Please see EN 42151, http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2005/20051118en.html#en42151, for details concerning this event.

Potentially affected plants are Farley, Waterford, Beaver Valley, and Callaway.

A Nuclear Industry Advisory has also been issued by PRIME Measurement on 11/2/2005 concerning this defect and is available in ADAMS with accession number ML053180299.

Accession Numbers:

Accession No	Accession Date
ML053180299	11/02/2005

Contacts:

Name	Office Abbrev	Phone No	E-Mail
TABATABAI-YAZDI, OMID	NRR	(301) 415-6616	OTY@nrc.gov