Information Notice 1992-03, Remote Trip Function Failures in General Electric F-Frame Molded-Case Circuit Breakers: Difference between revisions

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{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY
{{#Wiki_filter:UNITED STATES


COMMISSION
NUCLEAR REGULATORY COMMISSION


===OFFICE OF NUCLEAR REACTOR REGULATION===
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555 January 6, 1992 NRC INFORMATION


NOTICE 92-03: REMOTE TRIP FUNCTION FAILURES IN GENERAL ELECTRIC F-FRAME MOLDED-CASE
WASHINGTON, D.C. 20555 January 6, 1992 NRC INFORMATION NOTICE 92-03:   REMOTE TRIP FUNCTION FAILURES IN GENERAL


CIRCUIT BREAKERS
ELECTRIC F-FRAME MOLDED-CASE CIRCUIT
 
BREAKERS


==Addressees==
==Addressees==
All holders of operating
All holders of operating licenses or construction permits for nuclear
 
licenses or construction


permits for nuclear power reactors.
power reactors.


==Purpose==
==Purpose==
The U.S. Nuclear Regulatory
The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice
 
Commission (NRC) is issuing this information
 
notice to alert addressees
 
to a potentially
 
safety-significant
 
problem resulting
 
from the possible failure of the remote trip functions
 
of General Electric (GE)F-frame (225-ampere
 
frame size) molded-case
 
circuit breakers (MCCBs). 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 require-ments; therefore, no specific action or written response is required.Description
 
of Circumstances
 
On November 5, 1991, GE Nuclear Energy (GE NE), San Jose, California, issued an interim notification
 
of its evaluation
 
of a deviation
 
in accordance
 
with the latest revision (effective
 
October 29, 1991) of Part 21, "Reporting
 
of Defects and Noncompliance," of Title 10 of the Code of Federal Regulations
 
(10 CFR Part 21). The notification
 
described


the deviation
to alert addressees to a potentially safety-significant problem resulting from


as a "tolerance
the possible failure of the remote trip functions of General Electric (GE)
    F-frame (225-ampere frame size) molded-case circuit breakers (MCCBs). It is


buildup" in certain GE F-frame MCCBs with undervoltage
expected that recipients will review the information for applicability to their


releases (UVRs) and shunt trip devices (STs) that may inhibit these internal accessory
facilities and consider actions, as appropriate, to avoid similar problems.


remote trip devices from functioning
However, suggestions contained in this information notice are not NRC require- ments; therefore, no specific action or written response is required.


properly under conditions
==Description of Circumstances==
On November 5, 1991, GE Nuclear Energy (GE NE), San Jose, California, issued an


that produce sustained
interim notification of its evaluation of a deviation in accordance with the


high internal temperatures
latest revision (effective October 29, 1991) of Part 21, "Reporting of Defects


in the MCCBs.The attachment
and Noncompliance," of Title 10 of the Code of Federal Regulations


to the GE NE notification
(10 CFR Part 21). The notification described the deviation as a "tolerance


was taken from a draft Service Advice Letter (SAL) on this subject being prepared by the MCCB manufacturer, GE Electrical
buildup" in certain GE F-frame MCCBs with undervoltage releases (UVRs) and


Distribution
shunt trip devices (STs) that may inhibit these internal accessory remote trip


and Control (ED&C), in Plainville, Connecticut.
devices from functioning properly under conditions that produce sustained high


GE NE plans to send the 10 CFR Part 21 interim notification
internal temperatures in the MCCBs.


to all of its customers
The attachment to the GE NE notification was taken from a draft Service Advice


who have purchased
Letter (SAL) on this subject being prepared by the MCCB manufacturer, GE


F-frame MCCBs for safety-related
Electrical Distribution and Control (ED&C), in Plainville, Connecticut.


applications
GE NE plans to send the 10 CFR Part 21 interim notification to all of its


and to all GE NE Material Services field representatives.
customers who have purchased F-frame MCCBs for safety-related applications


GE ED&C plans to send the SAL (issued November 25, 1991 as SAL 91-2F) to all of its customers
and to all GE NE Material Services field representatives. GE ED&C plans to


of record, many of whom are distributors.
send the SAL (issued November 25, 1991 as SAL 91-2F) to all of its customers of


However, both the F-frame MCCBs and their accessory
record, many of whom are distributors. However, both the F-frame MCCBs and


trip devices are available
their accessory trip devices are available on the open market as commercial


on the open market as commercial
grade items through various distribution paths. Therefore, the licensees for


grade items through various distribution
some nuclear plants who use these MCCBs may not receive the GE notifications.


paths. Therefore, the licensees
cc.


for some nuclear plants who use these MCCBs may not receive the GE notifications.-e 7* '-923/ _ // 7#cc.
-e               7* '-923/
                  7#                                            _                 //


IN 92-03 January 6, 1992 Discussion
IN 92-03 January 6, 1992 Discussion


Although still evaluating
Although still evaluating the problem, the MCCB manufacturer has determined
 
the problem, the MCCB manufacturer
 
has determined
 
that assembly and operational
 
variations
 
caused the reported failures.
 
The variations
 
reportedly
 
resulted from (1) tolerances
 
in mounting the accessory trip devices in the MCCBs, (2) tolerances
 
on the adjustment
 
of the ambient compensating
 
bimetal (part of the thermal overload trip mechanism), and (3)sustained
 
high operating
 
temperatures
 
in the MCCBs. The high internal temper-ature in the MCCB required to produce a condition
 
conducive
 
to the malfunction
 
can result from continuous
 
high current load (greater than 50 percent of the overcurrent
 
trip unit rating for more than 2 hours) together with a high ambient temperature
 
in the enclosure.
 
A secondary
 
heat source could also produce the high temperatures
 
required for this malfunction.
 
GE NE stated in its interim notification
 
that UYR- and ST-equipped
 
MCCBs produced after April 1991 (date codes J116= and 1116=) incorporated


changes that would prevent this condition.
that assembly and operational variations caused the reported failures.


