United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9601190411



December 4, 1995



Re:  Notification under 10 CFR Part 21 on Model 1154 Series H Sealed

     Reference Gage Transmitter, Range Code 9, Ambient Temperature Effect

     Specification



Pursuant to 10CFR21 Paragraph 21.21(b), Rosemount Nuclear Instruments,

Inc. (RNII) is writing to inform you that the Model 1154 Series H Sealed

Reference Gage Transmitter, Range Code 9 does not meet one of the

published ambient temperature effect specifications within two-sigma to a

95% confidence interval for all possible calibration ranges, (reference-

RNII specification drawing 01154-2010 Rev. G, RNII Product Data Sheet;

PDS4631 and RNII Instruction Manual; MAN4631).  The Model 1154 Series H

Sealed Reference Gage Transmitter is offered in Range Code 9 (Calibration

Range 0-500 to 0-3000 psig) only.  The Model is identified as 1154SH9.



RNII has two published ambient temperature effect specifications

applicable to all Model 1154 Series H transmitters.  Both specifications

are two sigma to a 95% confidence interval for the population of all 1154

Series H transmitters.  The specifications are:



     A.   "+/- (0.15% upper range limit + 0.35% Span) per 50 degrees F

     (27.8 degrees C) ambient temperature change between 40 degrees F

     (4.4 degrees C) and 130 degrees F (54.4 degrees C)."



     B.   "+/- (0.75% upper range limit + 0.50% Span) per 100 degrees F

     (55.6 degrees C) ambient temperature change between 40 degrees F

     (4.4 degrees C) and 200 degrees F (93.3 degrees C)."



RNII analysis has concluded that the Model 1154SH9 transmitter does not

meet the 'A' ambient temperature effect specification for 50 degrees F

(27.8 degrees C) changes for all possible calibrated ranges other than

the standard calibration of 0 to 3000 psig.  The Model 1154SH9

transmitter does meet the 'B' ambient temperature effect specification

for all possible calibrated ranges.



10CFR21 Notification

Model 1154SH9 Ambient Temperature Specification

December 4, 1995

Page 2 of 5



1.0  Name and address of the individual providing the information:



     Mr. Mark Van Sloun

     Vice President & General Manager

     Rosemount Nuclear Instruments, Inc.

     12001 Technology Drive

     Eden Prairie,   MN 55344



2.0  Identification of items supplied:



     Only RNII Model 1154SH9 Sealed Reference Gage Pressure Transmitters

     using temperature effect specification 'A' which:



     2.1  Are calibrated to a calibration range other than 0-3000 psig,

          or



     2.2  Have changed an Amplifier Circuit Board (P/N's 01154-0001-0001,

          01154-0045-0001, 01154-0021-0002 or 01154-0042-0001) where the

          transmitter was not re-tested to verify that ambient

          temperature effect specification 'A' was met.



     Model number 1154SH9 transmitters calibrated 0-3000 psig with

     original electronic packages are not affected by this notification.



3.0  Identification of firm supplying the item:



     Rosemount Nuclear Instruments, Inc. (successor to Rosemount, Inc.)

     12001 Technology Drive

     Eden Prairie,  MN 55344



10CFR21 Notification

Model 1154SH9 Ambient Temperature Specification

December 4, 1995

Page 3 of 5



4.0  Nature of the failure and potential safety hazard:



     This notification is issued to inform all users of Model 1154SH9

     transmitters who are utilizing the ambient temperature effect

     specification for 50 degrees F (27.8 degrees C) changes between the

     ambient temperature range of 40 degrees F (4.4 degrees C) to 130

     degrees F (54.4 degrees C) (identified as specification 'A') that

     the transmitter will not meet this specification within two-sigma to

     a 95% confidence interval if:



     4.1  Calibrated range is other than 0-3000 psig, or



     4.2  Amplifier Circuit Board has been changed since original

          shipment and not tested to the temperature effect

          specification.



     Only the model 1154SH9 transmitter is affected by this notification.

     RNII has analyzed the performance of Model 1154 Series H

     Differential Pressure Range Code 4 through 8 transmitters and have

     concluded these units meet all published ambient temperature effect

     specifications within two sigma to a 95% confidence interval for all

     possible calibrated ranges.  (reference: RNII specification drawing

     01154-2010 Rev. G, RNII Product Data Sheet; PDS4631 and RNII

     Instruction Manual; MAN4631).



     RNII does not have sufficient information to determine the safety

     impact related to plant applications.  Licensees must determine the

     impact on plant operations and plant safety and take action as

     deemed necessary.



10CFR21 Notification

Model 1154SH9 Ambient Temperature Specification

December 4, 1995

Page 4 of 5



5.0  The corrective action which is taken, the name of the individual or

     organization responsible for that action and the length of time

     taken to complete that action:



     5.1  RNII has revised the 1154SH9 two sigma 50 degrees F (27.8

          degrees C) ambient temperature effect specification for all

          possible calibrated ranges, over the ambient temperature change

          between 40 degrees F (4.4 degrees C) and 130 degrees F (54.4

          degrees C) as follows:



          Model 1154SH9 transmitters ambient temperature effect

          specification for all calibrated ranges other then 0-3000 psig:



          "+/- (0.25% upper range limit + 0.50% Span) per 50 degrees F

          (27.8 degrees C) ambient temperature change between 40 degrees

          F (4.4 degrees C) and 130 degrees F (54.4 degrees C)."



     5.2  RNII has revised its Maintenance Recommendation:



          Interchanging Amplifier Circuit Boards is not recommended, if

          using the ambient temperature effect specification identified

          as 'A'



     5.3  RNII will update PDS PDS4631, Instruction Manual MAN4631 and

          RNII specification drawing 01154-2010 within 90 days of this

          notification.  A copy of the revised instruction manual will be

          mailed to you at this time.  The revised specifications will be

          published as follows:



          Range Code 4 through 8

          "+/- (0.15% upper range limit + 0.35% Span) per 50 degrees F

          (27.8 degrees C) ambient temperature change between 40 degrees

          F (4.4 degrees C) and 130 degrees F (54.4 degrees C)."



          Range Code 9

          "+/- (0.25% upper range limit + 0.50% Span) per 50 degrees F

          (27.8 degrees C) ambient temperature change between 40 degrees

          F (4.4 degrees C) and 130 degrees F (54.4 degrees C)."



          All Range Code 4 through 9

          "+/- (0.75% upper range limit + 0.50% Span) per 100 degrees F

          (55.6 degrees C) ambient temperature range between 40 degrees F

          (4.4 degrees C) and 200 degrees F (93.3 degrees C)."



Mr. Van Sloun is responsible for any further action related to this

issue.



10CFR21 Notification

Model 1154SH9 Ambient Temperature Specification

December 4, 1995

Page 5 of 5



6.0  Any advice related to the potential failure of the item:



     RNII does not have sufficient information to determine the safety

     impact related to plant applications.  Licensees must determine the

     impact on plant operations and plant safety and take action as

     deemed necessary.



Rosemount Nuclear Instruments, Inc. has a strong commitment to the

nuclear industry and assures you that we are dedicated to the supply of

high quality products and services to our customers.  The Nuclear

Regulatory Commission has been advised of this notification.  We are

sorry for any inconvenience.  If there are any questions, or you require

additional information related to this issue, please contact Tim Layer

(612) 828-8240 or Jane Sandstrom and Ian Baldry (612) 828-8250.



Sincerely,



ROSEMOUNT NUCLEAR INSTRUMENTS, INC.



M. L. Van Sloun

Vice President & General Manager



MVS:TJL



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