Headquarters Daily Report
JANUARY 22, 2001
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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 JANUARY 22, 2001
Licensee/Facility: Notification:
Part 21 Database MR Number: H-01-0003
Indian Point 3/Westinghouse Date: 01/22/01
Subject: Part 21 - Horizontal capacitor mounting may render
safety-related inverter inoperable
Discussion:
VENDOR: Indian Pt 3/Westinghouse PT21 FILE NO: m1-02-0
DATE OF DOCUMENT: 12/15/00 ACCESSION NUMBER:
SOURCE DOCUMENT: EN 37602 REVIEWER: REXB, V. Hodge
The Indian Point 3 licensee reported a potential defect in a
safety-related static inverter supplied by Westinghouse. The licensee
dedication program did not identify a mounting restriction for
replacement capacitors in the inverter. The licensee procured the
capacitors from Mallory, Inc. but learned from Westinghouse that a
Mallory design change to the capacitor imposed the mounting restriction.
Horizontal mounting of the capacitors could result in a short circuit and
render the inverter and associated instrumentation inoperable. On
October 26, 2000, the licensee shut down the plant to replace the
capacitors. Westinghouse has discontinued use of this model Mallory
capacitor, Mallory part number CGS432T200X4C, Westinghouse part number
454A8391110.
The NRC will post ensuing reports on this subject on its Web site at
http://www.nrc.gov/NRC/PUBLIC/PART21/2001.
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HEADQUARTERS MORNING REPORT PAGE 2 JANUARY 22, 2001
Licensee/Facility: Notification:
Part 21 Database MR Number: H-01-0004
General Electric Date: 01/22/01
Subject: Part 21 - Revision of seismic qualification for electrically
operated GE Type AK-15/25 circuit breakers
Discussion:
VENDOR: General Electric PT21 FILE NO: m1-03-0
DATE OF DOCUMENT: 12/18/00 ACCESSION NUMBER:
SOURCE DOCUMENT: REVIEWER: REXB, R. Benedict
General Electric (GE), the vendor for GE Type AK-15/25 low voltage
circuit breakers, reported that electrically operated breakers of this
type may not have the same seismic qualification as manually operated
breakers of this type because of different relay schemes in the closing
circuits. The IEEE 344-1975 zero period acceleration of manually operated
breakers given as 2.08g remains unchanged. The revised zero period
acceleration of electrically operated breakers is 1.4g if an undervoltage
device is installed, 2.4g if not. The vendor informed the affected
nuclear power plants. Electrically operated breakers are supplied to
several nuclear power plants under the following part numbers:
DD265A1305P005-P007, P013, P018, P022-P023, P026-P029, P032, P037, P038
DD213A6963P001, P002, P005, P008, P009, P010
DD213A9686P002, P006-P008, P010, P012, P013
The NRC will post ensuing reports on this subject on its Web site at
http://www.nrc.gov/NRC/PUBLIC/PART21/2001.
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HEADQUARTERS MORNING REPORT PAGE 3 JANUARY 22, 2001
Licensee/Facility: Notification:
Part 21 Database MR Number: H-01-0005
Holtec Date: 01/22/01
Subject: Part 21 - Weights found in removed spent fuel storage racks
exceed those used in design analyses
Discussion:
VENDOR: Holtec PT21 FILE NO: m1-04-0
DATE OF DOCUMENT: 01/04/01 ACCESSION NUMBER:
SOURCE DOCUMENT: EN 37646 REVIEWER: REXB, V. Hodge
Holtec International, a vendor of ancillary components for spent nuclear
fuel racks, reported that weights found in such racks removed from the
Byron station exceeded those used in the design analyses for the racks
and associated lifting equipment. The vendor states that the
discrepancies, 3700-4800 kg (8200-10500 lb), are found in analyses for
seismic loading, bearing pad design, spent fuel pool liner fatigue, and
possibly others. The racks were manufactured by Joseph Oat Corporation.
Similarly designed racks by the same manufacturer installed at the
Braidwood station are scheduled for removal by the end of April 2001. The
vendor accounted for the potential overweight condition with the
Braidwood racks by incorporating an appropriately higher weight into the
design of the lifting equipment and notified the licensee for the Byron
and Braidwood stations.
The NRC will post ensuing reports on this subject on its Web site at
http://www.nrc.gov/NRC/PUBLIC/PART21/2001.
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