ML14170A013

Part 21 (Event 50025) - Barton Model 288A and 289A Differential Pressure Switch Defect

ML14170A013
Person / Time
Site:	Waterford
Issue date:	06/09/2014
From:	Rogers C Cameron Measurement Systems
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
50025
Download: ML14170A013 (5)

Text

406/09/2014 U.S. Nuclear Regulatory Commission Operations Center Event Report Page IPart 21 (PAR) Event# 50025Rep Org: CAMERON MEASUREMENT SYSTEMS Notification Date I Time: 04/10/2014 20:21 (EDT)Supplier:

CAMERON MEASUREMENT SYSTEMS Event Date I Time: 04/10/2014 (PDT)Last Modification:

06/09/2014 Region: 4 Docket #:City: INDUSTRY Agreement State: YesCounty: License #:State: CANRC Notified by: CHUCK ROGERS Notifications:

RAY POWELL R1DOHQ Ops Officer:

CHARLES TEAL MALCOLM WIDMANN R2DOEmergency Class: NON EMERGENCY PATTY PELKE R3DO10 CFR Section:

JAMES DRAKE R4DO21.21(d)(3)(i)

DEFECTS AND NONCOMPLIANCE PART 21 GROUP EMAILPART 21 -BARTON MODEL 288A AND 289A DIFFERENTIAL PRESSURE SWITCH DEFECTCameron Measurement Systems is reporting a defect affecting versions of the Barton Model 288A and 289Adifferential pressure indicating switches and spare switch assemblies for these products.

The defect being reportedis an out of specification concentricity issue with the roller that actuates the switches.

This represents a switchsetpoint repeatability concern.Any additional safety significant issues that might be identified in our ongoing investigation will be addressed insubsequent advisories that will be published.

If you have any questions please contact Chuck Rogers, Director ofQuality and Safety, at (281) 582-9507 or Jim Greer, Engineering

Manager, at (800) 291-3550.

• *

• UPDATE AT 1626 EDT ON 6/9/2014 FROM CHUCK ROGERS TO MARK ABRAMOVITZ

• • • The following information was excerpted from an e-mail:"Cameron has performed switch setpoint repeatability testing which has verified that rollers, even those with out oftolerance run-out, can meet the published 0.25% repeatability specification as long as the roller moves freely alongthe switch operating cam. However, if the roller were to 'skid' or 'skip' on the cam, or rotate when the roller is off thecam due to vibrations such that the roller does not return to the exact same radial position when it's on the cam atthe switch setpoint there may be a setpoint shift unless the roller has no run-out.

A change in the switch setpointcould be as much as +/-0.32% even for the current run-out specification of 0.0003 inches. As such, given thatCameron could ship product with switch repeatability verified to be 0.25% during production testing and that anadditional 0.32% could be possible due to the allowable roller run-out, a field performance of 0.57% is possible.

Given wear and other uncertainties Cameron would recommend that a user consider a conservative fieldrepeatability value for switch setpoint calculations.

06102ýLOL4 U.S. Nuclear Regulatory Commission Operations Center Event ReportPa-ee 2"An important piece of information that was gleaned from the current testing effort is that switch repeatability testing is very dependent on the sensitivity of the calibration equipment utilized.

Most calibration pressure sourcesand measurement displays have lags in the indication of the actual pressures applied that can cause errors and,even more critical, is the lag that occurs between the operator's response to the indication of the switch trip and thereading of the pressure source display.

Cameron discovered that the observation of the indicator pointer (properly calibrated) is more accurate in verification of switch repeatability than any pressure source and electrical switchcontact monitoring device we utilized.

Once the switch setpoint is established, a pencil mark at this trip point on theindicator scale can be utilized to verify subsequent trip points."In conversations with customers that called to discuss the original Advisory

concerns, Cameron became awarethat some users may believe that the Model 288A and 289A switch performance is not impacted by changes in theenvironment where they are located.

The Barton qualification for these products was a radiation augmented mildenvironment test program.

A sample of products was exposed to 3 Mrads of radiation and then subjected to a 12Gmaximum seismic simulation.

The products performed within specification for this limited testing at standardfactory environmental conditions.

In our opinion, field calibrations and switch setpoint testing should be performed at the same temperature conditions as expected when the instruments are required to perform their safetyfunctions.

Performance testing at one temperature may not necessarily ensure appropriate performance at anothertemperature.

"If you have any questions, want to place an order for a replacement instrument, switch actuation arm (with roller)or a switch and plate assembly, or want to begin the RMA process for an instrument factory repair please contactMabel Loo, Customer Service Manager, Cameron Measurement

Systems, City of Industry, CA at (800) 291-3550."

Notified the R1DO (Dental),

R2DO (Freeman),

R3DO (Daley),

R4DO (Werner),

and Part-21 Group (via e-mail).

