Event Notification Report for June 03, 2026

AGREEMENT STATE REPORT - STUCK SHUTTER

The following information was provided by the Texas Department of State Health Services via phone and email:

"On May 26, 2026, during routine testing, the shutter on a Vega model SH-F2 gauge containing a 1,000 mCi cesium-137 source would not shut. Open is the normal operating position. A service company has been contacted to repair the gauge. The licensee reported there is no risk of additional radiation exposure to members of the general public or radiation workers, due to this on/off mechanism failure. Additional information will be provided as it is received in accordance with SA-300."

Texas incident number: I-10297
NMED number: TX260018

INVALID SPECIFIED SYSTEM ACTUATION

The following information was provided by the licensee via phone and email:

"This 60-day telephone notification is being made per the reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1) to describe an invalid specified system actuation of the Surry Power Station Unit 2 emergency core cooling system (ECCS).

"On 04/12/2026 at 1335 EDT, during Unit 2 cooldown, failure of 02-SI-RLY-SIB2B-RELAY (Unit 2 safety injection block 2 relay, train 'B') prevented the 'B' train of safety injection (SI) from being blocked from initiation signals caused by high steam flow. A SI initiation occurred during reactor coolant system cooldown due to signals from steam flow detectors spiking above the bistable setpoint, which completed the safety injection matrix. Based on then current plant conditions, an actual high steam flow condition could not exist, and therefore, a hi steam flow coincident with a low average coolant temperature or low steam line pressure safety injection should not occur.

"This event is considered an invalid system actuation because the actuation was not initiated in response to actual plant conditions or parameters and was not a manual initiation. All portions of the ECCS functioned as would be expected were the actuation to be valid. Unit 2 entered cold shutdown at 1418. There was no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."