Alert

Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

Part 21 Report - 1999-270

LICENSEE: ROCHESTER GAS & ELECTRIC CORP.
SITE: GINNA 1		EN NUMBER:35731
DOCKET:		EVENT DATE: 05-18-99
RX TYPE: PWR		EVENT TIME:
VENDORS: W-2-LP		NOTIFY DATE: 05-18-99
EMERGENCY CLASS: N/A	REGION: 1	STATE: NY	TIME: 12:47
OPS OFFICER: STEVE SANDIN
10 CFR SECTION: CCCC UNSPECIFIED PARAGRAPH

UNIT	SCRAM CODE	RX CRIT	INIT PWR	INITIAL MODE	CURR PWR	CURRENT MODE
1	N	Y	98	Power Operation	98	Power Operation

DEFICIENT CONTROL RELAYS IDENTIFIED DURING PRE-INSTALLATION TESTING.

ON 4/2/99, THE LICENSEE IDENTIFIED THAT CONTROL RELAYS (NBFD65NR) MANUFACTURED BY EATON CORPORATION CONTAINED A MANUFACTURING DEFICIENCY, I.E., "THE RELAY COIL HAD BEEN INCORRECTLY WIRED SUCH THAT THE INTERNAL RELAY DESIGN, WHICH INCLUDES A PICK UP AND A HOLD COIL, WOULD OPPOSE EACH OTHER AT LOWER VOLTAGES AND PROHIBIT HOLDING COIL ACTUATION WHICH RESULTED IN EXCESSIVE RELAY CHATTER." THIS DEFECT WAS IDENTIFIED DURING PRE-INSTALLATION TESTING PRIOR TO USE IN THE REACTOR TRIP LOGIC. NO DEFICIENT RELAYS ARE INSTALLED.

Page Last Reviewed/Updated Thursday, March 25, 2021