GE NE also stated that an MCCB may or may not exhibit this malfunction, depending
The


on the particular
variations reportedly resulted from (1) tolerances in mounting the accessory


circumstances
trip devices in the MCCBs, (2) tolerances on the adjustment of the ambient


associated
compensating bimetal (part of the thermal overload trip mechanism), and


with the assembly of the breaker and the accessory
sustained high operating temperatures in the MCCBs. The high internal (3)
ature in the MCCB required to produce a condition conducive to the         temper- malfunction


remote trip devices, in conjunction
can result from continuous high current load (greater than 50 percent


with the high temperature
overcurrent trip unit rating for more than 2 hours) together with a of the


service conditions
ambient temperature in the enclosure. A secondary heat source could high


believed to be conducive
produce the high temperatures required for this malfunction.          also


to failure. Nevertheless, GE NE maintained
GE NE stated in its interim notification that UYR- and ST-equipped


that affected MCCBs will trip under overcurrent
produced after April 1991 (date codes J116= and 1116=) incorporatedMCCBs


conditions
changes


and will trip remotely at the lower MCCB internal temperatures
that would prevent this condition. GE NE also stated that an MCCB may


usually present with lower load currents and enclosure ambient temperatures
not exhibit this malfunction, depending on the particular circumstances or may


or without secondary
associated with the assembly of the breaker and the accessory remote


heat sources.GE NE initially
devices, in conjunction with the high temperature service conditions trip


reported that it had identified
be conducive to failure. Nevertheless, GE NE maintained that affectedbelieved to


a. specific safety-related
will trip under overcurrent conditions and will trip remotely at the MCCBs


application
lower MCCB


for the affected F-frame MCCBs equipped with internal accessory remote trip devices. The identified
internal temperatures usually present with lower load currents and enclosure


application
ambient temperatures or without secondary heat sources.


is associated
GE NE initially reported that it had identified a.specific safety-related


with the multiple electrical
application for the affected F-frame MCCBs equipped with internal accessory


protection
remote trip devices. The identified application is associated with


assemblies (EPAs) used in boiling water reactor (BWR) plants to monitor power quality to the reactor protection
multiple electrical protection assemblies (EPAs) used in boiling water the


system (RPS).The EPAs trip the F-frame breakers for the RPS power supplies by means of the remote trip devices if the EPAs detect overvoltage, undervoltage, or underfre-quency conditions
(BWR) plants to monitor power quality to the reactor protection system reactor


in RPS power. In addition, GE NE informed the NRC in a subsequent
The EPAs trip the F-frame breakers for the RPS power supplies by means (RPS).


communication
remote trip devices if the EPAs detect overvoltage, undervoltage,        of the


that it may also have supplied some of the affected MCCBs as part of subassembly-level
or underfre- quency conditions in RPS power. In addition, GE NE informed the NRC


applications
in a


not separately
subsequent communication that it may also have supplied some of the affected


identified
MCCBs as part of subassembly-level applications not separately identified


in GE NE records. The affected MCCBs fitted with factory-installed
GE NE records. The affected MCCBs fitted with factory-installed remote        in


remote trip accessories
accessories may also be used in numerous other applications in all types    trip


may also be used in numerous other applications
nuclear plants in which remote tripping of an F-frame MCCB by means          of


in all types of nuclear plants in which remote tripping of an F-frame MCCB by means of the UVR or ST may be a safety-related
or ST may be a safety-related function.                              of  the  UVR


function.The presence of UVRs or STs in F-frame MCCBs should be apparent when the units are installed
The presence of UVRs or STs in F-frame MCCBs should be apparent when


in the plant. However, even if accessory
are installed in the plant. However, even if accessory designation the units


designation
are not evident, affected MCCBs can be recognized by the two UVR or markings


markings are not evident, affected MCCBs can be recognized
ST


by the two UVR or ST lead wires protruding
wires protruding through small openings in the sides of the MCCB case. lead


through small openings in the sides of the MCCB case.Additionally, UVRs set up for monitoring
Additionally, UVRs set up for monitoring 240, 480, or 600 volts-AC


240, 480, or 600 volts-AC or 250 volts-DC should have an external dropping resistor connected
or 250
volts-DC should have an external dropping resistor connected in series


in series with one of their lead wires. Attachment
with one


1 lists the breaker frame type designations
of their lead wires. Attachment 1 lists the breaker frame type designations


of
of


IN 92-03 January 6, 1992 the potentially
IN 92-03 January 6, 1992 the potentially affected MCCBs and the catalog numbers of the affected
 
affected MCCBs and the catalog numbers of the affected internal accessory
 
remote trip devices and also gives the date codes of the units believed by the manufacturer


to be affected.In view of the potentially
internal accessory remote trip devices and also gives the date codes of the


wide scope of application
units believed by the manufacturer to be affected.


of the affected MCCBs, addressees
In view of the potentially wide scope of application of the affected


may find the affected types of UVR- and ST-equipped
MCCBs, addressees may find the affected types of UVR- and ST-equipped MCCBs


MCCBs both installed
both installed and in the warehouse.
 
and in the warehouse.


==Addressees==
==Addressees==
who find any affected MCCBs may consult the manufacturer
who find any affected MCCBs


on this subject to determine
may consult the manufacturer on this subject to determine the appropriate


the appropriate
corrective action, including testing for the existence of the malfunction, analyzing the potential high temperature producing conditions, or replacing


corrective
the affected components.
 
action, including
 
testing for the existence
 
of the malfunction, analyzing
 
the potential
 
high temperature


producing
This information notice requires no specific action or written response. If


conditions, or replacing the affected components.
you have any questions about the information in this notice, please contact


This information
the technical contact listed below or the appropriate Office of Nuclear


notice requires no specific action or written response.
Reactor Regulation (NRR) project manager.


