Morning Report for February 9, 2001
Headquarters Daily Report FEBRUARY 09, 2001 *************************************************************************** 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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Page Last Reviewed/Updated Wednesday, March 24, 2021