Information Notice 1993-23, Weschler Instruments Model 252 Switchboard Meters: Difference between revisions

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{{#Wiki_filter:UNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF NUCLEAR REACTOR REGULATIONWASHINGTON, D.C. 20555March 31, 1993NRC INFORMATION NOTICE NO. 93-23: WESCHLER INSTRUMENTS MODEL 252SWITCHBOARD METERS
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY
 
COMMISSION
 
===OFFICE OF NUCLEAR REACTOR REGULATION===
WASHINGTON, D.C. 20555 March 31, 1993 NRC INFORMATION
 
NOTICE NO. 93-23: WESCHLER INSTRUMENTS
 
MODEL 252 SWITCHBOARD
 
METERS


==Addressees==
==Addressees==
All holders of operating licenses or construction permits for nuclear powerreactors. 7
All holders of operating
 
licenses or construction
 
permits for nuclear power reactors.
 
7  


==Purpose==
==Purpose==
The U.S. Nuclear Regulatory Commission (NRC) is issuing this informationnotice to alert addressees to possible problems with Weschler Instruments(Weschler) Model 252 commercial grade switchboard meters. It is expected thatrecipients will review the information for applicability to their facilitiesand consider actions, as appropriate, to avoid similar problems. However,suggestions contained in this information notice are not NRC requirements;therefore, no specific action or written response is required.
The U.S. Nuclear Regulatory
 
Commission (NRC) is issuing this information
 
notice to alert addressees
 
to possible problems with Weschler Instruments (Weschler)  
Model 252 commercial
 
grade switchboard
 
meters. It is expected that recipients
 
will review the information
 
for applicability
 
to their facilities
 
and consider actions, as appropriate, to avoid similar problems.
 
However, suggestions
 
contained
 
in this information
 
notice are not NRC requirements;
therefore, no specific action or written response is required.Description
 
of Circumstances
 
On November 9, 1992, Weschler informed the NRC of sticking meter movements
 
in some Model 252 meters manufactured
 
and supplied as commercial
 
grade items.Although Weschler reported having no evidence that meters manufactured
 
specifically
 
for safety-related
 
service are affected, Weschler was concerned that affected commercial
 
grade meters could have been dedicated
 
for use in nuclear safety-related
 
applications.
 
Discussion
 
Weschler determined
 
that some of the commercial
 
grade meters returned for repair or calibration
 
were inaccurate
 
and erratic. The vendor engineering
 
report attributed
 
this problem to sticking of the meter movement because of an off-center
 
torsion spring. Weschler determined
 
that this condition
 
resulted from a deviation
 
in the dimensions
 
associated
 
with the torsion head screws combined with several coincidental
 
factors that included (1) degradation
 
of clip-to-torsion
 
screw lubrication, (2) low initial force from the spring-retaining
 
clip or fatigue of the spring-retaining
 
clip, (3) variations
 
in the alignment
 
of the meter movement during initial assembly, and (4) the effect of the summation
 
of the dimensional
 
tolerances
 
in the assembly of the subcomponents.
 
9303240274 P P 5tC C* i\ 9I _X3 C9c
 
IN 93-23 March 31, 1993 To prevent this deficiency
 
in future products, Weschler revised its production
 
inspection
 
procedures
 
to specifically
 
require checking the dimensions
 
in question.
 
Weschler also revised its nuclear quality assurance
 
procedures
 
to.require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured
 
specifically
 
for safety-related applications.
 
Weschler could not determine
 
whether or not any Model 252 switchboard
 
meters sold as commercial
 
grade items through the various distributors
 
had been dedicated
 
for use in nuclear safety-related
 
applications.
 
Therefore, Weschler has not directly notified any licensees
 
about this problem.Weschler stated that the principal
 
corrective
 
action it has taken for affected meters returned for repair and recalibration
 
is to replace the faulty torsion head screws because they can't be repaired.
 
Upon request, Weschler will give licensees
 
information
 
about the problem and the recommended
 
corrective
 
measures.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contact: S. V. Athavale, NRR (301) 504-2974 Attachment:
List of Recently Issued NRC Information
 
Notices
 
K-I Attachment
 
IN 93-23 March 31, 1993 LIST OF RECENTLY ISSUED NRC INFORMATION
 
NOTICES Information
 
Date of Notice No. Subject Issuance Issued to 93-22 93-21 93-20 93-19 93-18 Tripping of Klockner-Moeller Molded-Case
 
Circuit Breakers due to Support Level Failure Summary of NRC Staff Observations
 
Compiled during Engineering
 
Audits or Inspections
 
of Licen-see Erosion/Corrosion
 
Programs Thermal Fatigue Cracking of Feedwater
 
===Piping to Steam Generators===
Slab Hopper Bulging Portable Moisture-Density
 
===Gauge User Responsibilities===
during Field Operations
 
Safety Systems Response to Loss of Coolant and Loss of Offsite Power Failures of Nut-Locking
 
Devices in Check Valves Failure to Verify the Continuity
 
of Shunt Trip Attachment
 
Contacts in Manual Safety Injection and Reactor Trip Switches Clarification
 
of 10 CFR 40.22, Small Quantities
 
of Source Material 03/26/93 03/25/93 03/24/93 03/17/92 03/10/93 03/08/93 02/19/93 02/18/93 02/18/93 All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for light water nuclear power reactors.All holders of OLs or CPs for PWRs supplied by Westinghouse
 
or Combustion
 
Engineering.
 