If you have any questions
I.1os    Si    Doirector


about the information
Division of Operational Events Assessment


in this notice, please contact the technical
contact listed below or the appropriate
Office of Nuclear Reactor Regulation (NRR) project manager.I.1os i S Doirector Division of Operational
===Events Assessment===
Office of Nuclear Reactor Regulation
Office of Nuclear Reactor Regulation


Technical
Technical contact:  S. D. Alexander, NRR


contact: S. D. Alexander, NRR (301) 504-2995 Attachments:
(301) 504-2995 Attachments:
1. Affected MCCBs and Accessories
1. Affected MCCBs and Accessories


2. List of Recently Issued NRC Information
2. List of Recently Issued NRC Information Notices


Notices
Attachment 1 IN 92-03 January 6, 1992 AFFECTED MCCBs and ACCESSORIES


Attachment
The affected GE F-frame ("F-225 Line") MCCBs include the breaker types or


1 IN 92-03 January 6, 1992 AFFECTED MCCBs and ACCESSORIES
frames listed below which can be fitted with any of the accessory remote trip


The affected GE F-frame ("F-225 Line") MCCBs include the breaker types or frames listed below which can be fitted with any of the accessory
devices with the listed catalog numbers:
BREAKER FRAMES                SHUNT TRIPS              UNDERVOLTAGE RELEASES


remote trip devices with the listed catalog numbers: BREAKER FRAMES SHUNT TRIPS UNDERVOLTAGE
TFK, THFK                      TFKSTA12                      TFKUVA1 TFJ                            TFKSTA13                      TFKUVA2 THLC2                          TFKSTA7                      TFKUVA4 THLB2                          TFKSTA8                      TFKUVA6 THLC4                          TFKSTA9                      TFKUVA7 TLB4                          TFKSTA11                      TFKUYA8 TFKUVA9 TFKUVA10
                                                            TFKUVA11 According to GE NE and GE ED&C, the tolerance buildup affects F-frame MCCBs and


RELEASES TFK, THFK TFKSTA12 TFKUVA1 TFJ TFKSTA13 TFKUVA2 THLC2 TFKSTA7 TFKUVA4 THLB2 TFKSTA8 TFKUVA6 THLC4 TFKSTA9 TFKUVA7 TLB4 TFKSTA11 TFKUYA8 TFKUVA9 TFKUVA10 TFKUVA11 According
UYRs and STs assembled between August 1979 and April 1991 (accessory date codes


to GE NE and GE ED&C, the tolerance
N927* through N116=). The potentially affected MCCBs could have manufacturing


buildup affects F-frame MCCBs and UYRs and STs assembled
date codes J927* through J116= (1116= for current limiting frames), but ED&C


between August 1979 and April 1991 (accessory
reported no identifiable volume of field returns for this condition among MCCBs


date codes N927* through N116=). The potentially
built before the fourth quarter of 1987 (breaker date codes J736+ and I736+).


affected MCCBs could have manufacturing
The accessory date code is its manufacturing date code and only appears on the


date codes J927* through J116= (1116= for current limiting frames), but ED&C reported no identifiable
accessory itself. However, the date code from the accessory installation


volume of field returns for this condition
facility may appear on the MCCB case in addition to the manufacturing date code


among MCCBs built before the fourth quarter of 1987 (breaker date codes J736+ and I736+).The accessory
of the MCCB.


date code is its manufacturing
Attachment 2 IN 92-03 January 6, 1992 LIST OF RECENTLY ISSUED


date code and only appears on the accessory
NRC INFORMATION NOTICES


itself. However, the date code from the accessory
Information                                    Date of


installation
Notice No.          Subject                    Issuance Issued to


facility may appear on the MCCB case in addition to the manufacturing
92-02          Relap5/Mod3 Computer Code        01/03/92 All holders of OLs or CPs


date code of the MCCB.
Error Associated with the                 for nuclear power reactors.


Attachment
Conservation of Energy


2 IN 92-03 January 6, 1992 LIST OF RECENTLY ISSUED NRC INFORMATION
Equation


NOTICES Information
92-01          Cable Damage Caused by          01/03/92 All holders of OLs or CPs


Date of Notice No. Subject Issuance Issued to 92-02 92-01 91-87 91-86 91-85 91-84 91-83 Relap5/Mod3 Computer Code Error Associated
Inadequate Cable Installa-              for nuclear power reactors.


with the Conservation
tion Procedures and Controls


of Energy Equation Cable Damage Caused by Inadequate
91-87          Hydrogen Embrittlement of       12/27/91 All holders of OLs or CPs


Cable Installa-tion Procedures
Raychem Cryofit Couplings                for nuclear power reactors.


and Controls Hydrogen Embrittlement
91-86          New Reporting Requirements      12/27/91 All licensees authorized


of Raychem Cryofit Couplings New Reporting
for Contamination Events at              to use byproduct materials


===Requirements===
Medical Facilities                        for human use.
for Contamination


===Events at Medical Facilities===
(10 CFR 30.50)
(10 CFR 30.50)Potential
91-85          Potential Failures of            12/26/91 All holders of OLs or CPs


Failures of Thermostatic
Thermostatic Control Valves              for nuclear power reactors.


Control Valves for Diesel Generator
for Diesel Generator Jacket


===Jacket Cooling Water Problems with Criticality===
Cooling Water
Alarm Components/Systems


Solenoid-Operated
91-84          Problems with Criticality        12/26/91 All Nuclear Regulatory


Valve Failures Resulted in Turbine Overspeed High-Energy
Alarm Components/Systems                  Commission (NRC) fuel


Piping Failures Caused by Wall Thinning Problems with Diaphragms
cycle licensees, interim


in Safety-Related
spent fuel storage licens- ees, and critical mass


Tanks 01/03/92 01/03/92 12/27/91 12/27/91 12/26/91 12/26/91 12/20/91 12/18/91 12/18/91 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
licensees.


authorized
91-83          Solenoid-Operated Valve          12/20/91 All holders of OLs or CPs


to use byproduct
Failures Resulted in                      for nuclear power reactors.


materials for human use.All holders of OLs or CPs for nuclear power reactors.All Nuclear Regulatory
Turbine Overspeed


Commission (NRC) fuel cycle licensees, interim spent fuel storage licens-ees, and critical mass licensees.
91-18,         High-Energy Piping Failures      12/18/91 All holders of OLs or CPs


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.91-18, Supp. 1 91-82 OL = Operating
Supp. 1        Caused by Wall Thinning                  for nuclear power reactors.


License CP = Construction
91-82          Problems with Diaphragms        12/18/91 All holders of OLs or CPs


Permit
in Safety-Related Tanks                  for nuclear power reactors.


IN 91-XX December XX, 1991 the potentially
OL = Operating License


affected MCCBs and the catalog numbers of the affected internal accessory
CP = Construction Permit


remote trip devices and also gives the date codes of the units believed by the manufacturer
IN 91-XX


to be affected.In view of the potentially
December XX, 1991 the potentially affected MCCBs and the catalog numbers of the affected internal


wider scope of the application
accessory remote trip devices and also gives the date codes of the units


of the affected MCCBs, addressees
believed by the manufacturer to be affected.


may find the affected types of UVR- and ST-equipped
In view of the potentially wider scope of the application of the affected


MCCBs both installed
MCCBs, addressees may find the affected types of UVR- and ST-equipped MCCBs


and in the warehouse.
both installed and in the warehouse.


