Event Notification Report for March 16, 2015

HIGH PRESSURE COOLANT INJECT DECLARED INOPERABLE FOLLOWING SCHEDULED MAINTENANCE

"At 1820 on March 16th, 2015, the High Pressure Coolant Injection (HPCI) system steam lines were re-pressurized following scheduled maintenance. Upon restoration, an alarm was received that indicated condensate may exist in the steam line. The system responded as designed but the alarm did not clear as expected. Without assurance that the condensate has been removed from the HPCI steam line, HPCI remains inoperable for reasons other than the planned maintenance. As a result, this condition is being reported under 10CFR50.72(b)(3)(v)(D) as a condition that could have prevented fulfillment of the safety function at the time of discovery.

"The health and safety of the public was maintained as the plant was in a normal condition with no initiating event in progress.

"The NRC Resident Inspector has been notified."

The licensee will also notify the State of Minnesota.

* * * RETRACTION FROM RANDY SAND TO DANIEL MILLS AT 1445 EDT ON 5/11/15 * * *

"On March 16, 2015, Northern States Power Minnesota reported a condition that could have prevented the fulfillment of a safety function under 10 CFR 50.72(b)(3)(v)(D). The High Pressure Coolant Injection (HPCI) System was declared inoperable for a reason other than planned maintenance due to the failure of the HPCI Steam Supply Drain Hi Level Bypass Level Switch to clear the high level alarm subsequent to actuation.

"An engineering evaluation was performed and concluded that the function of the primary pathway to remove condensate remained unchallenged by the condition present on the level switch. This conclusion was also validated via thermography with the HPCI steam supply pressurized and bypass valve open. The verification that the primary pathway was functional provides reasonable assurance that the HPCI steam supply was always clear of condensate supporting the ability of HPCI to perform its required safety function. Therefore, the condition present on the level switch did not render HPCI inoperable. The conclusions of the engineering evaluation provide the basis for retraction of the ENS report made on March 17.

"The NRC Resident Inspector has been notified."

The licensee will also notify the State of Minnesota.

Notified R3DO (Peterson).

AGREEMENT STATE REPORT - FIXED GAUGE SHUTTER WOULD NOT CLOSE PROPERLY

The following information was received via fax:

"On 03/17/2015, the RSO for MOTIVA ENTERPRISES called in a preliminary report about a shutter that would not close properly on a gauge installed on a process. The shutter could not be closed or locked out. This situation reoccurs periodically due to the corrosive operating environment of this gauge or device. Routine maintenance was performed by BBP Sales and the device again functioned as designed.

"This situation is reoccurring about every 11 to 14 months. The corrosive and caloric operating environment is the source of this operational problem. The problem with the shutter function is corrected by cleaning and lubricating the mechanism. The equipment/source holder is not broken, just in need of preventive maintenance.

"There was no removable radiation detected in the leak test results and the rotor moved freely when the top plate was removed for the maintenance. BBP Sales was called to perform the maintenance to correct the problem. The gauge/source holder was 'fixed.' The repairman/technician was never exposed to a radiation field greater than 3.0 mR/hr.

"The Department [Louisiana Department of Environmental Quality] considers this item closed and the records will be reviewed during the next inspection."

Gauge is an Ohmart Vega S/N 3211CO with a 175 Ci Cs-137 source.

Louisiana Report: LA 15-0006, T162348