All nuclear fuel cycle licensees.
 
===All U.S. Nuclear Regulatory===
Commission
 
licensees
 
that possess moisture-density
 
gauges.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All licensees
 
who possess source material.93-17 93-16 93-15 93-14 OL = Operating
 
License CP -Construction
 
Permit
 
~'-2 IN 93-23 March 31, 1993 To prevent this deficiency
 
in future products, Weschler revised its production
 
inspection
 
procedures
 
to specifically
 
require checking the dimensions
 
in question.
 
Weschler also revised its nuclear quality assurance
 
procedures
 
to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured
 
specifically
 
for safety-related applications.
 
Weschler could not determine
 
whether or not any Model 252 switchboard
 
meters sold as commercial
 
grade items through the various distributors
 
had been dedicated
 
for use in nuclear safety-related
 
applications.
 
Therefore, Weschler has not directly notified any licensees
 
about this problem.Weschler stated that the principal
 
corrective
 
action it has taken for affected meters returned for repair and recalibration
 
is to replace the faulty torsion head screws because they can't be repaired.
 
Upon request, Weschler will give licensees
 
information
 
about the problem and the recommended
 
corrective
 
measures.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.orig /s/'d by BKGrimes Brian K. Grimes, Director Division of Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contact: S. V. Athavale, NRR (301) 504-2974 Attachment:
% L *List of Receitly Issudd NRC Information
 
Notices DOCUMENT NAME: 93-2IN*D/DRIL:NRR
 
*D/DRCH:NRR
 
*C/OGCB: DORS:NRR CERossi BABoger GHMarcus 3 03/11/93 02/11/93 03/15/93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADM
 
AJKugler SVAthavale
 
JMauck JWermiel TechEd 02/08/93 02/08/93 02/10/93 02/10/93 02/08/93 IN 93-XX March XX, 1993 To prevent this deficiency
 
in future products, Weschler revised its production
 
inspection
 
procedures
 
to specifically
 
require checking the dimensions
 
in question.
 
Weschler also revised its nuclear quality assurance
 
procedures
 
to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured
 
specifically
 
for safety-related applications.
 
Weschler could not determine
 
whether or not any Model 252 switchboard
 
meters sold as commercial
 
grade items through the various distributors
 
had been dedicated
 
for use in nuclear safety-related
 
applications.
 
Therefore, Weschler has not directly notified any licensees
 
about this problem.Weschler stated that the principal
 
corrective
 
action it has taken for affected meters returned to it for repair and recalibration
 
is to replace the faulty torsion head screws because they can't be repaired.
 
Upon request, Weschler will give licensees
 
information
 
about the problem and the recommended
 
corrective
 
measures.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
 
===Reactor Suppprt Office of Nuclear Reactor Regulation===
Technical
 
contact: S. V. Athavale (301) 504-2974 Attachment:
List of Recently Issued NRC Information
 
Notices D/DORS:NRR
 
*D/DRIL:NRR
 
*D/DRCH:NRR
 
C/OGCB:DORS:NRR
 
BKGrimes CERossi BABoger GHMarcu 03/ /93 03/11/93 02/11/93 / xi 9*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADM
 
AJKugler SVAthavale
 
JMauck JWermiel TechEd 02/08/93 02/08/93 02/10/93 02/10/93 02/08/93
-C K>~IN 93-XX March XX, 1993 To prevent this deficiency
 
in future products, Weschler revised its production
 
inspection
 
procedures
 
to specifically
 
require checking the dimensions
 
in question.
 
Weschler also revised its nuclear quality assurance
 
procedures
 
to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured
 
specifically
 
for safety-related applications.
 
Weschler could not determine
 
whether or not any Model 252 switchboard
 
meters sold as commercial
 
grade items through the various distributors
 
had been dedicated
 
for use in nuclear safety-related
 
applications.
 
Therefore, Weschler has not directly notified any licensees
 
about this problem.Weschler stated that the principal
 
corrective
 
action it has taken for affected meters returned to it for repair and recalibration
 
is to replace the faulty torsion head screws because they can't be repaired.
 
