Information Notice 1995-08, Inaccurate Data Obtained with Clamp-On Ultrasonic Flow Measurement Instruments: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(Created page by program invented by StriderTol)
 
(One intermediate revision by the same user not shown)
Line 3: Line 3:
| issue date = 01/30/1995
| issue date = 01/30/1995
| title = Inaccurate Data Obtained with Clamp-On Ultrasonic Flow Measurement Instruments
| title = Inaccurate Data Obtained with Clamp-On Ultrasonic Flow Measurement Instruments
| author name = Grimes B K
| author name = Grimes B
| author affiliation = NRC/NRR
| author affiliation = NRC/NRR
| addressee name =  
| addressee name =  
Line 14: Line 14:
| page count = 12
| page count = 12
}}
}}
{{#Wiki_filter:X '..UNITED STATES NUCLEAR REGULATORY
{{#Wiki_filter:X '..


COMMISSION
UNITED STATES


===OFFICE OF NUCLEAR REACTOR REGULATION===
NUCLEAR REGULATORY COMMISSION
WASHINGTON, D.C. 20555 January 30, 1995 NRC INFORMATION


NOTICE 95-08: INACCURATE
OFFICE OF NUCLEAR REACTOR REGULATION


DATA OBTAINED WITH CLAMP-ON ULTRASONIC
WASHINGTON, D.C. 20555 January 30, 1995 NRC INFORMATION NOTICE 95-08:    INACCURATE DATA OBTAINED WITH CLAMP-ON


FLOW MEASUREMENT
ULTRASONIC FLOW MEASUREMENT INSTRUMENTS
 
INSTRUMENTS


==Addressees==
==Addressees==
All holders of operating
All holders of operating licenses or construction permits for nuclear power
 
licenses or construction
 
permits for nuclear power reactors.PurDose The U.S. Nuclear Regulatory
 
Commission (NRC) is issuing this information
 
notice to alert addressees
 
to difficulties
 
in accurately
 
measuring
 
flow rates with clamp-on ultrasonic
 
flow measurement
 
instruments.
 
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.DescriDtion
 
of Circumstances
 
O October 14, 1993, while performing
 
a high head safety injection (HHSI) flow balance test, the licensee for North Anna Unit 2 determined
 
that the as-found safety injection
 
cold leg branch line flow rates did not meet the technical specification
 
requirements.
 
The as-found cold leg branch line flow rates had also failed to meet the technical
 
specification
 
requirements
 
during the previous test in April 1992.The North Anna Technical
 
Specifications
 
give limits related to both minimum and maximum safety injection
 
line flow rates. For North Anna, these two technical
 
specification
 
limits resulted in an very narrow allowed operating band, which required the use of highly accurate flow measurement
 
instruments
 
for flow tests.The licensee performed
 
the flow balance using System 990 Uniflow Universal Transit-Time
 
Flowmeters
 
manufactured
 
by Controlotron
 
of Hauppauge, New York.The Uniflow flowmeter
 
is a clamp-on non-intrusive
 
portable flowmeter
 
that uses multi-pulse, transit-time
 
ultrasonic
 
technology
 
to measure precisely
 
the flow rate. The flowmeter
 
induces alternate
 
upstream and downstream
 
ultrasonic
 
signals and measures the difference
 
in transit times. This information
 
is then used to determine
 
the axial fluid velocity and the flow rate through the pipe. Inaccuracies


associated
reactors.


with the use of these instruments
PurDose


at North Anna combined with the narrow band of allowable
The U.S. Nuclear Regulatory Commission (NRC) is issuing this information


flows caused problems which contributed
notice to alert addressees to difficulties in accurately measuring flow rates


to the failure to meet technical
with clamp-on ultrasonic flow measurement instruments. It is expected that


specification
recipients will review the information for applicability to their facilities


requirements.
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.


P4 R I r p.# sCC 's 9501240226 UtjxW ¢ vv -31-15 lk 0 (t
DescriDtion of Circumstances


v-' IN 95-08 January 30, 1995 Discussion
O October 14, 1993, while performing a high head safety injection (HHSI) flow


The licensee examined the 1993 North Anna Unit 2 flow balance test data and observed that some of the data indicated
balance test, the licensee for North Anna Unit 2 determined that the as-found


that the instrument
safety injection cold leg branch line flow rates did not meet the technical


errors significantly
specification requirements. The as-found cold leg branch line flow rates had


exceeded accuracies
also failed to meet the technical specification requirements during the


assumed for the tests. Numerous factors may affect the accuracy of this flowmeter
previous test in April 1992.


including
The North Anna Technical Specifications give limits related to both minimum


pipe dimensions, fluid flow effects, transducer
and maximum safety injection line flow rates. For North Anna, these two


mounting, and instrument
technical specification limits resulted in an very narrow allowed operating


setup and operation.
band, which required the use of highly accurate flow measurement instruments


After the test, the licensee investigated
for flow tests.


and concluded
The licensee performed the flow balance using System 990 Uniflow Universal


that the instrument
Transit-Time Flowmeters manufactured by Controlotron of Hauppauge, New York.


inaccuracy
The Uniflow flowmeter is a clamp-on non-intrusive portable flowmeter that uses


most likely was caused by flow effects associated
multi-pulse, transit-time ultrasonic technology to measure precisely the flow


with the piping configuration.
rate. The flowmeter induces alternate upstream and downstream ultrasonic


The piping arrangement, which contained
signals and measures the difference in transit times. This information isthe


several out-of-plane
then used to determine the axial fluid velocity and the flow rate through


bends that forced the flow to change direction
pipe. Inaccuracies associated with the use of these instruments at North Anna


numerous times before entering the straight section of pipe containing
combined with the narrow band of allowable flows caused problems which


the ultrasonic
contributed to the failure to meet technical specification requirements.


transducers, may have caused a stable swirl-type
P4 R      Ir      p.#sCC        's


flow profile corkscrewing
9501240226 UtjxW ¢ vv      -31-15                                      lk (t


down the pipe. The licensee postulated
0


that the swirl flow added a radial flow error to the test instruments.
v-'    IN 95-08 January 30, 1995 Discussion


The flowmeter
The licensee examined the 1993 North Anna Unit 2 flow balance test data and


was calibrated
observed that some of the data indicated that the instrument errors


assuming a primarily
significantly exceeded accuracies assumed for the tests. Numerous factors may


axial flow profile. In subsequent
affect the accuracy of this flowmeter including pipe dimensions, fluid flow


testing at a national laboratory, Controlotron
effects, transducer mounting, and instrument setup and operation. After the


ultrasonic
test, the licensee investigated and concluded that the instrument inaccuracy


flowmeter
most likely was caused by flow effects associated with the piping


data varied up to 5% at different
configuration. The piping arrangement, which contained several out-of-plane


orientations
bends that forced the flow to change direction numerous times before entering


around the pipe at a position approximately
the straight section of pipe containing the ultrasonic transducers, may have


