ML23082A000
| ML23082A000 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/23/2023 |
| From: | Henry D Constellation Energy Generation |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| CCN 23-36 | |
| Download: ML23082A000 (1) | |
Text
CCN 23-36 March 23, 2023 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Peach Bottom Atomic Power Station, Units 2 and 3 Subsequent Renewed Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-277 and 50-278
Subject:
Commitment for NETCO Insert 10-Year Surveillance
Reference:
Letter from Michael D. Jesse (Exelon Generation Company, LLC) to U.S.
Nuclear Regulatory Commission, License Amendment Request - Use of Neutron Absorbing Inserts in Unit 2 and 3 Spent Fuel Pool Storage Racks, dated November 3, 2011 (ML113081441)
In the referenced correspondence, Exelon Generation Company, LLC, now Constellation Energy Generation, LLC (CEG) committed to submitting the data and analysis associated with the first 10-year surveillance of the NETCO-SNAP-IN rack inserts to the U.S. Nuclear Regulatory Commission within 60 days following completion of the analysis. This surveillance was completed and approved by plant staff on January 24, 2023. The requested data is attached to this letter.
If you have any questions concerning this letter, please contact the acting Peach Bottom Reactor Engineering Manager, Greg Heasley at (717) 456-4421.
Respectfully, David A. Henry Site Vice President Peach Bottom Atomic Power Station
Attachment:
Ten-Year Surveillance Program for NETCO SNAP-IN Alcan Neutron Absorbing Material Results cc:
w/ Attachment Regional Administrator, Region I, USNRC USNRC Senior Resident Inspector, PBAPS Project Manager - PBAPS, USNRC W. DeHaas, Pennsylvania Bureau of Radiation Protection S. Seaman, State of Maryland
Attachment Commitment for NETCO Insert 10-Year Surveillance Docket Nos. 50-277 and 50-278 Page 1 of 1 ATTACHMENT Peach Bottom Atomic Power Station, Units 2 and 3 Ten-Year Surveillance Program for NETCO SNAP-IN Alcan Neutron Absorbing Material Results The 10-year surveillance is completed by station procedures RT-R-004-972-2 and RT-R-004-972-3 for Peach Bottom, Units 2 and 3, respectively. This surveillance involved the removal of a NETCO rack insert which was bounding for fuel insertion/removal events and service wear. The inspection included both visual and hi-resolution photography.
Thickness measurements were taken along the length of the insert to ensure it has sustained uniform wear over its service life. The acceptance criteria for this test are the following:
- 1. The insert has been installed for a nominal 10 years and is bounding in terms of fuel insert/removal events and service wear.
- 2. Visual inspection and hi-resolution photographs reveal no visible evidence of significant anomalies (e.g. large gouges, cracks, significant discoloration, flaking/missing material, large pits).
- 3. All thickness measurements recorded are within 0.005 of the as-build thickness measurements obtained from NETCO for the insert removed.
Unit 2 Results The Unit 2 surveillance was completed on January 19, 2023, with the results reviewed and approved on January 24, 2023. The inserts performance against the acceptance criteria was satisfactory. Specifically:
- 1. The insert chosen was installed for a nominal 10 years and was bounding in terms of fuel insert/removal events and service wear.
- 2. The visual inspection identified no significant anomalies.
- 3. All thickness measurements were within 0.005 of the as-build thickness measurements.
The results obtained did not warrant detailed analysis, as all acceptance criteria were met.
Unit 3 Results The Unit 3 surveillance was completed on January 24, 2023, with the results reviewed and approved on January 24, 2023. The inserts performance against the acceptance criteria was satisfactory. Specifically:
- 1. The insert chosen was installed for a nominal 10 years and was bounding in terms of fuel insert/removal events and service wear.
- 2. The visual inspection identified no significant anomalies.
- 3. All thickness measurements were within 0.005 of the as-build thickness measurements.
The results obtained did not warrant detailed analysis, as all acceptance criteria were met.