060-'14 13:24 FROM- CAMERON INTER CORP T-024 P0001/0003 F-0244040 Capitol AvenueCity O Industry, CA 90601Tel 562.222.8440 Fax 562.222.8446 www.c-a-m.cornflo tCAMERONJune 9, 2014

SUBJECT:

Notification of Defect -Supplementary Information and ClosureCameron Measurement

Systems, at 4040 Capitol Ave in the City of Industry, CA 90601,is a supplier of basic components to the commercial nuclear power industry.

Thecomponents of concern for this advisory are Barton Model 288A and 289A Differential Pressure Indicating Switches and spare switch assemblies for these products.

On April 10, 2014 Cameron made the NRC aware that there was a potential for BartonModel 288A and 289A Indicating Switches to suffer from switch repeatability concerns.

The attached Advisory provides follow-up information and represents closure of theissue.Best Regards,Signed on behalf of Chuck Rogers by:Chuck RogersDirector, Quality & SafetyCameron Measurement Systems281-582-9507 (w)713-805-8787 (c) 06-09-'14 13:24 FROM- CAMERON INTER CORPT-024 P0002/0003 F-Y24 _C CAMERON Measurement SystemsPRODUCT ADVISORY:

DATE OF ISSUE: June 9, 2014 DOCUMENT NO. 210036966.02 ATTENTION:

If you have Barton Model 288A or 289A DP Indicating Switches or spareswitch assemblies for these products shipped from the Cameron factory please readthe following notice in its entirety.

Cameron Measurement Systems is a supplier of basic components to the commercial nuclearpower industry.

The components of concern for this Advisory are Barton Model 288A and289A Differential Pressure Indicating Switches and spare switch assemblies for theseproducts.

On April 10, 2014 Cameron made the NRC aware that there was a potential for Barton Model288A and 289A Indicating Switches to suffer from switch repeatability concerns.

Within a fewdays all of our customers for the affected safety related products were also notified of thissituation.

This Advisory provides follow-up information and represents closure of the issue.The out of specification concentricity (hereafter referred to as run-out) issue associated withthe switch actuator arm roller has been corrected by supplying replacement parts to ourcustomers where the rollers now being utilized are in conformance with the originalspecification.

Measures have been implemented to facilitate a more precise means of partinspections and the vendor making the parts has implemented process changes to eliminate the situation that caused the problem.Cameron has performed switch setpoint repeatability testing which has verified that rollers,even those with out of tolerance run-out, can meet the published 0.25% repeatability specification as long as the roller moves freely along the switch operating cam. However, ifthe roller were to "skid" or "skip" on the cam, or rotate when the roller is off the cam due tovibrations such that the roller does not return to the exact same radial position when it's on thecam at the switch setpoint there may be a setpoint shift unless the roller has no run-out.

Achange in the switch setpoint could be as much as +/-0.32% even for the current run-outspecification of 0.0003 inches. As such, given that Cameron could ship product with switchrepeatability verified to be 0.25% during production testing and that an additional 0.32% couldbe possible due to the allowable roller run-out, a field performance of 0.57% is possible.

Givenwear and other uncertainties Cameron would recommend that a user consider a conservative field repeatability value for switch setpoint calculations.

An important piece of information that was gleaned from the current testing effort is that switchrepeatability testing is very dependent on the sensitivity of the calibration equipment utilized.

Most calibration pressure sources and measurement displays have lags in the indication of theactual pressures applied that can cause errors and, even more critical, is the lag that occursbetween the operators response to the indication of the switch trip and the reading of thepressure source display.

Cameron discovered that the observation of the indicator pointer(properly calibrated) is more accurate in verification of switch repeatability than any pressuresource and electrical switch contact monitoring device we utilized.

Once the switch setpoint isestablished, a pencil mark at this trip point on the indicator scale can be utilized to verifysubsequent trip points.1 of 2 06-09-'14 13:24 FROM- CAMERON INTER CORPT-024 P0003/0003 F-024In conversations with customers that called to discuss the original Advisory

concerns, Cameron became aware that some users may believe that the Model 288A and 289A switchperformance is not impacted by changes in the environment where they are located.

TheBarton qualification for these products was a radiation augmented mild environment testprogram.

A sample of products was exposed to a 3 MRads of radiation and then subjected toa 12G maximum seismic simulation.

The products performed within specification for thislimited testing at standard factory environmental conditions.

In our opinion, field calibrations and switch setpoint testing should be performed at the same temperature conditions asexpected when the instruments are required to perform their safety functions.

Performance testing at one temperature may not necessarily ensure appropriate performance at anothertemperature.

If you have any questions, want to place an order for a replacement instrument, switchactuation arm (with roller) or a switch and plate assembly, or want to begin the RMA processfor an instrument factory repair please contact Mabel Loo, Customer Service Manager,Cameron Measurement Systems City of Industry, CA at (800) 291-3550.

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