Event Notification Report for December 07, 2020

EN Revision Imported Date: 12/7/2020

EN Revision Text: PART 21 - ISSUES IDENTIFIED WITH THE ENTERPRISE DIESEL ENGINE SUBCOVER

The following information is excerpted from a facsimile report submitted:

"Engine Systems Inc. (ESI) began a 10 CFR 21 evaluation on November 18, 2016 upon notification of an issue with a subcover assembly at Perry Nuclear Plant. Attempts to install the subcover on their Enterprise diesel engine revealed two issues that prevented successful installation. First, one of the bolt holes was not fully machined through the entire depth of the subcover. Though the bolt could be inserted into the top of its corresponding hole, it would not pass completely through. The second issue was an interference between the rocker arm shaft and its mating pedestal. It was found that incomplete machining of the pedestal prevented the shaft from sitting flat on the pedestal.

"The evaluation was concluded on 12/21/16 and it was determined that this issue is a reportable defect as defined by 10 CFR 21."

The affected facilities are:
First Energy - Perry
Georgia Power - Vogtle

Also listed was the following affected facility:
Korea - Yonggwang

Component: Subcover Assembly, P/N 1A-7846

* * * UPDATE ON 12/4/20 AT 1435 EST FROM DAN ROBERTS TO THOMAS KENDZIA * * *

The following is the summary of a facsimile:

Engine Systems Inc. (ESI) determined that in addition part number 03-362-04-AH was affected by this defect. Two of these parts were supplied to Commanche Peak with an ESI certification date of 8/6/2014.

Notified R4DO (Gepford) and Part 21 Reactors Group (email).

This material event contains a "Less than Cat 3" level of radioactive material.

EN Revision Imported Date: 12/7/2020

EN Revision Text: AGREEMENT STATE REPORT - STOLEN NUCLEAR GAUGES

The following is a summary of information received from the Texas Department of State Health Services (the Agency) via email:

"On November 5, 2020, the Agency was notified by the licensee that three of their nuclear density/level measurements gauges had been stolen from one of their storage sites. The storage site had been vandalized and various pieces of equipment were damaged as well. The licensee has contacted local law enforcement about this incident.

"The gauges contain Cs-137 sources. The total activity of the missing sources is estimated to not exceed 200 mCi. The licensee does not have any additional information regarding the incident or gauges at this time."

Texas Incident Number: 9808

* * * UPDATE ON 11/10/20 AT 0813 EST FROM ART TUCKER TO BRIAN LIN * * *

"On November 9, 2020, the licensee provided additional information on the stolen gauges. All gauges contained cesium-137 sources. Two of the gauges were Thermo Fisher model 5192 gauges. One of the two gauges contained a 250 milliCurie (mCi) (original activity now 215 mCi) source and the other contained a 200 mCi (now 162 mCi) source. The third gauge was a Thermo Fisher model 5190 gauge containing a 200 mCi (now 166 mCi) source. The gauges had been stored in a locked cage on the licensee's site. The gauges were still installed on the pipes they were used on. The licensee stated the last time the gauges were seen was September 1, 2020. The Agency instructed the licensee to notify local scrap yards of the theft and provided them with a copy of the attached picture. The Agency has requested additional information from the licensee. Additional information will be provided as it is received in accordance with SA-300."

Notified R4DO (Dixon), ILTAB (email), NMSS Events Notification (email), and CNSNS-Mexico (email)

* * * UPDATE ON 12/6/20 AT 2301 EST FROM ART TUCKER TO THOMAS KENDZIA * * *

"On December 6, 2020 at 2033 [CST] hours the Agency was notified by the licensee that the three devices reported stolen in this event have been recovered. The gauges are in the possession of the licensee and are locked inside a secured location. Additional information will be provided through NMED as it is received.."

Notified R4DO (Gepford), ILTAB (email), NMSS Events Notification (email), and CNSNS-Mexico (email)

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 MOISTURE DENSITY GAUGE

The following information was received from ALLWEST Testing & Engineering, Inc. via email:

"On October 29, 2020, an ALLWEST employee [the authorized user] was testing the density of freshly placed asphalt on Painted Sky Street in the Spring Hollow Ranch subdivision in Nampa, Idaho using a CPN MC-1 portable nuclear densometer (SN 9216). At approximately 1115 MDT, the gauge was damaged by a Cat CCS9 combination roller under the direction of Nampa Paving.

"[The authorized user] was in the process of running a density test in AC mode when the roller backed up and impacted the gauge. The roller moved off of the gauge after impact. After impact, the handle was oriented at a 45-degree angle from the base of the gauge and the case was detached from the base. [The gauge user] moved away from the damaged gauge and cordoned off the area to prevent anyone from approaching the damaged gauge.

"[The authorized user] immediately contacted the Meridian office assistant RSO [Radiation Safety Officer] who contacted the Corporate RSO. [The assistant RSO] and another ALLWEST employee [the employee] responded to the accident and initiated ALLWEST's emergency protocol. [The assistant RSO] used a survey meter to obtain readings around the damaged gauge. The readings indicated the nuclear sources were not exposed and the shielding was intact. The handle was placed back in the case, and the handle, case and base were placed in the transport box. The transport box was then placed in an overpack barrel and transported back to the ALLWEST office.

"Additional readings were taken using the survey meter around the gauge at the ALLWEST office. All readings were consistent with the sources being in a shielded condition.

"[The assistant RSO] contacted lnstrotek and discussed the condition of the gauge and the readings obtained from the survey meter. lnstrotek representatives indicated it was acceptable to ship the damaged gauge to them for disposal in the transport box. As an additional precaution, [the licensee] wrapped the damaged gauge in lead sheeting and placed the wrapped gauge in the transport box. The transport box with the damaged gauge was then shipped to lnstrotek for disposal.

"ALLWEST sent the personal dosimetry badges for [the authorized user], [the assistant RSO] and [the employee] to Landaeur for immediate evaluation. The radiation dosimetry report from Landauer indicated minimal exposure to all three individuals."

The gauge contained 10 mCi Cs-137 source and a 50 mCi Am-241 source.