15 pipe diameters
caused a stable swirl-type flow profile corkscrewing down the pipe. The


downstream
licensee postulated that the swirl flow added a radial flow error to the test


of a single bend. The test configuration
instruments. The flowmeter was calibrated assuming a primarily axial flow


did not include any out-of-plane
profile. In subsequent testing at a national laboratory, Controlotron


bends, indicating
ultrasonic flowmeter data varied up to 5% at different orientations around the


that it is also possible for a non-uniform
pipe at a position approximately 15 pipe diameters downstream of a single


flow profile to exist in the absence of out-of-plane
bend. The test configuration did not include any out-of-plane bends, indicating that it is also possible for a non-uniform flow profile to exist in


bends, causing flow measurements
the absence of out-of-plane bends, causing flow measurements with larger than


with larger than expected errors.The licensee noted that the instrument
expected errors.


output during the test did not give any indication
The licensee noted that the instrument output during the test did not give any


of measurement
indication of measurement problems. The instruments displayed little noise


problems.
and only the expected small-magnitude random flow fluctuations. The lack of


The instruments
erratic instrument readings could easily be interpreted as meaning the


displayed
readings were valid (i.e., within the stated accuracy). However, the licensee


little noise and only the expected small-magnitude
tested the instrument and determined that it could register a stable reading


random flow fluctuations.
while a significant error was occurring. Therefore, the licensee concluded


The lack of erratic instrument
that repeatability of the data does not prove that the flow has been measured


readings could easily be interpreted
accurately.


as meaning the readings were valid (i.e., within the stated accuracy).
After the test failure, the licensee found several inconsistencies in the test


However, the licensee tested the instrument
data which indicated problems in data accuracy. As an example, when the


and determined
A HHSI pump replaced the C HHSI pump as the operating pump, without any other


that it could register a stable reading while a significant
changes in system resistance, the B cold leg flow rate increased by


error was occurring.
8.4 percent while the A cold leg flow rate increased by 1.5 percent and the


Therefore, the licensee concluded that repeatability
C cold leg flow rate did not change. The licensee concluded that these values


of the data does not prove that the flow has been measured accurately.
corresponded to an implausible change in the highest cold leg flow path from


After the test failure, the licensee found several inconsistencies
loop A to loop B when the sole change was which injection pump was operating.
 
in the test data which indicated
 
problems in data accuracy.
 
As an example, when the A HHSI pump replaced the C HHSI pump as the operating
 
pump, without any other changes in system resistance, the B cold leg flow rate increased
 
by 8.4 percent while the A cold leg flow rate increased
 
by 1.5 percent and the C cold leg flow rate did not change. The licensee concluded
 
that these values corresponded
 
to an implausible
 
change in the highest cold leg flow path from loop A to loop B when the sole change was which injection
 
pump was operating.


In addition, the head curve for the A HHSI pump was lower than that for the
In addition, the head curve for the A HHSI pump was lower than that for the


I I n-' IN 95-08 January 30, 1995 C HHSI pump; thus, the A HHSI pump would be expected to supply flow rates less than the C HHSI pump for the same system resistance.
I I                                                       n-'   IN 95-08 January 30, 1995 C HHSI pump; thus, the A HHSI pump would be expected to supply flow rates less


===However, the ultrasonic===
than the C HHSI pump for the same system resistance. However, the ultrasonic
instruments


indicated
instruments indicated that the A HHSI pump delivered 3.3 percent more flow


that the A HHSI pump delivered
than the C HHSI pump. This was contrary to the previously measured pump head


3.3 percent more flow than the C HHSI pump. This was contrary to the previously
curve data. At the same time, installed plant process instruments indicated


measured pump head curve data. At the same time, installed
that the A HHSI pump delivered 3.4 percent less flow than the C HHSI pump, a


plant process instruments
measurement consistent with the pump curves.


indicated that the A HHSI pump delivered
The licensee could not determine with certainty the factors that resulted in


3.4 percent less flow than the C HHSI pump, a measurement
the unanticipated measurement errors in this event. Conditions specific to an


consistent
application can cause deviations from the vendor-supplied instrument


with the pump curves.The licensee could not determine
accuracies. However, during the investigation the licensee developed methods


with certainty
that could be used to determine when the ultrasonic flowmeter may not yield


the factors that resulted in the unanticipated
the assumed accuracy. These methods include comparing ultrasonic flowmeter


measurement
data from several locations or different orientations at the same location or


errors in this event. Conditions
by comparing the data from these instruments with data from permanently


specific to an application
installed instruments. Test results can also be compared with expected system


can cause deviations
behavior.


from the vendor-supplied
The NRC staff has approved a request from the licensee of the North Anna plant


instrument
to modify the technical specification that specifies the acceptance criteria


accuracies.
for the HHSI pump flow rates. The change removes the specific fixed values


However, during the investigation
for the flow from the technical specifications and permits the licensee to


the licensee developed
establish allowable values by analysis, providing greater operational


methods that could be used to determine
flexibility. The licensee is also planning to (1) install permanent flow


when the ultrasonic
instrumentation that will supply highly accurate data for future flow balance


flowmeter
testing and (2)supply training concerning the accuracy of clamp-on ultrasonic


may not yield the assumed accuracy.
flowmeters to the personnel who use them.


These methods include comparing
Licensees frequently use flow measurements to demonstrate that safety-related


ultrasonic
component performance is adequate to meet the demands indicated by the


flowmeter data from several locations
accident or transient analyses. Therefore, obtaining accurate flow


or different
measurements is important to safety. When balancing the flow of HHSI


orientations
injection paths, flow rates need to be accurately measured to demonstrate that


at the same location or by comparing
the unit complies with the assumptions in safety analyses and is operated in


the data from these instruments
an analyzed condition. At North Anna the licensee initially failed to detect


with data from permanently
inaccurate flow data because of a failure to verify the consistency, repeatability and reasonableness of the data from the ultrasonic flow


installed
measurement instruments. Although technical specification requirements were


instruments.
not met at North Anna, the licensee later analyzed the issue and concluded


Test results can also be compared with expected system behavior.The NRC staff has approved a request from the licensee of the North Anna plant to modify the technical
that the HHSI system would have performed its design safety function.


specification
s'-'  IN 95-08 January 30, 1995 This information notice requires no specific action or written response. If


that specifies
you have any question about the information in this notice, please contact one


the acceptance
of the technical contacts listed below or the appropriate Office of Nuclear


criteria for the HHSI pump flow rates. The change removes the specific fixed values for the flow from the technical
Reactor Regulation (NRR) project manager.