==Addressees==
==Addressees==
who find any affected MCCBs may consult the manufacturer
who find any affected MCCBs


on this subject to determine
may consult the manufacturer on this subject to determine the appropriate


the appropriate
corrective action, including testing to confirm the existence of the malfunc- tion, analyzing the potential high temperature producing conditions, or


corrective
replacing the affected components.


action, including
No specific action or written response is required by this notice. If you


testing to confirm the existence
have any questions regarding this notice, please call the technical contact


of the malfunc-tion, analyzing
listed below, or the appropriate Office of Nuclear Reactor Regulation (NRR)
      project manager.


the potential
Charles E. Rossi, Director


high temperature
Division of Operational Events Assessment


producing
conditions, or replacing
the affected components.
No specific action or written response is required by this notice. If you have any questions
regarding
this notice, please call the technical
contact listed below, or the appropriate
Office of Nuclear Reactor Regulation (NRR)project manager.Charles E. Rossi, Director Division of Operational
===Events Assessment===
Office of Nuclear Reactor Regulation
Office of Nuclear Reactor Regulation


Technical
Technical ContiIct:   S. D. Alexander, NRR
 
Conti Attachment
 
1: Attachment
 
2: Ict: S. D. Alexander, NRR (301) 504-2995 Affected MCCBs and Accessories
 
List of Recently Issued NRC Information
 
Notices DISTRIBUTION:
 
===Central Flles SAlexander===
CBerlinger
 
===PDR CVanDenburgh===
ERossi DRIS R/F LNorrholm VIB R/F BGrimes* see previous concurrences
 
OFC :VIB/DRIS


:VIB/DRIS
(301) 504-2995 Attachment 1: Affected MCCBs and Accessories


:VIB/DRIS
Attachment 2: List of Recently Issued NRC Information Notices


:TECH ED :D:DRIS NAME :SAlexander:sda
DISTRIBUTION:
      Central Flles  PDR              DRIS R/F        VIB R/F


:CVanDenburgh
SAlexander      CVanDenburgh     LNorrholm      BGrimes


:LNorrholm
CBerlinger      ERossi


:JMain :BKGrimes DATE :12/19/91*  
* see previous concurrences
:12/4/91*
:12/19/91*
:12/4/91*
:12/19/91*
OFC :B'9C: ~8L9A :DD:DOEA: NAM CBe :CERossi: DATE :12/tO/91
:12/ /91 : : OFFICIAL RECORD COPY Document Name: GE FFRAME MCCB INFO NOTICE


IN 92-03 January 6, 1992 the potentially
OFC  :VIB/DRIS          :VIB/DRIS        :VIB/DRIS      :TECH ED      :D:DRIS


affected MCCBs and the catalog numbers of the affected internal accessory
NAME :SAlexander:sda    :CVanDenburgh    :LNorrholm      :JMain        :BKGrimes


remote trip devices and also gives the date codes of the units believed by the manufacturer
DATE :12/19/91*        :12/4/91*        :12/19/91*      :12/4/91*      :12/19/91*
OFC  :B'9C:
          ~8L9A        :DD:DOEA:
NAM    CBe              :CERossi:
DATE :12/tO/91          :12/    /91      :              :
      OFFICIAL RECORD COPY      Document Name: GE FFRAME MCCB INFO NOTICE


to be affected.In view of the potentially
IN 92-03 January 6, 1992 the potentially affected MCCBs and the catalog numbers of the affected


wide scope of application
internal accessory remote trip devices and also gives the date codes of the


of the affected MCCBs, addressees
units believed by the manufacturer to be affected.


may find the affected types of UVR- and ST-equipped
In view of the potentially wide scope of application of the affected


MCCBs both installed
MCCBs, addressees may find the affected types of UVR- and ST-equipped MCCBs


and in the warehouse.
both installed and in the warehouse.


==Addressees==
==Addressees==
who find any affected MCCBs may consult the manufacturer
who find any affected MCCBs


on this subject to determine
may consult the manufacturer on this subject to determine the appropriate


the appropriate
corrective action, including testing for the existence of the malfunction, analyzing the potential high temperature producing conditions, or replacing


corrective
the affected components.
 
action, including
 
testing for the existence
 
of the malfunction, analyzing
 
the potential
 
high temperature
 
producing


conditions, or replacing the affected components.
This information notice requires no specific action or written response. If


This information
you have any questions about the information in this notice, please contact


notice requires no specific action or written response.
the technical contact listed below or the appropriate Office of Nuclear


If you have any questions
Reactor Regulation (NRR) project manager.


about the information
original Signed by


in this notice, please contact the technical
Charles E. Rossi


contact listed below or the appropriate
Charles E. Rossi, Director


Office of Nuclear Reactor Regulation (NRR) project manager.original Signed by Charles E. Rossi Charles E. Rossi, Director Division of Operational
Division of Operational Events Assessment


===Events Assessment===
Office of Nuclear Reactor Regulation
Office of Nuclear Reactor Regulation


Technical
Technical contact:    S. D. Alexander, NRR


contact: S. D. Alexander, NRR (301) 504-2995 Attachments:
(301) 504-2995 Attachments:
1. Affected MCCBs and Accessories
      1. Affected MCCBs and Accessories


2. List of Recently Issued NRC Information
2. List of Recently Issued NRC Information Notices


Notices* see previous concurrences
* see previous concurrences


OFC :VIB/DRIS
OFC :VIB/DRIS        :YIB/DRIS        :VIB/DRIS      :TECH ED          :D:DRIS


:YIB/DRIS
NAME :SAlexander:sda  :CVanDenburgh    :LNorrholm      :JMain            :BKGrimes


:VIB/DRIS
DATE :12/19/91*        :12/4/91*        :12/19/91*      :12/4/91*          :12/19/91*
OFC  :BC:GCB:DOEA      :DD:D0EA


:TECH ED :D:DRIS NAME :SAlexander:sda
NAME :CBerlinger    :      oRJ  O    :              :                  :
DATE :12/20/91*        :12/tW91        :               :                 :
      OFFICIAL RECORD COPY      Document Name: IN 92-03


:CVanDenburgh
IN 91-XX


:LNorrholm
December XX, 1991 Pace 3 of 3 the potentially affected MCCBs and the catalog numbers of the affected internal


:JMain :BKGrimes DATE :12/19/91*
accessory remote trip devices and also gives the date codes of the units
:12/4/91*
:12/19/91*
:12/4/91*
:12/19/91*
OFC :BC:GCB:DOEA


:DD:D0EA NAME :CBerlinger
believed by the manufacturer to be affected.