Upon request, Weschler will give licensees
 
information
 
about the problem and the recommended
 
corrective
 
measures.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contact: S. V. Athavale (301) 504-2974 Attachment:
List of Recently Issued NRC Information
 
Notices D/DORS:NRR
 
C' *D/DRCH:NRR
 
C/OGCB:DORS:NRR
 
BKGrimes BABoger GHMarcus 03/ /93 03//l/93 02/11/93 02/ /93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADM
 
MD:DRIL:NRR
 
gtt AJKugler SVAthavale
 
JMauck JWermiel TechEd RZinmerman:ld
 
02/08/93 02/08/93 02/10/93 02/10/93 02/08/93 03/S/93
'S K>IN 93-XX February XX, 1993 To prevent this deficiency
 
in future products, Weschler revised its production
 
inspection
 
procedures
 
to specifically
 
require checking the dimensions
 
in question.
 
Weschler also revised its nuclear quality assurance
 
procedures
 
to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured
 
specifically
 
for safety-related applications.
 
Weschler could not determine
 
whether or not any Model 252 switchboard
 
meters sold as commercial
 
grade items through the various distributors
 
had been dedicated
 
for use in nuclear safety-related
 
applications.
 
Therefore, Weschler has not directly notified any licensees
 
about this problem.Weschler stated that the principal
 
corrective
 
action it has taken for affected meters returned to it for repair and recalibration
 
is to replace the faulty torsion head screws because they can not be repaired.
 
Upon request, Weschler will give licensees
 
information
 
about the problem and the recommended
 
corrective
 
measures.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contact: S. V. Athavale (301) 504-2974 Attachment:
List of Recentl Issued NRC Information
 
Notices D/DORS:NRR
 
/DRIL:NRR
 
Di q C/OGCB:DORS:NRR
 
BKGrimes CERossi er +'% GHMarcus 02/ /93 02/ /93 U02/ 1/93 02/ /93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/H
 
B:DRCH:NRR*RPB:ADM
 
AJKugler SVAthavale
 
JMauck JWermiel TechEd 02/08/93 02/08/93 02/10/93 02/10/93 02/08/93C 0 "V C__ .1~o 2 k2%~-m &_ C6Q a e P. .TVA
 
-IN 93-XX--February
 
XX, 1993 To prevent this deficiency
 
in future products, Weschler has revised its production
 
inspection
 
procedures
 
to specifically
 
require checking the dimensions
 
in question.
 
In addition, Weschler has revised its nuclear quality assurance
 
procedures
 
to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured
 
specifically
 
for safety-related
 
applications.
 
Weschler could not determine
 
whether or not any Model 252 switchboard
 
meters sold as commercial
 
grade items through the various distributors
 
had been dedicated
 
for use in nuclear safety-related
 
applications.
 
Therefore, Weschler has not directly notified any licensees
 
about this problem.Weschler stated that the principal
 
corrective
 
action it has taken for affected meters returned to it for repair and recalibration
 
is to replace the faulty torsion head screws because they can not be repaired.
 
Weschler will provide information
 
about the problem and the recommended
 
corrective
 
measures to licensees
 
upon request.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contact: S. V. Athavale (301) 504-2974 Attachment:
List of Recently Issued NRC Information
 
Notices OGCB:DORS:NRR
 
AJKugler.it
 
02/ S/9?3U D/DORS:NRR
 
BKGrimes 02/ /93 HICB:DRCH:
 
===RR SVAthavale===
02/8 /93 a-.D/DRIL:NRR
 
CERossi 02/ /93&J .DRCH:NRR 02/ /9<Lif D/DRCH:NRR
 
BABoger C/H RCH:NRR JWe lel 02/10/93 C/OGCB:DORS:NRR
 
GHMarcus 02/ /93 RPB:ADM TechEd 02/ /93 IN 93-XX February XX, 1993 To prevent this deficiency
 
in future products, Weschler has revised its production
 
inspection
 
procedures
 
to specifically
 
require checking the dimensions
 
in question.
 
In addition, Weschler has revised its nuclear quality assurance
 
procedures
 
to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured
 
specifically
 
for safety-related
 
applications.
 
Weschler could not determine
 
whether or not any Model 252 switchboard
 
meters sold as commercial
 
grade items through the various distributors
 
had been dedicated
 
for use in nuclear safety-related
 
applications.
 
Therefore, Weschler has not directly notified any licensees
 
about this problem.Weschler stated that the principal
 
corrective
 
action it has taken for affected meters returned to it for repair and recalibration
 
is to replace the faulty torsion head screws because they can not be repaired.
 
Weschler will provide information
 
about the problem and the recommended
 
corrective
 
measures to licensees
 
upon request.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contact: S. V. Athavale (301) 504-2974 Attachment:
List of Recently Issued NRC Information
 
