Morning Report for April 22, 2003
Headquarters Daily Report
APRIL 22, 2003
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REPORT NEGATIVE
ATTACHED INPUT RECEIVED
HEADQUARTERS X
REGION I X
REGION II X
REGION III X
REGION IV X
PRIORITY ATTENTION REQUIRED MORNING REPORT - HEADQUARTERS APRIL 22, 2003
Licensee/Facility: Notification:
Part 21 Database MR Number: H-03-0017
Nine Mile Point, Unit 2 Date: 04/22/03
Subject: Part 21-Initial Notification-MSIV disc separated from its stem
allowing the disc/piston assembly to drop into the valve seat
Discussion:
VENDOR: Rockwell PT21 No.: 2003-005-00
DATE OF DOCUMENT: 01/07/03 ACCESSION NUMBER: EN39362
SOURCE DOCUMENT: LETTER REVIEWER: RORP, R. Caldwell
On November 11, 2002, at approximately 0515 hours, with Nine Mile Point
Unit 2 (NMP2) at 100 percent power, an outboard main steam isolation
valve (MSIV) disc separated from its stem allowing the disc/piston
assembly to drop into the valve seat. This led to the rapid loss of flow
in the "B" Main Steam Line resulting in a steam pressure transient.
As result of increasing reactor pressure, the reactor scrammed due to a
"Reactor Pressure High" trip signal. After the reactor scram, all MSIVs
received closure signals and closed. The cause of the closure signals to
the MSIVS was a "Main Steam Line High Flow' MSIV auto-isolation signal.
The high main steam line flow was caused by the increased reactor
pressure and flow being restricted to three of the four main steam lines.
Contact: R. Caldwell, NRR
301-415-1243
E-mail: rkc1@nrc.gov
HEADQUARTERS MORNING REPORT PAGE 2 APRIL 22, 2003
Licensee/Facility: Notification:
Part 21 Database MR Number: H-03-0020
Aalborg Date: 04/22/03
Subject: Part 21 - Initial Notification - Potential defect in Aalborg
Model GFM671S mass flow rate meters
Discussion:
VENDOR: Holtec International PT21 No.: 2003-008-00
DATE OF DOCUMENT: 01/03/03 ACCESSION NUMBER: EN39639
SOURCE DOCUMENT: LETTER REVIEWER: RORP, R. Caldwell
Holtec International reports a potential defect in Aalborg model GFM671S
mass flow rate meters. The instruments are used to verify the correct
amount of helium is backfilled into dry spent fuel storage canisters.
These instruments were never used on a Holtec cask system containing
spent nuclear fuel because the problem was discovered during the
preparatory phase before fuel loading. Therefore, no other Holtec client
is affected for past loading operations.
Four meters were purchased for use at the Trojan nuclear plant to measure
the amount of helium gas injected into a loaded Holtec dry spent fuel
Multipurpose Canister (MPC). It was determined that erroneous data was
coming from the flow rate meters because the published correction factors
for helium/nitrogen were incorrect for this model flow meter. Aalborg is
developing new helium correction factors. In the interim, they have
committed to using helium to calibrate all flow meters destined for use
in measuring helium.
For future MPC loading operations, Holtec users, as well as other
purchasers and licensees are being notified via this report that Aalborg
flow meters procured for use in important-to-safety activities may not be
calibrated. The calibration of Aalborg flow meters should be confirmed
prior to use in important-to-safety activities.
Contact: R. Caldwell, NRR
301-415-1243
E-mail: rkc1@nrc.gov
HEADQUARTERS MORNING REPORT PAGE 5 APRIL 22, 2003
Licensee/Facility: Notification:
Part 21 Database MR Number: H-03-0021
Carboline Company Date: 04/22/03
Subject: Part 21 - Initial Notification - Deficiencies in coating film
affecting its application and aesthetic properties
Discussion:
VENDOR: Carboline Company PT21 No.: 2003-007-00
DATE OF DOCUMENT: 02/17/03 ACCESSION NUMBER: ML030550248
SOURCE DOCUMENT: LETTER REVIEWER: RORP, J. Foster
The hard settling of Carboguard 890 Part B would result in a mixed
product that would have lower pigment volume concentration (PVC) than
standard material that has been uniformly dispersed. Potential
deficiencies would be a lack of film build during application as a result
of a lower initial viscosity and the fact that some particles from the
hard settling may have been dispersed into the mixed product. These
particles could result in the clogging of spray gun tips or having
particles embedded into the applied coating, which are aesthetically
unpleasing. Overall the lack of pigment in the coating film affects the
application and aesthetic properties of the coating and not the
performance properties. The primary criteria for the epoxy coating's
performance are that the stoichiometry of epoxy resin to amine curing
agent are not changed by more than 10%. Based upon a prior non-nuclear
occurrence we know that the hard settling does not alter the
stoichiometry of the coating and the cure of the product will be within
the parameters designed by the formulating chemist. Based upon prior
testing of numerous coatings for use in nuclear power plants we have not
seen any detrimental performance when lower PVC coatings were evaluated.
Resin rich coatings are typically gloss coatings and they aid in
radiation decontamination and chemical resistance. As such, Carboline
does not feel that the performance of the coating will be adversely
affected.
A database has been created (by Carboline) documenting all shipments of
the affected batches made within the 2002 calendar year to present;
approximately 30 utilities/customers are affected. All customers who our
records indicate have been shipped batches 2A9266L, 2A9275L, and 2H9352L
shall be notified promptly. Carboline Company is requesting that
customers review their stock of Carboguard 890 Part B and return the
affected batches for replacement.
Contact: J. Foster, NRR
301-415-3647
E-mail: jwf@nrc.gov
Page Last Reviewed/Updated Wednesday, March 24, 2021
Page Last Reviewed/Updated Wednesday, March 24, 2021