Part 21 Report - 1997-030
ACCESSION #: 9701130161
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Master Builders, Inc. Master Builders Technologies
23700 Chagrin Boulevard
Cleveland, Ohio 44122-5554
Phone 216/831-5500
January 8, 1997
Document Control Desk
U.S. Nuclear Regulatory Commission
Washington DC 20555
RE: Notification Of Potential Nonconformance for Masterflow 713 (CMTR)
Grout
To Whom It May Concern:
This is to advise you of a reported nonconformance related to
Masterflow 713 (CMTR) Grout, which Master Builders, Inc. has supplied as
a nuclear safety-related product to 18 nuclear power plants.
Please find attached, a letter of notification that was mailed to
the affected nuclear utilities. It summarizes the nature of the reported
nonconformance. Also attached is the distribution list for the
notification letter. We are currently awaiting response from the various
utilities.
At this point, we have not determined whether or not this situation
has created a substantial safety hazard at any of the affected nuclear
utilities. As stated in the notification letter, the scope and impact of
the nonconformance is highly dependent upon use, age of the material at
the time of placement, and behavior of the material during placement
Nevertheless, we feel that it is prudent to keep your office informed of
all developments and activities pertaining to this situation.
Finally, future correspondence regarding this matter will be handled
by John Dorado, Quality Control Manager or Tom Will, Assistant Product
Manager, who are coordinating all activities related to this matter, with
the exception of an incident involving a substantial safety hazard. Upon
completion of our evaluation, and if necessary, all correspondence
related to the reporting of a substantial safety hazard caused by this
nonconformance will be submitted by me.
If you have any questions, or need additional information, please
contact John or Tom at 216831-5500. If needed, you may contact me at the
same telephone number, as well.
Respectfully Yours,
William K. Secre
Vice President, Research & Development
Master Builders, Inc.
cc: L. M. Shydlowski, J. P. Boyer, P. Vinocur, J. Truax, C. Soeder,
B. Smith, T. Will, T. Coverdale, B. Caine, R. Wells, J. Dorado
nrc9701/jd
Master Builders, Inc. Master Builders Technologies
23700 Chagrin Boulevard
Cleveland, Ohio 44122-5554
Phone 216/831-5500
Date Page 1 of 3
Customer
Sample
Attention:
RE: Notification of Potential Nonconformance for Masterflow 713 (CMTR)
Grout
Dear Customer,
Master Builders recently received notice (written notice on
11/14/96) from the Entergy Operations' Grand Gulf Nuclear Station (Port
Gibson, MS) regarding potentially defective Masterflow 713 (CMTR) Grout.
Based on our records, and in accordance with the requirements and
standard operating procedures of the Master Builders Quality Assurance
Program, we are notifying any nuclear facilities that have ordered
Masterflow 713 (CMTR) Grout from Master Builders in 1996 of the foregoing
situation. Priority has been given to those facilities that have been
shipped the specific lots in question (see below).
Please be advised that we are currently in the evaluation stage of
the process to determine the scope and cause of the problem.
Nature of the Observed Nonconformance
As reported by Grand Gulf Nuclear, the following nonconformances
were observed during their testing:
o foaming/frothing
o segregation
o shrinkage
o slow setting
o low compressive strength
Material was returned to the Master Builders Streetsboro, Ohio QC
Lab for testing. Our preliminary testing confirmed the nonconformances
noted by Grand Gulf Nuclear with the exception of the low strengths (1
day compressive strengths of approximately 2,900 psi were obtained from
our testing).
Lot Numbers in Question
The following are the lot numbers in question:
o 24-3849-W5
o 24-4187-N6
o 24-4582-S6
Page 2 of 3
Other Masterflow 713 (CMTR) Lots from 1996
Although our testing has focused on the above referenced lots, other
lots of Masterflow 713 (CMTR) produced in 1996 include:
o 24-4427-R6
o 24-4884-W6
No material from Lot No, 24-4427-R6 was available for retesting.
Lot No. 24-4884-W6 was tested by the Grand Gulf Nuclear Station and
performed in an acceptable manner (i.e. no frothing/foaming or
segregation). Retesting of material from this lot on material by the
Master Builder Streetsboro, Ohio QC Lab confirmed acceptable performance.
Suspected Cause
At this point, we are in the preliminary stages of our assessment to
determine the root cause of the problem. We suspect that there may be
some type of shelf-life instability associated with one or more of the
raw materials. However, we can only speculate as to the cause until
additional information becomes available.
Testing to date, has demonstrated that any Masterflow 713 (CMTR)
Grout that was used within 3 months of the manufacture date is not
affected by the suspected shelf-life instability problem. As mentioned,
testing performed on a recent lot of Masterflow 713 (CMTR) Grout (Lot No.
24-4884-W6) by Grand Gulf Nuclear and subsequently retested by Master
Builder shows it to perform as expected (i.e. no signs of foam/froth or
segregation).
In addition, the irregular behavior only occurs in the unhardened
state, immediately after mixing. Therefore, material that does not
exhibit this behavior (i.e. foaming/frothing, segregation) will perform
as expected in the hardened state (i.e. conformance to the requirements
of ASTM C1107).
Several efforts are underway to isolate the source of the problem in
order to rectify the situation.
Request for Information
An important part of our evaluation to gain insight as to the scope
and possible cause of the problem, is information from the nuclear
utilities that have been shipped Masterflow 713 (CMTR) Grout in 1996.
Consequently, we respectfully request that you provide us the following
information regarding Masterflow 713 (CMTR) shipped to your facility(s)
in 1996.
o The amount of material that has been installed by lot number.
o How was the material used (type of application/installation).
o When was the material installed.
o Specific lot number(s) of the material used.
o Lab or field test reports pertaining to the material installed
(i.e. performance data, observations about the material
behavior, etc.)
o Any additional documentation that may be helpful.
Page 3 of 3
For any material that has not been placed into service, we recommend
that you do not use such material (put on QA "Hold"). Please contact Tom
Will at ext. 2018 to work out the details on its disposition and
replacement. In addition, we recommend that you evaluate any of the
subject lots of Masterflow 713 (CMTR) Grout that you have placed into
service to ensure that it met the requirements of your specific
application.
As mentioned earlier, based on our testing to date, it has been
demonstrated that any material that was used within 3 months of its date
of manufacture is unaffected by the suspected shelf-life instability
problem. The best indication of the material's acceptable performance is
whether or not the material exhibited any foaming/frothing after mixing.
This behavior would be noticeable immediately after mixing. If the
material did not exhibit this behavior, then the material was not
affected.
Finally, in order for us to proceed with our evaluation in an
expeditious manner, we request that you provide us with the above
mentioned information by 1/17/97. As mentioned, the information is an
important part of our evaluation to determine the scope and cause of the
problem, and to rectify the problem as soon as possible.
If you have any questions, or need additional information, please
contact me at your earliest convenience at 216-831-5500, extension 2240,
or Tom Will at extension 2018.
Sincerely.
John Dorado
Quality Control Manager
Master Builders, Inc.
cc: L. M. Shydlowski, J. P. Boyer, W. Secre, P. Vinocur, J. Truax, C.
Soeder, B. Smith, T. Will
T. Coverdale, R. Wells, L. Huang, B. Caine, G. Culton, Streetsboro
QC
extnot0s/jd
Attachment "Masterflow 713 (CMTR) - Notification Distribution List" 4
pages, omitted.
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