specifications
ran K. Grimes, Director


and permits the licensee to establish
Division of Project Support


allowable
Office of Nuclear Reactor Regulation


values by analysis, providing
Technical contacts:  Donald R. Taylor, RII      Larry W. Garner, RII


greater operational
(703) 894-5421              (404) 331-4663 Hukam C. Garg, NRR


flexibility.
(301) 504-2929 Attachment:  List of Recently Issued Information Notices


The licensee is also planning to (1) install permanent
Re-ttachment


flow instrumentation
.


that will supply highly accurate data for future flow balance testing and (2) supply training concerning
IN 95-08 January 30, 1995 Page I of 1 LIST OF RECENTLY ISSUED


the accuracy of clamp-on ultrasonic
NRC INFORMATION NOTICES


flowmeters
Information                                    Date of


to the personnel
Notice No.              Subject                Issuance    Issued to


who use them.Licensees
95-07          Radiopharmaceutical Vial      01/27/95    All USNRC medical licensees


frequently
Breakage during Preparation                authorized to use byproduct


use flow measurements
material for diagnostic


to demonstrate
procedures.
 
that safety-related
 
component
 
performance
 
is adequate to meet the demands indicated
 
by the accident or transient
 
analyses.
 
Therefore, obtaining
 
accurate flow measurements
 
is important
 
to safety. When balancing
 
the flow of HHSI injection
 
paths, flow rates need to be accurately


measured to demonstrate
95-06          Potential Blockage of          01/25/95    All holders of OLs or CPs


that the unit complies with the assumptions
Safety-Related Strainers                    for nuclear power reactors.


in safety analyses and is operated in an analyzed condition.
by Material Brought Inside


At North Anna the licensee initially
Containment


failed to detect inaccurate
95-05          Undervoltage Protection        01/20/95    All holders of Construction


flow data because of a failure to verify the consistency, repeatability
Relay Settings Out of                       Permits for nuclear power


and reasonableness
Tolerance Due to Test                      reactors.


of the data from the ultrasonic
Equipment Harmonics


flow measurement
95-04          Excessive Cooldown and        01/19/95    All holders of OLs or CPs


instruments.
Depressurization of the                    for nuclear power reactors.


Although technical
Reactor Coolant System


specification
Following a Loss of


requirements
Offsite Power


were not met at North Anna, the licensee later analyzed the issue and concluded that the HHSI system would have performed
95-03          Loss of Reactor Coolant        01/18/95    All holders of Ols or CPs


its design safety function.
Inventory and Potential                    for nuclear power reactors.


s '-' IN 95-08 January 30, 1995 This information
Loss of Emergency Mitiga- tion Functions While in


notice requires no specific action or written response.
a Shutdown Condition


If you have any question about the information
95-02          Problems with General          01/17/95    All holders of OLs or CPs


in this notice, please contact one of the technical
Electric CR2940 Contact                    for nuclear power reactors.
 
contacts listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.ran K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
 
Technical
 
contacts:
Donald R. Taylor, RII Larry W. Garner, RII (703) 894-5421 (404) 331-4663 Hukam C. Garg, NRR (301) 504-2929 Attachment:
List of Recently Issued Information
 
Notices
 
.Re-ttachment
 
IN 95-08 January 30, Page I of 1 1995 LIST OF RECENTLY ISSUED NRC INFORMATION
 
NOTICES Information
 
Date of Notice No. Subject Issuance Issued to 95-07 Radiopharmaceutical
 
===Vial Breakage during Preparation===
01/27/95 All USNRC medical licensees authorized
 
to use byproduct material for diagnostic
 
procedures.


95-06 Potential
Blocks in Medium-Voltage


Blockage of Safety-Related
Circuit Breakers


===Strainers by Material Brought Inside Containment===
95-01          DOT Safety Advisory:          01/04/95     All U.S. Nuclear Regulatory
01/25/95 All holders of OLs or CPs for nuclear power reactors.95-05 Undervoltage


Protection
High Pressure Aluminum                      Commission licensees.


Relay Settings Out of Tolerance
Seamless and Aluminum


Due to Test Equipment
Composite Hoop-Wrapped


Harmonics 01/20/95 All holders Permits for reactors.of Construction
Cylinders


nuclear power 95-04 95-03 Excessive
OL - Operating License


Cooldown and Depressurization
CP =  Construction Permit


of the Reactor Coolant System Following
>                      S                      95-08 January 30, 1995 This information notice requires no specific action or written response. If


a Loss of Offsite Power Loss of Reactor Coolant Inventory
you have any question about the information in this notice, please contact one


and Potential Loss of Emergency
of the technical contacts listed below or the appropriate Office of Nuclear


Mitiga-tion Functions
Reactor Regulation (NRR) project manager.


While in a Shutdown Condition Problems with General Electric CR2940 Contact Blocks in Medium-Voltage
Original signed by


Circuit Breakers DOT Safety Advisory: High Pressure Aluminum Seamless and Aluminum Composite
Brian K. Grime!
                                    Brian K. Grimes, Director


Hoop-Wrapped
Division of Project Support


Cylinders 01/19/95 01/18/95 01/17/95 01/04/95 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 U.S. Nuclear Regulatory
Office of Nuclear Reactor Regulation


Commission
Technical contacts:    Donald R. Taylor, RII              Larry W. Garner, RII


licensees.
(703) 894-5421                      (404) 331-4663 Hukam C. Garg, NRR


95-02 95-01 OL -Operating
(301) 504-2929 Attachment:  List of Recently Issued Information Notices


License CP = Construction
DOCUMENT NAME:  95-08.IN


Permit
NOTE: VENDOR COMMENTS RECEIVED, NO SIGNIFICANT CHANGES WERE MADE


> S 95-08 January 30, 1995 This information
OFFICE    *RPB:ADM by Email    *OGCB:DORS        *RIIby Phoncon    *DRP:RIIby Phoncon


notice requires no specific action or written response.
,AME      TechEd              AJKugler          DRTaylor          LWGarner


If you have any question about the information
DATE      09/07/94            09/13/94          09/22/94          09/22/94 OFFICE    *DRP:RI Iby Phoncon  *HICB:DRCH        *C/HICB:DRCH      *D/DRCH


in this notice, please contact one of the technical
NAME    DMVerrelli          HCGarg            JSWermiel          BABoger


contacts listed below or the appropriate
DATE    09/27/94            09/,W94 /          09/22/94          09/22/94 OFFICE    C/OECB:DOPS              OP    /
    NAME    AEChaffee*          Arxi    es


Office of Nuclear Reactor Regulation (NRR) project manager.Original signed by Brian K. Grime!Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
DATE    11 /22/94              01&1y 95                          T


Technical
OFFICIAL RECORD COPY


contacts: Donald R. Taylor, RII (703) 894-5421 Larry W. Garner, RII (404) 331-4663 Hukam C. Garg, NRR (301) 504-2929 Attachment:
-
List of Recently Issued Information
                                                              IN 95-XX


Notices DOCUMENT NAME: 95-08.IN NOTE: VENDOR COMMENTS RECEIVED, NO SIGNIFICANT
January XX, 1995 This information notice requires no specific action or written response. If


CHANGES WERE MADE OFFICE *RPB:ADM by Email *OGCB:DORS
you have any question about the information in this notice, please contact one


*RIIby Phoncon *DRP:RIIby
of the technical contacts listed below or the appropriate Office of Nuclear


Phoncon ,AME TechEd AJKugler DRTaylor LWGarner DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP:RI Iby Phoncon *HICB:DRCH
Reactor Regulation (NRR) project manager.


