Event Notification Report for December 14, 2022

EN Revision Imported Date: 12/14/2022

EN Revision Text: CONTROL ROD DRIVE MECHANISM (CRDM) PENETRATION DEGRADED

The following information was provided by the licensee via fax:

"Control Rod Drive Mechanism (CRDM) penetration 69 degraded.

"At 0119 [CDT] on October 7, 2022, it was determined that the CRDM penetration 69 was degraded because examination identified unacceptable indications in accordance with ASME Code Case N-729-6. Therefore, this event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(A).

"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."

* * * UPDATE ON 12/13/22 AT 1825 EST FROM KRYSTIAN JARONCZYK TO ADAM KOZIOL * * *

"The notification is being corrected to state:

"At 0119 [CDT] on October 7, 2022, it was determined that the Control Rod Drive Mechanism (CRDM) penetration 69 was degraded because liquid penetrant testing, performed on the seal weld, identified unacceptable indications in accordance with ASME Section III and NRC approved licensee relief request for a previously performed embedded flaw repair. Therefore, this event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(A).

"There was no impact on the health and safety of the public or plant personnel."

Notified R3DO (Ruiz).

EN Revision Imported Date: 12/14/2022

EN Revision Text: AGREEMENT STATE REPORT - LOST GAUGE

The following information was provided by the Georgia Radioactive Material Program via email:

"[The] gauge was placed on the tailgate of a truck by a technician at the Eastman Airport and not secured in the box. It fell out within 4 miles of last use in the city limits of Eastman, Dodge County. The licensee will be contacted for more detailed information. The Georgia Radioactive Material Program will update this report as more information comes in. "

Georgia Incident No.: 62

* * * UPDATE ON 12/13/2022 AT 0813 EST FROM THE GEORGIA RADIOACTIVE MATERIALS PROGRAM TO IAN HOWARD * * *

The following information was provided by the Georgia Radioactive Materials Program via email:

"The Radiation Safety Officer (RSO) stated he informed the local police authority of the lost gauge, and for them to be on the lookout. This is the second incident with the employee and more action will be taken. The RSO and the team went out to look for the gauge today and were unsuccessful in locating it. Upon receipt, we will update this report as more information comes available."

Notified: R1DO (Henrion). Notified via email: NMSS Event Notification and ILTAB.

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

AGREEMENT STATE REPORT - LOST EXIT SIGNS

The following information was provided by the Colorado Department of Public Health and Environment via email:

The licensee discovered twelve tritium exit signs were lost. The exit signs are SRB Technologies Model BR20BK containing 20 Ci of tritium (H-3) each. This is being reported under Colorado Regulations Section 4.51.1.1 (10 CFR 20.2202(a)(1)(i)).

Colorado Incident No.: CO220043

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

DAMAGED RADIOGRAPHIC CAMERA

The following information was provided by the licensee via email:

"At 0200 YST on December 06, 2022, the radiation safety supervisor (RSS) received a call that the technicians had a source which refused to retract to the safe and secured position. During the exposure, the camera fell approximately 4 feet to the ground and landed on the guide tube, which then didn't allow the source to be returned to a shielded position. The radiographers on site followed their procedure and secured their boundaries and notified the RSS. Two RSSs arrived on site at 0245 YST and were able to safely return the source back to locked position. At 1000 YST, a third RSS arrived on location to assist in retrieval.

"The source that required retrieval was IR-192 at 80.6 curies in a Type B container/special form."

AGREEMENT STATE REPORT - LOST EXIT SIGNS

The following information was provided by the Nebraska Dept. of Health and Human Services via email:

The licensee discovered two tritium exit signs were lost. The exit signs are Isolite model SLX60 containing 7.5 Ci of tritium (H-3) each. This is being reported under 10 CFR 20.2202(a)(1)(i).

Nebraska Incident No.: NE220006

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pd

PART 21 - INADEQUATE TORQUE VALUES

The following information was provided by the licensee via email:

"On October 13, 2022, during Refueling Outage 25, 2 bolts and 2 washers were discovered in the strainer basket upstream of the main steam stop valve in the steam line from the 'A' steam generator. It was determined that these bolts and washers were from the main steam isolation valve (MSIV) upstream of the stop valve. One bolt and one washer were also determined to be missing from the MSIV on the line from the 'B' steam generator. The MSIVs are a similar design as the Main Feedwater Isolation Valves (MFIVs). It appears that the torque values for these backseat bolts provided by the vendor weren't sufficient to prevent the bolts from coming loose. Wolf Creek Nuclear Operating Corporation personnel evaluated the condition and determined that the inadequate torque values provided by the vendor could have constituted a substantial safety hazard if left uncorrected. In particular, if bolts had come loose from the MFIVs, they could have traveled downstream to the steam generators and then challenged the integrity of steam generator tubes.

"The NRC Senior Resident Inspector has been notified.

"This is a non-emergency notification required by 10 CFR 21.21(d)(3)(i).

"A written notification will be provided within 30 days."