Power Reactor

Event Number: 43873

Facility: SALEM
Region: 1 State: NJ
Unit: [1] [ ] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: ERIC POWELL
HQ OPS Officer: BILL HUFFMAN

Notification Date: 12/28/2007
Notification Time: 19:58 [ET]
Event Date: 12/28/2007
Event Time: 17:54 [EST]
Last Update Date: 12/28/2007

Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)( iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)( iv)(A) - VALID SPECIF SYS ACTUATION

Person (Organization) :
NEIL PERRY (R1)

 

Unit

SCRAM Code

RX CRIT

Initial PWR

Initial RX Mode

Current PWR

Current RX Mode

1

A/R

Y

100

Power Operation

0

Hot Standby

Event Text

AUTOMATIC TRIP ON FAILURE OF STATION POWER TRANSFORMER

"This 4 hour notification is being made in accordance with 10 CFR 50.72(b)(2)( iv)(B) to report that Salem Unit 1 has experienced an automatic reactor trip. The trip was initiated by failure of 12 Station Power Transformer (SPT). The cause of the trip was the loss of two Reactor Coolant Pumps (RCP) (13 and 14). These RCPs were powered from 'F' and 'G' group busses (non safeguards), which were powered by 12 SPT.

"Post trip the following occurred: 11, 12 & 13 Auxiliary Feed Water (AFW) Pumps [automatically] started after the trip due to valid steam generator low levels (14%) as expected. The automatic start of the Auxiliary Feedwater System due to a valid steam generator low level is an ESF actuation and is an 8 hour report in accordance with 10 CFR 50.72 (b)(3)(iv)(B) . 13 AFW pump was tripped [in accordance with] the Emergency Operating Procedure and will be returned to an operable condition following recovery of steam generator levels.

"All control rods fully inserted following the trip. No ECCS actuation occurred. There was no major equipment out of service prior to the event. No injuries resulted from this event.

"Salem Unit 1 is currently in Mode 3. Reactor Coolant System pressure is at 2235 PSIG and temperature is at 547 degrees with decay heat removal via the Main Steam Dump System. Unit 1 has no active shutdown [Technical Specification] action statements in effect.

"The NRC Resident Inspector has been notified."