*C/HICB:DRCH
Brian K. Grimes, Director


*D/DRCH NAME DMVerrelli
Division of Project Support


HCGarg JSWermiel
Office of Nuclear Reactor Regulation


BABoger DATE 09/27/94 09/, W94 / 09/22/94 09/22/94 OFFICE C/OECB:DOPS
Technical contacts:    Donald R. Taylor, RII            Larry W. Garner, RI!
                        (703) 894-5421                  (404) 331-4663 Hukam C. Garg, NRR


OP /NAME AEChaffee*
(301) 504-2929 Attachment:  List of Recently Issued Information Notices
Arxi es DATE 11 /22/94 01&1y 95 T OFFICIAL RECORD COPY


-IN 95-XX January XX, 1995 This information
DOCUMENT NAME:    S:\DOPS_SEC\CLAMP-ON.INR


notice requires no specific action or written response.
mnTE- VENDOR COMMENTS RFCFTVFD      NO SIGNIFICANT CHANGES WERE MADE


If you have any question about the information
OFFICE    *RPB:ADM  by Emai t  *OGCB:DORS    *RIIby Phoncon    *DRP:RIIby Phoncon


in this notice, please contact one of the technical
NAME      TechEd                AJKugler      DRTaylor          LWGarner


contacts listed below or the appropriate
DATE      09/07/94              09/13/94      09/22/94          09/22/94 OFFICE    *DRP: RIIby Phoncon  *HICB:DRCH    *C/HICB:DRCH      *D/DRCH


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
KANE    DMVerrelli            HCGarg        JSWermiel          BABoger


Technical
DATE    09/27/94              09/19/94      09/22/94          09/22/94 OFFICE    C/OECB:DOPS          D/DOPS


contacts:
NAME    AEChaffee*            BKGrimes
Donald R. Taylor, RII (703) 894-5421 Larry W. Garner, RI!(404) 331-4663 Hukam C. Garg, NRR (301) 504-2929 Attachment:
List of Recently Issued Information


Notices DOCUMENT NAME: S:\DOPS_SEC\CLAMP-ON.INR
DATE      11/22/94              11/  /94                        _  _  _  _=
                                  OFFICIAL RECORD COPY


mnTE- VENDOR COMMENTS RFCFTVFD NO SIGNIFICANT
<-/
                                                                    IN 94-XX


CHANGES WERE MADE OFFICE *RPB:ADM by Emai t *OGCB:DORS
November XX, 1994 This information notice requires no specific action or written response. If


*RIIby Phoncon *DRP:RIIby
you have any question about the information in this notice, please contact one


Phoncon NAME TechEd AJKugler DRTaylor LWGarner DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP: RIIby Phoncon *HICB:DRCH
of the technical contacts listed below or the appropriate Office of Nuclear


*C/HICB:DRCH
Reactor Regulation (NRR) project manager.


*D/DRCH KANE DMVerrelli
Brian K. Grimes, Director


HCGarg JSWermiel
Division of Project Support


BABoger DATE 09/27/94 09/19/94 09/22/94 09/22/94 OFFICE C/OECB:DOPS
Office of Nuclear Reactor Regulation


D/DOPS NAME AEChaffee*
Technical contacts: 'onald R. Taylor, RII
BKGrimes DATE 11/22/94 11/ /94 _ _ _ _=OFFICIAL RECORD COPY


<-/IN 94-XX November XX, 1994 This information
(70 ) 894-5421 Lar y W. Garner, RII


notice requires no specific action or written response.
(40 ) 331-4663 Huk    C. Garg, NRR


If you have any question about the information
(30 ) 504-2929 Attachment:      List of Recently Issued Information Notices


in this notice, please contact one of the technical
DOCUMENT NAME:      S:\DOPSSEC\CLAMP-ON.INR


contacts listed below or the appropriate
MnTr-    vrTnnn rnMMFNTq RFCFIVFED      NO SIGNIFICANT CHANGES WERE MADE


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
OFFICE        *RPB:ADM  by EmaiL    *OGCB:DORS    *RI Iby  Phoncon    *DRP:RI Iby Phoncon


Technical
NAME        TechEd                AJKugler      DRTaylor            LWGarner


contacts:  
DATE        09/07/94              09/13/94      09/22/94            09/22/94 OFFICE        *DRP:RI Iby Phomon    *HICB:DRCH    *C/HICB:DRCH        *D/DRCH
'onald R. Taylor, RII (70 ) 894-5421 Lar y W. Garner, RII (40 ) 331-4663 Huk C. Garg, NRR (30 ) 504-2929 Attachment:  
List of Recently Issued Information


Notices DOCUMENT NAME: S:\DOPSSEC\CLAMP-ON.INR
OMWE        DMVerrelli            HCGarg          JSWermiel          BABoger


MnTr- vrTnnn rnMMFNTq RFCFIVFED
DATE        09/27/94              09/19/94        09/22/94            09/22/94 OFFICE        C/OECB:DOPS          D/DOPS


NO SIGNIFICANT
NAME        AEChaffee*            BKGrimes      _        _,
                11/22/94              11/  /94 OFFICIAL RECORD COPY


CHANGES WERE MADE OFFICE *RPB:ADM by EmaiL *OGCB:DORS
IN 94-XX


*RI Iby Phoncon *DRP:RI Iby Phoncon NAME TechEd AJKugler DRTaylor LWGarner DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP:RI Iby Phomon *HICB:DRCH
November XX, 1994 This information notice requires no specific action or written response. If


*C/HICB:DRCH
you have any question about the information in this notice, please contact one


*D/DRCH OMWE DMVerrelli
of the technical contacts listed below or the appropriate Office of Nuclear


HCGarg JSWermiel
Reactor Regulation (NRR) project manager.