Notices D/DORS:NRR
 
D/DRIL:NRR
 
D/DRCH:NRR
 
C/OGCB:DORS:NRR


==Description of Circumstances==
BKGrimes CERossi BABoger GHMarcus 02/ /93 02/ /93 02/ /93 02/ /93 OGCB:DORS:NRR
On November 9, 1992, Weschler informed the NRC of sticking meter movements insome Model 252 meters manufactured and supplied as commercial grade items.Although Weschler reported having no evidence that meters manufacturedspecifically for safety-related service are affected, Weschler was concernedthat affected commercial grade meters could have been dedicated for use innuclear safety-related applications.DiscussionWeschler determined that some of the commercial grade meters returned forrepair or calibration were inaccurate and erratic. The vendor engineeringreport attributed this problem to sticking of the meter movement because of anoff-center torsion spring. Weschler determined that this condition resultedfrom a deviation in the dimensions associated with the torsion head screwscombined with several coincidental factors that included (1) degradation ofclip-to-torsion screw lubrication, (2) low initial force from the spring-retaining clip or fatigue of the spring-retaining clip, (3) variations in thealignment of the meter movement during initial assembly, and (4) the effect ofthe summation of the dimensional tolerances in the assembly of thesubcomponents.9303240274 P P 5tC C* i\ 9I _X3C9c


IN 93-23March 31, 1993 To prevent this deficiency in future products, Weschler revised its productioninspection procedures to specifically require checking the dimensions inquestion. Weschler also revised its nuclear quality assurance procedures to.require specific checks of torsion head screw dimensions, although the vendorhas not detected a problem with meters manufactured specifically for safety-related applications.Weschler could not determine whether or not any Model 252 switchboard meterssold as commercial grade items through the various distributors had beendedicated for use in nuclear safety-related applications. Therefore, Weschlerhas not directly notified any licensees about this problem.Weschler stated that the principal corrective action it has taken for affectedmeters returned for repair and recalibration is to replace the faulty torsionhead screws because they can't be repaired. Upon request, Weschler will givelicensees information about the problem and the recommended correctivemeasures.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: S. V. Athavale, NRR(301) 504-2974Attachment:List of Recently Issued NRC Information Notices
HICB:DRCH:NRR


K-IAttachmentIN 93-23March 31, 1993 LIST OF RECENTLY ISSUEDNRC INFORMATION NOTICESInformation Date ofNotice No. Subject Issuance Issued to93-2293-2193-2093-1993-18Tripping of Klockner-Moeller Molded-CaseCircuit Breakers due toSupport Level FailureSummary of NRC StaffObservations Compiledduring Engineering Auditsor Inspections of Licen-see Erosion/CorrosionProgramsThermal Fatigue Crackingof Feedwater Piping toSteam GeneratorsSlab Hopper BulgingPortable Moisture-DensityGauge User Responsibilitiesduring Field OperationsSafety Systems Responseto Loss of Coolant andLoss of Offsite PowerFailures of Nut-LockingDevices in Check ValvesFailure to Verify theContinuity of Shunt TripAttachment Contacts inManual Safety Injectionand Reactor Trip SwitchesClarification of10 CFR 40.22, SmallQuantities of SourceMaterial03/26/9303/25/9303/24/9303/17/9203/10/9303/08/9302/19/9302/18/9302/18/93All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor light water nuclearpower reactors.All holders of OLs or CPsfor PWRs supplied byWestinghouse or CombustionEngineering.All nuclear fuel cyclelicensees.All U.S. Nuclear RegulatoryCommission licensees thatpossess moisture-densitygauges.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All licensees who possesssource material.93-1793-1693-1593-14OL = Operating LicenseCP -Construction Permit
SC/HICB:DRCH:NRR