: oRJ O : : : DATE :12/20/91*
In view of the potentially wider scope of the application of the affected
:12/tW91 : : : OFFICIAL RECORD COPY Document Name: IN 92-03 IN 91-XX December XX, 1991 Pace 3 of 3 the potentially


affected MCCBs and the catalog numbers of the affected internal accessory
MCCBs, addressees may find the affected types of UVR- and ST-equipped MCCBs


remote trip devices and also gives the date codes of the units believed by the manufacturer
both installed and in the warehouse.
 
to be affected.In view of the potentially
 
wider scope of the application
 
of the affected MCCBs, addressees
 
may find the affected types of UVR- and ST-equipped
 
MCCBs both installed
 
and in the warehouse.


==Addressees==
==Addressees==
who find any affected MCCBs may consult the manufacturer
who find any affected MCCBs


on this subject to determine
may consult the manufacturer on this subject to determine the appropriate


the appropriate
corrective action, including testing to confirm the existence of the malfunc- tion, analyzing the potential high temperature producing conditions, or


corrective
replacing the affected components.


action, including
No specific action or written response is required by this notice. If you


testing to confirm the existence
have any questions regarding this notice, please call the technical contact


of the malfunc-tion, analyzing
listed below, or the appropriate Office of Nuclear Reactor Regulation (NRR)
        project manager.


the potential
Charles E. Rossi, Director


high temperature
Division of Operational Events Assessment


producing
Office of Nuclear Reactor Regulation


conditions, or replacing
===Technical Contact:===


the affected components.
===S. D. Alexander, NRR===
                                          (301) vq-0995 Attachment 1:      Affected MCCBs and Accessories


No specific action or written response is required by this notice. If you have any questions
Attachment 2:      List of Recently Issued NRC Information Notices


regarding
DISTRIBUTION:
        Central Files      PDR                      DRIS R/F                    VIB R/F


this notice, please call the technical
SAlexander        CVanDenburgh            LNorrholm                    BGrimes


contact listed below, or the appropriate
CBerlinger        ERossi


Office of Nuclear Reactor Regulation (NRR)project manager.Charles E. Rossi, Director Division of Operational
* see previous concurrences


===Events Assessment===
OFC    :VIB/DRIS              VIB/DRIS              :VIB            IS          :TECH ED
Office of Nuclear Reactor Regulation


Technical
___-_--_---_-_- l-----    ---------.--- f--                        ------- -------------- --            iv-------- --------------
NAME    :5Alexander:sda: CVanDenburgh                  :LL          Wm              :JMain                        s


Contact: S. D. Alexander, NRR (301) vq-0995 Attachment
DATE    :1 2 4J9 1            :12/4/91*                :12A9/91                    :12/4/91*  :12/11 /91 CA"
OFC    :BC:.BDOEA            :DD:DOEA                :        '                          :
NAME      C erlinger          :CERossi                :                            :
                                                                                                --------------            -------------
          ---  ------        :-------1/----_        ___________:______________
DATE


1: Affected MCCBs and Accessories
DATE    :12/,vO/91            :121 /9-1               ::
          OFFICIAL RECORD COPY                Document Name: DRAFT GE INFO MCCB NOTICE


Attachment
IN 91-XX


2: List of Recently Issued NRC Information
December XX, 1991 No specific action or written response is required by this


Notices DISTRIBUTION:
notice. If you have any questions regarding this notice, please
Central Files PDR DRIS R/F VIB R/F SAlexander


CVanDenburgh
call the technical contact listed below, or the appropriate


LNorrholm
Office of Nuclear Reactor Regulation (NRR) project manager.


BGrimes CBerlinger
Charles E. Rossi, Director


ERossi* see previous concurrences
Division of Operational Events Assessment


OFC :VIB/DRIS
Office of Nuclear Reactor Regulation


VIB/DRIS :VIB IS :TECH ED___-_--_---_-_-
===Technical Contact:===
l----- ---------.---
f-- ------- --------------
-- iv- ------- --------------
NAME :5Alexander:sda:
CVanDenburgh


:L L Wm :JMain s DATE :1 2 4J9 1 :12/4/91*
===S. D. Alexander, NRR===
:12A9/91 :12/4/91*
                    (301) 492-0995 Attachment 1:   Affected MCCBs and Accessories
:12/11 /91 CA" OFC :BC:.BDOEA


:DD:DOEA : ' : NAME C erlinger :CERossi : : DATE --- ------ :-------1/----_
Attachment 2:   List of Recently Issued NRC Information Notices
___________:______________
--------------
-------------
DATE :12/,vO/91
:121 /9-1 :: OFFICIAL RECORD COPY Document Name: DRAFT GE INFO MCCB NOTICE


IN 91-XX December XX, 1991 No specific action or written response is required by this notice. If you have any questions
DISTRIBUTION:
Central Files  PDR            DRIS R/F        VIB R/F


regarding
SAlexander      CVanDenburgh    LNorrholm      BGrimes


this notice, please call the technical
===CBerlinger      ERossi===
* see previous concurrences


contact listed below, or the appropriate
OFFICE  DRIS:VIB    DRIS:VIB    DRIST B    TECH ED    0
NAME  SALEXANDER CVANDENBURGH              JIAIN


Office of Nuclear Reactor Regulation (NRR) project manager.Charles E. Rossi, Director Division of Operational
DATE  *12/  4/91  *12/  4/91  12/../91  *12/  4/91  12/;, /91
[OFFICE


===Events Assessment===
NAME
Office of Nuclear Reactor Regulation
 
Technical
 
Contact: S. D. Alexander, NRR (301) 492-0995 Attachment
 
1: Affected MCCBs and Accessories


Attachment
DOEA:GCB


2: List of Recently Issued NRC Information
CBERLINGER


Notices DISTRIBUTION:
DOEA:DD
Central Files PDR SAlexander


===CVanDenburgh===
EROSSI
CBerlinger


ERossi DRIS R/F LNorrholm VIB R/F BGrimes* see previous concurrences
DATE    12/ /91  12/  /91 OFFICIAL RECORD COPY    Document Name: GER2.IN


