ML20050H015
| ML20050H015 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 02/21/2020 |
| From: | Andrea Kock Division of Fuel Management |
| To: | Libra R Exelon Generation Co |
| Allen W | |
| Shared Package | |
| ML20050G988 | List: |
| References | |
| EPID L-2019-LLA-0071, L-2019-LLA-0071 | |
| Download: ML20050H015 (3) | |
Text
February 21, 2020 Mr. Richard W. Libra Site Vice President Limerick Generating Station 3146 Sanatoga Rd.
Pottstown, PA 19464
SUBJECT:
ALTERNATIVE REQUEST PERTAINING TO DRY SHIELDED CANISTERS EQUIPPED WITH BORAL NEUTRON ABSORBER PLATES (EPID NO. L-2019-LLA-0071)
Dear Mr. Libra:
The purpose of this letter is to communicate NRC approval of your request to use two Dry Shielded Canisters (DSCs) (LGS-61B-007A and LGS-61B-008A) equipped with BORAL neutron absorber plates that were subject to different acceptance testing requirements than those specified in CoC No. 1004 Renewed, Amendment No. 14. By letter dated April 8, 2019, (Agencywide Documents Access and Management System [ADAMS] Accession No. ML19127A247), as supplemented August 8, 2019, and August 27, 2019 (ADAMS Accession Nos. ML19224A052 and ML19239A256 respectively), Exelon Generation Company, LLC (Exelon) requested approval of a one-time alternative for the Limerick Generating Station, Units 1 and 2 Independent Spent Fuel Storage Installation (ISFSI) pursuant to Standardized NUHOMS Certificate of Compliance (CoC) No. 1004 Renewed, Amendment No. 14, Technical Specification (TS) 4.1. CoC No. 1004 Renewed, Amendment No. 14, TS 4.1, states that alternatives to these requirements (i.e., TS 4.1 requirements) may be authorized by the Director of the Office of Nuclear Material Safety and Safeguards, or their designee. The applicants request should demonstrate that the alternative provides an acceptable level of quality and safety or compliance with the specified requirements creates hardship or unusual difficulty without a compensating increase in quality and safety.
The TS 4.1 alternative request involves the testing requirements and acceptance criteria for BORAL neutron absorber plates. In this case, Exelon requested TN Americas LLC (TN) re-certify two model 61BT DSCs (serial numbers LGS-61B-007A and -008A), which had been certified for use by TN under Standardized NUHOMS CoC No. 1004, Amendment No. 9, in accordance with CoC No. 1004 Renewed, Amendment No. 14 as 61BTH Type 1 DSCs. Exelon identified that approval of this alternative request was needed for a planned loading in Fall 2020.
Because there are no substantive design differences between the model 61BT and the model 61BTH Type 1 DSCs, TN compared the documents identifying the as-fabricated characteristics and conditions of the BORAL neutron absorber plates used in the subject DSCs to the requirements and acceptance criteria for BORAL neutron absorber plates in CoC No. 1004 Renewed, Amendment No. 14.
R. Libra 2
The staff finds that the applicant provided documentation which demonstrated re-certification of DSCs LGS-61B-007A and LGS-61B-008A as 61BTH Type 1 DSCs under CoC No. 1004 Renewed, Amendment No. 14 versus 61BT DSCs under CoC No. 1004, Amendment No. 9 meets the regulatory requirements of 10 CFR Part 72. Therefore, this alternative request is approved for the subject two DSCs because it demonstrates an acceptable level of quality and safety. The enclosed safety evaluation report provides further details and the results of the NRC staff review of TNs analyses.
If you have any questions regarding this matter, please contact Chris Allen, of my staff, at 301-415-6877, or william.allen@nrc.gov. Please reference the EPID number above in any correspondence related to this action.
Sincerely,
/RA Christopher Regan Acting for/
Andrea L. Kock, Director Division of Fuel Management Office of Nuclear Material Safety and Safeguards Docket Nos. 50-352, 50-353, and 72-65 EPID L-2019-LLA-0071
Enclosure:
Safety Evaluation Report
R. Libra 3
SUBJECT:
ALTERNATIVE REQUEST PERTAINING TO DRY SHIELDED CANISTERS EQUIPPED WITH BORAL NEUTRON ABSORBER PLATES (EPID NO.
DOCUMENT DATE: February 21, 2020 DISTRIBUTION:
DFM r/f NMSS r/f ADimitriadis, RI BBonser, RII MKunowski, RIII GWarnick, RIV DMarcano, NMSS G:\\SFST\\Allen\\Part 72\\Limerick\\Issue\\Correspondence\\Letter.docx, SER.docx ADAMS Accession Numbers: ML20050G988 (P), ML20050H015 (L), ML20050H016 (SER)
OFFICE:
DFM DFM DFM DFM NAME:
WAllen WWheatley via e-mail JPiotter via e-mail RTorres via e-mail DATE:
12/18/19 1/6/20 12/20/19 1/14/20 OFC:
DFM DFM DFM DFM NAME:
MRahimi via e-mail YDiaz-Sanabria via e-mail DDoyle via e-mail AKock DATE:
1/23/20 1/23/20 1/24/20 02/24/2020 OFFICIAL RECORD COPY