~'-2 IN 93-23March 31, 1993 To prevent this deficiency in future products, Weschler revised its productioninspection procedures to specifically require checking the dimensions inquestion. Weschler also revised its nuclear quality assurance procedures torequire specific checks of torsion head screw dimensions, although the vendorhas not detected a problem with meters manufactured specifically for safety-related applications.Weschler could not determine whether or not any Model 252 switchboard meterssold as commercial grade items through the various distributors had beendedicated for use in nuclear safety-related applications. Therefore, Weschlerhas not directly notified any licensees about this problem.Weschler stated that the principal corrective action it has taken for affectedmeters returned for repair and recalibration is to replace the faulty torsionhead screws because they can't be repaired. Upon request, Weschler will givelicensees information about the problem and the recommended correctivemeasures.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.orig /s/'d by BKGrimesBrian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: S. V. Athavale, NRR(301) 504-2974Attachment: % L *List of Receitly Issudd NRC Information NoticesDOCUMENT NAME: 93-2IN*D/DRIL:NRR *D/DRCH:NRR *C/OGCB: DORS:NRRCERossi BABoger GHMarcus3 03/11/93 02/11/93 03/15/93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADMAJKugler SVAthavale JMauck JWermiel TechEd02/08/93 02/08/93 02/10/93 02/10/93 02/08/93 IN 93-XXMarch XX, 1993 To prevent this deficiency in future products, Weschler revised its productioninspection procedures to specifically require checking the dimensions inquestion. Weschler also revised its nuclear quality assurance procedures torequire specific checks of torsion head screw dimensions, although the vendorhas not detected a problem with meters manufactured specifically for safety-related applications.Weschler could not determine whether or not any Model 252 switchboard meterssold as commercial grade items through the various distributors had beendedicated for use in nuclear safety-related applications. Therefore, Weschlerhas not directly notified any licensees about this problem.Weschler stated that the principal corrective action it has taken for affectedmeters returned to it for repair and recalibration is to replace the faultytorsion head screws because they can't be repaired. Upon request, Weschlerwill give licensees information about the problem and the recommendedcorrective measures.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SuppprtOffice of Nuclear Reactor RegulationTechnical contact: S. V. Athavale(301) 504-2974Attachment: List of Recently Issued NRC Information NoticesD/DORS:NRR *D/DRIL:NRR *D/DRCH:NRR C/OGCB:DORS:NRRBKGrimes CERossi BABoger GHMarcu03/ /93 03/11/93 02/11/93 / xi 9*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADMAJKugler SVAthavale JMauck JWermiel TechEd02/08/93 02/08/93 02/10/93 02/10/93 02/08/93
C/HICB:DRCH:NRR
-CK>~IN 93-XXMarch XX, 1993 To prevent this deficiency in future products, Weschler revised its productioninspection procedures to specifically require checking the dimensions inquestion. Weschler also revised its nuclear quality assurance procedures torequire specific checks of torsion head screw dimensions, although the vendorhas not detected a problem with meters manufactured specifically for safety-related applications.Weschler could not determine whether or not any Model 252 switchboard meterssold as commercial grade items through the various distributors had beendedicated for use in nuclear safety-related applications. Therefore, Weschlerhas not directly notified any licensees about this problem.Weschler stated that the principal corrective action it has taken for affectedmeters returned to it for repair and recalibration is to replace the faultytorsion head screws because they can't be repaired. Upon request, Weschlerwill give licensees information about the problem and the recommendedcorrective measures.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact:S. V. Athavale(301) 504-2974Attachment:List of Recently Issued NRC Information NoticesD/DORS:NRR C' *D/DRCH:NRR C/OGCB:DORS:NRRBKGrimes BABoger GHMarcus03/ /93 03//l/93 02/11/93 02/ /93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADM MD:DRIL:NRR gttAJKugler SVAthavale JMauck JWermiel TechEd RZinmerman:ld02/08/93 02/08/93 02/10/93 02/10/93 02/08/93 03/S/93
'SK>IN 93-XXFebruary XX, 993To prevent this deficiency in future products, Weschler revised its productioninspection procedures to specifically require checking the dimensions inquestion. Weschler also revised its nuclear quality assurance procedures torequire specific checks of torsion head screw dimensions, although the vendorhas not detected a problem with meters manufactured specifically for safety-related applications.Weschler could not determine whether or not any Model 252 switchboard meterssold as commercial grade items through the various distributors had beendedicated for use in nuclear safety-related applications. Therefore, Weschlerhas not directly notified any licensees about this problem.Weschler stated that the principal corrective action it has taken for affectedmeters returned to it for repair and recalibration is to replace the faultytorsion head screws because they can not be repaired. Upon request, Weschlerwill give licensees information about the problem and the recommendedcorrective measures.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact:S. V. Athavale(301) 504-2974Attachment: List of Recentl Issued NRC Information NoticesD/DORS:NRR /DRIL:NRR Di q C/OGCB:DORS:NRRBKGrimes CERossi er +'% GHMarcus02/ /93 02/ /93 U02/ 1/93 02/ /93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/H B:DRCH:NRR*RPB:ADMAJKugler SVAthavale JMauck JWermiel TechEd02/08/93 02/08/93 02/10/93 02/10/93 02/08/93C 0 "V C__ .1~o 2 k2%~-m &_ C6Q a e P. .TVA


-IN 93-XX--February XX, 1993 To prevent this deficiency in future products, Weschler has revised itsproduction inspection procedures to specifically require checking thedimensions in question. In addition, Weschler has revised its nuclear qualityassurance procedures to require specific checks of torsion head screwdimensions, although the vendor has not detected a problem with metersmanufactured specifically for safety-related applications.Weschler could not determine whether or not any Model 252 switchboard meterssold as commercial grade items through the various distributors had beendedicated for use in nuclear safety-related applications. Therefore, Weschlerhas not directly notified any licensees about this problem.Weschler stated that the principal corrective action it has taken for affectedmeters returned to it for repair and recalibration is to replace the faultytorsion head screws because they can not be repaired. Weschler will provideinformation about the problem and the recommended corrective measures tolicensees upon request.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact:S. V. Athavale(301) 504-2974Attachment:List of Recently Issued NRC Information NoticesOGCB:DORS:NRRAJKugler.it02/ S/9?3UD/DORS:NRRBKGrimes02/ /93HICB:DRCH: RRSVAthavale02/8 /93 a-.D/DRIL:NRRCERossi02/ /93&J .DRCH:NRR02/ /9<LifD/DRCH:NRRBABogerC/H RCH:NRRJWe lel02/10/93C/OGCB:DORS:NRRGHMarcus02/ /93RPB:ADMTechEd02/ /93 IN 93-XXFebruary XX, 1993 To prevent this deficiency in future products, Weschler has revised itsproduction inspection procedures to specifically require checking thedimensions in question. In addition, Weschler has revised its nuclear qualityassurance procedures to require specific checks of torsion head screwdimensions, although the vendor has not detected a problem with metersmanufactured specifically for safety-related applications.Weschler could not determine whether or not any Model 252 switchboard meterssold as commercial grade items through the various distributors had beendedicated for use in nuclear safety-related applications. Therefore, Weschlerhas not directly notified any licensees about this problem.Weschler stated that the principal corrective action it has taken for affectedmeters returned to it for repair and recalibration is to replace the faultytorsion head screws because they can not be repaired. Weschler will provideinformation about the problem and the recommended corrective measures tolicensees upon request.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: S. V. Athavale(301) 504-2974Attachment: List of Recently Issued NRC Information NoticesD/DORS:NRR D/DRIL:NRR D/DRCH:NRR C/OGCB:DORS:NRRBKGrimes CERossi BABoger GHMarcus02/ /93 02/ /93 02/ /93 02/ /93OGCB:DORS:NRR HICB:DRCH:NRR SC/HICB:DRCH:NRR C/HICB:DRCH:NRR RPB:ADMAJKugler SVAthavale JMauck JWermiel TechEd 1&'a;n ap02/ /93 02/ /93 02/ /93 02/ /93 02/1 /93 a
RPB:ADM AJKugler SVAthavale


