United States Nuclear Regulatory Commission - Protecting People and the Environment

Morning Report for November 27, 2000

                       Headquarters Daily Report

                         NOVEMBER 27, 2000

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                    REPORT             NEGATIVE            NO INPUT
                    ATTACHED           INPUT RECEIVED      RECEIVED

HEADQUARTERS        X
REGION I                               X
REGION II                              X
REGION III                             X
REGION IV                              X
PRIORITY ATTENTION REQUIRED  MORNING REPORT - HEADQUARTERS NOV. 27, 2000

Licensee/Facility:                     Notification:

Part 21 Database                       MR Number: H-00-0068
Siemens                                Date: 11/27/00


Subject: Part 21 - Error in Pump Model of Computer Code COTRANSA2

Discussion:

VENDOR: Siemens                         PT21 FILE NO: mm-23-0

DATE OF DOCUMENT: 10/19/00              ACCESSION NUMBER: ML003762097

SOURCE DOCUMENT: Letter                 REVIEWER: REXB, V. Hodge

Siemens Power Corporation, a nuclear fuels vendor, reports finding a
deviation in the pump model of the COTRANSA2 computer code. The pump
model was found to improperly calculate the flow resistance during a
seizure event. A Part 21 evaluation of the deviation was completed for
the affected plants, Dresden Units 2 and 3 and Susquehanna Units 1 and 2.
The deviation was determined not to be reportable under 10 CFR 21.21(c)
for Dresden Units 2 and 3 and for events initiated during two-loop
operation of Susquehanna Units 1 and 2. However, the vendor states that
it does not have the capability to evaluate single-loop operation of the
Susquehanna units because that licensee uses minimum core power ratio
(MCPR) operating limits higher than the vendor's MCPR values for that
situation. The vendor stated that it informed these licensees of the
error and evaluation results.

The NRC will post ensuing reports on this subject on its website at
http://www.nrc.gov/NRC/PUBLIC/PART21/2000.

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HEADQUARTERS      MORNING REPORT     PAGE  2          NOVEMBER 27, 2000

Licensee/Facility:                     Notification:

Part 21 Database                       MR Number: H-00-0069
Abb Automation                         Date: 11/27/00


Subject: Part 21 - Incorrect Component in Timer Assembly of CO-4 Relay

Discussion:

VENDOR: ABB Automation                  PT21 FILE NO: mm-24-0

DATE OF DOCUMENT: 10/18/00              ACCESSION NUMBER: ML003762559

SOURCE DOCUMENT: Letter                 REVIEWER: REXB, C. Petrone

ABB Automation, a relay vendor, reports a deviation concerning the Class
1E type CO-4 relay style number 1345D85A01. A documentation error caused
the CO-4 relay to be built with an incorrect component on the solid-state
timer assembly, resulting in a zero-period acceleration (ZPA) rating of
4.6g rather than 5.7g. The documentation has been revised to specify the
correct information for the solid-state timer assembly. The vendor states
that ABB Power T&D purchased three relays of style 1345D85A01 in
September 1997, and that this customer would be notified.

The NRC will post ensuing reports on this subject on its website at
http://www.nrc.gov/NRC/PUBLIC/PART21/2000.

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HEADQUARTERS      MORNING REPORT     PAGE  3          NOVEMBER 27, 2000

Licensee/Facility:                     Notification:

Part 21 Database                       MR Number: H-00-0070
Yuasa                                  Date: 11/27/00


Subject: Part 21 - Failure of 125 VDC Battery to Meet Load
         Capacity Requirements


Discussion:

VENDOR: YUASA                           PT21 FILE NO: mm-25-0

DATE OF DOCUMENT: 10/31/00              ACCESSION NUMBER:

SOURCE DOCUMENT: EN 37476               REVIEWER: REXB, E. Goodwin

The Indian Point 2 licensee reports that a 2GN23 1800 amp-hour battery,
produced by YUASA, Inc., failed the two-hour minimum voltage
characteristic test and the required amp-hour capacity test. These
batteries are used in the 125V DC System, providing a primary power
source to safeguards equipment and logic circuitry. Similar load capacity
failures occurred on June 18 and July 18, 2000. A visual examination of
the plates and separators did not indicate any discrepancies but
microscopic analysis of samples obtained from two different positive
plates revealed cracks within the positive active material, small pores,
and small particle size. This would result in higher internal cell
resistance when charging and discharging a battery. These cracks appear
to have been produced during the manufacturing operation.

The NRC will post ensuing reports on this subject on its website at
http://www.nrc.gov/NRC/PUBLIC/PART21/2000.
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