BABoger DATE 09/27/94 09/19/94 09/22/94 09/22/94 OFFICE C/OECB:DOPS
Brian K. Grimes, Director


D/DOPS NAME AEChaffee*
Division of Project Support
BKGrimes _ _, 11/22/94 11/ /94 OFFICIAL RECORD COPY


IN 94-XX November XX, 1994 This information
Office of Nuclear Reactor Regulation


notice requires no specific action or written response.
Technical contacts:      Donald R. Taylor, RII


If you have any question about the information
(703) 894-5421 Larry W. Garner, RII


in this notice, please contact one of the technical
(404) 331-4663 Hukam C. Garg, NRR


contacts listed below or the appropriate
(301) 504-2929 Attachment:    List of Recently Issued Information Notices


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
NOTF    VFNDOR COMMENTS RECEIVED. NO SIGNIFICANT CHANGES WERE MADE


Technical
OFFICE        *RPB:ADM  by Email  *OGCB:DORS  *RIIby Phoncon      *DRP:RIIby Phoncon


contacts: Donald R. Taylor, RII (703) 894-5421 Larry W. Garner, RII (404) 331-4663 Hukam C. Garg, NRR (301) 504-2929 Attachment:
NAME        TechEd              AJKugler    DRTaylor            LWGarner
List of Recently Issued Information


Notices NOTF VFNDOR COMMENTS RECEIVED.
DATE        09/07/94            09/13/94    09/22/94            09/22/94 OFFICE        *DRP:RIIby Phoncon  *HICB:DRCH  *C/HICB:DRCH        *D/DRCH


NO SIGNIFICANT
NAME        DMVerrelli          HCGarg      JSWermiel          BABoger


CHANGES WERE MADE OFFICE *RPB:ADM by Email *OGCB:DORS
DATE        09/27/94            09/19/94    09/22/94            09/22/94 OFFICE       C/OECB:DOPS        D/DOPS


*RIIby Phoncon *DRP:RIIby
NAME        AEf ffeBKGrimes


Phoncon NAME TechEd AJKugler DRTaylor LWGarner DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP:RIIby
DATE       11/2494        Af  11/ /94     __I


Phoncon *HICB:DRCH
DOCUMENT NAME:       G:\IN\CLAMP-0N.INK


*C/HICB:DRCH
IN 94-XX


*D/DRCH NAME DMVerrelli
November XX, 1994 This information notice requires no specific action or written response. If


HCGarg JSWermiel
you have any question about the information in this notice, please contact one


BABoger DATE 09/27/94 09/19/94 09/22/94 09/22/94 OFFICE C/OECB:DOPS
of the technical contacts listed below or the appropriate Office of Nuclear


D/DOPS NAME AEf ffeBKGrimes
Reactor Regulation (NRR) project manager.


DATE 11/2494 Af 11/ /94 __I DOCUMENT NAME: G:\IN\CLAMP-0N.INK
Brian K. Grimes, Director


IN 94-XX November XX, 1994 This information
Division of Project Support


notice requires no specific action or written response.
Office of Nuclear Reactor Regulation


If you have any question about the information
Technical contacts:    Donald R. Taylor, RII


in this notice, please contact one of the technical
(703) 894-5421 Larry W. Garner, RII


contacts listed below or the appropriate
(404) 331-4663 Hukam C. Garg, NRR


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
(301) 504-2929 Attachment:    List of Recently Issued NRC Information Notices


Technical
NOTE: VENDOR COMMENTS RECEIVED, NO SIGNIFICANT CHANGES WERE MADE


contacts: Donald R. Taylor, RII (703) 894-5421 Larry W. Garner, RII (404) 331-4663 Hukam C. Garg, NRR (301) 504-2929 Attachment:  
OFFICE      *RPB:ADM  by Email *OGCB:DORS    *RIIby Phoncon  *DRP:RIIby Phoncon
List of Recently Issued NRC Information


Notices NOTE: VENDOR COMMENTS RECEIVED, NO SIGNIFICANT
NAME      TechEd            AJKugler      DRTaylor        LWGarner


CHANGES WERE MADE OFFICE *RPB:ADM by Email *OGCB:DORS
DATE      09/07/94          09/13/94      09/22/94        09/22/94 OFFICE     *DRP:RIIby  Phocon *HICB:DRCH    *C/HICB:DRCH    *D/DRCH


*RIIby Phoncon *DRP:RIIby
NAME      DMVerrelli        HCGarg        JSWermiel        BABoger


Phoncon NAME TechEd AJKugler DRTaylor LWGarner DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP:RII by Phocon *HICB:DRCH
DATE09/27/94                 09/19/94       09/22/94       09/22/94 OFFICE     C/OECB:DOPS        D/DOPS


*C/HICB:DRCH
NAME      AEChaffee          BKGrimes


*D/DRCH NAME DMVerrelli
DATE                    .    11/ /94 DOCUMENT NAME:      t:\IN\CLAMP-ON.IN


HCGarg JSWermiel
IN 94-XX


BABoger DATE09/27/94
September XX, 1994 This information notice requires no specific action or written response. If
09/19/94 09/22/94 09/22/94 OFFICE C/OECB:DOPS


D/DOPS NAME AEChaffee
you have any question about the information in this notice, please contact one


BKGrimes DATE .11/ /94 DOCUMENT NAME: t:\IN\CLAMP-ON.IN
of the technical contacts listed below or the appropriate Office of Nuclear


IN 94-XX September
Reactor Regulation (NRR) project manager.


XX, 1994 This information
Brian K. Grimes, Director


notice requires no specific action or written response.
Division of Operating Reactor Support


If you have any question about the information
Office of Nuclear Reactor Regulation


in this notice, please contact one of the technical
Technical contacts:    Donald R. Taylor, RII


contacts listed below or the appropriate
(703) 894-5421 Larry W. Garner, RII


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
(404) 331-4663 Hukam C. Garg, NRR


===Reactor Support Office of Nuclear Reactor Regulation===
(301) 504-2929 Attachment:  List of Recently Issued Information Notices
Technical


contacts: Donald R. Taylor, RII (703) 894-5421 Larry (404)W. Garner, RII 331-4663 Hukam (301)C. Garg, NRR 504-2929 Attachment:
OFFICE      *RPB:ADM by Emal    OGCB:DORS      RII               DRP:RII
List of Recently Issued Information


Notices OFFICE *RPB:ADM by Emal OGCB:DORS
NAME      TechEd            jAJKugler j      DRTaylor          LWGarner


RII DRP:RII NAME TechEd jAJKugler
DATE      09/07/94            09/13/94        09/  /94          09/  /94 OFFICE      DRP:RII             HICB:          C/HICB:DRCH      D/DRH_      tt1 /2.


