NRC Action Number(s) and
Facility Name |
Action Type
(Severity) &
Civil Penalty
(if any) |
Date
Issued |
Description |
EA-23-097
Calvert Cliffs Nuclear Power Plant |
NOV
(White) |
10/26/2023 |
On October 26, 2023, the NRC issued a notice of violation associated with a white significance determination process finding to Constellation Energy Generation, LLC at Calvert Cliffs Nuclear Power Plant. The white finding, an issue of low-to-moderate safety significance, involved the licensee’s failure to establish and implement appropriate procedures and instructions for performing maintenance on the safety-related 1A emergency diesel generator as required by Technical Specification 5.4.1.a and Regulatory Guide 1.33. |
EA-14-100
Calvert Cliffs 1 & 2 |
NOV
(White) |
10/27/2014 |
On October 27, 2014, the NRC issued a Notice of Violation to Exelon Generation Company, LLC for a violation of 10 CFR 50.54, "Conditions of Licenses," and risk significant planning standard 10 CFR 50.47(b)(4) associated with a White Significance Determination Process finding. This violation involved Calvert Cliffs Nuclear Power Plant (CCNPP) staff incorporating incorrect threshold values into its emergency action levels (EALs). Specifically, during the replacement of the Unit 2 main steam line radiation monitors, CCNPP's staff inaccurately calculated the associated EALs effluent threshold values for the Alert, Site Area Emergency, and General Emergency classifications. These thresholds were subsequently incorporated into Table R-1, "Effluent Monitor Classification Threshold" of the EALs. This calculation error could have resulted in an over-classification of an event, an unnecessary protective action recommendation, and could have caused offsite response organizations to implement unnecessary protective actions for the public. The finding is also associated with violation of NRC requirements specified in 10 CFR 50.54(q)(2), 10 CFR 50.47(b)(4), and 10 CFR 50, Appendix E. Immediate corrective actions taken to restore compliance included, upon discovery of the incorrect values included entering the issue into the corrective action program, implementing appropriate compensatory actions, and initiating corrective actions to revise the EAL table. |
EA-10-080
Calvert Cliffs 1 & 2 |
NOV
(White) |
08/03/2010 |
On August 3, 2010, the NRC issued a White Significance Determination finding with an associated violation to Calvert Cliffs Nuclear Power Plant (Calvert Cliffs). This White finding involved the licensee's failure to develop and implement scheduled preventive maintenance for Agastat E7000 series time delay relays, as required by Technical Specification 5.4.1. Specifically, subsequent to the approval of Engineering Change Package No. ES200100067, issued in March 2001, the licensee did not replace the relays within the vendor recommended 10-year lifetime, nor establish a performance monitoring program. Consequently, on February 18, 2010, an Agastat E7000 series time delay relay that had a lifetime in excess of 10 years, used in the 2B emergency diesel generator (EDG) protective logic, timed out early and failed to support a demand fast start and run of the 2B EDG. This resulted in the EDG becoming inoperable with the resultant loss of alternating current to the 24 safeguards bus during the dual unit trip that occurred on February 18, 2010. |
EA-08-351
Calvert Cliffs 1 & 2 |
NOV
(White) |
04/03/2009 |
On April 3, 2009, a Notice of Violation (NOV) was issued to Constellation Energy for a violation associated with a White Significance Determination Process finding at Calvert Cliffs. Specifically, the licensee failed to maintain in effect Emergency Plans that met the requirements of 10 CFR 50.47(b)(4) and 10 CFR 50, Appendix E. An emergency action level table used by operators to assess the functionality of the containment barrier during an accident contained an inaccurate threshold for identifying a potential loss of the containment barrier. This error could have adversely impacted the licensee's ability to accurately classify an emergency condition. |
EA-06-198
Calvert Cliffs 1 |
NOV
(White) |
10/27/2006 |
On October 27, 2006, a Notice of Violation was issued for a violation associated with a WHITE significance determination process finding involving inadequate design control during the establishment of the over-current trip setting for an electrical circuit breaker that supplies power to the support systems for the 1A emergency diesel generator (EDG). The violation was cited against 10 CFR Part 50, Appendix B, Criterion III, "Design Control," because the licensee failed to ensure that design control measures provided for verifying or checking the adequacy of the design when Calvert Cliffs modified the on-site electrical distribution design by installing a new 1A EDG in 1996. |
EA-02-159
Calvert Cliffs |
NOV
(White) |
09/09/2002 |
On September 9, 2002, a Notice of Violation was issued for a violation associated with a white SDP finding involving the inability of 49 sirens that were part of the licensee's alert and notification system to activate in a timely manner. The violation cited the licensee's inability to complete the initial notification of the public with the plume exposure pathway emergency planning zone within about 15 minutes after declaring an emergency. |
EA-02-138
Calvert Cliffs 1 & 2 |
NOV
(White) |
08/19/2002 |
On August 19, 2002, a Notice of Violation was issued for a violation associated with a white SDP finding involving the failure to adequately prepare a radioactive material shipment to a waste processing facility. The violation cited the licensee's failure to meet transportation requirements for preparing radioactive material for shipment such that external radiation levels on the surface of the package do not exceed allowable levels under conditions normally incident to transportation. |
EA-01-206
Calvert Cliffs 1 & 2 |
NOV
(Yellow) |
09/19/2001 |
On September 19, 2001, a Notice of Violation was issued for a violation associated with a Yellow SDP finding involving the failure of the auxiliary feedwater pump (AFW) turbine bearing. The violation cited the licensee's failure to follow procedures involving reassembly of the AFW pump outboard bearing housing. |
EA-98-280
Calvert Cliffs 1 & 2 |
NOVCP
(SL III)
$ 55,000 |
09/02/1998 |
Failures to properly implement radiological control procedures. |
EA-98-106
Calvert Cliffs 1 & 2 |
NOV
(SL III) |
03/20/1998 |
Airborne Contamination. |
EA-97-192
Calvert Cliffs 1 & 2 |
NOVCP
(SL II)
$176,000 |
08/11/1997 |
Programmatic breakdown in the area of Radiation Protection during operations. |
EA-96-179
Calverts Cliffs 1 & 2 |
NOVCP
(SL III)
$50,000 |
07/25/1996 |
Appendix R deficiency. Redundant elec surge room served by common HVAC duct, fire dampers closed such that a fire in one room stop HVAC to non-fire room. |