View source for RA-18-032, Revision to Commitments Relating to Resolution of Anchor Darling Double Disc Gate Valve Part 21 Issues

{{Adams
| number = ML18086A013
| issue date = 03/27/2018
| title = Revision to Commitments Relating to Resolution of Anchor Darling Double Disc Gate Valve Part 21 Issues
| author name = Barstow J
| author affiliation = Exelon Generation Co, LLC
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000219
| license number = DPR-016
| contact person = 
| case reference number = NEI 99-04, RA-18-032, SECY-00-0045
| document type = Letter type:RA
| page count = 2
}}

=Text=
{{#Wiki_filter:Exelon Generation,.
RA-18-032                                                                      NEI 99-04 SECY-00-0045 March 27, 2018 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852 Oyster Creek Nuclear Generating Station Renewed Facility Operating License No. DPR-16 NRC Docket No. 50-219

==Subject:==
Revision to Commitments Relating to Resolution of Anchor Darling Double Disc Gate Valve Part 21 Issues

==References:==
: 1. Exelon Generation Company, LLC Letter to USNRC, Commitments Relating to Resolution of Anchor Darling Double Disc Gate Valve Part 21 Issues, dated August 29, 2017 (RA-17-059)
: 2. Exelon Generation Company, LLC Letter to USN RC, Commitments Relating to Resolution of Anchor Darling Double Disc Gate Valve Part 21 Issues, dated December 19, 2017 (RS-17-172)
: 3. Exelon Generation Company, LLC Letter to USN RC, Certification of Permanent Cessation of Power Operations for Oyster Creek Nuclear Generating Station, dated February 14, 2018 (RA-18-027)
In Reference 1, Exelon Generation Company, LLC (EGC) provided a status of the resolution of Anchor Darling Double Disc Gate Valve (ADDDGV) issues specifically related to safety-related Motor Operated Valve (MOV) applications at Oyster Creek Nuclear Generating Station (Oyster Creek), in addition to providing commitment to valve repairs at Oyster Creek. In Reference 2, EGC provided repair schedule commitments for the subject MOVs. In Reference 3, EGC notified the NRC of EGC's revised plans to permanently shut down Oyster Creek and cease operation no later than October 31, 2018.
The purpose of this letter is to notify the NRC of changes to the Oyster Creek ADDDGV MOV commitments for repair (MOVs V-14-0034 and V-14-0035), and diagnostic testing and stem checks with contingent repairs (MOVs V-14-0030, V-14-0031, V-14-0032, V-14-0033) planned for the OC1 R27 Refuel Outage (Fall 2018). These MOVs function as Isolation Condenser Condensate Return valves and Steam Supply Isolation valves. As stated in Reference 3,

U.S. Nuclear Regulatory Commission March 27, 2018 Page 2 Oyster Creek will permanently cease operation by October 31, 2018. As a result of the permanent shut down and reactor vessel defueling, the safety-related function of these MOVs will no longer be required. The Isolation Condenser System was designed to control reactor temperature and pressure when the reactor is isolated from its normal heat removal system.
The function of the Isolation Condensers will not be applicable as they are only required during normal power operations whenever the reactor coolant temperature is greater than 212&deg;F. With no fuel in the reactor, scenarios requiring actuation or isolation of the Isolation Condenser System will no longer be possible. Therefore, the commitments for MOV repair, and diagnostic testing and stem checks with contingent repairs described in References 1 and 2 are no longer applicable and will not be performed.
The revised commitments to not perform repair and testing of the subject MOVs supersede the existing referenced commitments.
These commitment changes have no impact on nuclear safety or safe plant operations. These commitments have not yet been implemented at Oyster Creek and therefore, a notification to the NRC of the commitment changes is warranted in accordance with the EGC Commitment Management Program.
These commitment changes are being submitted for information only. There are no other new or revised regulatory commitments contained in this letter.
If you have any questions regarding this submittal, please contact David J. Distel at (610) 765-5517.
Respectfully submitted, James Barstow Director - Licensing & Regulatory Affairs Exelon Generation Company, LLC cc:     Regional Administrator - NRC Region I NRC Senior Resident Inspector - Oyster Creek Nuclear Generating Station NRC Project Manager, NRR - Oyster Creek Nuclear Generating Station Manager, Bureau of Nuclear Engineering - New Jersey Department of Environmental Protection Mayor of Lacey Township, Forked River, NJ}}