j DRTaylor LWGarner DATE 09/07/94 09/13/94 09/ /94 09/ /94 OFFICE DRP:RII HICB: C/HICB:DRCH
NAME      DMVerrelli          HCGar      ^    JSWermieltior


D/DRH_NAME DMVerrelli
DATE      09/ /94            09///94      _J09/22/94          O9/il/94 OFFICE      C/OGCB:DORS        D/DORS


HCGar ^ JSWermieltior
NAME      ELDoolittle        BKGrimes


DATE 09/ /94 09///94 _J09/22/94 O9/il/94 OFFICE C/OGCB:DORS
DATE       09/   /94           09/   /94


D/DORS NAME ELDoolittle
IN 94-XX


BKGrimes DATE 09/ /94 09/ /94 tt1 /2.
September XX, 1994 This information notice requires no specific action or written response. If


IN 94-XX September
you have any question about the information in this notice, please contact one


XX, 1994 This information
of the technical contacts 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 question about the information
Brian K. Grimes, Director


in this notice, please contact one of the technical
Division of Operating Reactor Support


contacts listed below or the appropriate
Office of Nuclear Reactor Regulation


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
Technical contacts:    Uonald R. Taylor, RII


===Reactor Support Office of Nuclear Reactor Regulation===
(703) 894-5421 Larry W. Garner, RII
Technical


contacts: Uonald R. Taylor, RII (703) 894-5421 Larry W. Garner, RII (404) 331-46E3 Hukam C. Garg, NRR (301) 504-2929 Attachment:
(404) 331-46E3 Hukam C. Garg, NRR
List of Recently Issued Information


Notices OFFICE *RPB:ADM EMA)L OGCB:DORS
(301) 504-2929 Attachment:   List of Recently Issued Information Notices


RII DRP:RII NAME TechEd AJKu ler DRTaylor LWGarner DATE 09/07/94 09/13/94 09/ /94 09/ /94 OFFICE DRP:RII HICB:DRCH
OFFICE    *RPB:ADM EMA)L    OGCB:DORS        RII               DRP:RII


C/HICB:DRCH
NAME      TechEd            AJKu ler        DRTaylor          LWGarner


D/DRCH NAME DMVerrelli
DATE      09/07/94          09/13/94        09/ /94            09/ /94 OFFICE    DRP:RII          HICB:DRCH        C/HICB:DRCH        D/DRCH


HCGarg JSWermiel
NAME      DMVerrelli        HCGarg           JSWermiel         BABoger


BABoger DATE 09/ /94 09/ /94 09/ /94 09/ /94 OFFICE C/OGCB:DORS
DATE     09/   /94         09/ /94         09/ /94           09/ /94 OFFICE     C/OGCB:DORS      D/DORS


D/DORS NAME ELDoolittle
NAME     ELDoolittle       BKGrimes                                      II


BKGrimes II DATE 09/ /94 09/ /394}}
DATE     09/ /94           09/ /394}}


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

Latest revision as of 04:30, 24 November 2019

Inaccurate Data Obtained with Clamp-On Ultrasonic Flow Measurement Instruments
ML031060366
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: 01/30/1995
From: Grimes B
Office of Nuclear Reactor Regulation
To:
References
IN-95-008, NUDOCS 9501240226
Download: ML031060366 (12)
v • d • e


X '..

UNITED STATES

NUCLEAR REGULATORY COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555 January 30, 1995 NRC INFORMATION NOTICE 95-08: INACCURATE DATA OBTAINED WITH CLAMP-ON

ULTRASONIC FLOW MEASUREMENT INSTRUMENTS

Addressees

All holders of operating licenses or construction permits for nuclear power

reactors.

PurDose

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

notice to alert addressees to difficulties in accurately measuring flow rates

with clamp-on ultrasonic flow measurement instruments. 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.

DescriDtion of Circumstances

O October 14, 1993, while performing a high head safety injection (HHSI) flow

balance test, the licensee for North Anna Unit 2 determined that the as-found

safety injection cold leg branch line flow rates did not meet the technical

specification requirements. The as-found cold leg branch line flow rates had

also failed to meet the technical specification requirements during the

previous test in April 1992.

The North Anna Technical Specifications give limits related to both minimum

and maximum safety injection line flow rates. For North Anna, these two

technical specification limits resulted in an very narrow allowed operating

band, which required the use of highly accurate flow measurement instruments

for flow tests.

The licensee performed the flow balance using System 990 Uniflow Universal

Transit-Time Flowmeters manufactured by Controlotron of Hauppauge, New York.

The Uniflow flowmeter is a clamp-on non-intrusive portable flowmeter that uses

multi-pulse, transit-time ultrasonic technology to measure precisely the flow

rate. The flowmeter induces alternate upstream and downstream ultrasonic

signals and measures the difference in transit times. This information isthe

then used to determine the axial fluid velocity and the flow rate through

pipe. Inaccuracies associated with the use of these instruments at North Anna

combined with the narrow band of allowable flows caused problems which

contributed to the failure to meet technical specification requirements.

P4 R Ir p.#sCC 's

9501240226 UtjxW ¢ vv -31-15 lk (t

0

v-' IN 95-08 January 30, 1995 Discussion

The licensee examined the 1993 North Anna Unit 2 flow balance test data and

observed that some of the data indicated that the instrument errors

significantly exceeded accuracies assumed for the tests. Numerous factors may

affect the accuracy of this flowmeter including pipe dimensions, fluid flow

effects, transducer mounting, and instrument setup and operation. After the

test, the licensee investigated and concluded that the instrument inaccuracy

most likely was caused by flow effects associated with the piping

configuration. The piping arrangement, which contained several out-of-plane

bends that forced the flow to change direction numerous times before entering

the straight section of pipe containing the ultrasonic transducers, may have

caused a stable swirl-type flow profile corkscrewing down the pipe. The

licensee postulated that the swirl flow added a radial flow error to the test

instruments. The flowmeter was calibrated assuming a primarily axial flow

profile. In subsequent testing at a national laboratory, Controlotron

ultrasonic flowmeter data varied up to 5% at different orientations around the

pipe at a position approximately 15 pipe diameters downstream of a single

bend. The test configuration did not include any out-of-plane bends, indicating that it is also possible for a non-uniform flow profile to exist in

the absence of out-of-plane bends, causing flow measurements with larger than

expected errors.

The licensee noted that the instrument output during the test did not give any

indication of measurement problems. The instruments displayed little noise

and only the expected small-magnitude random flow fluctuations. The lack of

erratic instrument readings could easily be interpreted as meaning the

readings were valid (i.e., within the stated accuracy). However, the licensee

tested the instrument and determined that it could register a stable reading

while a significant error was occurring. Therefore, the licensee concluded

that repeatability of the data does not prove that the flow has been measured

accurately.