}}
JMauck JWermiel TechEd 1&'a;n ap 02/ /93 02/ /93 02/ /93 02/ /93 02/1 /93 a}}


{{Information notice-Nav}}
{{Information notice-Nav}}

Revision as of 13:53, 31 August 2018

Weschler Instruments Model 252 Switchboard Meters
ML031080024
Person / Time
Site: Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant  Entergy icon.png
Issue date: 03/31/1993
From: Grimes B K
Office of Nuclear Reactor Regulation
To:
References
IN-93-023, NUDOCS 9303240274
Download: ML031080024 (23)
v • d • e


UNITED STATES NUCLEAR REGULATORY

COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555 March 31, 1993 NRC INFORMATION

NOTICE NO. 93-23: WESCHLER INSTRUMENTS

MODEL 252 SWITCHBOARD

METERS

Addressees

All holders of operating

licenses or construction

permits for nuclear power reactors.

7

Purpose

The U.S. Nuclear Regulatory

Commission (NRC) is issuing this information

notice to alert addressees

to possible problems with Weschler Instruments (Weschler)

Model 252 commercial

grade switchboard

meters. It is expected that recipients

will review the information

for applicability

to their facilities

and consider actions, as appropriate, to avoid similar problems.

However, suggestions

contained

in this information

notice are not NRC requirements;

therefore, no specific action or written response is required.Description

of Circumstances

On November 9, 1992, Weschler informed the NRC of sticking meter movements

in some Model 252 meters manufactured

and supplied as commercial

grade items.Although Weschler reported having no evidence that meters manufactured

specifically

for safety-related

service are affected, Weschler was concerned that affected commercial

grade meters could have been dedicated

for use in nuclear safety-related

applications.

Discussion

Weschler determined

that some of the commercial

grade meters returned for repair or calibration

were inaccurate

and erratic. The vendor engineering

report attributed

this problem to sticking of the meter movement because of an off-center

torsion spring. Weschler determined

that this condition

resulted from a deviation

in the dimensions

associated

with the torsion head screws combined with several coincidental

factors that included (1) degradation

of clip-to-torsion

screw lubrication, (2) low initial force from the spring-retaining

clip or fatigue of the spring-retaining

clip, (3) variations

in the alignment

of the meter movement during initial assembly, and (4) the effect of the summation

of the dimensional

tolerances

in the assembly of the subcomponents.

9303240274 P P 5tC C* i\ 9I _X3 C9c

IN 93-23 March 31, 1993 To prevent this deficiency

in future products, Weschler revised its production

inspection

procedures

to specifically

require checking the dimensions

in question.

Weschler also revised its nuclear quality assurance

procedures

to.require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured

specifically

for safety-related applications.

Weschler could not determine

whether or not any Model 252 switchboard

meters sold as commercial

grade items through the various distributors

had been dedicated

for use in nuclear safety-related

applications.

Therefore, Weschler has not directly notified any licensees

about this problem.Weschler stated that the principal

corrective

action it has taken for affected meters returned for repair and recalibration

is to replace the faulty torsion head screws because they can't be repaired.

