ML23290A260
| ML23290A260 | |
| Person / Time | |
|---|---|
| Site: | Callaway  (NPF-30) |
| Issue date: | 10/17/2023 |
| From: | Mahesh Chawla NRC/NRR/DORL/LPL4 |
| To: | Elwood T Ameren Missouri |
| References | |
| L-2023-LLR-0051 | |
| Download: ML23290A260 (3) | |
Text
From:
Mahesh Chawla Sent:
Tuesday, October 17, 2023 2:13 PM To:
Elwood, Thomas B Cc:
Jennifer Dixon-Herrity; Stewart Bailey; Thomas Scarbrough; Nachiketh Chandran
Subject:
Callaway Plant, Unit 1 - LIC-109 Acceptance of 10 CFR 50.55a(z)(1) Requests for Relief From ASME OM Code Pump and Valve Testing Requirements for Fifth 120-Month Inservice Testing Interval - EPID L-2023-LLR-0051
Dear Mr. Elwood,
By letter dated September 27, 2023 (Agencywide Documents and Access Management System (ADAMS) Accession No. ML23270B966), Union Electric Company (Ameren Missouri) submitted to the U.S. Nuclear Regulatory Commission (NRC) three alternative requests PR-01, PR-02, and PR-3 for the fifth 10-year interval inservice testing (IST) program at Callaway Plant, Unit 1 (Callaway) pursuant to Section 50.55a(z)(1) in Title 10 of the Code of Federal Regulations (10 CFR).
Alternative requests PR-01 and PR-02 propose testing of the residual heat removal and centrifugal charging pumps, respectively, using installed pressure gauges, which have a full-scale range that exceeds the Code requirements, but which can be compensated by applying appropriate calibration controls to the existing gauges. Alternative request PR-03 proposes use of a test flow path for the boric acid transfer pumps, with measurement of only differential pressure (in lieu of differential pressure and flow), but which is asserted to provide an adequate means to assess pump performance. The purpose of this email is to provide the results of the NRC staffs acceptance review of the alternative requests.
The NRC acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review.
The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant. The NRC staff has reviewed your submittal and concludes that it provides technical information in sufficient detail to enable the NRC staff to complete its detailed technical review, and to make an independent assessment regarding the acceptability of the requests in terms of regulatory requirements and the protection of public health and safety and the environment. Given the lesser scope and depth of the acceptance review as compared to the detailed technical review, there may be instances in which issues that impact the NRC staffs ability to complete the detailed technical review are identified despite completion of an adequate acceptance review. If additional information is needed, you will be advised by separate correspondence.
Based on the information provided in your submittal, the NRC staff has estimated that this licensing request will take approximately 160 hours0.00185 days <br />0.0444 hours <br />2.645503e-4 weeks <br />6.088e-5 months <br /> to complete. The NRC staff expects to complete this review in approximately 9 months, which is June 30, 2024. If there are emergent complexities or challenges in our review that would cause changes to the initial forecasted completion date or significant changes in the forecasted hours, the reasons for the changes, along with the new estimates, will be communicated during the routine interactions with the assigned project manager.
These estimates are based on the NRC staffs initial review of the application, and they could change, due to several factors including requests for additional information, and unanticipated addition of scope to the review. Additional delay may occur if the submittal is provided to the NRC in advance or in parallel with industry program initiatives or pilot applications.
If you have any questions, please contact me.
Mahesh Chawla, Project Manager Licensing Branch LPL4 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Phone: (301) 415-8371 Email: Mahesh.Chawla@nrc.gov
Hearing Identifier:
NRR_DRMA Email Number:
2277 Mail Envelope Properties (SJ0PR09MB10405C60ED31A3A956CFB775BF1D6A)
Subject:
Callaway Plant, Unit 1 - LIC-109 Acceptance of 10 CFR 50.55a(z)(1) Requests for Relief From ASME OM Code Pump and Valve Testing Requirements for Fifth 120-Month Inservice Testing Interval - EPID L-2023-LLR-0051 Sent Date:
10/17/2023 2:13:02 PM Received Date:
10/17/2023 2:13:00 PM From:
Mahesh Chawla Created By:
Mahesh.Chawla@nrc.gov Recipients:
"Jennifer Dixon-Herrity" <Jennifer.Dixon-Herrity@nrc.gov>
Tracking Status: None "Stewart Bailey" <Stewart.Bailey@nrc.gov>
Tracking Status: None "Thomas Scarbrough" <Thomas.Scarbrough@nrc.gov>
Tracking Status: None "Nachiketh Chandran" <Nachiketh.Chandran@nrc.gov>
Tracking Status: None "Elwood, Thomas B" <TElwood@ameren.com>
Tracking Status: None Post Office:
SJ0PR09MB10405.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 3581 10/17/2023 2:13:00 PM Options Priority:
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