After the test failure, the licensee found several inconsistencies in the test

data which indicated problems in data accuracy. As an example, when the

A HHSI pump replaced the C HHSI pump as the operating pump, without any other

changes in system resistance, the B cold leg flow rate increased by

8.4 percent while the A cold leg flow rate increased by 1.5 percent and the

C cold leg flow rate did not change. The licensee concluded that these values

corresponded to an implausible change in the highest cold leg flow path from

loop A to loop B when the sole change was which injection pump was operating.

In addition, the head curve for the A HHSI pump was lower than that for the

I I n-' IN 95-08 January 30, 1995 C HHSI pump; thus, the A HHSI pump would be expected to supply flow rates less

than the C HHSI pump for the same system resistance. However, the ultrasonic

instruments indicated that the A HHSI pump delivered 3.3 percent more flow

than the C HHSI pump. This was contrary to the previously measured pump head

curve data. At the same time, installed plant process instruments indicated

that the A HHSI pump delivered 3.4 percent less flow than the C HHSI pump, a

measurement consistent with the pump curves.

The licensee could not determine with certainty the factors that resulted in

the unanticipated measurement errors in this event. Conditions specific to an

application can cause deviations from the vendor-supplied instrument

accuracies. However, during the investigation the licensee developed methods

that could be used to determine when the ultrasonic flowmeter may not yield

the assumed accuracy. These methods include comparing ultrasonic flowmeter

data from several locations or different orientations at the same location or

by comparing the data from these instruments with data from permanently

installed instruments. Test results can also be compared with expected system

behavior.

The NRC staff has approved a request from the licensee of the North Anna plant

to modify the technical specification that specifies the acceptance criteria

for the HHSI pump flow rates. The change removes the specific fixed values

for the flow from the technical specifications and permits the licensee to

establish allowable values by analysis, providing greater operational

flexibility. The licensee is also planning to (1) install permanent flow

instrumentation that will supply highly accurate data for future flow balance

testing and (2)supply training concerning the accuracy of clamp-on ultrasonic

flowmeters to the personnel who use them.

Licensees frequently use flow measurements to demonstrate that safety-related

component performance is adequate to meet the demands indicated by the

accident or transient analyses. Therefore, obtaining accurate flow

measurements is important to safety. When balancing the flow of HHSI

injection paths, flow rates need to be accurately measured to demonstrate that

the unit complies with the assumptions in safety analyses and is operated in

an analyzed condition. At North Anna the licensee initially failed to detect

inaccurate flow data because of a failure to verify the consistency, repeatability and reasonableness of the data from the ultrasonic flow

measurement instruments. Although technical specification requirements were

not met at North Anna, the licensee later analyzed the issue and concluded

that the HHSI system would have performed its design safety function.

s'-' IN 95-08 January 30, 1995 This information notice requires no specific action or written response. If

you have any question about the information in this notice, please contact one

of the technical contacts listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

ran K. Grimes, Director

Division of Project Support

Office of Nuclear Reactor Regulation

Technical contacts: Donald R. Taylor, RII Larry W. Garner, RII

(703) 894-5421 (404) 331-4663 Hukam C. Garg, NRR

(301) 504-2929 Attachment: List of Recently Issued Information Notices

Re-ttachment

.

IN 95-08 January 30, 1995 Page I of 1 LIST OF RECENTLY ISSUED

NRC INFORMATION NOTICES

Information Date of

Notice No. Subject Issuance Issued to

95-07 Radiopharmaceutical Vial 01/27/95 All USNRC medical licensees

Breakage during Preparation authorized to use byproduct

material for diagnostic

procedures.

95-06 Potential Blockage of 01/25/95 All holders of OLs or CPs

Safety-Related Strainers for nuclear power reactors.

by Material Brought Inside

Containment

95-05 Undervoltage Protection 01/20/95 All holders of Construction

Relay Settings Out of Permits for nuclear power

Tolerance Due to Test reactors.

Equipment Harmonics

95-04 Excessive Cooldown and 01/19/95 All holders of OLs or CPs

Depressurization of the for nuclear power reactors.

Reactor Coolant System

Following a Loss of

Offsite Power

95-03 Loss of Reactor Coolant 01/18/95 All holders of Ols or CPs

Inventory and Potential for nuclear power reactors.

Loss of Emergency Mitiga- tion Functions While in

a Shutdown Condition

95-02 Problems with General 01/17/95 All holders of OLs or CPs

Electric CR2940 Contact for nuclear power reactors.

Blocks in Medium-Voltage

Circuit Breakers

95-01 DOT Safety Advisory: 01/04/95 All U.S. Nuclear Regulatory

High Pressure Aluminum Commission licensees.

Seamless and Aluminum

Composite Hoop-Wrapped

Cylinders

OL - Operating License

CP = Construction Permit

> S 95-08 January 30, 1995 This information notice requires no specific action or written response. If

you have any question about the information in this notice, please contact one

of the technical contacts listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

Original signed by

Brian K. Grime!

Brian K. Grimes, Director

Division of Project Support

Office of Nuclear Reactor Regulation

Technical contacts: Donald R. Taylor, RII Larry W. Garner, RII

(703) 894-5421 (404) 331-4663 Hukam C. Garg, NRR

(301) 504-2929 Attachment: List of Recently Issued Information Notices

DOCUMENT NAME: 95-08.IN

NOTE: VENDOR COMMENTS RECEIVED, NO SIGNIFICANT CHANGES WERE MADE

OFFICE *RPB:ADM by Email *OGCB:DORS *RIIby Phoncon *DRP:RIIby Phoncon

,AME TechEd AJKugler DRTaylor LWGarner

DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP:RI Iby Phoncon *HICB:DRCH *C/HICB:DRCH *D/DRCH

NAME DMVerrelli HCGarg JSWermiel BABoger

DATE 09/27/94 09/,W94 / 09/22/94 09/22/94 OFFICE C/OECB:DOPS OP /

NAME AEChaffee* Arxi es

DATE 11 /22/94 01&1y 95 T

OFFICIAL RECORD COPY

-

IN 95-XX

January XX, 1995 This information notice requires no specific action or written response. If

you have any question about the information in this notice, please contact one

of the technical contacts listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

Brian K. Grimes, Director

Division of Project Support

Office of Nuclear Reactor Regulation

Technical contacts: Donald R. Taylor, RII Larry W. Garner, RI!