Upon request, Weschler will give licensees

information

about the problem and the recommended

corrective

measures.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating

Reactor Support Office of Nuclear Reactor Regulation

Technical

contact: S. V. Athavale, NRR (301) 504-2974 Attachment:

List of Recently Issued NRC Information

Notices

K-I Attachment

IN 93-23 March 31, 1993 LIST OF RECENTLY ISSUED NRC INFORMATION

NOTICES Information

Date of Notice No. Subject Issuance Issued to 93-22 93-21 93-20 93-19 93-18 Tripping of Klockner-Moeller Molded-Case

Circuit Breakers due to Support Level Failure Summary of NRC Staff Observations

Compiled during Engineering

Audits or Inspections

of Licen-see Erosion/Corrosion

Programs Thermal Fatigue Cracking of Feedwater

Piping to Steam Generators

Slab Hopper Bulging Portable Moisture-Density

Gauge User Responsibilities

during Field Operations

Safety Systems Response to Loss of Coolant and Loss of Offsite Power Failures of Nut-Locking

Devices in Check Valves Failure to Verify the Continuity

of Shunt Trip Attachment

Contacts in Manual Safety Injection and Reactor Trip Switches Clarification

of 10 CFR 40.22, Small Quantities

of Source Material 03/26/93 03/25/93 03/24/93 03/17/92 03/10/93 03/08/93 02/19/93 02/18/93 02/18/93 All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for light water nuclear power reactors.All holders of OLs or CPs for PWRs supplied by Westinghouse

or Combustion

Engineering.

All nuclear fuel cycle licensees.

All U.S. Nuclear Regulatory

Commission

licensees

that possess moisture-density

gauges.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All licensees

who possess source material.93-17 93-16 93-15 93-14 OL = Operating

License CP -Construction

Permit

~'-2 IN 93-23 March 31, 1993 To prevent this deficiency

in future products, Weschler revised its production

inspection

procedures

to specifically

require checking the dimensions

in question.

Weschler also revised its nuclear quality assurance

procedures

to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured

specifically

for safety-related applications.

Weschler could not determine

whether or not any Model 252 switchboard

meters sold as commercial

grade items through the various distributors

had been dedicated

for use in nuclear safety-related

applications.

Therefore, Weschler has not directly notified any licensees

about this problem.Weschler stated that the principal

corrective

action it has taken for affected meters returned for repair and recalibration

is to replace the faulty torsion head screws because they can't be repaired.

Upon request, Weschler will give licensees

information

about the problem and the recommended

corrective

measures.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.orig /s/'d by BKGrimes Brian K. Grimes, Director Division of Operating

Reactor Support Office of Nuclear Reactor Regulation

Technical

contact: S. V. Athavale, NRR (301) 504-2974 Attachment:

% L *List of Receitly Issudd NRC Information

Notices DOCUMENT NAME: 93-2IN*D/DRIL:NRR

  • D/DRCH:NRR
  • C/OGCB: DORS:NRR CERossi BABoger GHMarcus 3 03/11/93 02/11/93 03/15/93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADM

AJKugler SVAthavale

JMauck JWermiel TechEd 02/08/93 02/08/93 02/10/93 02/10/93 02/08/93 IN 93-XX March XX, 1993 To prevent this deficiency

in future products, Weschler revised its production

inspection

procedures

to specifically

require checking the dimensions

in question.

Weschler also revised its nuclear quality assurance

procedures

to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured

specifically

for safety-related applications.

Weschler could not determine

whether or not any Model 252 switchboard

meters sold as commercial

grade items through the various distributors

had been dedicated

for use in nuclear safety-related

applications.

Therefore, Weschler has not directly notified any licensees

about this problem.Weschler stated that the principal

corrective

action it has taken for affected meters returned to it for repair and recalibration

is to replace the faulty torsion head screws because they can't be repaired.

Upon request, Weschler will give licensees

information

about the problem and the recommended

corrective

measures.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating

Reactor Suppprt Office of Nuclear Reactor Regulation

Technical

contact: S. V. Athavale (301) 504-2974 Attachment:

List of Recently Issued NRC Information

Notices D/DORS:NRR

  • D/DRIL:NRR
  • D/DRCH:NRR

C/OGCB:DORS:NRR

BKGrimes CERossi BABoger GHMarcu 03/ /93 03/11/93 02/11/93 / xi 9*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADM

AJKugler SVAthavale

JMauck JWermiel TechEd 02/08/93 02/08/93 02/10/93 02/10/93 02/08/93

-C K>~IN 93-XX March XX, 1993 To prevent this deficiency

in future products, Weschler revised its production

inspection

procedures

to specifically

require checking the dimensions

in question.

Weschler also revised its nuclear quality assurance

procedures

to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured

specifically

for safety-related applications.

Weschler could not determine

whether or not any Model 252 switchboard

meters sold as commercial

grade items through the various distributors

had been dedicated

for use in nuclear safety-related

applications.

Therefore, Weschler has not directly notified any licensees

about this problem.Weschler stated that the principal

corrective

action it has taken for affected meters returned to it for repair and recalibration

is to replace the faulty torsion head screws because they can't be repaired.