OFFICE DRIS:VIB DRIS:VIB DRIST B TECH ED 0 NAME SALEXANDER
IN 91-XX


CVANDENBURGH
December XX, 1991 No specific action or written response is required by this


JIAIN DATE *12/ 4/91 *12/ 4/91 12/../91 *12/ 4/91 12/;, /91[OFFICE DOEA:GCB DOEA:DD NAME CBERLINGER
notice. If you have any questions regarding this notice, please


EROSSI DATE 12/ /91 12/ /91 OFFICIAL RECORD COPY Document Name: GER2.IN
call the technical contact listed below, or the appropriate


IN 91-XX December XX, 1991 No specific action or written response is required by this notice. If you have any questions
Office of Nuclear Reactor Regulation project manager.


regarding
Charles E. Rossi, Director


this notice, please call the technical
Division of Operational Events Assessment
 
contact listed below, or the appropriate


Office of Nuclear Reactor Regulation
Office of Nuclear Reactor Regulation


project manager.Charles E. Rossi, Director Division of Operational
===Technical Contact:===


===Events Assessment===
===S. D. Alexander, NRR===
Office of Nuclear Reactor Regulation
                      (301) 492-0995 Attachment 1:    Frame Types and Date Codes of Affected MCCBs and


Technical
Catalog Numbers and Date Codes of Affected Acces- sories


Contact: S. D. Alexander, NRR (301) 492-0995 Attachment
Attachment 2:   List of Recently Issued NRC Information Notices


1: Frame Types and Date Codes of Affected MCCBs and Catalog Numbers and Date Codes of Affected Acces-sories Attachment
DISTRIBUTION:
Central Files    PDR              DRIS R/F      VIB R/F


2: List of Recently Issued NRC Information
SAlexander      CVanDenburgh    LNorrholm    BGrimes


Notices DISTRIBUTION:
===CBerlinger      ERossi===
OFFICE  DRIS:VIB    DRIS:VIB      DRIS:VIB  TECH ED    DRIS:DD


===Central Files SAlexander===
NAME    ACVAN                  GH LNORRHOLM JMAIN 9T%  BGRIMES
CBerlinger


===PDR CVanDenburgh===
DATE    12 / LJ/91    12/1 /91    12/  /91  12/ Y/91    12/  /91 OFFICE DOEA:GCB      DOEA:DD
ERossi DRIS R/F LNorrholm VIB R/F BGrimes OFFICE DRIS:VIB DRIS:VIB DRIS:VIB TECH ED DRIS:DD NAME ACVAN GH LNORRHOLM


JMAIN 9T% BGRIMES DATE 1 2/ LJ/91 12/1 /91 12/ /91 12/ Y/91 12/ /91 OFFICE DOEA:GCB DOEA:DD NAME CBERLINGER
NAME   CBERLINGER   EROSSI


EROSSI DATE 12/ /91 12/ /91}}
DATE   12/   /91   12/   /91}}


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

Latest revision as of 03:18, 24 November 2019

Remote Trip Function Failures in General Electric F-Frame Molded-Case Circuit Breakers
ML031200762
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: 01/06/1992
From: Rossi C
Office of Nuclear Reactor Regulation
To:
References
IN-92-003, NUDOCS 9112300071
Download: ML031200762 (10)
v • d • e


UNITED STATES

NUCLEAR REGULATORY COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555 January 6, 1992 NRC INFORMATION NOTICE 92-03: REMOTE TRIP FUNCTION FAILURES IN GENERAL

ELECTRIC F-FRAME MOLDED-CASE CIRCUIT

BREAKERS

Addressees

All holders of operating licenses or construction permits for nuclear

power reactors.

Purpose

The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice

to alert addressees to a potentially safety-significant problem resulting from

the possible failure of the remote trip functions of General Electric (GE)

F-frame (225-ampere frame size) molded-case circuit breakers (MCCBs). 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 require- ments; therefore, no specific action or written response is required.

Description of Circumstances

On November 5, 1991, GE Nuclear Energy (GE NE), San Jose, California, issued an

interim notification of its evaluation of a deviation in accordance with the

latest revision (effective October 29, 1991) of Part 21, "Reporting of Defects

and Noncompliance," of Title 10 of the Code of Federal Regulations

(10 CFR Part 21). The notification described the deviation as a "tolerance

buildup" in certain GE F-frame MCCBs with undervoltage releases (UVRs) and

shunt trip devices (STs) that may inhibit these internal accessory remote trip

devices from functioning properly under conditions that produce sustained high

internal temperatures in the MCCBs.

The attachment to the GE NE notification was taken from a draft Service Advice

Letter (SAL) on this subject being prepared by the MCCB manufacturer, GE

Electrical Distribution and Control (ED&C), in Plainville, Connecticut.

GE NE plans to send the 10 CFR Part 21 interim notification to all of its

customers who have purchased F-frame MCCBs for safety-related applications

and to all GE NE Material Services field representatives. GE ED&C plans to

send the SAL (issued November 25, 1991 as SAL 91-2F) to all of its customers of

record, many of whom are distributors. However, both the F-frame MCCBs and

their accessory trip devices are available on the open market as commercial

grade items through various distribution paths. Therefore, the licensees for

some nuclear plants who use these MCCBs may not receive the GE notifications.

cc.

-e 7* '-923/

7# _ //

IN 92-03 January 6, 1992 Discussion

Although still evaluating the problem, the MCCB manufacturer has determined

that assembly and operational variations caused the reported failures.

The

variations reportedly resulted from (1) tolerances in mounting the accessory

trip devices in the MCCBs, (2) tolerances on the adjustment of the ambient

compensating bimetal (part of the thermal overload trip mechanism), and

sustained high operating temperatures in the MCCBs. The high internal (3)

ature in the MCCB required to produce a condition conducive to the temper- malfunction

can result from continuous high current load (greater than 50 percent

overcurrent trip unit rating for more than 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />) together with a of the

ambient temperature in the enclosure. A secondary heat source could high

produce the high temperatures required for this malfunction. also

GE NE stated in its interim notification that UYR- and ST-equipped

produced after April 1991 (date codes J116= and 1116=) incorporatedMCCBs

changes

that would prevent this condition. GE NE also stated that an MCCB may

not exhibit this malfunction, depending on the particular circumstances or may

associated with the assembly of the breaker and the accessory remote

devices, in conjunction with the high temperature service conditions trip

be conducive to failure. Nevertheless, GE NE maintained that affectedbelieved to

will trip under overcurrent conditions and will trip remotely at the MCCBs

lower MCCB

internal temperatures usually present with lower load currents and enclosure

ambient temperatures or without secondary heat sources.

