United States Nuclear Regulatory Commission - Protecting People and the Environment

Morning Report for February 9, 2001

                       Headquarters Daily Report

                         FEBRUARY 09, 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 FEB. 09, 2001

Licensee/Facility:                     Notification:

Part 21 Database                       MR Number: H-01-0010
Engine Systems                         Date: 02/09/01


Subject: Part 21 - Potential Emergency Diesel Generator Inoperability for
         Agastat Relays used With Woodward 2301A Electric Governors


Discussion:

VENDOR: Engine Systems			PT21 FILE NO.: m1-07-0

DATE OF DOCUMENT: 01/01/01		ACCESSION NUMBER: ML010180233

SOURCE OF DOCUMENT: Letter		REVIEWER: REXB, E. Goodwin

The emergency diesel generator (EDG) vendor Engine Systems reported a
defect related to use of Agastat 7000 and E7000 series time delay relay
contacts in Woodward 2301A electronic governor circuitry. EDGs provided
by the vendor use 125 VDC control circuits. The Woodward 2301A governor
has an internal power supply that provides about 20 VDC for control
signal inputs. Use of Agastat contacts in this application could cause
the EDG to fail to start or to shut down during a safety event.

The vendor notified its customers, which include domestic nuclear power
plants at Turkey Point and Point Beach, recommending elimination of the
suspect contacts in the 2301A terminal 17 circuit. The vendor states that
elimination of these contacts will not affect operation of the EDG.

In January 1999, the relay vendor Thomas & Betts submitted a Part 21
report for similar potential continuity problems with their E7000 series
time delay relays in applications below 1A and 28 VDC (Part 21 Report
1999-12-0).

The NRC will post ensuing reports on this subject on its Web site at
http://www.nrc.gov/NRC/PUBLIC/PART21/2001.

Contact: E.Goodwin, NRR
	 (301) 415-1154
	 E-mail: efg@nrc.gov


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