=Text=
{{#Wiki_filter:Exelon Generation,.
RA-18-032                                                                      NEI 99-04 SECY-00-0045 March 27, 2018 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852 Oyster Creek Nuclear Generating Station Renewed Facility Operating License No. DPR-16 NRC Docket No. 50-219

==Subject:==
Revision to Commitments Relating to Resolution of Anchor Darling Double Disc Gate Valve Part 21 Issues

==References:==
: 1. Exelon Generation Company, LLC Letter to USNRC, Commitments Relating to Resolution of Anchor Darling Double Disc Gate Valve Part 21 Issues, dated August 29, 2017 (RA-17-059)
: 2. Exelon Generation Company, LLC Letter to USN RC, Commitments Relating to Resolution of Anchor Darling Double Disc Gate Valve Part 21 Issues, dated December 19, 2017 (RS-17-172)
: 3. Exelon Generation Company, LLC Letter to USN RC, Certification of Permanent Cessation of Power Operations for Oyster Creek Nuclear Generating Station, dated February 14, 2018 (RA-18-027)
In Reference 1, Exelon Generation Company, LLC (EGC) provided a status of the resolution of Anchor Darling Double Disc Gate Valve (ADDDGV) issues specifically related to safety-related Motor Operated Valve (MOV) applications at Oyster Creek Nuclear Generating Station (Oyster Creek), in addition to providing commitment to valve repairs at Oyster Creek. In Reference 2, EGC provided repair schedule commitments for the subject MOVs. In Reference 3, EGC notified the NRC of EGC's revised plans to permanently shut down Oyster Creek and cease operation no later than October 31, 2018.
The purpose of this letter is to notify the NRC of changes to the Oyster Creek ADDDGV MOV commitments for repair (MOVs V-14-0034 and V-14-0035), and diagnostic testing and stem checks with contingent repairs (MOVs V-14-0030, V-14-0031, V-14-0032, V-14-0033) planned for the OC1 R27 Refuel Outage (Fall 2018). These MOVs function as Isolation Condenser Condensate Return valves and Steam Supply Isolation valves. As stated in Reference 3,

U.S. Nuclear Regulatory Commission March 27, 2018 Page 2 Oyster Creek will permanently cease operation by October 31, 2018. As a result of the permanent shut down and reactor vessel defueling, the safety-related function of these MOVs will no longer be required. The Isolation Condenser System was designed to control reactor temperature and pressure when the reactor is isolated from its normal heat removal system.
The function of the Isolation Condensers will not be applicable as they are only required during normal power operations whenever the reactor coolant temperature is greater than 212&deg;F. With no fuel in the reactor, scenarios requiring actuation or isolation of the Isolation Condenser System will no longer be possible. Therefore, the commitments for MOV repair, and diagnostic testing and stem checks with contingent repairs described in References 1 and 2 are no longer applicable and will not be performed.
The revised commitments to not perform repair and testing of the subject MOVs supersede the existing referenced commitments.
These commitment changes have no impact on nuclear safety or safe plant operations. These commitments have not yet been implemented at Oyster Creek and therefore, a notification to the NRC of the commitment changes is warranted in accordance with the EGC Commitment Management Program.
These commitment changes are being submitted for information only. There are no other new or revised regulatory commitments contained in this letter.
If you have any questions regarding this submittal, please contact David J. Distel at (610) 765-5517.
Respectfully submitted, James Barstow Director - Licensing & Regulatory Affairs Exelon Generation Company, LLC cc:     Regional Administrator - NRC Region I NRC Senior Resident Inspector - Oyster Creek Nuclear Generating Station NRC Project Manager, NRR - Oyster Creek Nuclear Generating Station Manager, Bureau of Nuclear Engineering - New Jersey Department of Environmental Protection Mayor of Lacey Township, Forked River, NJ}}