GE NE initially reported that it had identified a.specific safety-related

application for the affected F-frame MCCBs equipped with internal accessory

remote trip devices. The identified application is associated with

multiple electrical protection assemblies (EPAs) used in boiling water the

(BWR) plants to monitor power quality to the reactor protection system reactor

The EPAs trip the F-frame breakers for the RPS power supplies by means (RPS).

remote trip devices if the EPAs detect overvoltage, undervoltage, of the

or underfre- quency conditions in RPS power. In addition, GE NE informed the NRC

in a

subsequent communication that it may also have supplied some of the affected

MCCBs as part of subassembly-level applications not separately identified

GE NE records. The affected MCCBs fitted with factory-installed remote in

accessories may also be used in numerous other applications in all types trip

nuclear plants in which remote tripping of an F-frame MCCB by means of

or ST may be a safety-related function. of the UVR

The presence of UVRs or STs in F-frame MCCBs should be apparent when

are installed in the plant. However, even if accessory designation the units

are not evident, affected MCCBs can be recognized by the two UVR or markings

ST

wires protruding through small openings in the sides of the MCCB case. lead

Additionally, UVRs set up for monitoring 240, 480, or 600 volts-AC

or 250

volts-DC should have an external dropping resistor connected in series

with one

of their lead wires. Attachment 1 lists the breaker frame type designations

of

IN 92-03 January 6, 1992 the potentially affected MCCBs and the catalog numbers of the affected

internal accessory remote trip devices and also gives the date codes of the

units believed by the manufacturer to be affected.

In view of the potentially wide scope of application of the affected

MCCBs, addressees may find the affected types of UVR- and ST-equipped MCCBs

both installed and in the warehouse.

Addressees

who find any affected MCCBs

may consult the manufacturer on this subject to determine the appropriate

corrective action, including testing for the existence of the malfunction, analyzing the potential high temperature producing conditions, or replacing

the affected components.

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.

I.1os Si Doirector

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical contact: S. D. Alexander, NRR

(301) 504-2995 Attachments:

1. Affected MCCBs and Accessories

2. List of Recently Issued NRC Information Notices

Attachment 1 IN 92-03 January 6, 1992 AFFECTED MCCBs and ACCESSORIES

The affected GE F-frame ("F-225 Line") MCCBs include the breaker types or

frames listed below which can be fitted with any of the accessory remote trip

devices with the listed catalog numbers:

BREAKER FRAMES SHUNT TRIPS UNDERVOLTAGE RELEASES

TFK, THFK TFKSTA12 TFKUVA1 TFJ TFKSTA13 TFKUVA2 THLC2 TFKSTA7 TFKUVA4 THLB2 TFKSTA8 TFKUVA6 THLC4 TFKSTA9 TFKUVA7 TLB4 TFKSTA11 TFKUYA8 TFKUVA9 TFKUVA10

TFKUVA11 According to GE NE and GE ED&C, the tolerance buildup affects F-frame MCCBs and

UYRs and STs assembled between August 1979 and April 1991 (accessory date codes

N927* through N116=). The potentially affected MCCBs could have manufacturing

date codes J927* through J116= (1116= for current limiting frames), but ED&C

reported no identifiable volume of field returns for this condition among MCCBs

built before the fourth quarter of 1987 (breaker date codes J736+ and I736+).

The accessory date code is its manufacturing date code and only appears on the

accessory itself. However, the date code from the accessory installation

facility may appear on the MCCB case in addition to the manufacturing date code

of the MCCB.

Attachment 2 IN 92-03 January 6, 1992 LIST OF RECENTLY ISSUED

NRC INFORMATION NOTICES

Information Date of

Notice No. Subject Issuance Issued to

92-02 Relap5/Mod3 Computer Code 01/03/92 All holders of OLs or CPs

Error Associated with the for nuclear power reactors.

Conservation of Energy

Equation

92-01 Cable Damage Caused by 01/03/92 All holders of OLs or CPs

Inadequate Cable Installa- for nuclear power reactors.

tion Procedures and Controls

91-87 Hydrogen Embrittlement of 12/27/91 All holders of OLs or CPs

Raychem Cryofit Couplings for nuclear power reactors.

91-86 New Reporting Requirements 12/27/91 All licensees authorized

for Contamination Events at to use byproduct materials

Medical Facilities for human use.

(10 CFR 30.50)

91-85 Potential Failures of 12/26/91 All holders of OLs or CPs

Thermostatic Control Valves for nuclear power reactors.

for Diesel Generator Jacket

Cooling Water

91-84 Problems with Criticality 12/26/91 All Nuclear Regulatory

Alarm Components/Systems Commission (NRC) fuel

cycle licensees, interim

spent fuel storage licens- ees, and critical mass

licensees.

91-83 Solenoid-Operated Valve 12/20/91 All holders of OLs or CPs

Failures Resulted in for nuclear power reactors.

Turbine Overspeed

91-18, High-Energy Piping Failures 12/18/91 All holders of OLs or CPs

Supp. 1 Caused by Wall Thinning for nuclear power reactors.

91-82 Problems with Diaphragms 12/18/91 All holders of OLs or CPs

in Safety-Related Tanks for nuclear power reactors.

OL = Operating License

CP = Construction Permit

IN 91-XX

December XX, 1991 the potentially affected MCCBs and the catalog numbers of the affected internal

accessory remote trip devices and also gives the date codes of the units

believed by the manufacturer to be affected.

In view of the potentially wider scope of the application of the affected

MCCBs, addressees may find the affected types of UVR- and ST-equipped MCCBs

both installed and in the warehouse.

Addressees

who find any affected MCCBs

may consult the manufacturer on this subject to determine the appropriate

corrective action, including testing to confirm the existence of the malfunc- tion, analyzing the potential high temperature producing conditions, or

replacing the affected components.

