United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9507200385

Rosemount Nuclear Instruments      Rosemount Nuclear Instruments, Inc.
                                   12001 Technology Drive
                                   Eden Prairie, MN 55344 USA
                                   Tel 1 (612) 828-8252
                                   Fax 1 (612) 828-8280

July 12, 1995

Re:  Notification under 10 CFR Part 21 Revision to Instruction Manual
     4235, Revision Dated October, 1992.

Pursuant to 10CFR21 Paragraph 21.21(b), Rosemount Nuclear Instruments,
Inc. (RNII) is writing to inform you of an issue in the latest revision
to Instruction Manual 4235 for the Model 1152 nuclear qualified
transmitter.  The latest revision to Instruction Manual 4235 was
completed in October 1992.  This revision inadvertently specified an
incorrect process O-ring for use with 1152 High Differential Pressure
Transmitters (Model 1152HP).  The previous revision to Instruction Manual
4235, dated January 1988, specified the correct O-ring for use with these
transmitters.

Model 1152 transmitters are offered in Gage, Absolute, Differential and
High Differential pressure types.  Process O-rings are used to seal the
sensor module to process flange interface.  The material of the process
O-ring is ethylene propylene rubber for all types of Model 1152
transmitters.  Model 1152HP transmitters are specified with process O-
rings having a higher durometer (hardness rating) than process O-rings
specified for Gage (except Range 9 and 0), Absolute, or Differential
types.  The higher durometer O-ring provides sealing of the process
flange interface when subjected to operating pressures up to the
specified 4500 psig over the specified operating temperature range of the
1152 High Differential Pressure transmitter.

RNII is revising Instruction Manual 4235 to specify the correct process
O-ring kit part number and will designate a new revision to the
Instruction Manual.  The revision will be completed and distributed to
users within 60 days of this notification.

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

FISHER-ROSEMOUNT

Rosemount Nuclear Instruments           Rosemount Nuclear Instruments,
Inc.
                                        12001 Technology Drive
                                        Eden Prairie, MN 55344 USA
                                        Tel 1 (612) 828-8252
10CFR21 Notification                    Fax 1 (612) 828-8280
Instruction Manual 4235
July 12, 1995

2.0       Identification of items supplied:

          Instruction Manual 4235, Revision Dated October 1992, for the
          Model 1152 transmitter incorrectly specified a lower durometer
          process O-ring kit to be used with Model 1152 High Differential
          Pressure transmitters (Model 1152HP).  The Instruction Manual
          states at Section 4, Page 5, Table 4-2, "Model 1152 Spare
          Parts", O-ring for Process Flange, Range Code 3-8 (Pkg. of 12),
          Model 1152HP kit part number 01152-0067-0001.  The correct kit
          part number for this O-ring for Process Flange is 01152-0067-
          0002.

3.0       Identification of firm supplying the item:

          Rosemount Nuclear Instruments, Inc.
          12001 Technology Drive
          Eden Prairie,       MN 55344

4.0       Nature of the failure and potential safety hazard:

          The difference of the process O-rings is the durometer
          (hardness rating).  The Model 1152HP, Range Code 3-8,
          transmitters are specified to use a process O-ring having a
          higher durometer than Model 1152 Gage (Except Range Code 9 and
          0), Absolute, or Differential types.

          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.

FISHER-ROSEMOUNT

Rosemount Nuclear Instruments      Rosemount Nuclear Instruments, Inc.
                                   12001 Technology Drive
                                   Eden Prairie, MN 55344 USA
10CFR21 Notification               Tel 1 (612) 828-8252
Instruction Manual  4235           Fax 1 (612) 828-8280
July 12, 1995

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:

          RNII has placed all Instruction Manuals 4235, Revision Dated
          October 1992, on-hold.  The Manual will be revised within 60
          days of this notice.  RNII plans on distributing the revised
          Manual to all recipients of this notification.  A revised copy
          of Table 4-2, "Model 1152 Spare Parts", is included with this
          notification.

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

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

          The end user must determine the full scope of this deviation as
          it relates to 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.  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

enclosure:     Revised Table 4-2

MVS:TJL

FISHER-ROSEMOUNT

                                                           Specifications

Table 4-2. "Model 1152 Spare Parts" omitted.

*** END OF DOCUMENT ***

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