Upon request, Weschler will give licensees

information

about the problem and the recommended

corrective

measures.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating

Reactor Support Office of Nuclear Reactor Regulation

Technical

contact: S. V. Athavale (301) 504-2974 Attachment:

List of Recently Issued NRC Information

Notices D/DORS:NRR

C' *D/DRCH:NRR

C/OGCB:DORS:NRR

BKGrimes BABoger GHMarcus 03/ /93 03//l/93 02/11/93 02/ /93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/HICB:DRCH:NRR*RPB:ADM

MD:DRIL:NRR

gtt AJKugler SVAthavale

JMauck JWermiel TechEd RZinmerman:ld

02/08/93 02/08/93 02/10/93 02/10/93 02/08/93 03/S/93

'S K>IN 93-XX February XX, 1993 To prevent this deficiency

in future products, Weschler revised its production

inspection

procedures

to specifically

require checking the dimensions

in question.

Weschler also revised its nuclear quality assurance

procedures

to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured

specifically

for safety-related applications.

Weschler could not determine

whether or not any Model 252 switchboard

meters sold as commercial

grade items through the various distributors

had been dedicated

for use in nuclear safety-related

applications.

Therefore, Weschler has not directly notified any licensees

about this problem.Weschler stated that the principal

corrective

action it has taken for affected meters returned to it for repair and recalibration

is to replace the faulty torsion head screws because they can not be repaired.

Upon request, Weschler will give licensees

information

about the problem and the recommended

corrective

measures.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating

Reactor Support Office of Nuclear Reactor Regulation

Technical

contact: S. V. Athavale (301) 504-2974 Attachment:

List of Recentl Issued NRC Information

Notices D/DORS:NRR

/DRIL:NRR

Di q C/OGCB:DORS:NRR

BKGrimes CERossi er +'% GHMarcus 02/ /93 02/ /93 U02/ 1/93 02/ /93*OGCB:DORS:NRR*HICB:DRCH:NRR*SC/HICB:DRCH:NRR*C/H

B:DRCH:NRR*RPB:ADM

AJKugler SVAthavale

JMauck JWermiel TechEd 02/08/93 02/08/93 02/10/93 02/10/93 02/08/93C 0 "V C__ .1~o 2 k2%~-m &_ C6Q a e P. .TVA

-IN 93-XX--February

XX, 1993 To prevent this deficiency

in future products, Weschler has revised its production

inspection

procedures

to specifically

require checking the dimensions

in question.

In addition, Weschler has revised its nuclear quality assurance

procedures

to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured

specifically

for safety-related

applications.

Weschler could not determine

whether or not any Model 252 switchboard

meters sold as commercial

grade items through the various distributors

had been dedicated

for use in nuclear safety-related

applications.

Therefore, Weschler has not directly notified any licensees

about this problem.Weschler stated that the principal

corrective

action it has taken for affected meters returned to it for repair and recalibration

is to replace the faulty torsion head screws because they can not be repaired.

Weschler will provide information

about the problem and the recommended

corrective

measures to licensees

upon request.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating

Reactor Support Office of Nuclear Reactor Regulation

Technical

contact: S. V. Athavale (301) 504-2974 Attachment:

List of Recently Issued NRC Information

Notices OGCB:DORS:NRR

AJKugler.it

02/ S/9?3U D/DORS:NRR

BKGrimes 02/ /93 HICB:DRCH:

RR SVAthavale

02/8 /93 a-.D/DRIL:NRR

CERossi 02/ /93&J .DRCH:NRR 02/ /9<Lif D/DRCH:NRR

BABoger C/H RCH:NRR JWe lel 02/10/93 C/OGCB:DORS:NRR

GHMarcus 02/ /93 RPB:ADM TechEd 02/ /93 IN 93-XX February XX, 1993 To prevent this deficiency

in future products, Weschler has revised its production

inspection

procedures

to specifically

require checking the dimensions

in question.

In addition, Weschler has revised its nuclear quality assurance

procedures

to require specific checks of torsion head screw dimensions, although the vendor has not detected a problem with meters manufactured

specifically

for safety-related

applications.

Weschler could not determine

whether or not any Model 252 switchboard

meters sold as commercial

grade items through the various distributors

had been dedicated

for use in nuclear safety-related

applications.

Therefore, Weschler has not directly notified any licensees

about this problem.Weschler stated that the principal

corrective

action it has taken for affected meters returned to it for repair and recalibration

is to replace the faulty torsion head screws because they can not be repaired.

Weschler will provide information

about the problem and the recommended

corrective

measures to licensees

upon request.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating

Reactor Support Office of Nuclear Reactor Regulation

Technical

contact: S. V. Athavale (301) 504-2974 Attachment:

List of Recently Issued NRC Information

Notices D/DORS:NRR

D/DRIL:NRR

D/DRCH:NRR

C/OGCB:DORS:NRR

BKGrimes CERossi BABoger GHMarcus 02/ /93 02/ /93 02/ /93 02/ /93 OGCB:DORS:NRR

HICB:DRCH:NRR

SC/HICB:DRCH:NRR

C/HICB:DRCH:NRR

RPB:ADM AJKugler SVAthavale

JMauck JWermiel TechEd 1&'a;n ap 02/ /93 02/ /93 02/ /93 02/ /93 02/1 /93 a


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