No specific action or written response is required by this notice. If you

have any questions regarding this notice, please call the technical contact

listed below, or the appropriate Office of Nuclear Reactor Regulation (NRR)

project manager.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical ContiIct: S. D. Alexander, NRR

(301) 504-2995 Attachment 1: Affected MCCBs and Accessories

Attachment 2: List of Recently Issued NRC Information Notices

DISTRIBUTION:

Central Flles PDR DRIS R/F VIB R/F

SAlexander CVanDenburgh LNorrholm BGrimes

CBerlinger ERossi

  • see previous concurrences

OFC :VIB/DRIS :VIB/DRIS :VIB/DRIS :TECH ED :D:DRIS

NAME :SAlexander:sda :CVanDenburgh :LNorrholm :JMain :BKGrimes

DATE :12/19/91* :12/4/91* :12/19/91* :12/4/91* :12/19/91*

OFC :B'9C:

~8L9A :DD:DOEA:

NAM CBe :CERossi:

DATE :12/tO/91 :12/ /91  :  :

OFFICIAL RECORD COPY Document Name: GE FFRAME MCCB INFO NOTICE

IN 92-03 January 6, 1992 the potentially affected MCCBs and the catalog numbers of the affected

internal accessory remote trip devices and also gives the date codes of the

units believed by the manufacturer to be affected.

In view of the potentially wide scope of application of the affected

MCCBs, addressees may find the affected types of UVR- and ST-equipped MCCBs

both installed and in the warehouse.

Addressees

who find any affected MCCBs

may consult the manufacturer on this subject to determine the appropriate

corrective action, including testing for the existence of the malfunction, analyzing the potential high temperature producing conditions, or replacing

the affected components.

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.

original Signed by

Charles E. Rossi

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical contact: S. D. Alexander, NRR

(301) 504-2995 Attachments:

1. Affected MCCBs and Accessories

2. List of Recently Issued NRC Information Notices

  • see previous concurrences

OFC :VIB/DRIS :YIB/DRIS :VIB/DRIS :TECH ED :D:DRIS

NAME :SAlexander:sda :CVanDenburgh :LNorrholm :JMain :BKGrimes

DATE :12/19/91* :12/4/91* :12/19/91* :12/4/91* :12/19/91*

OFC :BC:GCB:DOEA :DD:D0EA

NAME :CBerlinger  : oRJ O  :  :  :

DATE :12/20/91* :12/tW91  :  :  :

OFFICIAL RECORD COPY Document Name: IN 92-03

IN 91-XX

December XX, 1991 Pace 3 of 3 the potentially affected MCCBs and the catalog numbers of the affected internal

accessory remote trip devices and also gives the date codes of the units

believed by the manufacturer to be affected.

In view of the potentially wider scope of the application of the affected

MCCBs, addressees may find the affected types of UVR- and ST-equipped MCCBs

both installed and in the warehouse.

Addressees

who find any affected MCCBs

may consult the manufacturer on this subject to determine the appropriate

corrective action, including testing to confirm the existence of the malfunc- tion, analyzing the potential high temperature producing conditions, or

replacing the affected components.

No specific action or written response is required by this notice. If you

have any questions regarding this notice, please call the technical contact

listed below, or the appropriate Office of Nuclear Reactor Regulation (NRR)

project manager.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical Contact:

S. D. Alexander, NRR

(301) vq-0995 Attachment 1: Affected MCCBs and Accessories

Attachment 2: List of Recently Issued NRC Information Notices

DISTRIBUTION:

Central Files PDR DRIS R/F VIB R/F

SAlexander CVanDenburgh LNorrholm BGrimes

CBerlinger ERossi

  • see previous concurrences

OFC :VIB/DRIS VIB/DRIS :VIB IS :TECH ED

___-_--_---_-_- l----- ---------.--- f-- ------- -------------- -- iv-------- --------------

NAME :5Alexander:sda: CVanDenburgh :LL Wm :JMain s

DATE :1 2 4J9 1 :12/4/91* :12A9/91 :12/4/91* :12/11 /91 CA"

OFC :BC:.BDOEA :DD:DOEA  : '  :

NAME C erlinger :CERossi  :  :

-------------

--- ------  :-------1/----_ ___________:______________

DATE

DATE :12/,vO/91 :121 /9-1  ::

OFFICIAL RECORD COPY Document Name: DRAFT GE INFO MCCB NOTICE

IN 91-XX

December XX, 1991 No specific action or written response is required by this

notice. If you have any questions regarding this notice, please

call the technical contact listed below, or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical Contact:

S. D. Alexander, NRR

(301) 492-0995 Attachment 1: Affected MCCBs and Accessories

Attachment 2: List of Recently Issued NRC Information Notices

DISTRIBUTION:

Central Files PDR DRIS R/F VIB R/F

SAlexander CVanDenburgh LNorrholm BGrimes

CBerlinger ERossi

  • see previous concurrences

OFFICE DRIS:VIB DRIS:VIB DRIST B TECH ED 0

NAME SALEXANDER CVANDENBURGH JIAIN

DATE *12/ 4/91 *12/ 4/91 12/../91 *12/ 4/91 12/;, /91

[OFFICE

NAME

DOEA:GCB

CBERLINGER

DOEA:DD

EROSSI

DATE 12/ /91 12/ /91 OFFICIAL RECORD COPY Document Name: GER2.IN

IN 91-XX

December XX, 1991 No specific action or written response is required by this

notice. If you have any questions regarding this notice, please

call the technical contact listed below, or the appropriate

Office of Nuclear Reactor Regulation project manager.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical Contact:

S. D. Alexander, NRR

(301) 492-0995 Attachment 1: Frame Types and Date Codes of Affected MCCBs and

Catalog Numbers and Date Codes of Affected Acces- sories

Attachment 2: List of Recently Issued NRC Information Notices

DISTRIBUTION:

Central Files PDR DRIS R/F VIB R/F

SAlexander CVanDenburgh LNorrholm BGrimes

CBerlinger ERossi

OFFICE DRIS:VIB DRIS:VIB DRIS:VIB TECH ED DRIS:DD

NAME ACVAN GH LNORRHOLM JMAIN 9T% BGRIMES

DATE 12 / LJ/91 12/1 /91 12/ /91 12/ Y/91 12/ /91 OFFICE DOEA:GCB DOEA:DD

NAME CBERLINGER EROSSI

DATE 12/ /91 12/ /91


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