(703) 894-5421 (404) 331-4663 Hukam C. Garg, NRR

(301) 504-2929 Attachment: List of Recently Issued Information Notices

DOCUMENT NAME: S:\DOPS_SEC\CLAMP-ON.INR

mnTE- VENDOR COMMENTS RFCFTVFD NO SIGNIFICANT CHANGES WERE MADE

OFFICE *RPB:ADM by Emai t *OGCB:DORS *RIIby Phoncon *DRP:RIIby Phoncon

NAME TechEd AJKugler DRTaylor LWGarner

DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP: RIIby Phoncon *HICB:DRCH *C/HICB:DRCH *D/DRCH

KANE DMVerrelli HCGarg JSWermiel BABoger

DATE 09/27/94 09/19/94 09/22/94 09/22/94 OFFICE C/OECB:DOPS D/DOPS

NAME AEChaffee* BKGrimes

DATE 11/22/94 11/ /94 _ _ _ _=

OFFICIAL RECORD COPY

<-/

IN 94-XX

November XX, 1994 This information notice requires no specific action or written response. If

you have any question about the information in this notice, please contact one

of the technical contacts listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

Brian K. Grimes, Director

Division of Project Support

Office of Nuclear Reactor Regulation

Technical contacts: 'onald R. Taylor, RII

(70 ) 894-5421 Lar y W. Garner, RII

(40 ) 331-4663 Huk C. Garg, NRR

(30 ) 504-2929 Attachment: List of Recently Issued Information Notices

DOCUMENT NAME: S:\DOPSSEC\CLAMP-ON.INR

MnTr- vrTnnn rnMMFNTq RFCFIVFED NO SIGNIFICANT CHANGES WERE MADE

OFFICE *RPB:ADM by EmaiL *OGCB:DORS *RI Iby Phoncon *DRP:RI Iby Phoncon

NAME TechEd AJKugler DRTaylor LWGarner

DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP:RI Iby Phomon *HICB:DRCH *C/HICB:DRCH *D/DRCH

OMWE DMVerrelli HCGarg JSWermiel BABoger

DATE 09/27/94 09/19/94 09/22/94 09/22/94 OFFICE C/OECB:DOPS D/DOPS

NAME AEChaffee* BKGrimes _ _,

11/22/94 11/ /94 OFFICIAL RECORD COPY

IN 94-XX

November XX, 1994 This information notice requires no specific action or written response. If

you have any question about the information in this notice, please contact one

of the technical contacts listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

Brian K. Grimes, Director

Division of Project Support

Office of Nuclear Reactor Regulation

Technical contacts: Donald R. Taylor, RII

(703) 894-5421 Larry W. Garner, RII

(404) 331-4663 Hukam C. Garg, NRR

(301) 504-2929 Attachment: List of Recently Issued Information Notices

NOTF VFNDOR COMMENTS RECEIVED. NO SIGNIFICANT CHANGES WERE MADE

OFFICE *RPB:ADM by Email *OGCB:DORS *RIIby Phoncon *DRP:RIIby Phoncon

NAME TechEd AJKugler DRTaylor LWGarner

DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP:RIIby Phoncon *HICB:DRCH *C/HICB:DRCH *D/DRCH

NAME DMVerrelli HCGarg JSWermiel BABoger

DATE 09/27/94 09/19/94 09/22/94 09/22/94 OFFICE C/OECB:DOPS D/DOPS

NAME AEf ffeBKGrimes

DATE 11/2494 Af 11/ /94 __I

DOCUMENT NAME: G:\IN\CLAMP-0N.INK

IN 94-XX

November XX, 1994 This information notice requires no specific action or written response. If

you have any question about the information in this notice, please contact one

of the technical contacts listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

Brian K. Grimes, Director

Division of Project Support

Office of Nuclear Reactor Regulation

Technical contacts: Donald R. Taylor, RII

(703) 894-5421 Larry W. Garner, RII

(404) 331-4663 Hukam C. Garg, NRR

(301) 504-2929 Attachment: List of Recently Issued NRC Information Notices

NOTE: VENDOR COMMENTS RECEIVED, NO SIGNIFICANT CHANGES WERE MADE

OFFICE *RPB:ADM by Email *OGCB:DORS *RIIby Phoncon *DRP:RIIby Phoncon

NAME TechEd AJKugler DRTaylor LWGarner

DATE 09/07/94 09/13/94 09/22/94 09/22/94 OFFICE *DRP:RIIby Phocon *HICB:DRCH *C/HICB:DRCH *D/DRCH

NAME DMVerrelli HCGarg JSWermiel BABoger

DATE09/27/94 09/19/94 09/22/94 09/22/94 OFFICE C/OECB:DOPS D/DOPS

NAME AEChaffee BKGrimes

DATE . 11/ /94 DOCUMENT NAME: t:\IN\CLAMP-ON.IN

IN 94-XX

September XX, 1994 This information notice requires no specific action or written response. If

you have any question about the information in this notice, please contact one

of the technical contacts 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 contacts: Donald R. Taylor, RII

(703) 894-5421 Larry W. Garner, RII

(404) 331-4663 Hukam C. Garg, NRR

(301) 504-2929 Attachment: List of Recently Issued Information Notices

OFFICE *RPB:ADM by Emal OGCB:DORS RII DRP:RII

NAME TechEd jAJKugler j DRTaylor LWGarner

DATE 09/07/94 09/13/94 09/ /94 09/ /94 OFFICE DRP:RII HICB: C/HICB:DRCH D/DRH_ tt1 /2.

NAME DMVerrelli HCGar ^ JSWermieltior

DATE 09/ /94 09///94 _J09/22/94 O9/il/94 OFFICE C/OGCB:DORS D/DORS

NAME ELDoolittle BKGrimes

DATE 09/ /94 09/ /94

IN 94-XX

September XX, 1994 This information notice requires no specific action or written response. If

you have any question about the information in this notice, please contact one

of the technical contacts 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 contacts: Uonald R. Taylor, RII

(703) 894-5421 Larry W. Garner, RII

(404) 331-46E3 Hukam C. Garg, NRR

(301) 504-2929 Attachment: List of Recently Issued Information Notices

OFFICE *RPB:ADM EMA)L OGCB:DORS RII DRP:RII

NAME TechEd AJKu ler DRTaylor LWGarner

DATE 09/07/94 09/13/94 09/ /94 09/ /94 OFFICE DRP:RII HICB:DRCH C/HICB:DRCH D/DRCH

NAME DMVerrelli HCGarg JSWermiel BABoger

DATE 09/ /94 09/ /94 09/ /94 09/ /94 OFFICE C/OGCB:DORS D/DORS

NAME ELDoolittle BKGrimes II

DATE 09/ /94 09/ /394


Retrieved from "https://kanterella.com/w/index.php?title=Information_Notice_1995-08,_Inaccurate_Data_Obtained_with_Clamp-On_Ultrasonic_Flow_Measurement_Instruments&oldid=2201240"