Event Notification Report for September 30, 2020
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/29/2020 - 09/30/2020
Power Reactor
Event Number: 54929
Facility: Comanche Peak
Region: 4 State: TX
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: John Falletich
HQ OPS Officer: Howie Crouch
Region: 4 State: TX
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: John Falletich
HQ OPS Officer: Howie Crouch
Notification Date: 10/03/2020
Notification Time: 11:48 [ET]
Event Date: 09/30/2020
Event Time: 08:15 [CDT]
Last Update Date: 10/03/2020
Notification Time: 11:48 [ET]
Event Date: 09/30/2020
Event Time: 08:15 [CDT]
Last Update Date: 10/03/2020
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(xiii) - Loss Comm/Asmt/Response
10 CFR Section:
50.72(b)(3)(xiii) - Loss Comm/Asmt/Response
Person (Organization):
PATRICIA SILVA (R4DO)
PATRICIA SILVA (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
RADIATION MONITORS REQUIRED FOR EVENT ASSESSMENT OUT OF SERVICE FOR PLANNED MAINTENANCE
"At time 0815 (CDT) on 09/30/20, Main Steamline Radiation Monitor 2-RUK-2325/2327 (Main Steam Line 2-01/2-03 Radiation Monitor) was removed from service for planned maintenance.
"Compensatory measures were in place prior to removing the monitor from service to assure adequate monitoring capability available to implement the CPNPP [Comanche Peak Nuclear Power Plant] emergency plan in the unlikely event of challenges to the steam generator or fuel cladding. The N16 radiation monitor serves as a backup with alarm function and Radiation Protection technicians have been briefed on taking local readings with a Geiger-Mueller tube on MSL 2-01 and MSL 2-03.
"With this radiation monitor non-functional, compensatory measures in place and the monitor not restored to service within 72 hours, the condition is reportable as a loss of assessment capability per 10CFR50.72(b)(3)(xiii).
"Comanche Peak Nuclear Power Plant (CPNPP) has assurance of steam generator integrity and fuel cladding integrity and there is negligible safety significance to the current condition with respect to the public health and safety perspective.
"Corrective actions are being pursued to complete maintenance and restore 2-RUK-2325/2327 to functional status.
"The NRC Resident Inspector has been notified."
"At time 0815 (CDT) on 09/30/20, Main Steamline Radiation Monitor 2-RUK-2325/2327 (Main Steam Line 2-01/2-03 Radiation Monitor) was removed from service for planned maintenance.
"Compensatory measures were in place prior to removing the monitor from service to assure adequate monitoring capability available to implement the CPNPP [Comanche Peak Nuclear Power Plant] emergency plan in the unlikely event of challenges to the steam generator or fuel cladding. The N16 radiation monitor serves as a backup with alarm function and Radiation Protection technicians have been briefed on taking local readings with a Geiger-Mueller tube on MSL 2-01 and MSL 2-03.
"With this radiation monitor non-functional, compensatory measures in place and the monitor not restored to service within 72 hours, the condition is reportable as a loss of assessment capability per 10CFR50.72(b)(3)(xiii).
"Comanche Peak Nuclear Power Plant (CPNPP) has assurance of steam generator integrity and fuel cladding integrity and there is negligible safety significance to the current condition with respect to the public health and safety perspective.
"Corrective actions are being pursued to complete maintenance and restore 2-RUK-2325/2327 to functional status.
"The NRC Resident Inspector has been notified."
Agreement State
Event Number: 54924
Rep Org: MISSISSIPPI DIV OF RAD HEALTH
Licensee: Dickerson and Bowen
Region: 4
City: Brookhaven State: MS
County:
License #: MS-512-01
Agreement: Y
Docket:
NRC Notified By: Robert Sims
HQ OPS Officer: Solomon Sahle
Licensee: Dickerson and Bowen
Region: 4
City: Brookhaven State: MS
County:
License #: MS-512-01
Agreement: Y
Docket:
NRC Notified By: Robert Sims
HQ OPS Officer: Solomon Sahle
Notification Date: 09/30/2020
Notification Time: 16:54 [ET]
Event Date: 09/30/2020
Event Time: 15:00 [CDT]
Last Update Date: 10/01/2020
Notification Time: 16:54 [ET]
Event Date: 09/30/2020
Event Time: 15:00 [CDT]
Last Update Date: 10/01/2020
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
PATRICIA SILVA (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
PATRICIA SILVA (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
EN Revision Imported Date : 10/2/2020
EN Revision Text: AGREEMENT STATE REPORT - VEHICLE RAN OVER PORTABLE MOISTURE GAUGE
This is a summary of a call from the state of Mississippi Division of Radiological Health via phone:
A portable moisture density gauge, containing 9 mCi Cs-137 and 44 mCi Am-241/Be sealed sources, was run over by a vehicle at a construction site in Clinton, MS. No visible damage of the gauge was identified. The licensee's survey results were normal for a retracted source. The gauge was returned to a local office and the state will also perform a survey once they are on site. There was no exposure to personnel.
* * * UPDATE ON 10/01/2020 AT 1957 EDT FROM ART ROBERT SIMS TO BRIAN P. SMITH * * *
The updated report was sent from the state of Mississippi Division of Radiological Health via email:
"Off Norrell Road, off MS. 1-20 Clinton Mississippi Continental Tire Construction site off-ramp, the gauge user was on a noisy construction site with heavy equipment and ear protection requirements. The gauge user was taking a measurement and the high elevated Rubber Tire Roller used to pack asphalt did not see the gauge user. The gauge user yelled at him trying to get him to stop, but due to the noise and the driver not seeing him, the rubber tire roller ran over edge of Humboldt Moisture Density Gauge model 5001 Ser. No. 9624, only damaging the outer housing. The RSO was contacted, used a survey meter Troxalert Model 01754 calibrated 01/10/2020, and received readings of 6 mR/hr which are consistent with previous readings that indicate the source was in the shielded position. The gauge is at the RSO's office and is being sent to Humboldt for electronics and housing repair and a wipe test. The incident was an accident. No violations could be issued to the licensee due to gauge user being present taking moisture readings and the driver of the rubber tire packer just did not see him."
Mississippi Event Number MS-200003
Notified R4DO (Silva), NMSS Events Notification (e-mail)