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

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| issue date = 03/31/1993
| issue date = 03/31/1993
| title = Weschler Instruments Model 252 Switchboard Meters
| title = Weschler Instruments Model 252 Switchboard Meters
| author name = Grimes B K
| author name = Grimes B
| author affiliation = NRC/NRR
| author affiliation = NRC/NRR
| addressee name =  
| addressee name =  
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| document type = NRC Information Notice
| document type = NRC Information Notice
| page count = 23
| page count = 23
| revision = 0
}}
}}
{{#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==
==Description of Circumstances==
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) 504-2974
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          Tripping of Klockner-          03/26/93  All holders of OLs or CPs
 
Moeller Molded-Case                      for nuclear power reactors.
 
Circuit Breakers due to
 
Support Level Failure
 
93-21          Summary of NRC Staff          03/25/93  All holders of OLs or CPs
 
Observations Compiled                    for light water nuclear
 
during Engineering Audits                power reactors.
 
or Inspections of Licen- see Erosion/Corrosion
 
Programs
 
93-20          Thermal Fatigue Cracking      03/24/93  All holders of OLs or CPs
 
of Feedwater Piping to                    for PWRs supplied by
 
Steam Generators                          Westinghouse or Combustion
 
Engineering.
 
93-19          Slab Hopper Bulging            03/17/92  All nuclear fuel cycle
 
licensees.
 
93-18          Portable Moisture-Density      03/10/93  All U.S. Nuclear Regulatory
 
Gauge User Responsibilities              Commission licensees that
 
during Field Operations                  possess moisture-density
 
gauges.
 
93-17          Safety Systems Response        03/08/93  All holders of OLs or CPs
 
to Loss of Coolant and                    for nuclear power reactors.
 
Loss of Offsite Power
 
93-16          Failures of Nut-Locking        02/19/93  All holders of OLs or CPs
 
Devices in Check Valves                  for nuclear power reactors.
 
93-15          Failure to Verify the          02/18/93  All holders of OLs or CPs
 
Continuity of Shunt Trip                  for nuclear power reactors.
 
Attachment Contacts in
 
Manual Safety Injection
 
and Reactor Trip Switches
 
93-14          Clarification of              02/18/93  All licensees who possess
 
10 CFR 40.22, Small                      source material.
 
Quantities of Source
 
Material
 
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>~                              1 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        02/08/93 a&_ e P.. TVA
 
il C 0 "V C__ .1 ~o2 k2%~-m
 
C6Q
 
-
                                                                    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 OGCB:DORS:NRR HICB:DRCH: RR  &J    .DRCH:NRR C/H        RCH:NRR  RPB:ADM
 
AJKugler.it  SVAthavale                        JWe lel          TechEd
 
02/ S/9?3U    02/8 /93 a-.  02/ /9<            02/10/93          02/ /93 Lif
 
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


===Attachment:===
AJKugler
List of Recently Issued NRC Information Notices 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
~'-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) 504-2974


===Attachment:===
02/ /93 SVAthavale
% 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) 504-2974


===Attachment:===
02/ /93 JMauck
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
-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) 504-2974


===Attachment:===
02/ /93 JWermiel
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) 504-2974


===Attachment:===
02/ /93 TechEd 1&'a;n
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) 504-2974


===Attachment:===
02/1 /93 ap
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) 504-2974


===Attachment:===
a}}
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}}


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

Latest revision as of 04:20, 24 November 2019

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
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 Tripping of Klockner- 03/26/93 All holders of OLs or CPs

Moeller Molded-Case for nuclear power reactors.

Circuit Breakers due to

Support Level Failure

93-21 Summary of NRC Staff 03/25/93 All holders of OLs or CPs

Observations Compiled for light water nuclear

during Engineering Audits power reactors.

or Inspections of Licen- see Erosion/Corrosion

Programs

93-20 Thermal Fatigue Cracking 03/24/93 All holders of OLs or CPs

of Feedwater Piping to for PWRs supplied by

Steam Generators Westinghouse or Combustion

Engineering.

93-19 Slab Hopper Bulging 03/17/92 All nuclear fuel cycle

licensees.

93-18 Portable Moisture-Density 03/10/93 All U.S. Nuclear Regulatory

Gauge User Responsibilities Commission licensees that

during Field Operations possess moisture-density

gauges.

93-17 Safety Systems Response 03/08/93 All holders of OLs or CPs

to Loss of Coolant and for nuclear power reactors.

Loss of Offsite Power

93-16 Failures of Nut-Locking 02/19/93 All holders of OLs or CPs

Devices in Check Valves for nuclear power reactors.

93-15 Failure to Verify the 02/18/93 All holders of OLs or CPs

Continuity of Shunt Trip for nuclear power reactors.

Attachment Contacts in

Manual Safety Injection

and Reactor Trip Switches

93-14 Clarification of 02/18/93 All licensees who possess

10 CFR 40.22, Small source material.

Quantities of Source

Material

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>~ 1 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 02/08/93 a&_ e P.. TVA

il C 0 "V C__ .1 ~o2 k2%~-m

C6Q

-

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 OGCB:DORS:NRR HICB:DRCH: RR &J .DRCH:NRR C/H RCH:NRR RPB:ADM

AJKugler.it SVAthavale JWe lel TechEd

02/ S/9?3U 02/8 /93 a-. 02/ /9< 02/10/93 02/ /93 Lif

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

02/ /93 SVAthavale

02/ /93 JMauck

02/ /93 JWermiel

02/ /93 TechEd 1&'a;n

02/1 /93 ap

a


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