7 avril 2015
Cette découverte a été réalisée suite à une inspection par ultrasons pendant l’arrêt pour rechargement du réacteur. Au total, 3 défauts ont été découverts et les inspections continuent.
Type : PWR - Puissance : 2 900 MWTh - Première divergence : 01/1987
Available in english only
Event Number : 50962
Facility : HARRIS
State : NC - Unit : [1]
RX Type : [1] W-3-LP
Event Date : 04/07/2015 - Event Time : 11:47
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(ii)(A) - DEGRADED CONDITION
Initial PWR : 0 % - Current PWR : 0 %
Event Text
REACTOR VESSEL HEAD PENETRATION FLAW IDENTIFIED DURING INSERVICE INSPECTION
"This is a non-emergency report.
"On April 7, 2015, while the Harris Nuclear Plant was shut down for a scheduled refueling outage, the reactor vessel head penetrations were being examined in accordance with Inservice Inspection Program. Ultrasonic examinations identified a flaw in a head penetration nozzle. The unit is in a safe and stable condition. The flaw will be repaired prior to startup from the refueling outage.
"The flaw and repair have no impact to the health or safety of the public.
"The NRC Resident Inspector has been informed."
An extent of condition investigation is on-going.
* * * UPDATE AT 1644 EDT ON 4/9/15 FROM JOHN CAVES TO JEFF HERRERA * * *
"During the ongoing reactor vessel head penetration examinations, two additional flaws were identified in head penetration nozzles. The unit remains in a safe and stable condition. All of the identified flaws will be repaired prior to startup from the refueling outage. The remaining examinations are in progress to determine the extent of condition.
"The NRC Resident Inspector has been notified."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2015/20150410en.html#en50962
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